Truck has power functions steering + forward & reverse, trailer so far has a compressor with pneumatic legs. Still to add a pneumatic tail lift and/or trailer door openers.
Feel free to leave comments.....
About this creation
Under trailer doors open to reveal battery pack powering the compressor for the trailer legs, similar doors are located both sides.
Rear trailer doors open to reveal a fold down ramp, vertical door bars will be grey to colour match the cabs bars.
Mini figures give you an idea of the size. The trailer measures 20x96 studs and the truck measures 16x60 studs, the overal length with the trailer attached and the ramp down is well over 200 studs.
I have added a ramp at the rear of the trailer and will eventually have this pneumatically powered by the trailers in-built compressor.
The cab tips up to show the v12 engine with chrome air intakes.
The trailer as a bare chassis in development.
The truck has twin differentials with quite complex gearing, this was necessary due to the weight of the trailer which is extremely heavy. Originally the truck was powered directly from a worm gearbox, this pulled the trailers weight without problem but moved really slowly. Now the gearing has been changed to enable the truck to still pull the trailer but at a higher speed, this took some experimenting.
The trucks couping is quite simple but effective.
the trailers side door open showing the power pack and the pneumatic rams which lift the front of the trailer. The compressor cant be seen but sits to the left of the battery pack across the trailers width.
Quoting Tyler Reid
Very nice! how many drive motors did you use? I built an RC technic semi in about the same scale. drained batteries like nothing so I built a smaller, more efficient one
One XL motor on the rig with a worm gear to cope with the weight, in addition ive added a geared down medium motor to the trailer which connects via an extension lead to the rigs receiver. As you say it does drain batteries so ive now used rechargable ones. I see Lego have bought out a rechargable Power Function battery box (not cheap though). Ive also just fitted out all the interior cab controls and a sleeping compartent, ill try and post the pictures along with some videos soon.