wpasman

If you have OSX the LDD manager won't work (PC only according to doc). But I 'm pretty sure you can do the same with a simple shell script like ran on the LXFML file inside the lxf, eg: grep \<Part IMAGE100.LXFML which gives you all parts, eg <Part refID="0" designID="32523" materials="21"> <Part refID="1" designID="3023" materials="21"> <Part refID="2" designID="3023" materials="21"> <Part refID="3" designID="3021" materials="1">

It might be nice to make a part that enables you to create a real helicopter rotor head. The only lego rotor head that I'm aware of only allows a collective pitch control, but not roll and pitch control. Basically I think what is needed is a ball with a hole drilled through and two rings that stick together but can rotate with respect to each other, clamped around the ball. The two rings would have to have some connector pins where you can connect the rest of the head assembly. It would be very cool if this lego heli could really fly, but that seems a step too far considering the lego parts weight, motor power and lego part strength. BTW the hole in the ball should be wide enough to slide over an axle but the ball does not have to rotate. EDIT: I just discovered that this part already exists, as part of set 8412-nighthawk :)