Subject:
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Re: Airplane wing
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Newsgroups:
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lugnet.technic
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Date:
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Wed, 16 Apr 2003 18:31:55 GMT
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Reply-To:
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Øyvind Steinnes <PHOENIX@saynotospamONLINE.NO>
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Viewed:
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913 times
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"Tobbe Arnesson" <StPnAtM@lotek.nu> wrote in message
news:HDFx7y.1Do1@lugnet.com...
> > More pictures will be seen after moderation at:
> > http://www.brickshelf.com/cgi-bin/gallery.cgi?f=40187
>
> Good work mate!
Thanx.
> The shape of the wing is really good!
Actually the second wing has a eveb better wingshape.
I've not tried that one outside yet, but it is lighter and has bigger
wingspan.
Its 180cm and 520grams.
Planing on making a third version with dual wings, one on top of the other
like the Wright brothers airplane (is that called biplane??). It is easyer
to make an light wing with enough stiffnes to it with that construction and
with the material I have to make it off.
> Perhaps if you could make the two wing halves attach at a slight degree • giving
> a V-shape to the wing. Or at least make the tips turn up. I'm not sure why • but
> most sailplanes have this configuration and that's all you need to know • right
> now :)
Reason for the small V-shape seen from the front on the wings of an
airplane, is stability. And I got a natural U shape of the wing since it
bends uppwards on the wingtips in flight.
> Perhaps you can make the wing lighter by using plates to extend the 1 x 16
> beams instead of friction pins?
> I.e.:
> beam-plate on top-beam-plate on top-beam
> Or rather in the bottom since the forces work that way.
> If you find a way to streatch the plastic film it will help streanghtening • the
> wing.
Actually I tried that metod, but I need strength in all three axis of the
wing since the technic axles ar not strong enoug themselves to hold the wing
stiff. Even when I apply the film the axles are too week to hold the wing
togheter in all directions.
Some has mentioned that I should remove the techinc axles in the back of the
wing, because the film would form itself in the back. But actually they are
not there for the plastic film at all, they are there because the wing would
bend backwards in flight if they wasn't there :)
LEGO is of plastic, and that ABS plastic is not too stiff. Actually it is
very soft and bend easy when you have that length of it. Remember this is a
180cm long wing! Just ask the guys that are making big cranes how much the
LEGO bricks bends :)
What I need is a H shaped beam (or more like an I shape if you have TimesNew
Roman font). It is a bit hard to see on the photos how I made the middle
beam of the wing, but the 1x16 technic brick joined together in the end,
with two technic pins is been overlaped by the same type of structure on top
with two 2x3 plates between, locked together with the Quarter Oval 3x5
Lshaped Technic Liftarm in front of the wing..
Have to put that in the Ldraw file I've made to show how its realy made...
But I've got an hard time making a stiff, long and light structure for the
body of the plane, first one was light but bended so much that the rear
wings had no effect :)
And I'm open for sugestions....
A crazy idea pops up to my mind; making a "flying wing" airplane of LEGO?
Then ALL the body of the airplane is contributing to the lift?
But that is a hard one to make.... (not imposible, but a bit difficult)
Regards
Øyvind Steinnes
http://www.brickshelf.com/cgi-bin/gallery.cgi?m=Phoenix
>
> Good luck!
>
> Best regards,
> /Tobbe
> http://www.lotek.nu
> (remove SPAM when e-mailing)
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Message has 2 Replies:
 | | Re: Airplane wing
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| "Øyvind Steinnes" <senniets@online.no> wrote in message news:HDG8pC.FwF@lugnet.com... you were not answer my suggestions so maybe my post gone :)) did you try to use string to make it more stiff your idea of front shape is really good br pixel (21 years ago, 16-Apr-03, to lugnet.technic)
| | | Re: Airplane wing
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| (...) Interesting. (...) Biplane, yes. Or triplane if you have three wings, like the Red Baron (which essentially have four counting the one in the landing gear). (...) Ah, yes! (...) Bummer! (...) What about using string as Pixel suggests? Then you (...) (21 years ago, 17-Apr-03, to lugnet.technic)
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Message is in Reply To:
| | Re: Airplane wing
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| (...) The shape of the wing is really good! Perhaps if you could make the two wing halves attach at a slight degree giving a V-shape to the wing. Or at least make the tips turn up. I'm not sure why but most sailplanes have this configuration and (...) (21 years ago, 16-Apr-03, to lugnet.technic)
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