XtremeAIR XA41 User manual

Maintenance Manual XA41/XA42
AMM-XA42-0040-001 C.00
Page date: 25.09.2018 I
Aircraft Maintenance Manual
XA41 / XA42
S/N:
_________________
Registration:
_____________________
Document Number:
AMM-XA42-0040-001
Manufacturer:
XtremeAir GmbH
Harzstraße 2
Am Flughafen Cochstedt
39444 Hecklingen
Germany
This Manual includes the material required to be furnished to the maintenance
personal by EASA regulations, additional information provided by the manufacturer,
and in Chapter 4 the EASA approved Airworthiness Limitations.
The present revision C replaces the previous revision B.
The technical information contained in this document has been approved under the authority of EASA
Design Organization Approval no. EASA.21J.360

Maintenance Manual XA41/XA42
AMM-XA42-0040-001 C.00
II Page date: 25.09.2018
LOG OF REVISIONS
Issue
Date
Changed Pages
Reason Of Change
C.00
25.09.2018
All
Manual rewritten in Simplified
Technical English (ASD-STE 100).
Inclusion of the following
modifications:
-General Corrections
-Grove and Beringer Brake
system improvement
-Canopy seal treatment
-Secondary spar bolt
washer correction
-Camlocks footrest
-Fire protective coating

Maintenance Manual XA41/XA42
AMM-XA42-0040-001 C.00
Page date: 25.09.2018 III
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Maintenance Manual XA41/XA42
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Maintenance Manual XA41/XA42
AMM-XA42-0040-001 C.00
Page date: 25.09.2018 V
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Maintenance Manual XA41/XA42
AMM-XA42-0040-001 C.00
VI Page date: 25.09.2018
Chapter 00 TABLE OF CONTENTS
LOG OF REVISIONS ............................................................................................................. II
LOG OF EFFECTIVE PAGES..................................................................................................III
CHAPTER 00 TABLE OF CONTENTS .................................................................................VI
CHAPTER 01 INTRODUCTION ..................................................................................... 01-1
01-00-00 GENERAL.......................................................................................................... 01-2
01-00-01 Revision Service ............................................................................................ 01-2
01-00-02 Warnings, Cautions and Notes........................................................................ 01-2
01-00-03 Log of Revisions ............................................................................................ 01-2
01-10-00 SAFETY ............................................................................................................ 01-3
CHAPTER 02 ORGANIZATION AND HANDLING OF THIS MANUAL ............................. 02-1
02-00-00 GENERAL.......................................................................................................... 02-2
02-00-01 Revisions....................................................................................................... 02-2
02-00-02 Conversion Factors ........................................................................................ 02-3
CHAPTER 03 GENERAL DESCRIPTION OF THE AIRCRAFT .......................................... 03-1
03-00-00 GENERAL.......................................................................................................... 03-2
03-10-00 DESCRIPTION................................................................................................... 03-2
03-10-01 Construction.................................................................................................. 03-2
03-10-02 Flight Control System..................................................................................... 03-2
03-10-03 Brake System ................................................................................................ 03-2
03-10-04 Powerplant.................................................................................................... 03-3
03-10-05 Fuel System .................................................................................................. 03-3
03-10-06 Electrical System ........................................................................................... 03-3
03-10-07 Instruments .................................................................................................. 03-4
CHAPTER 04 AIRWORTHINESS LIMITATIONS ........................................................... 04-1
04-00-00 GENERAL.......................................................................................................... 04-3
04-00-01 Operating Time ............................................................................................. 04-4
04-10-00 LIFE LIMITED COMPONENTS ............................................................................. 04-4
04-10-01 General......................................................................................................... 04-4
04-10-02 Replacement Time ......................................................................................... 04-4
04-10-03 Service Life Limited Components .................................................................... 04-4
CHAPTER 05 TIME LIMITS AND MAINTENANCE CHECKS ........................................... 05-1
05-00-00 GENERAL.......................................................................................................... 05-2
05-10-00 TIME LIMITS..................................................................................................... 05-2
05-10-01 General......................................................................................................... 05-2
05-10-02 Overhaul Schedule......................................................................................... 05-2
05-10-03 Recommended Replacement Times................................................................. 05-3
05-20-00 SCHEDULED MAINTENANCE CHECKS.................................................................. 05-4
05-20-01 General......................................................................................................... 05-4
05-20-02 First 25 Hour Inspection................................................................................. 05-5
05-20-03 50 Hour Inspection ........................................................................................ 05-5
05-20-04 100 Hour Inspection .....................................................................................05-13
05-20-05 1000 Hour Inspection ...................................................................................05-14
05-20-06 Engine change..............................................................................................05-14
05-20-07 Maintenance Checks Performed .....................................................................05-15
05-50-00 UNSCHEDULED MAINTENANCE CHECKS ............................................................05-17
CHAPTER 06 DIMENSIONS ......................................................................................... 06-1
06-10-00 DIMENSIONS XA41 /XA42 ................................................................................. 06-2
06-10-01 Primary Data ................................................................................................. 06-3
06-10-02 Wing............................................................................................................. 06-3

