Hoffman DIMONA H 36 Technical specifications

HOFFMANN
AIRCRAFT
HOFFMANN AIRCRAFT CORP.
P.O. Box No. 100
A-1210 Vienna
Austria
Phone [phone] or 25 3635
FLIGHT MANUAL
H36 DIMONA
This Flight Manual must be carried on board of the motorglider at all times.
This Flight Manual is FAA approved for U.S. registered gliders in accordance with the provisions of 14
CFR Section 21.29 and is required by FAA Type Certification Data Sheet No. …………………
Reg. No. …………….. Ser. No. …………………….
Owner : …………………………………………………..
…………………………………………………..
…………………………………………………..
Austrian edition of operating instructions is approved under § 33 ZLLV, Bundesgesetzblatt 415,
Aug 17 1983
Published Nov 15 1985 BAZ—approved on Nov. 22 1985
Approval of translation has been done by best knowledge and judgment. In any case the original text in
German language is authorative.

1
Section 0 Hoffmann Flugzeugbau
Revisions H 36 Dimona
PILOTS OPERATING HANDBOOK
LOG OF REVISIONS
Revision Number and Date
Revised Pages
Description of Revision
All manuals for the Hoffmann H 36 can be ordered from:
Hoffmann Aircraft, Richard —Neutra —Gasse 5, P.O. Box 100, A —1214 Vienna / Austria
WARN ING~
This handbook should not be used for operational purpose unless it is maintained in a current status.
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Hoffmann 1
H 36 DIMONA General
THIS HANDBOOK CONTAINS IMPORTANT INFORMATION FOR THE PILOT!
This information is broken down into informative sections in the order shown below.
Section 0 ------------------ Revisions
Section 1 ------------------ General
Section 2 ------------------ Limitations
Section 3 ------------------ Emergency Procedures
Section 4 ------------------ Normal Procedures
Section 5 ------------------ Performance data
Section 6 ------------------ Weight and Balance/Equipment List
Section 7 ------------------ Motor Glider and Systems Descriptions
Section 8 ------------------ Aircraft Handling, Service & Maintenance
Section 9 ------------------ Supplements
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Hoffmann 1
H 36 DIMONA General
Table of Contents
Section 1
General
Paragraph Page
1.1 Introduction ------------------------------------------------ 4
1.2 Three view drawings --------------------------------------- 4
1.3 Description ------------------------------------------------ 5
1.4 Engine ------------------------------------------------ 5
1.5 Propeller ------------------------------------------------ 5
1.6 Approved Fuels --------------------------------------- 5
1.7 Approved Lubricants --------------------------------------- 6
1.8 Maximum Certified Weights ------------------------------ 6
1.9 Symbols, Abbreviations and Terminology ------------ 6
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Hoffmann 1
H 36 DIMONA General
1 . 1 Introduction:
This handbook contains material required to be furnished to the pilot by JAR 22. It also contains
supplemental data supplied by the airframe manufacturer. Each section is divided by tab markers with
Emergency Procedures tabbed in red.
1.2 Three View Drawings:
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Hoffmann 1
H 36 DIMONA General
TECHNICAL DATA
Wing Span ----------- 16,0 Meters ( 52 ft.)
Length ----------- 6,85 Meters ( 22 ft.)
Wing Area ----------- 15,20 m2 ( 164 sq. ft.)
Wing Ratio ----------- 16,8
Maximum Gross Weight -- 770 kg (1698 lbs.)
Maximum Wing Loading -- 50,7 daN/m2 ( 10,38 lbs/sq. ft.)
Airfoil -------------------- Wortman FX 63-137
Engine -------------------- Limbach L 2000 EB 1.C (59 kw/80 hp. rated at 3,400 Rpm)
Propeller ------------------- Hoffmann Ho—V 62 R/L 160 T or. L 160 BT
1.3 Description:
The Hoffmann H 36 DIMONA is a two seat motor glider constructed from glass fiber. Design features
are unbraced wing, T-type stabilizer, fixed landing gear with steerable tail wheel. All three wheels are
covered with fairings. Seating arrangement is side—by—side. Air brakes are provided in the wings
upper surface. The aircraft is certified in accordance with JAR 22 in the UTILITY CATEGORY.
