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Questions tagged [tiltrotor]

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What are the effective span and lifting properties of a circular wing?

Today I read an article on FlightGlobal about the Bell air taxi demonstrator. It includes some paraphrased quotes from the Bell VP of innovation, Scott Drennan, among which the following stood out: ...
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1answer
109 views

How to calculate the power required during transition from VTOL to fixed wing?

In a VTOL, I have calculated the power required for take off and cruise which was not difficult at all. Between take off and cruise, there is a phase where the VTOL has to transition by tilting the ...
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2answers
134 views

Disadvantages of using thrust vectoring only in an aircraft with variable rotation nacelles such as the X-19

Take a quad tilt rotor aircraft such as the curtiss-wright X-19 or even a bi-tilt aircraft such as the V-22. What would be the advantages or disadvantages of using thrust vectoring only for control ...
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1answer
218 views

How much do the blades on the V22 or AW609 weigh?

It seems that the blades on the V22 or AW609 would have to be heavier than conventional helicopter rotor blades since they have to be substantially stiffer when in fixed-wing mode. Normal helicopter ...
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3answers
236 views

Can a Stewart Platform be used instead of a swash-plate assembly in a helicopter? What are the pros and cons? [closed]

https://en.wikipedia.org/wiki/Stewart_platform Also, are there any helicopters in service that use this mechanism? I was thinking along the lines of using it instead of the part of the swashplate ...
2
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1answer
2k views

what are the advantages and disadvantages of tilt rotor vs ducted jet engine for a VTOL aircraft?

Please could someone summarize the main advantages and disadvantages of a tilt-rotor (the V22 Osprey) vs jet (F35) system for VTOL. I have been trying to look into this but found details very sparse ...
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2answers
991 views

What is the difference between Tilt-rotor aircraft and Tilt-wing aircraft?

I've heard more about tilt-rotor aircraft like the Bell Boeing V-22 Osprey more than a tilt-wing aircraft like the XC-142 What are the differences (other than one changing the degree of wing or ...
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4answers
1k views

Why aren't contra-rotors used on the V-22 Osprey?

The Osprey has 38 ft (11.6 m) rotors in a rotating nacelle on each wing. The rotors are powered via a gearbox as in usual turbo-pro fashion. Is any reason that is obvious that smaller contra-rotating ...
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3answers
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How does the V-22 Osprey share engine power between its rotors?

I learned through a comment on this question about multiple engines powering a single propeller that the V-22 Osprey can power both rotors from a single engine, or use both engines to power a single ...
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2answers
877 views

Could a tilt quadcopter use turbofan engines?

I was wondering whether having a quad tiltrotor would allow for the use of turbofan engine rather than turbo prop. I read on another question that the V-22 uses turbo prop as it is easier to balance, ...
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1answer
434 views

Why does the NASA GL-10 Greased Lightning run on diesel?

I've been reading about NASA's experimental GL-10 Greased Lightning tilt-wing aircraft with interest. My understanding is that this is a diesel-electric hybrid aircraft uses stored electrical energy ...
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1answer
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How do the cockpit controls of a tiltrotor aircraft work?

I'm having trouble trying to imagine the primary flight controls in the cockpit of a tiltrotor aircraft - how would one design it? In an airplane, turning the wheel to the left would always deflect ...