Maintenance Manual XA41/XA42
AMM-XA42-0040-001 C.00
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06-10-03 Horizontal Tail (with Elevator) ........................................................................ 06-3
06-10-04 Elevator ........................................................................................................ 06-3
06-10-05 Trim Tab ....................................................................................................... 06-3
06-10-06 Vertical Tail (with Rudder).............................................................................. 06-4
06-10-07 Rudder.......................................................................................................... 06-4
CHAPTER 07 LIFTING AND SHORING ......................................................................... 07-1
07-00-00 GENERAL.......................................................................................................... 07-2
07-10-00 JACKING........................................................................................................... 07-2
07-20-00 SHORING ......................................................................................................... 07-2
07-20-01 Shoring the front ........................................................................................... 07-2
07-20-02 Shoring the tail.............................................................................................. 07-3
CHAPTER 08 LEVELING AND WEIGHING .................................................................... 08-1
08-00-00 GENERAL.......................................................................................................... 08-2
08-10-00 LEVELING......................................................................................................... 08-2
08-20-00 MASS &BALANCE.............................................................................................. 08-3
08-20-01 Weighing....................................................................................................... 08-3
08-20-02 Center of Gravity ........................................................................................... 08-4
CHAPTER 09 TOWING AND TAXIING.......................................................................... 09-1
09-00-00 GENERAL.......................................................................................................... 09-2
09-10-00 TOWING........................................................................................................... 09-2
09-20-00 TAXIING........................................................................................................... 09-2
CHAPTER 10 PARKING, MOORING, STORAGE AND RETURN TO SERVICE ................. 10-1
10-00-00 GENERAL.......................................................................................................... 10-2
10-10-00 PARKING AND STORAGE.................................................................................... 10-2
10-10-01 Parking ......................................................................................................... 10-2
10-10-02 Storage......................................................................................................... 10-2
10-20-00 TIEDOWN......................................................................................................... 10-3
10-30-00 RETURN TO SERVICE ........................................................................................ 10-4
CHAPTER 11 PLACARDS AND MARKINGS................................................................... 11-1
11-00-00 GENERAL.......................................................................................................... 11-2
11-20-00 EXTERNAL PLACARDS AND MARKINGS ............................................................... 11-2
11-30-00 INTERNAL PLACARDS AND MARKINGS ............................................................... 11-2
CHAPTER 12 SERVICING............................................................................................. 12-1
12-00-00 GENERAL.......................................................................................................... 12-2
12-10-00 REPLENISHING ................................................................................................. 12-3
12-10-01 Refueling ...................................................................................................... 12-3
12-10-02 Defueling ...................................................................................................... 12-4
12-10-03 Fuel Drainage ................................................................................................ 12-4
12-10-04 Replenishment of Engine Oil........................................................................... 12-4
12-10-05 Engine Oil Change ......................................................................................... 12-6
12-10-06 Replenishment of Brake Fluid ......................................................................... 12-7
12-10-07 Tire Inflation ................................................................................................. 12-8
12-10-08 Overview of Fluids for Replenishing ................................................................ 12-8
12-20-00 SCHEDULED SERVICING.................................................................................... 12-9
12-20-01 Cleaning of the external surfaces.................................................................... 12-9
12-20-02 Cleaning of the internal surfaces..................................................................... 12-9
12-20-03 Engine Cleaning............................................................................................12-10
12-30-00 UNSCHEDULED SERVICING ..............................................................................12-10
12-30-01 Removal of Snow and Ice..............................................................................12-10
CHAPTER 20 STANDARD PRACTICES - AIRFRAME ..................................................... 20-1
20-00-00 GENERAL.......................................................................................................... 20-2
20-10-00 STANDARD PRACTICES -AIRFRAME................................................................... 20-2

