Subject:
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Re: hoovercraft with lift, thrust and steering
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Newsgroups:
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lugnet.technic
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Date:
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Wed, 5 Mar 2003 07:51:57 GMT
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Viewed:
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1894 times
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"Paul Krieg" <pdkrieg@epix.net> wrote in message news:HB9KH9.8H1@lugnet.com...
> Well, my rotor blades are a bit big (about 12 x 36 L).
oh G! :)
what motor will rotate it?
it has to create much resistance on the air
> They are made this way to save weight as
> your hoover craft is
but it could cause the hovercraft will rotate instead of propeller :)))
(joke)
> > 2. the problem of exploding rotor still stays
> One way of preventing friction pins from coming loose at high rpm's is to put a
> small antenna or pneumatic "T" etc. in the holes so it can't contract.
where was my brain when i've been thinking of it?
i've got some flex sys parts and some years ago i tried this app
when you said that some contact sparkle in my head and now i see this old design
off-topic:
i'm excited very much how human memory works
eof
now it's your idea! (for me)
> > this application is really for plane wings
> > not for propellers
> > cause they have more sofisticated profile :(
> I would think they are all similar.
not really
the wing has to create maximum lift (at sane speed of air :)
the propeller's rpm is normaly really high so the air flow is speed
and in fact propeller suck and press the air
but wings just create the lift force (aerodynamic lift)
so they are different at all
(probably someone will send us link to howstuffworks :)
> I am far from being
> an engineer, though.
me neither
> I've enjoyed your stuff
thanx
> and many others very much.
yeah!!! we have such great builders here
regards
pixel
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Message has 2 Replies:
 | | Re: hoovercraft with lift, thrust and steering
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| (...) I may sound silly. Since you ask... I am trying to build a helicopter that will be powered by a pneumatic engine. That is way it needs to be large. I was stumped at how to make the rotor wings untill I saw your hovercraft. I made a couple test (...) (22 years ago, 5-Mar-03, to lugnet.technic)
| | | Re: hoovercraft with lift, thrust and steering
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| "pixel" <pixsrv@poczta.onet.pl> wrote in message news:HB9n89.DzD@lugnet.com... (...) news:HB9KH9.8H1@lugnet.com... (...) With those big blades you do not need the high speed to get lift, so you can use a geared down motor for this I think? But that (...) (22 years ago, 5-Mar-03, to lugnet.technic)
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Message is in Reply To:
| | Re: hoovercraft with lift, thrust and steering
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| (...) Well, my rotor blades are a bit big (about 12 x 36 L). They do not have the profile of an actual airplane wing. They are made this way to save weight as your hoover craft is. I did not use any flex tube at this time. (...) I am considering two (...) (22 years ago, 5-Mar-03, to lugnet.technic)
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