Instructables (MUSHU)
This yacht design and 3D printed files have been downloaded from Instructables. It goes very well and was designed to work with a B-rig from a DF65. I sail it with an A-rig. Huge thank you to the original designer for supplying such a lovely design.
I have made some variations on this design and am still developing ideas. The original swept-backed wheels allowed the two axles to act as back stays, but I found that it was better to go for a single backstay like a DF65.
Straightening the wheels required shorter axles and it decreased the length of the yacht from 700mm to approx 650mm. I had to shorten the axles to stay within the 500mm width.
PS: the front bar needs to have a channel support for stiffness otherwise the forestay tension bends it too much. Leave the axles as original 10mm x 3mm aluminium to act as suspension.
NOTE: Rules allow for the rear backstay extension to be outside the overall length rule.
Original design: https://www.instructables.com/3D-Printed-Folding-RC-Land-Yacht-MUSHU/
Updated files that i used can be found here. Look for V6 Mushi files
The steering arm connector from 3mm threaded rod to tig welding stick.
The back stay extension port added to the 3D design
Model aircraft wheels from ali express adapted to the instructable hubs. The larger 4 inch wheels work well as they don’t need cutting, but I prefer the 3.5 inch https://www.aliexpress.com/item/1005007683059585.html?spm=a2g0o.order_list.order_list_main.4.3f351802Zy98nO Small wheels have to be cut with a circle cutter to fit. Try to get this right or the wheels take on a wobbly look… haha..
UPDATE: New hub file available that fits these wheels without any cutting. Just smash the original plastic out and glue these in… Suits 80mm and smaller aircraft foam wheels.
3D printed extra long winch arm and simple push button switch.
https://www.jaycar.com.au/spst-pushbutton-black-actuator-latching/p/SP0718