very short take off!

quadrirotor

André MARTIN
Joined
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Québec, Canada
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airplane, trike, gyro, paramotor...
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The DE LAVAL is not bad neither...to use the exhaust gas to feed the machine which has not to be on the rotor...a sketch Victor?
- the wheel inside a tube or a case ( like the torque converter...)
- less noise, no torque...
- less efficient then a turbine but... so what?
 

Victor Duarte

troublemaker
Joined
Aug 25, 2004
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43 35 14 N 02 44 46 E
so what ? why not ? mmm but a De laval can spin VERY fast (20 000 rpm) ... how convert torque without grears ? dont see enough to draw ;) but if you see, i ll draw it.

in my file "mad ideas" i have : if an airfoil works essentially by "sucking" the air at the top side... why not to suck the air at the blade tip or the blade edge > no noise..

i said i m mad :D

some find good improvements searching wavy ways :

http://www.nasatech.com/Briefs/Feb04/LAR16084.html
 

Victor Duarte

troublemaker
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oh sorry !!! you talk about pre-rotator okayyyy !!!
i didnt sleep enough :D

you think in ducting the exhaust gases to a "de laval" mounted on the plate... would be simpler to use a pneumatic tool to pre-rotate (i dont tell the dirt !!)

well if i had to think to a pre rotator, it would be accordingly to my rotor design :
3 bladed hingeless, in-mast cyclic controls, in my tractive design (engine is behind pilot)
i can use the shaft to pre-rotate rotor by a flexible acting on a crown or pulley
maybe a small turbo to blow air ;) with a deflecting vane engine/rotor.
 

rehler

Gold Member
Joined
Oct 30, 2003
Messages
750
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New Braunfels, Texas
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Custom Gyrocopter
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What a great web site - http://www.autogire.com/

Vance, go to this site, click on GALERIE PHOTO !, then Prototypes et divers page 1, then click on the 3E photo. Yes, a motorcycle gyro!

For those of you who want a big gas tank, check out photo 1G
 
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Victor Duarte

troublemaker
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right Ken !
also check
http://perso.club-internet.fr/rvtpanet/Articles/Gyro_sauteur_Brun/Gyro_sauteur_Brun.htm

a "hopper"

andré, i replied to you, i still thinking
you have good arguments for tilted rotor no doubt.
if i was to go on gyro, id better begin by buying a used bensen-like, of french guepard and fit it... sounds possible for about 3-6000 eur.
theres a great probability i ll begin this way befor begin to build my own helico/gyro.
 

quadrirotor

André MARTIN
Joined
Oct 30, 2003
Messages
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Location
Québec, Canada
Aircraft
airplane, trike, gyro, paramotor...
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Ok, Zeeoo you are right, you are mad! :D (just a joke! :) )
 
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Vance

Gyroplane CFI
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Oct 30, 2003
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Nipomo,California
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Givens Predator
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Thank you Ken. I have a feeling that it isn't balanced just right.
I didn't know you were known the world over for your expertese in autogyro design. Thank You for being my friend, Vance
 

birdy

Newbie
Joined
Mar 19, 2004
Messages
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Location
Alice Springs-central Oz.
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open frame single seat & a 'wasa' RAF, among other types.
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&^#^%$#^&*
I can't git the short TO thing to work.Wot am I miss'n,anything special?
 
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