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Tezza
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  Sujet n°14  -  posté le 17/11/2006 @ 12:36

Bonjour

Sorry but that is almost the full extent of my French.I am hoping that all my European friends are more educated than me, and can understand English.

My intention is to build the Tornado using a Villiers 3T 325cc two stroke twin engine. This engine is my choice because I have had it in my shed for about 10 years. It is brand new and has never been run yet. My concern is that it may not be powerfull enough for the craft. The rated horsepower is 18hp. I am considering running a multiblade fan directly from the crankshaft.

I would apreciate any advise which anyone can give

Merci bien

 

 


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Pascall
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  Réponse n°41  -  postée le 12/09/2011 @ 23:03 Haut
Hi,

Letter A it,s not for distance betwen duct et blade.

But distance betwen duct and part to take air cushion.

Before change duct or blade rpm, try to running with your configuration.

How many millimeter for letter A?
And after, we looking about diameter of holes from bag skirt.

@+
pascall

Jan
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  Réponse n°42  -  postée le 13/09/2011 @ 07:04 Haut

OK- understand wit A

So in my hover distance A= 80 mm

Holes in my bag are according to project of Tornado PointDu.

Janek biggrin

ryder_35
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  Réponse n°43  -  postée le 13/09/2011 @ 11:47 Haut
80 mm ?????
C'est beaucoup trop.

il faut 10mm et ça fonctionnera beaucoup mieux.

pascall

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  Réponse n°44  -  postée le 13/09/2011 @ 12:11 Haut
Une autre question de janek:

I tried to fly many time- each time the same result, thrust is weak.

May be here is problem( see attached photo) ??

janek @ biggrin



jan-tunel.JPG

pascall

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  Réponse n°45  -  postée le 13/09/2011 @ 12:26 Haut
hello janek,

Fisrt resolve your 80mm -> "<10mm" for distance to letter A.

For your trust, use your craft with a good air cusion, do learn how drive with your body your craft.
low trust it's not a problem if your are a good air cushion.
low trust it's better to novice driver.

Yes for Air flow, your duct it's not the perfect things, but where are many other things who stop the air flow!!!, so....

@+
pascall

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