LEGO TECHNIC : 9215


Technic / 9215	9214 \| 9216

Subject:	helicopter not done
Newsgroups:	lugnet.technic
Date:	Mon, 10 Feb 2003 08:36:06 GMT
Viewed:	475 times

hi during weekend i've been testing many applications of propellers and the sad info is i haven't been done helicopter but here is some observations # it is (IMO) almost absolutely imposible to do chopper with propeller done with lego and witout the tunnel because the vector of the air is not directed along the spining axis so some kind of duct is needed # i tried some applications of gearing and the best was z40 to z8 with new light (28g) motor or no gearing with old 9V motor the advantage of my trials is new type of propeller 6 fixed blades but it is a little bit heavy so maybe you guys can do it lighter or so efficiency is great but still not enough :( i made even the set of 2 motors and 2 propellers in one tunnel but the frame of tunnel was heavy (and propellers were 3 blades) so still nothing post moderation http://www.brickshelf.com/cgi-bin/gallery.cgi?f=33676 deep links to propellers ver02 http://www.brickshelf.com/gallery/pixsrv/Ideas/propellers/propeller02_01.jpg http://www.brickshelf.com/gallery/pixsrv/Ideas/propellers/propeller02_02.jpg ver03 http://www.brickshelf.com/gallery/pixsrv/Ideas/propellers/propeller03_01.jpg http://www.brickshelf.com/gallery/pixsrv/Ideas/propellers/propeller03_02.jpg best regards pixel

Message has 1 Reply:

		Re: helicopter not done
I seriously think you can't use LEGO parts to make a propeller. It needs an airofoile shape, like an airplane wing. It needs to be thick towards one edge and thinn down on both sides. You can only get so efficient with just a plate. Is the (...) (22 years ago, 10-Feb-03, to lugnet.technic)

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