Sikorsky high-speed rotorcraft studies

[flateric]

1991 Sikorsky high-speed rotorcraft studies

 

[Sentinel Chicken]

Re: 1991 Sikorsky high-speed rotorcraft studies

What does VDTR stand for?

 

[flateric]

Re: 1991 Sikorsky high-speed rotorcraft studies

VDTR - variable diameter tilt-rotor

 

[Sentinel Chicken]

Re: 1991 Sikorsky high-speed rotorcraft studies

Ahhhh! Looking at the picture that makes a helluva lot more sense! Thanks! Was the VDTR concept a proprietary Sikorsky concept?

 

[Matej]

Re: 1991 Sikorsky high-speed rotorcraft studies

A lot of info and more designs from Sikorsky and Bell are in APR volume 5 no 5, pg. 30 - 37. They are from NASA papers.

 

[yasotay]

Re: 1991 Sikorsky high-speed rotorcraft studies

A lot of info and more designs from Sikorsky and Bell are in APR volume 5 no 5, pg. 30 - 37. They are from NASA papers.

Matej, What is APR? I would certainly like to read up on these efforts.

 

[overscan (PaulMM)]

Re: 1991 Sikorsky high-speed rotorcraft studies

http://www.up-ship.com/

V5N5 is still available.

 

[yasotay]

Re: 1991 Sikorsky high-speed rotorcraft studies

http://www.up-ship.com/

V5N5 is still available.

Thanks for the information!

 

[hesham]

Re: 1991 Sikorsky high-speed rotorcraft studies

Hi,


here is the Sikorsky high-speed rotor-craft design.


http://www.dtic.mil/dtic/tr/fulltext/u2/740771.pdf

 

[Aeroengineer1]

Re: 1991 Sikorsky high-speed rotorcraft studies

To my opinion, that's not a real project, but (as it is called in the paper) just a rotorcraft drag model,
used to test different configurations on the same basis. The addition of the mounting strut is
another evidence. Nevertheless an interesting paper !

I have to disagree with this statement. This very much looks to me like a project, though it may only be an effort that did not go very far. If this was just a standard reference model, they would have used a fuselage that was nondescript. Frequently models of this type do not have empanage surfaces. This mode has a novel empenage, windows are defined, and it is given an estimated weight class. The fact that the model is mounted on a strut is inconsequential, and in fact common for mounting a force model. I imagine the reason that this was not mounted on a sting is because the sting would have interfered with the empanage flow in a way that would negate the inverted v tail. I think that the real question is not if it is a project, but if it was ever intended a serious study for a production vehicle.

Adam

 

[hesham]

Hi.

NASA Technical Reports Server (NTRS)

ntrs.nasa.gov

 

[hesham]

Here is a very close to this concept,

https://www.semanticscholar.org/paper/W-.-o-5-Design-Optimization-of-High-Speed-Proprotor-David-Schleicher/73e43ece53ebd03051a35fb4ba845116a41d047e

 

[yasotay]

It appears with the Sikorsky HEX investigations beginning, they are once again looking at Tilt-wing with some level of seriousness.

 

[Scott Kenny]

It appears with the Sikorsky HEX investigations beginning, they are once again looking at Tilt-wing with some level of seriousness.

Well, after the ABC concept got rejected for vibration reasons (and I assume the person whose pet project was ABC finally retired), there's really only one way to go fast and take off vertically.