Flugzeugbau LS1-f Technical specifications

Flight Manual LS1-f
Issued May 2011 0.1
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
0Amendments, list of effective pages, table of contents
0.1 Amendments
Any revision of the present manual, except actual weighing data, must be
recorded in the following table and in case of approved sections endorsed
by the responsible airworthiness authority.
The new or amended text in the revised page will be indicated by a black
vertical line in the right hand margin, and the Revision No. and the date
will be shown on the bottom left hand of the page.
No. Page
Description Date Inserted Signature
1 0.0-7.6 Combination of the initial flight
manuals of the Variants LS1-f
and LS1-f (45), new
standardized format
May 2011
2 1.1 -1.4, 2.1, 2.2,
2.6 – 2.9,
3.1 – 3.3,
4.1 – 4.14,
5.1, 5.2, 6.1 – 6.5,
7.1 – 7.5,
8.1 – 8.4, 9.1
Miscellaneous changes to the
contents of the latest
amendments of the initial flight
manuals
May 2011

Flight Manual LS1-f
Issued May 2011 0.2
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
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Flight Manual LS1-f
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Flight Manual LS1-f
Issued May 2011 0.4
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
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Flight Manual LS1-f
Issued May 2011 0.5
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
0.3 Table of contents
SectionContent page
0
Amendments, list of effective pages, table of contents ........................... 0.1
0.1 Amendments ............................................................................................ 0.1
0.2 List of effective pages.............................................................................. 0.3
0.3 Table of contents...................................................................................... 0.5
1 General ..................................................................................................... 1.1
1.1 Introduction.............................................................................................. 1.1
1.2 Certification basis .................................................................................... 1.1
1.3 Warnings, cautions and notes .................................................................. 1.2
1.4 Descriptive data ....................................................................................... 1.3
1.5 Three view drawing ................................................................................. 1.4
2 Limitations ............................................................................................... 2.1
2.1 Introduction.............................................................................................. 2.1
2.2 Airspeed ................................................................................................... 2.2
2.3 Airspeed Indicator Markings ................................................................... 2.3
2.3.1 LS1-f .................................................................................................. 2.3
2.3.2 LS1-f (45)........................................................................................... 2.3
2.4 Mass (weight)........................................................................................... 2.4
2.5 Centre of gravity ...................................................................................... 2.4
2.6 Approved manoeuvres ............................................................................. 2.4
2.7 Flight crew ............................................................................................... 2.5
2.8 Kinds of operation.................................................................................... 2.5
2.9 Minimum equipment................................................................................ 2.5
2.9.1 Normal operation ............................................................................... 2.5
2.9.2 In addition for cloud flying ................................................................ 2.5
2.10 Aerotow, winch and autotow launching .................................................. 2.6
2.10.1 Weak links.......................................................................................... 2.6
2.10.2 Towing cable for aerotow .................................................................. 2.6
2.10.3 Max. towing speeds ........................................................................... 2.6
2.10.4 Min. towing speeds for aerotow......................................................... 2.6
2.10.5 Tow Release....................................................................................... 2.6
2.11 Tyre Pressure ........................................................................................... 2.6
2.12 Waterballast ............................................................................................. 2.7
2.13 Limitations placards................................................................................. 2.8
2.13.1 Limitations placards LS1-f ................................................................ 2.8
2.13.2 Limitations placards LS1-f (45)......................................................... 2.9
2.13.3 LS1-f and LS1-f (45) ....................................................................... 2.10
3 Emergency procedures............................................................................. 3.1
3.1 Introduction.............................................................................................. 3.1
3.2 Canopy jettison ........................................................................................ 3.1
3.3 Bailing out................................................................................................ 3.1

