Video Presentation

Context and specs

In 2012, the French company StageMaster SAS contacted me to build a replica of a Folding Stage Trailer for exhibition purpose. The requirements was to have the motorized trailer for its transformation, and manual functions for the truck. I have never published instructions on it as it was only produced at one unit. But after some demands, I finished the 3D model I have to make it usable and generate the partlist. Here are the specs :

• Scale : 1/20, Dimensions 72 x 14 x 25cm folded; 72 x 40 x 40 unfolded (with truck)
• 4 pneumatic stabilizers + Manual feet
• Right and Left panel folding with a M motor (worm screw gearing with clutch)
• Upper panels folding with a M motor (worm screw gearing with clutch)
• Raising roof with dual string-driven telescopic actuator (M motor with worm screw on winch)
• Steering on the Truck with Hand Of God, no fake engine, no drivetrain
• Simple fifth wheel (hole)

If you want to dig into details, there is a long blogpost available to see the design process with work in progress pictures and video.

How to build ?

You need the parts and the instructions. Unfortunately this model has not a proper PDF building instructions as usual. But I release the 3D model for free and a 3D Web Viewer Instructions with rough step. So you can see how it is made, use as reference, modify it etc. The build is quite old now but the mechanism principles are still relevant and the design of the truck is very cost effective for its size (I recommend to swap rear tires (49.6 x 28) by narrower versions (49.6 x 20 with 56145 rims). You will need 2x50cm string, and 64cm (80l) hose that you can source alternatively here. You can check the bill of material on Rebrickable as well as commenting if needed.

About this product

Instructions Preview

No instructions preview in pictures but you can test here a sample instructions using the 3D Web Viewer Instructions :