Maintenance Manual XA41/XA42
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20-10-01 Types of Bolts ............................................................................................... 20-2
20-10-02 Standard Torque Values ................................................................................. 20-3
20-10-03 Special Torque Values .................................................................................... 20-3
20-10-04 Torque Measurement..................................................................................... 20-4
20-10-05 Check for Delamination .................................................................................. 20-4
20-10-06 Flexible Hoses ............................................................................................... 20-4
20-10-07 Fittings.......................................................................................................... 20-5
20-20-00 ASSEMBLY AND DISASSEMBLY INSTRUCTIONS................................................... 20-6
20-20-01 General......................................................................................................... 20-6
20-20-02 Assembly Instructions .................................................................................... 20-7
20-20-03 Disassembly Instructions................................................................................ 20-9
CHAPTER 21 ENVIRONMENTAL SYSTEMS .................................................................. 21-1
21-00-00 GENERAL.......................................................................................................... 21-2
21-20-00 DISTRIBUTION ................................................................................................. 21-2
21-20-01 Air Vents ....................................................................................................... 21-2
21-20-01 Canopy Defog................................................................................................ 21-3
CHAPTER 23 COMMUNICATION.................................................................................. 23-1
23-00-00 GENERAL.......................................................................................................... 23-2
23-10-00 VHF COMMUNICATION TRANSCEIVER................................................................ 23-2
23-40-00 INTERCOM ....................................................................................................... 23-2
23-50-00 HEADPHONES /HELMETS.................................................................................. 23-2
CHAPTER 24 ELECTRICAL POWER .............................................................................. 24-1
24-00-00 GENERAL.......................................................................................................... 24-2
24-30-00 DC GENERATOR ................................................................................................ 24-2
24-50-00 ELECTRICAL LOAD DISTRIBUTION..................................................................... 24-2
CHAPTER 25 EQUIPMENT AND FURNISHING ............................................................. 25-1
25-10-00 COCKPIT .......................................................................................................... 25-2
25-10-01 Seats ............................................................................................................ 25-2
25-10-02 Harnesses ..................................................................................................... 25-2
25-10-03 Document Bag............................................................................................... 25-4
25-50-00 CARGO COMPARTMENTS................................................................................... 25-4
25-60-00 EMERGENCY ..................................................................................................... 25-5
25-60-01 Emergency Locator Transmitter ...................................................................... 25-5
25-60-02 Parachutes .................................................................................................... 25-6
CHAPTER 27 FLIGHT CONTROLS ................................................................................ 27-1
27-00-00 GENERAL.......................................................................................................... 27-2
27-00-01 Control Sticks ................................................................................................ 27-3
27-00-02 Torque Tube ................................................................................................. 27-4
27-00-03 Control Rods ................................................................................................. 27-7
27-10-00 AILERONS .......................................................................................................27-10
27-20-00 RUDDER..........................................................................................................27-17
27-20-01 Rudder Pedals ..............................................................................................27-18
27-20-02 Control Cables ..............................................................................................27-23
27-30-00 ELEVATOR AND TRIM TAB ................................................................................27-26
27-30-01 Trim Tab ......................................................................................................27-27
27-30-02 Elevator bellcrank .........................................................................................27-29
27-30-03 Elevator control rod CFRP..............................................................................27-30
CHAPTER 28 FUEL ....................................................................................................... 28-1
28-00-00 GENERAL.......................................................................................................... 28-2
28-10-00 STORAGE ......................................................................................................... 28-3
28-10-01 Acro Tank ..................................................................................................... 28-3
28-10-02 Flop Tube...................................................................................................... 28-4
28-10-03 Wing Tanks ................................................................................................... 28-6

