avatar_ChernayaAkula

AV-13 Dragonfly - a XV-15/AH-1/64/propfan mash-up

Started by ChernayaAkula, July 11, 2009, 09:15:34 PM

Previous topic - Next topic

ChernayaAkula

Found this cool beast while looking for contra-rotating props:



To me, it looks like a combination of an XV-15 and an AH-1 or AH-64, with some bits and pieces thrown on. Really like changing the big rotors for a propfan-ish arrangement. :thumbsup:

Would this type of propeller work instead of a rotor? :unsure: Looks cool any way. :wacko: Two six-bladed counter-rotating props. Wow!
Cheers,
Moritz


Must, then, my projects bend to the iron yoke of a mechanical system? Is my soaring spirit to be chained down to the snail's pace of matter?

Aircav

"Subvert and convert" By Me  :-)

"Sophistication means complication, then escallation, cancellation and finally ruination."
Sir Sydney Camm

"Men do not stop playing because they grow old, they grow old because they stop playing" - Oliver Wendell Holmes

Vertical Airscrew SIG Leader

ChernayaAkula

I'm still confused by that propeller design. The prop blades seem rather long, but would they be long enough to support a vertical lift-off? Or would at least angling up the engine nacelles shorten take-off distance?
Cheers,
Moritz


Must, then, my projects bend to the iron yoke of a mechanical system? Is my soaring spirit to be chained down to the snail's pace of matter?

Weaver

Well small props need to turn faster to generate the same thrust as large, slow ones, so if you put enough power through those props they WILL provide lift-off, but the downwash will be much more energetic. It'll be halfway between a helicopter and a Harrier, I imagine.....
"Things need not have happened to be true. Tales and dreams are the shadow-truths that will endure when mere facts are dust and ashes, and forgot."
 - Sandman: A Midsummer Night's Dream, by Neil Gaiman

"I dunno, I'm making this up as I go."
 - Indiana Jones

lancer


Ok, this is incredibly cool, awsome and sexy looking, but - there's always a but isn't there?? - I see it working better as a fixed wing machine rather that a tilt rotor. As has been stated already the props look too small to give enough thrust to lift vertically. Well, thats my two penneth anyway.
If you love, love without reservation; If you fight, fight without fear - THAT is the way of the warrior

If you go into battle knowing you will die, then you will live. If you go into battle hoping to live, then you will die

jcf


Shasper

The Propfans would work just as well as the old proters, good news is if needed to you can perform a standard rolling takeoff instead of STO or VTO. Down side is the amount of propwash being put out (A Propfan is similar to the standard high by-pass turbofan, just without the engine ducting), and the noise level.



Shas 8)
Take Care, Stay Cool & Remember to "Check-6"
- Bud S.