Hoffmann HO-V 62 User manual

Manual No. E 0107.72A
August 2003
OPERATION AND MAINTENANCE MANUAL
HO-V 62
Mechanical Two-Position Propeller
(Take Off and Feathering)
HO-V 62 R - ()
Mechanical Three-Position Propeller
(Take Off, Cruise and Feathering)
HOFFMANN GmbH & Co. KG
Küpferlingstraße 9
D-83022 Rosenheim
Tel. ++49/8031/1878-0
Fax ++49/8031/1878-78

Hoffmann Propeller
Manual No. E 0107.72A
Record of Revisions to this Manual
Rev Issue Date Inserted Rev Issue Date Inserted
No. Date Inserted by No. Date Inserted by
61-10-01 i
New Edition August 2003

Hoffmann Propeller
Manual No. E 0107.72A
Content
1- GENERAL........................................................................................................ 1-1
2- DESIGNATION ................................................................................................ 2-1
2-1. Designation of the Hub .............................................................................................2-1
2-2. Designation of the Blade...........................................................................................2-2
3- DESIGN DATA................................................................................................. 3-1
4- CONSTRUCTION............................................................................................. 4-1
4-1. Hub Assembly............................................................................................................4-1
4-2. Pitch Change Mechanism.........................................................................................4-1
4-2.1. HO – V62R..........................................................................................................4-1
4-2.2. HO – V62 ............................................................................................................4-5
4-3. Blade Assembly..........................................................................................................4-5
4-4. Blade Bearing.............................................................................................................4-6
4-5. Spinner Assembly......................................................................................................4-6
4-6. Counterweights..........................................................................................................4-6
5- OPERATION.................................................................................................... 5-1
5-1. Propeller Model HO – V62R....................................................................................5-2
6- INSTALLATION............................................................................................... 6-1
7- INSPECTION ................................................................................................... 7-1
7-1. Daily Inspection.........................................................................................................7-1
7-2. 100h Inspection..........................................................................................................7-2
7-3. Inspection of the blades.............................................................................................7-3
7-4. Damaged fibre glass cover........................................................................................7-6
7-5. Additional periodic inspections................................................................................7-6
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7-6. Overhaul.....................................................................................................................7-6
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Hoffmann Propeller
Manual No. E 0107.72A
7-7. Special inspections.....................................................................................................7-7
8- PROPELLER ADJUSTMENT.......................................................................... 8-1
9- MAINTENANCE AND REPAIR........................................................................ 9-1
10- SHIPPING AND STORAGE ....................................................................... 10-1
10-1. Shipping................................................................................................................10-1
10-2. Storage..................................................................................................................10-1
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Hoffmann Propeller
Manual No. E 0107.72A
List of Illustrations
Fig. 4-1 Blade in "Take Off" Position..................................................................................4-3
Fig. 4-2 Blade in "Cruise" Position.....................................................................................4-4
Fig. 4-3 Blade in "Feathered" Position.................................................................................4-4
Fig. 4-4 Blade Tipping Type A + B.....................................................................................4-5
Fig. 7-1 Normal Erosion......................................................................................................7-3
Fig. 7-2 Blade root NO cracks in the silicone.....................................................................7-3
Fig. 7-3 Erosion tipping Type A .........................................................................................7-4
Fig. 7-4 Erosion tipping Type B.........................................................................................7-4