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28-10-04 Ventilation Lines ............................................................................................ 28-6
28-20-00 DISTRIBUTION ................................................................................................. 28-7
28-20-01 Fuel Selector Valve and Fuel Selector Switch ................................................... 28-7
28-20-02 Fuel Lines.....................................................................................................28-10
28-20-03 Fuel Filter.....................................................................................................28-10
28-20-04 Auxiliary/Boost Pump ....................................................................................28-11
28-40-00 INDICATING ....................................................................................................28-12
28-40-01 Fuel Quantity Indicator .................................................................................28-12
28-40-02 Fuel Quantity Sensors ...................................................................................28-12
CHAPTER 32 LANDING GEAR ...................................................................................... 32-1
32-00-00 GENERAL.......................................................................................................... 32-2
32-10-00 MAIN LANDING GEAR........................................................................................ 32-2
32-20-00 TAIL GEAR........................................................................................................ 32-4
32-40-00 WHEELS AND BRAKES ......................................................................................32-10
32-40-01 Wheels.........................................................................................................32-10
32-40-02 Brakes .........................................................................................................32-17
32-50-00 MAIN LANDING GEAR FAIRINGS .......................................................................32-21
32-60-00 BRAKE SYSTEM................................................................................................32-22
CHAPTER 33 LIGHTS ................................................................................................... 33-1
33-40-00 ANTI-COLLISION LIGHTS (ACL) ......................................................................... 33-2
CHAPTER 34 NAVIGATION AND PITOT STATIC SYSTEM ............................................ 34-1
34-00-00 GENERAL.......................................................................................................... 34-2
34-10-00 FLIGHT ENVIRONMENT DATA ............................................................................ 34-2
34-10-01 Pitot Static System......................................................................................... 34-2
34-10-02 Altimeter ....................................................................................................... 34-3
34-10-03 Airspeed Indicator ......................................................................................... 34-3
34-20-00 DIRECTION ...................................................................................................... 34-3
34-20-01 Magnetic Compass......................................................................................... 34-3
34-50-00 DEPENDENT POSITION DETERMINING............................................................... 34-4
34-50-01 Transponder.................................................................................................. 34-4
CHAPTER 39 ELECTRIC/ELECTRONIC PANELS & MULTIPURPOSE PARTS ................. 39-1
39-00-00 GENERAL.......................................................................................................... 39-2
39-10-00 INSTRUMENT AND CONTROL PANELS ................................................................ 39-2
39-10-01 XA41 Instrument Panel .................................................................................. 39-3
39-10-02 XA42 Rear Instrument Panel .......................................................................... 39-4
39-10-03 XA42 Front Instrument Panel.......................................................................... 39-5
39-20-00 ELECTRICAL SWITCH PANEL.............................................................................. 39-6
39-30-00 THROTTLE AND TRIM CONTROL ........................................................................ 39-7
39-50-00 CIRCUIT BREAKER PANEL.................................................................................. 39-9
CHAPTER 51 STANDARD PRACTICES AND STRUCTURES - GENERAL......................... 51-1
51-30-00 MATERIALS ...................................................................................................... 51-2
51-30-01 Composite Parts ............................................................................................ 51-2
51-30-02 Steel Parts..................................................................................................... 51-4
51-30-03 Aluminum Parts ............................................................................................. 51-5
51-30-04 Titanium Parts ............................................................................................... 51-5
51-30-05 Paint............................................................................................................. 51-6
51-30-06 Agents and Sealers ........................................................................................ 51-8
51-30-07 Exterior Foil................................................................................................... 51-9
51-60-00 CONTROL SURFACE BALANCING .......................................................................51-10
51-60-01 Weighing and Calculation of the Control Surface Moments ..............................51-10
51-70-00 REPAIRS..........................................................................................................51-11
51-70-10 Repairs of Reinforced Glass and Carbon Fiber Parts ........................................51-11
51-70-11 Damage inspection .......................................................................................51-11
51-70-12 Damage description ......................................................................................51-12

