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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
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Message has 2 Replies:
 | | Re: 1:20 scale Apache Helicopter
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| (...) 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 (...) (19 years ago, 22-Oct-05, to lugnet.technic)
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