Fig. 7-5 Fine cracks in the paint or the tipping ...................................................................7-5
Fig. 7-6 Cracks in the paint of blade...................................................................................7-5
Fig. 7-7 Hair cracks in the paint...........................................................................................7-6
Fig. 9-1 Rework Leading Edge Type B ...............................................................................9-2
Fig. 9-2 Paint damage behind Blade Tipping B..................................................................9-2
Fig. 10-1 Propeller HO - V62.............................................................................................10-2
Fig. 10-2 Propeller HO - V62R.........................................................................................10-3
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Hoffmann Propeller
Manual No. E 0107.72A
1- General
The propeller HO-V 62 () is a two bladed lightweight propeller with mechanical pitch
change device. It is equipped with a “Take Off Position” and a “Feathering Position”.
It was mainly designed and developed for the use with early generation of powered
gliders.
The propeller HO-V 62 R () is a two bladed lightweight propeller with mechanical
pitch change device. It is equipped with a “Take Off”-, a “Cruise”- and a “Feathering
Position”. It was mainly designed and developed for the use with the second
generation of powered gliders. The additional cruise position improves the flight
cruise performance of the powered glider considerable
The pitch change from the take off- to the cruising position can only be done with the
engine running. The change back from the cruising- to the take off position can be
done either with the engine running or the engine stopped.
The pitch change to the feathering position on both propellers has to be done with
the engine stopped or wind milling.
The tendency of the propeller blades of both propellers is always to return to the take
off position regardless whether the engine is running or stopped.
The propeller blades always return to the take off position if the feathering position
will fail.
In order to get the best propeller efficiency the correct blade angle adjustment is very
important, especially if the propeller blades L160BT are installed. Therefore the
instructions given by the aircraft manufacturer regarding the static RPM setting have
to be followed carefully. A higher static RPM will not automatically give better take off
and climb performance.
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Hoffmann Propeller
Manual No. E 0107.72A
2- Designation
2-1. Designation of the Hub
HO- V 6 2 () () R () / Blade Model
1 2 3 4 5 6 7 8
1. Hoffmann GmbH & Co. KG
2. Variable pitch propeller
3. Number of basic model
4. Number of blades
5. Flange type: Blank = basic model
6. Number of hub extension from blade axis to
flange, if required blank: 104 mm (4.09 inch)
7. Propeller pitch
Blank: Mechanical two position propeller
R: Additional mechanical cruise position
A: Automatic pitch change system
H: Hydro mechanical pitch change
mechanism
HS: Hydro mechanical pitch change
mechanism with feathering position
8. Minor change not affecting airworthiness /
interchangeability
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Hoffmann Propeller
Manual No. E 0107.72A
2-2. Designation of the Blade
() () 160 BT -() () () ±()
9 10 11 12 13 14 15 16
9. Sense of rotation:
blank: right hand, tractor
D: right-hand, pusher
L: left-hand, tractor
LD: left-hand, pusher
10. blank: Type “A” or “ B “ erosion shield
C: Type “ C “ erosion shield
11. Basic diameter in cm
12. Designation of blade design
13. Designation of blade twist
14. B: electrical de-icing
15. Material of blade
Blank: compreg scarfed with lighter
wood
P: compreg
16. Decrease (-) or increase (+) of basic
diameter in cm
Blade Model (example only)
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Hoffmann Propeller
Manual No. E 0107.72A
The model designation, the serial-No. and the date and number of the inspection are
written on a decal on each blade shank. The serial-No. of the blade is also stamped
into the blade butt face (not visible from outside) and the retaining ring.
The complete designation of a variable pitch propeller is a combination of the
designation of the hub assembly and the blade assembly. Both designations are
separated by a slash mark.
Example: HO-V 62 R / L 160 BT
The serial-No. of the hub is also the serial-No. of the propeller assembly
Translation
Geräte- Nr.: TCDS-No.: Part- Nr.: Part-No.:
Nabe: Hub: Werk- Nr.: Serial-No.:
Blatt: Blade: Werk- Nr.: Serial-No.
Prüfung: Inspection: Datum: Date:
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Hoffmann Propeller
Manual No. E 0107.72A
3- Design data
Following data are only standard values and for information only. For installation
purposes only the data given in the applicable Type Certificate Data Sheet
(TCDS) No. 32.130 / 13 (latest edition) of the German Luftfahrt-Bundesamt
(LBA) are valid.
P max 75 kW (dependent on propeller diameter and
rpm)
n max 3600 1/min (dependent on diameter and
power)
Number of blades: 2
Diameter max: 170 cm
Pitch change range: about 75 deg
Weight: HO-V62 (Ø 170 cm)
HO-V62R (Ø 170 cm) about 9.0 kg (20 lbs) about 10.0 kg (22.0 lbs)
Weight of the spinner: about 1.0 kg (2.2 lbs)
Polar moment of inertia: about 0.5 kgm2
Mounting flange: 80 mm diameter bolt circle,
6 studs 7/16 - 20 UNF,
center bore 47 mm diameter
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