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51-70-13 Repair guidelines ..........................................................................................51-12
51-70-15 Painting of Composite Parts...........................................................................51-14
51-70-20 Repair of Aluminum and Steel Components ....................................................51-14
51-70-25 Aluminum and Steel Components Refinishing .................................................51-14
CHAPTER 52 CANOPY.................................................................................................. 52-1
52-00-00 GENERAL.......................................................................................................... 52-2
CHAPTER 53 FUSELAGE............................................................................................... 53-1
53-00-00 GENERAL.......................................................................................................... 53-2
CHAPTER 55 STABILIZERS ......................................................................................... 55-1
55-00-00 GENERAL.......................................................................................................... 55-2
55-10-00 HORIZONTAL STABILIZER ................................................................................. 55-2
55-20-00 ELEVATOR........................................................................................................ 55-4
55-30-00 TRIM TAB ......................................................................................................... 55-6
55-60-00 RUDDER........................................................................................................... 55-7
CHAPTER 57 WING ..................................................................................................... 57-1
57-00-00 GENERAL.......................................................................................................... 57-2
57-10-00 WING............................................................................................................... 57-2
57-60-00 AILERONS ........................................................................................................ 57-7
57-70-00 SIGHTING DEVICES .......................................................................................... 57-8
CHAPTER 61 PROPELLER ............................................................................................ 61-1
61-00-00 GENERAL.......................................................................................................... 61-2
61-10-00 PROPELLER ...................................................................................................... 61-2
61-20-00 PROPELLER CONTROL....................................................................................... 61-2
CHAPTER 71 POWER PLANT ....................................................................................... 71-1
71-00-00 GENERAL.......................................................................................................... 71-2
71-01-00 MANIFOLD........................................................................................................ 71-2
71-10-00 COWLING......................................................................................................... 71-3
71-10-01 Upper Cowling............................................................................................... 71-3
71-10-02 Lower Cowling............................................................................................... 71-3
71-20-00 ENGINE MOUNT................................................................................................ 71-4
71-30-00 FIRE WALL ....................................................................................................... 71-6
CHAPTER 72 ENGINE .................................................................................................. 72-1
72-00-00 GENERAL.......................................................................................................... 72-2
72-10-00 ENGINE ............................................................................................................ 72-2
CHAPTER 76 ENGINE CONTROLS................................................................................ 76-1
76-00-00 GENERAL.......................................................................................................... 76-2
76-10-00 THROTTLE CONTROL ........................................................................................ 76-2
76-20-00 MIXTURE CONTROL .......................................................................................... 76-5
CHAPTER 78 EXHAUST ................................................................................................ 78-1
78-00-00 GENERAL.......................................................................................................... 78-2
CHAPTER 79 OIL SYSTEM ........................................................................................... 79-1
79-00-00 GENERAL.......................................................................................................... 79-2
79-00-01 Christen Inverted Oil System .......................................................................... 79-3
79-40-00 OIL COOLING ................................................................................................... 79-4
CHAPTER 85 SMOKE SYSTEM...................................................................................... 85-1
85-00-00 GENERAL.......................................................................................................... 85-2
85-10-00 SMOKE OIL TANK .............................................................................................. 85-2
85-20-00 SMOKE DISTRIBUTION...................................................................................... 85-4

