very short take off!

[quadrirotor]

deleted...

[Victor Duarte]

why ??????????

[quadrirotor]

OK, go there and watch the magni take off on the right!....
http://www.autogire.com/

[Victor Duarte]

wow, full brakes, full prop, a good 914, wind and ..yeepee !
why do we need helicopters ?

[quadrirotor]

Right, a good prerotator is essential!!!!!

[Victor Duarte]

Originally Posted by quadrirotor

Right, a good prerotator is essential!!!!!

is the idea of a small compressor still in the air?
you know, i designed my rotor, first, for a tip jet... i could recall some sketches... even if it doesnt work, should be re usable in a gyro..

just have a look :

http://zeeoo.free.fr/helico/tip-jet-blade.jpg

[quadrirotor]

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]

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

some find good improvements searching wavy ways :

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

[quadrirotor]

Gears ok for prerotator!

[Victor Duarte]

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

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.

[quadrirotor]

What do you think of the ultimate solution:
http://www.rotaryforum.com/forum/sho...8110#post28110

[rehler]

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

[Victor Duarte]

right Ken !
also check
http://perso.club-internet.fr/rvtpan...uteur_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]

Ok, Zeeoo you are right, you are mad! (just a joke! )

[Victor Duarte]

lol i read it like this andré, dont worry !

"l'indulgence est la politesse des braves" aucun rapport mais ca sonne bien !

ps : i posted a drawing for canard