Bad Piggies Tusk ‘Til Dawn Level 5-1 can be 3-starred using a single contraption, though two runs may be necessary. Build a simple cart four blocks long, with the powered wheel on the right side. To get proper speed for the loop, quickly toggle the engine off-and-on once. Good luck avoiding Red Bird!
If you have a different strategy for completing this level feel free to leave a comment below.
You might want to fix the description. It’s not a single contraption. Cart in first run can NOT get top star. I tried it 100x before I noticed the power wheel was moved to the left side for run #2. :)