Dornier P 406
The Dornier P 406 was a project draft by the manufacturer Dornier for a crane helicopter with a capacity for external loads of up to 40 tons, the requirements of which the BMVg had published in the early 1960s. The project was discontinued when the BMVg dropped the demand. Among the same demands z. B. the United Flugtechnischen Werke (VFW) to license the construction of the Sikorsky S-64 crane helicopter .
description
It was a helicopter with the typical contours like the S 64 crane helicopter. In the Dornier design, the long-legged landing gear was covered with large stabilization surfaces that were used to stabilize in high-speed flight.
The rotor followed the blade tip drive that had already been tried and tested on the Dornier Do 32 , with the advantage that no tail rotor or counter-rotating rotor is required, as this reaction drive does not generate any counter-torque. No shafts, gears, clutches or freewheels are required. The lower weight of the dynamic system resulted in a very favorable load ratio.
Contrary to the Do 32 principle, the hot gas drive tested in the Do 132 project was provided here. The drive was to be provided by three turbines with 18,000 hp each, whose thrust gases were passed through the heat-insulated hollow rotor mast, via the rotor head and the heat-insulated rotor blades to the thrust nozzles on the blade tips, so that they should be converted into thrust without major losses at the blade tip nozzles. A smaller, disguised tail fan was also provided for stabilization / yaw control in hover when lifting loads. Overall, the helicopter would have had a maximum take-off weight of over 80 tons dead weight and payload.
Standard containers should be held within the chassis or external loads suspended from a rope should be able to be attached.
Technical specifications
| Parameter | Data |
|---|---|
| Rotor diameter | 41.7 m, 3 rotor blades |
| drive | 3 × turbines with 18,000 hp each |
| payload | 40,000 kg |
| Takeoff weight | Over 80 tons |
literature
- Kyrill von Gersdorff, Kurt Knobling, Carl Bode: helicopter and gyrocopter . Bernard & Graefe Verlag, 1999, ISBN 3-7637-6115-2 , p. 150.