jack ernst, e-mail, 25.08.2014 05:51 I was flight eng on the XV-1 and flew several flights with J Knoll. It was an interesting program and G E wanted to install a turbine in the aircraft at the end of the army evaluation, but Mc Donnell had too much other business and decided too abandon the project.

Leo Rudnicki, e-mail, 19.06.2009 00:09 I believe that combining a helicopter with an airplane has been researched extensively and a helicopter with wings and thrust isn't as good as a helicopter for the vertical functions. An aircraft with a helicopter attached isn't as effective as an airplane on the horizontal plane. Tilting the engines on Osprey and the Augusta project are coming to fruition only at TREMENDOUS research, development and construction costs, with a few lost lives as well. Making complicated stuff reliable is a long uphill road. And there is NO shortcut. There have been thrust jets on helicopters with stub wings. Where are they now?

Chris Belton, e-mail, 18.06.2009 20:44 Could this concept be developed further using a conventional helicopter as the basis.As I understand, helicopters are also fuel intensive and maintenance intensive with the quite frequent replacement of rotor blades and the wear in the rotor hubs and gearboxes. If a conventional helicopter with an efficient modern turbine could convert to using wings and the engine convert to driving an efficient propeller for high speed long range cruising,and the rotor blades set to windmill in a flat/feathered minimum drag pitch,would this not save fuel and reduce expensive wear on the conventional helicoper lift surfaces and machanicals? This configuration might retain most of the advantages of a helicopters flight characteristics when needed and also extend the range and reduce operating costs.the combined advantages of combined helicopter and fixed wing flight in the same aircraft could have enormous advantages to my mind,particularly in getting to a search and rescue scene more quickly for example.

John F White, e-mail, 07.12.2007 20:29 This concept should be developed---

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