Subject:
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Re: 1:20 scale Apache Helicopter
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Newsgroups:
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lugnet.technic
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Date:
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Sat, 22 Oct 2005 17:37:04 GMT
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Viewed:
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8592 times
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On 22/10/05, Mark Bellis <mark.bellis@tiscali.co.uk> wrote:
> Here's my MOC of an Apache helicopter, built to 1:20 scale, compatible with
> Technic figures. http://www.brickshelf.com/cgi-bin/gallery.cgi?i=1437017
>
> It features the first ever fully working Lego helicopter rotor with collective
> and differential rotor blade pitch control.
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=1437013 The rotor blades are
> connected up to the joysticks and collective pitch levers.
>
> The tail rotor has collective pitch control made from plates with clips.
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=1437015
>
> The model is not quite finished but these pictures show some of the inside
> workings. The swivelling front camera, rocket launchers and missiles are all
> there. I haven't finalised the full length rotor blades yet, but the trial
> ones
> drooped a bit as their length means they almost touch the tail.
>
> Both the main rotor and tail rotor use the swash plates supplied with 8856
> helicopters. The collective and differential pitch control adds the two
> signals
> together in the rotor tower using levers. I modded a few bits so that the
> crank
> mechanisms would fit in the bottom of the tower. I think these include my
> shortened axle pins (cut the pin off one leaving an axle and a bezel with the
> total length being 8mm).
>
> I had intended to put two 12V train motors behind the main rotor, since it
> needs
> a lot of power to turn it, but the new RC car motors should do just as well
> once
> I have enough of them.
>
> I used black in the absence of enough cammo coloured bricks. The parts I used
> for the undercarriage are fatter than scale because of the weight. I knew
> axles
> wouldn't be strong enough so I had to use beams. I might change these for
> studless ones later, to reduce he profile.
>
> PLMKWYT
>
> Mark
Nice. I would love to see a close up of the rotor gimbal. I cant wait
to see it completed.
I find myself wandering about the best way (if any) to get a rotor
blade with a proper wing like structure in Lego.
Something using the 1x1 with a tooth, snot techniques and then some
paper might get somewhere close - a small frame with paper "skin".
Sure introducing paper is not purist, but I am not sure what else I
can think of.
Danny
--
http://orionrobots.co.uk - Build Robots
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