1.4 Engine:
Limbach L 2ooo EB 1.C,Four cylinders, opposed, air-cooled, direct drive. The engine produces 59
KW/80 Hp at 3.400 RPM.
1.5 Propeller:
Hoffmann Ho—V 62 R/L 160 T or , L 160 BT, two blade with a diameter of 160 cm ( 63 inches). The
propeller has three pitch positions controlled by the pilot.
1.6 Fuel:
The approved fuels are Aviation Grade 100 LL or Automotive fuel ‘Super’. The capacity of the fuel
tank is 83 liters 22 gal. ) . The total usable fuel is 83 liters ( 22 gal)
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Hoffmann 1
H 36 DIMONA General
1.7 Approved Lubricants:
Automotive lubricants with SAE ratings compatible with the seasonal temperatures.
Refer to Section 8, Servicing for lubrication usage chart.
CAUTION
Under no circumstances should Aviation Grade oil be used!
1.8 Maximum Certified Weights:
The maximum allowable take off weight is 770kg (1698 lbs.)
Maximum weight for non-lifting parts is 560 kg (12361bs.)
1.9 Symbols, Abbreviations and Terminology:
Liters Ltr.
Ki1ogramms Kg
Indicated airspeed IAS
Indicated airspeed in Knots KIAS
Maneuvering Speed Va
Max. speed in rough air Vb
Stalling Speed Vso (Airbrakes retracted)
Max. speed not to be exceeded Vne (calm air)
Max. speed with flaps extended Vfe
Stalling speed Vsl (Airbrakes extended)
Max. speed with airbrakes extended Vle
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Hoffmann 2
H 36 DIMONA Limitations
Table of Contents
Section 2
LIMITATIONS
Paragraph: Page
2.1 Category of Airworthiness ------------------------------------ 8
2.2 Permitted Operations --------------------------------------------- 8
2.3 Minimum Equipment --------------------------------------------- 8
2.4 Engine Limitations ------------------------------------------------------ 9
2.5 Oil Pressure ------------------------------------------------------ 9
2.6 Oil Temperature ------------------------------------------------------ 9
2.7 Cylinder Head Temperature -------------------------------------------- 9
2.8 Voltmeter -------------------------------------------------------------- 9
2.9 Airspeed Limitations and Load Factor Limits ----------------- 10 - 11
2.10 Airspeed Indicator Markings ------------------------------------ 12
2.11 Crew Requirements ----------------------------------------------------- 12
2.12 Weights --------------------------------------------------------------- 12
2.13 Center of Gravity Limitations ------------------------------------ 13
2.14 Placards and Markings --------------------------------------------- 14 - 17
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Hoffmann 2
H 36 DIMONA Limitations
2. Operating Limitations
2.1 Category of Airworthiness
Utility (U) according to JAR 22
Certifications basis: JAR 22 (Joint Airworthiness Requirements for gliders and motorgliders)
effective 15.3.82
2.2 Permitted Operations:
The H 36 DIMONA is certified for VFR flights . (Day)
Flights into known icing conditions are prohibited.
Approved aerobatic maneuvers are:
All aerobatic maneuvers inclusive spin and flights in clouds are forbidden.
2.3 Minimum Equipment:
1 Airspeed indicator
1 Altimeter
1 RPM counter with hour-meter
1 Oil pressure indicator
1 Oil temperature indicator
1 Voltmeter
1 Fuel quantity indicator
1 Magnetic compass
1 Cylinder-head temperature indicator
2 Seat Belts
Loading Placard
Data Plate
Flight Manual (Approved)
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Hoffmann 2
H 36 DIMONA Limitations
2.4 Engine Limitations
Engine Type: Limbach L 2000 EB 1C
RPM Limitations (Indicator Markings)
Maximum take off RPM (maximum 5 minutes) 59 KW (So hp.) 3,400 RPM
Maximum ambient atmospheric temperature + 380 C (+100 F)
Maximum RPM (METO) 53 KW (72 hp.) 3,000 RPM
Red Line 3,400 RPM
Caution Range - Yellow Arc 3,000 –3,400 RPM
Operating RPM - Green Arc 700 –3,000 RPM
CAUTION
Avoid RPM during cruise below 2300 min –1!
