This is a dirt bike carrier I designed and built out of steel for my FWD sedan. It tilts for loading and unloading, and features a spring-loaded rotary latch to facilitate raising up to the travel position.
Andrei "tongue weight" doesn't really apply since I did not use a trailer hitch receiver. In the video at the 19 second point you can see the adaptor I designed and fabricated, and the attachment to the frame with a bolt on the right is clear. What is not clear is that further towards the back of the car the adaptor is welded to the bumper bracket on both sides. This is far stronger than any hitch receiver you could buy for this car, probably because the car has very little towing capacity. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-o25MfIF8QvA.html
@@5tr41ghtGuy Thanks for the details John - much appreciated. I did noticed those good changes, I just wasn't sure about the details ;) - still I wanted to check if you were ever concerned the frame might not hold (I heard some people talk like nagging midwives, but personally I don't think the car engineers were that reckless to make the frame at the limit - I bet they have a hefty safety factor built into them). Does the BOLT cross all the way through the frame in the trunk? Did you add anything more than a washer, like a wider/thick metal plate to make sure that it sits on a firm surface? I am actually planning a very similar mounting system and I want to build a parallelogram lift (it has two rails like forks in the corners, when undone the forks sit near the ground and the bike is away from the trunk. The parallelogram folds towards the front and as it folds, the forks are closing in, lifting the bike up and tucking it close to the trunk. I want to use a ViaAir compressor and air pistons for the lift - if that compressor is powerful for air suspensions, I bet it can take care of a motorcycle lift).
@@cubul32 the bolt you can see attaching to the frame actually threads into a piece of 1/4" plate which I drilled and tapped, then slipped into frame through one of the existing large holes. It is like a nut only I made it as large as I could and still slip it into the frame. To avoid overstressing the frame, make sure and attach each side at two separate places which are spread apart as far as practical. The point near the back will be stressed in tension, while the point towards the front will be in compression. If you were to attach at only one point on each side, then there would be a very large bending moment which would likely bend the stiffeners that we are calling the "frame". Best of luck to you!
@@5tr41ghtGuy Yup! Exactly. I'm thinking of extending some "arms" of square tubing as far back and as far front as I can to reduce the stress and compression; I like how you used the bumper's structural piece - I'm def using that :D . I have to do some physics calculations but I'm building it very solid, spreading over as much area, using thicker plates if needed, welding stuff and whatnot.