Flight Manual LS1-f
Issued May 2011 0.6
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SectionContent page
3.4
Stall characteristics and stall recovery..................................................... 3.1
3.5 Spinnng characteristics and Spin Recovery............................................. 3.2
3.6 Recovery from unintentional cloud flying............................................... 3.2
3.7 Emergency wheel up landing................................................................... 3.2
3.8 Emergency ground loop........................................................................... 3.2
3.9 Emergency landing on water ................................................................... 3.3
4 Normal procedures................................................................................... 4.1
4.1 Introduction.............................................................................................. 4.1
4.2 Rigging and derigging, filling and dumping the watertanks ................... 4.1
4.2.1 Rigging............................................................................................... 4.1
4.2.2 Handling and securing the L’Hotellier control quick connectors...... 4.2
4.2.3 Filling the water ballast tanks ............................................................ 4.3
4.2.4 Dumping the waterballast .................................................................. 4.3
4.2.5 Derigging ........................................................................................... 4.4
4.3 Daily Inspection ....................................................................................... 4.5
4.3.1 Inspection prior to rigging: ................................................................ 4.5
4.3.2 Inspection after rigging - Walk around the aircraft ........................... 4.6
4.3.3 Daily inspection after flight operaton ................................................ 4.8
4.3.4 Pre-flight inspection........................................................................... 4.8
4.4 Normal procedures and recommended speeds ........................................ 4.9
4.4.1 Aerotow.............................................................................................. 4.9
4.4.2 Winch launch ..................................................................................... 4.9
4.4.3 Free flight......................................................................................... 4.10
4.4.4 Approach and landing ...................................................................... 4.11
4.4.5 Flight with water ballast................................................................... 4.12
4.4.6 Flight at high altitude and at low temperatures ............................... 4.13
4.4.7 Flights in rain and thunderstorms .................................................... 4.14
4.4.8 Cloud flying ..................................................................................... 4.14
4.4.9 Aerobatics ........................................................................................ 4.14
5 Performance ............................................................................................. 5.1
5.1 Airspeed indicator system calibration...................................................... 5.1
5.2 Stall speeds............................................................................................... 5.2
5.3 Demonstrated crosswing performance .................................................... 5.2
5.4 Gliding performance ................................................................................ 5.2
5.5 Flight polar............................................................................................... 5.3
6 Mass (weight) and balance ...................................................................... 6.1
6.1 Introduction.............................................................................................. 6.1
6.2 Weighing procedures ............................................................................... 6.1
6.3 Weighing record....................................................................................... 6.1
6.4 Basic empty mass and C.G. ..................................................................... 6.1
6.5 Mass of all non-lifting parts (WNLP)...................................................... 6.1
6.6 Max. mass (weight).................................................................................. 6.1

Flight Manual LS1-f
Issued May 2011 0.7
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SectionContent page
6.7
Useful loads (payload) ............................................................................. 6.2
6.8 Loading chart ........................................................................................... 6.2
6.8.1 Cockpit load ....................................................................................... 6.2
6.8.2 Baggage.............................................................................................. 6.2
6.8.3 Waterballast in the wing tanks........................................................... 6.2
6.8.4 Weighing report (for section 6.3)....................................................... 6.3
6.8.5 Ballast chart (total ballast) ................................................................. 6.4
7 Sailplane and systems description ........................................................... 7.1
7.1 Introduction.............................................................................................. 7.1
7.2 Airframe ................................................................................................... 7.1
7.3 Placards .................................................................................................... 7.1
7.4 Aileron control ......................................................................................... 7.2
7.5 Elevator control, trim ............................................................................... 7.2
7.6 Rudder Control......................................................................................... 7.2
7.7 Wheel brake ............................................................................................. 7.3
7.8 Airbrakes.................................................................................................. 7.3
7.9 Waterballast System................................................................................. 7.3
7.10 Cockpit ..................................................................................................... 7.3
7.11 Canopy ..................................................................................................... 7.3
7.12 Tow hooks................................................................................................ 7.3
7.13 Rudder pedal adjustment.......................................................................... 7.4
7.14 Seat, back rest and safety harness............................................................ 7.4
7.15 Instrument panel....................................................................................... 7.4
7.16 Baggage compartment ............................................................................. 7.4
7.17 Oxygen system......................................................................................... 7.4
7.18 Landing gear ............................................................................................ 7.4
7.19 Pitot-/Static pressure system.................................................................... 7.5
7.20 Canopy emergency release ...................................................................... 7.5
8 Sailplane handling, care and maintenance............................................... 8.1
8.1 Introduction.............................................................................................. 8.1
8.2 Inspection period, maintenance ............................................................... 8.1
8.3 Alterations or repairs................................................................................ 8.1
8.4 Tie Down, Parking ................................................................................... 8.2
8.5 Transport .................................................................................................. 8.2
8.6 Towing on the ground.............................................................................. 8.3
8.7 Cleaning and Care.................................................................................... 8.3
8.7.1 Hints for care...................................................................................... 8.3
8.7.2 Plexiglas canopy ................................................................................ 8.4
8.7.3 Metal parts.......................................................................................... 8.4
9 Supplements............................................................................................. 9.1

