The propeller is – together with the engine – one the major components of an aircraft. Its characteristics considerably affect performance and noise. Only, if the propeller is individually adapted to the aircraft, the optimum efficiency is achieved. Hoffmann Propeller guarantee such a customer work taking into consideration all requirements.
Hoffmann Propeller manufacture 2-5 bladed propellers in wooden composite construction with fixed pitch, ground adjustable but mostly variable pitch, hydraulically or mechanically controlled with optional provisions for reverse thrust and feathering up to an input power of 400 kW and a maximum diameter of 4 m. Great importance is attached to low noise operation. Of course, propeller range also includes propellers for unmanned vehicles (UAV).
The great advantage of the wooden composite construction is that each blade – even single units – can be manufactured individually, as no moulds or castings are required. The low weight of the material adds to the performance benefits of this design. At Hoffmann, every product is professionally built to the highest aviation standards, with safety, performance, affordability, and service as top priorities.
The propeller HO-V 62() is a two bladed lightweight propeller with mechanical pitch change device. The hub is made from forged aluminium alloy and the blades are wood-composite with FRP-covering and leading edge guard.
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 62R() 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 following data are only standard values. For installation purposes only the data given in the applicable Type Certificate Data Sheet (TCDS) No. 32.130 / 13 of the German Luftfahrt - Bundesamt (LBA) are valid.
Type certifications: FAA - P7EU.
The propeller HO-V 123() is a three bladed single acting fully hydraulically controlled constant speed propeller. The hub is made from forged aluminium alloy to fit to the Lycoming, Teledyne engines, but different flanges are also available. The blades are wood - composite with FRP-covering and leading edge guard.
The pre-selected propeller RPM will be kept constant in the normal operating range by a propeller governor. This propeller uses oil pressure to increase pitch. The travel of the propeller blades is limited by mechanical stops.
In the event of an oil pressure failure the propeller blades automatically return to the low pitch stop and the propeller can be used as a fixed pitch unit. The propeller RPM has to be adjusted and controlled by the throttle only, but the flight may be continued.
For special applications the propeller uses oil pressure to decrease pitch. In this case counterweights have to be used to turn the propeller blades towards coarse pitch. In the event of oil pressure failure the propeller blades automatically go to the high pitch or feathering stop.
The following data are only standard values. For installation purposes only the data given in the applicable Type Certificate Data Sheet (TCDS) No. 32.130 / 17 of the German Luftfahrt - Bundesamt (LBA) are valid.
Type certifications: FAA - P5EU
The propeller HO-V 352() is a two bladed single
acting fully hydraulically controlled constant speed propeller. The hub is made from forged aluminium alloy to fit to the Rotax 912() and 914() engine, but different flanges are also available. The blades are wood-composite with FRP-covering and leading edge guard.
The pre-selected propeller RPM will be kept constant in the normal operating range by a propeller governor. This propeller uses oil pressure to increase pitch. The pitch change range of the propeller blades is limited by mechanical stops.
In the event of an oil pressure failure the propeller blades automatically return to the low pitch stop and the propeller can be used as a fixed pitch unit.
The propeller RPM has to be adjusted and controlled by the throttle only, but the flight may be continued.
The following data are only standard values. For installation purposes only the data given in the applicable Type Certificate Data Sheet (TCDS) No. 32.130 / 88 of the German Luftfahrt - Bundesamt (LBA) are valid.
Type certifications: FAA-TP5BO, TC-P-8, DGAC-H-IM 4, RCAA-EL-04 /1996
The HO-V723( ) propeller is a three bladed single acting fully hydraulically controlled “constant speed” propeller. The hub is made from forged aluminum alloy to fit to the Rotax 912( ) to 916( ) engines.
Different flanges are also available. The blades are ”wood-composite” with FRP-covering and
leading edge guard. In the normal operating range, the pre-selected propeller RPM is
maintained constant by a propeller governor. This propeller uses oil pressure to increase pitch. The travel of the propeller blades is limited by mechanical stops.
In the event of an oil pressure failure the propeller blades automatically return to the “low pitch” stop and the propeller can be used as a ”fixed-
pitch” unit. The propeller RPM must be adjusted and controlled by the throttle only, but the flight may be continued.
For special applications the propeller uses oil pressure to reduce pitch. In this case counterweights must be used to turn the propeller blades towards high pitch. In the event of oil pressure failure, the propeller blades
automatically move to the mechanical “high pitch” stop.
The pre -selected propeller RPM will be kept constant in the normal operating range by a propeller governor. This propeller uses oil pressure to decrease pitch and counterweights as well as the spring force to increase the pitch until
“feathering”. In the event of oil pressure failure, the propeller blades automatically move to the “feathering” position.
The mentioned data are only standard values.
With over 65 years of experience in the design and manufacture of fixed-pitch wooden propellers, we have developed solutions for a wide range of applications. Whether historic aircraft, wind tunnels or tunnel ventilation systems, drones, motor gliders or light sport aircraft (LSA) - the HO series offers a cost-effective, low-vibration and ecological wooden propeller everywhere.
We manufacture 2- or 4-blade propellers, with or without leading edge fittings, in a nostalgic vintage look with differently stained blades and clear varnish, as well as with fiberglass sheathing, in diameters from 50 cm to 250 cm.
Numerous variants are possible, as our manufactory is prepared to meet customer-specific requirements. Our paint shop is also equipped for customer-specific paintwork and will be pleased to advise you.
In addition to our experienced production facility, we alsocarry out propeller overhauls and repairs.
Are you interested in one of our propeller solutions or do you want to get further information about propeller details or pricing? Please get in contact with us.
Manager Sales & Service