2.5 Oil Pressure:
Maximum Oil Pressure (red line) 4 bar (55.8 psi)
Minimum Oil Pressure (red line) 1 bar (13.9 psi)
Operating Range (green arc) 1 - 4 bar (13.9 —55.8 psi)
2.6 Oil Temperature:
Maximum Oil Temperature (red line) 120 C (248 F)
Operating Range (green arc) 50 - 120 C (122 —248 F)
Minimum Temperature (red line) 50 C (122 F)
2.7 Cylinder Head Temperature:
Maximum Cylinder head temperature (red line) 250 C. (482 F)
2.8 Voltmeter:
Maximum voltage with engine running: (red line) 14 VDC
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Hoffmann 2
H 36 DIMONA Limitations
2.9 Airspeed limitations and load factor limits:
Maximum allowable airspeed (calm air)
Vne 275 km/h 149 kts 170 mph
Maximum allowable airspeed (turbulent)
Vb 210 km/h 113 kts 130 mph
Maneuvering speed
Va 176 km/h 35 kts 109 mph
Maximum speed with airbrakes extended
Vle 275 km/h 149 kts 170 mph
Stall speed with airbrakes extended
Vsl 70 km/h 38 kts 44 mph
Stall speed with airbrakes retracted
Vso 70 km/h 38 kts 44 mph
Load Limit Factors:
The following accelerations may not be exceeded (airbrakes retracted, normal maneuvers)
At Maneuvering speed: + 5.3 - 2.65
At Maximum speed, Vne: + 4.0 - 1.5
CAUTION
When flying in areas where turbulent weather may be encountered i.e. thunder clouds, wind rotors,
standing waves and mountainous terrain, airspeeds between 210 —275 km/h (113 - 149 kts) are to be
avoided (Caution range in yellow colour on the Airspeed indicator)
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Hoffmann 2
H 36 DIMONA Limitations
2.9 Cont.
To reduce the risk of encountering control flutter at Vne the following table should be used to determine
Vne at various altitudes.
ALTITUDE (m) 0 –2000
(ft) 0 - 6500
3000
10000
4000
13000
5000
16500
6000
20000
Vne (km/h) 275
(kts) 149
259
140
246
133
233
126
221
119
NOTE
Maneuvering speed (Va ) is the maximum speed at which application of full available aerodynamic
control will not overstress the airplane. Increasing altitude increases True Air Speed (TAS).
Indicated Airspeed Errors
The following table illustrates airspeed errors (IAS) due to positioning of the pitot pressure and pitot
static sources.
Pitot and Static Pressure source: Leading edge Horizontal Stabilizer.
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Hoffmann 2
H 36 DIMONA Limitations
2.10 Airspeed Indicator Markings (IAS):
Red Line (Maximum allowable Airspeed)
275 km/h 149 kts 170 mph
Yellow arc (Caution range)
210 —275 km/h 113 —149 kts 130 —170 mph
Green arc (Normal range)
73 —210 km/h 42 —113 kts 48 —130 mph
Yellow Triangle (approach speed)
95 km/h 51 kts 59 mph
Blue Line (Best climb Airspeed)
95 km/h 51 kts 59 mph
CAUTION
Airspeed for the best climb Ratio is:
85 km/h 46 kts 53 mph
2.11 Crew:
Minimum Crew —One Person (min. weight 70 kg = 155 lbs)
CAUTION
Solo flights may be conducted from the left seat only!
2.12 Weights:
Empty Weight: refer to section 6—3, Weighing report
Max. Gross Weight: 770 kg 1698 lbs
Min. Wt. in pilots seat (incl. parachute) 70 kg 135 lbs
Max. Wt. in each seat (incl. parachute) 110 kg 243 lbs
Max. Wt. in baggage compartment 12 kg 27 lbs
CAUTION
Do no overstep the maximum payload stated on p.43
For more detailed loading information refer to section 6, Weight and Balance/Equipment list.
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Hoffmann 2
H 36 Dimona Limitations
3.13 Center of Gravity Limitations
The Center of Gravity ranges are:
Forward: 270 mm aft of leading edge,
wing root rib
Aft Up to 740kg:
385 mm aft of leading edge,
wing root rib
At 770kg
370 mm aft of leading edge,
wing root rib
Between 740 and 770 kg
linear run between
370 and 385 mm
For more detailed Center of Gravity information refer to section 6, Weight. and Balance/Equipment list.