Flight Manual LS1-f
Issued May 2011 1.1
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
1
General
1.1 Introduction
The sailplane flight manual has been prepared to provide pilots and
instructors with information for the safe and efficient operation of the LS1-f
and LS1-f (45).
This manual includes the material required to be furnished to the pilot by
the airworthiness requirements. It also contains supplemental data supplied
by the glider manufacturer.
1.2 Certification basis
This type of sailplane has been approved by the Luftfahrt-Bundesamt
(LBA) in accordance with:
Airworthiness requirements:
“Airworthiness requirements forSailplanes “ LFS, issued 1966
and
Standards for Structural Substantiation of Glass Fibre Reinforced Plastic
Components for Sailplanes, issued March 1965
Type certified by EASA Type Certificate EASA A.095 Type LS-sailplanes.
Date of certification: 30.08.2010
Initial type certification by LBA (Luftfahrt Bundesamt) with Type
Certificate No. 262.
Date of certification:
Variant LS1-f: 30.08.1974
Variant LS1-f (45): 21.05.1976
Category of Airworthiness: "Utility"

Flight Manual LS1-f
Issued May 2011 1.2
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
1.3 Warnings, cautions and notes
This manual was produced according to the flight manual specimen from
the actual valid certification specifications CS22.
It contains much more information than the initial manual.
The following definitions apply to warnings, cautions and notes used in the
flight manual:
"Warning" means that the non observation of the
corresponding procedure leads to an
immediate or important degradation of the
flight safety.
"Caution" means that the non observation of the
corresponding procedure leads to a minor or
to a more or less long term degradation of
the flight safety.
"Note" draws the attention on any special item not
directly related to safety but which is
important or unusual.

Flight Manual LS1-f
Issued May 2011 1.3
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
1.4 Descriptive data
The LS1-f and LS1-f (45) are single-seater high performance sailplanes with
conventional T-type horizontal tailplane.
Technical details
•Comfortable seating, backrest adjustable at ground.
•Large canopy for good in-flight vision.
•Sealed airbrake- and landing gear boxes.
•Retractable main wheel, spring mounted. Wheel with drum brake actuated
via the airbrake handle.
•Waterballast in the wings in waterbags
Technical data units LS1-f LS1-f (45)
Wing span m 15
Wing surface m
2
9,75
Aspect ratio / 23,1
Length m 6,75
Fuselage hight m 0,83
Fuselage width m 0,62
Horizontal tail span m 2,2
Horizontal tail surface m² 0,98
Waterballast kg (ltr.) max. 2* 45 max. 2*90
Empty mass with min. equipment kg approx. 230 aprox. 235
Wing loading (with 80kg payload) kg/m² approx. 32 approx. 32
max. mass kg 390 439
max. wing loading kg/m² 40 45
Max. speed VNE km/h 250 270
Aerobatics / Not approved