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CHAPTER 91 CHARTS .................................................................................................. 91-1
91-00-00 MAIN WIRING DIAGRAMS ..................................................................................... 91-2
91-01-00 MVP-50...............................................................................................................91-11
91-02-00 WIRING WING ....................................................................................................91-21
91-03-00 RADIO ................................................................................................................91-23
91-04-00 TRANSPONDER ...................................................................................................91-28
91-05-00 TRIM ..................................................................................................................91-33
91-06-00 SMOKE SYSTEM ..................................................................................................91-34
91-07-00 ELT ....................................................................................................................91-39
91-08-00 DIGITAL DEVICES ...............................................................................................91-40
91-09-00 GPS ....................................................................................................................91-50
91-10-00 OPTIONAL WIRING DIAGRAMS ............................................................................91-54
91-13-00 AUDIO................................................................................................................91-55
APPENDIX
APPENDIX 1 FORM: OCCURRENCE REPORT .................................................................A-1
APPENDIX 2 FORM: MASS AND BALANCE ....................................................................A-2
APPENDIX 3 FORM: COMPASS COMPENSATION ..........................................................A-3
APPENDIX 4 FORM: GROUND RUN REPORT.................................................................A-4
APPENDIX 5 FORM: CHECK FLIGHT REPORT ...............................................................A-5
APPENDIX 6 FORM: CONTROL SURFACES MASS AND MOMENT ..................................A-6
APPENDIX 7 FORM: CONTROL SURFACES DEFLECTIONS ............................................A-7
APPENDIX 8 DAMAGE DESCRIPTION ...........................................................................A-8

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Chapter 01 Introduction
Table of Contents
Chapter
Title
Page
01-00-00
GENERAL
01-2
01-00-01
Revision Service
01-2
01-00-02
Warnings, Cautions and Notes
01-2
01-00-03
Log of Revisions
01-2
01-10-00
SAFETY
01-3

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WARNING
CAUTION
NOTE
01-00-00 GENERAL
This Aircraft Maintenance Manual (AMM) includes the necessary data to do the maintenance
of the XA41 and the XA42. The structure is as follows: Description of the systems,
troubleshooting procedures, removal and installation procedures and maintenance
instructions.
Use the AMM with these (and other) manuals and the related service bulletins:
• XtremeAir. Illustrated Parts Catalogue, IPC-XA42-0050-001.
• XtremeAir. Aircraft Flight Manual, AFM-XA41-0040-002 and AFM-XA42-0040-002
• Kannad. Installation Manual - Operation Manual –ELT Kannad 406 AF-Compact.
DOC08038C
• Lycoming. AEIO-580-B1A Operation and Installation Manual. P/N 60297-32
MVP-50P Operating Instructions.
• Unison. 4300/6300 Series Magneto Maintenance and Overhaul Manual. L-1363D
• mt-Propeller. ATA 61-01-24 (E-124) Operation and Installation Manual –
Hydraulically Controlled Variable Pitch Propeller MTV-9-().
• mt-Propeller. ATA 61-20-48 (E-1048) Operation and Installation Manual - Hydraulically
Constant Speed Governor P-8()()-().
01-00-01 Revision Service
The manufacturer has a revision service for the Aircraft Maintenance Manual. The revision
shows the design changes to the aircraft or changes in procedures. Each page and each
chapter of the manual show the date of the first issue. Changed pages or chapters show the
date of the revision.
01-00-02 Warnings, Cautions and Notes
Obey all the usual safety precautions and maintenance instructions when you do the
maintenance. The definitions of Warnings, Cautions, and Notes are as follows:
If you do not obey the operating procedures or other instructions carefully, there is a risk of injury or
death.
If you do not obey the operating procedures or other instructions carefully, there is a risk of damage
to equipment.
Notes give necessary information to help the reader during a procedure.
01-00-03 Log of Revisions
This aircraft maintenance manual has a log of revisions. Use the log of revisions to show
when changes were added to the aircraft maintenance manual.