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Hoffmann 2
H 36 DIMONA Limitations
2.14 Placards:
Translation of original placards in German language:
Gepack max 12 kg - Baggage max 12 kg
Storklappen - Radbremse - Airbrake .. . Wheel brake
Vollgas-Gas-Leerlauf - Full - throttle - idle
Brandhahn - Fuel shut off valve
auf ... zu - open - closed
ein . .. aus - on ... off
Luftung - Cabin Air
Heizung - Cabin Heat
Zundung - Ignition
Kraftstoffpumpe - Fuel pump
Hauptsicherung - Main fuse
Kopflastig . .. Trimmung - Nose down .. trim
Schwanzlastig - nose up
Haubennotabwurf - Canopy emergency jettison
Parkbremse .. - Parking brake
Choke - Choke
Text and position of placards in English language:
see following pages.
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Hoffmann 2
H 36 DIMONA Limitations
VH-ABC Registration Call Sign in
Centre of Instrument Panel
Canopy Jettison and Emergency Exit
Purl both RED handles on Canopy frame AFT
Push Canopy up and away
Release safety harness
Stand up and exit aircraft from
left or right sides respectively
When using a manual parachute
Release, wait 2 seconds prior to
pulling D—ring.
On lower center console
Airspeed Limits km/h kts mph
Never Exceed VNE 275 149 170
Rough Air Vb 210 113 130
Maneuvering Va 176 95 109
max Gross Weight 770 kg 1698 lbs
min Payload (in pilot seat) 70 kg 154.lbs
max Payload (in any seat) 110 kg 245 lbs
Baggage Maximum 12 kg 26.5 lbs
max Payload see Flight manual page 43
Below Canopy Frame
Left side
Altitude in ft. 0 - 6500
Vne (KIAS) 149
10,000
140
13,000
133
16,500
126
20,000
119
Below Canopy Frame
Left Side
Labels on operating
Handles Upper Centre
Console
Nose up —Trim —Nose down Next to operating Handle
Parking brake —Pull Air Brake
Lever then move parking brake
lever aft
Baggage Maximum
12 kg 26.5 lbs
In Baggage compartment
2 - 9
Next to operating Handle

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H 36 DIMONA Limitations
2 - 10

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H 36 DIMONA Limitations
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Hoffmann 3
H 36 DIMONA Emergency Procedures
Table of Contents
Section 3
EMERGENCY PROCEDURES
Paragraph Page
3.1 Stalls, Power on ---------------------------- 10
3.2 Stalls, Power off ---------------------------- 19
3.3 Spin Recovery ---------------------------- 19
3.4 Engine failure during Take—Off ---------- 20
3.5 Engine failure in flight ------------------- 21
3.6 Emergency Landing ---------------------------- 21
3.7 Icing ---------------------------------------------- 21
3.8 Carburetor Icing ---------------------------- 21
3.9 Water Landings ---------------------------- 21
3.l0 Engine fire during flight ------------------- 22
3.11 Electrical fire during flight ------------------- 22
3.12 Canopy Jettison, Aircraft exiting during flight 22
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Hoffmann 3
H 36 DIMONA Emergency Procedures
3.1 Stalls, Power On:
On coming stall warning can be recognized by buffeting on the aircraft and a loss of positive control in
the stick and pedals. If permitted to continue, the aircraft will stall and roll over on the stalled wing. A
spin may result. When buffeting is encountered relax back pressure on the stick, and if available, add
power. Recovery from a clean stall will result in an altitude loss of about 40 meters (130 ft)
3.2 Stalls, Power Off, Prop Feathered:
On coming stall warning is buffeting as with power on, however, the aircraft will not roll on a wing and
can be held level with aileron and rudder control. The aircraft will sink vertically at a rate of 700 fpm.
Stall recovery in this mode is to relax back pressure on the stick.
3.3 Spin Recovery:
Reduce power and push control stick full forward. Apply fu11 rudder opposite to spin rotation. Recover
smoothly from the dive.
CAUTION
The aerodynamic clean form or the DIMONA permits speed to build up rapidly. Vne must not be
exceeded. Immediate spin recovery will result in an altitude loss of 280 ft.
C A U T I 0 N
if, under unfavorable circumstances with engine idle a flat spin will result, recover immediately as
above but add power.
3—2