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01-10-00 SAFETY
Obey these precautions to prevent injury and/or damage during the maintenance
procedures on the XA41 and the XA42:
• Only approved personnel must do the maintenance work and inspections.
• Read the maintenance manual before you start the maintenance work.
• To do the maintenance work, refer to the applicable national safety requirements.
• Obey the warnings, cautions and notes in this manual.

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Chapter 02 Organization and Handling of this Manual
Table of Contents
Chapter
Title
Page
01-00-00
GENERAL
01-2
01-00-01
Revision Service
01-2
01-00-02
Warnings, Cautions and Notes
01-2

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02-00-00 GENERAL
This AMM agrees with the Air Transport Association of America, ATA Specification No. 100.
For data about a special system, refer to the list of chapters and find the chapter number.
The first page of each chapter shows the table of contents.
The chapters use a numbering system which shows the chapter, section and subject as
follows:
02-01-04
chapter –section –subject
This example refers to chapter 02, section 01 and subject 04.
The pages of each chapter have continuous numbers. Page 1 is the title page of each
chapter. Figure 1 is the first figure in each chapter.
02-00-01 Revisions
The manufacturer makes changes to the aircraft maintenance manual to show design
changes, maintenance procedure changes or other changes. Each group of changes is
referred to as a revision.
A manual revision includes these items:
•The changed pages
•The cause of the revision
•Instructions how to put the revision into the AMM
• A new list of effective chapters
• A vertical bar in the left margin of the page shows the changes.
This is the approved AMM. It is not permitted to replace or remove pages and to change or
add text unless there is an approval by EASA or the manufacturer.
NOTE

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02-00-02 Conversion Factors
Dimension
Conversion Factor
Unit
SI to US/Imperial
US/Imperial to SI
Length
Millimeter (mm)
Meter (m)
Kilometer (km)
Inch (in)
Foot (ft)
Nautical Mile (nm)
(mm)/25.4 = (in)
(m)/0.3048 = (ft)
(km)/1.852 = (nm)
(in)*25.4 = (mm)
(ft)*0.3048 = (m)
(nm)*1.852 = (km)
Velocity
Kilometers per hour (km/h)
Meters per second (m/s)
Miles per hour (mph)
Knots (kts)
Feet per minute (fpm)
(km/h)/1.852 = (kts)
(km/h)/1.609 = (mph)
(m/s)*196.85 = (fpm)
(mph)*1.609 = (km/h)
(kts)*1.852 = (km/h)
(fpm)/196.85 = (m/s)
Rotational Speed
Revolutions per minute (rpm)
(rpm) = (min-1)
Pressure
Bar (bar)
Pounds per square inch (psi)
(bar)*14.5038 = (psi)
(psi)/14.5038 = (bar)
Force or Weight
Newton (N)
Pound (lb)
(N)/4.448 = (lb)
(lb)*4.448 = (N)
Torque
Newton meter (Nm)
Foot pound (ft.lb)
Inch pound (in.lb)
(Nm)/1.3558 = (ft.lb)
(Nm)*8.851 = (in.lb)
(ft.lb)*1.3558 = (Nm)
(in.lb)/8.851 = (Nm)

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(continued)
Dimension
Conversion Factor
Unit
SI to US/Imperial
US/Imperial to SI
Volume
Liter (l)
US gallon (US gal)
US quart (USqt)
Cubic inch (in³)
(l)/3.7854 = (US gal)
(l)/0.9464 = (USqt)
(l)/61.024 = (in³)
(US gal)*3.7854 = (l)
(USqt)*0.9464 = (l)
(in³)*61.024 = (l)
Mass
Kilogram (kg)
Pound (lb)
(kg)/0.45359 = (lb)
(lb)*0.45359 = (lb)
Temperature
Degree Celsius (°C)
Degree Fahrenheit (°F)
(°C)*1.8 + 32 = (°F)
(°F)-32)/1.8 = (°C)