elbekko Posted May 15 Share Posted May 15 I've been thinking about getting a winch bumper for my P38 for a while. Nothing out there really speaks to me. Either it's ugly or ludicrously expensive. I want something that follows the stock bumper and body lines as closely as possible, and is sturdy but doesn't weigh more than the moon. I bought this winch a while back: VEVOR 13.5k winch It appears to be surprisingly decent quality. I've had the gearbox open to clock the freespool lever, and everything inside looks good. Decent grease in there too, although I'll probably replace that anyway. The only thing I might change (eventually) is the solenoid, as it's a bit too chinese to my liking. Overall, it seemed very much worth it for the price. So, onto the design. I've been battling Fusion 360, but I think I'm starting to get sort of used to it. The top, bottom and chassis plates are 5mm, the front plate is 3mm. The idea is to use S355 for some extra strength. Integrated skidplate/radiator protector which bolts to the front chassis crossmember. Winch goes feet forward, pulling force should be pretty well in line with the bolts through the chassis. Some stiffening ribs can probably be added in the side wings here and there. Fusion estimates the bumper is around 42kg like this, which I think is fairly in line with bumpers like this? Maybe a little more than I would've liked. But doesn't seem any worse than the FirstFour bumper I had on my RRC, that had its own gravitational field. The winch is modelled very roughly, but should be close enough for the purpose. My main points I'd like feedback on: * Will the 3mm front plate be enough to take the forces from the winch? Or should I maybe more go for a "cradle" of 5mm plate that is a U bent up between the chassis rails, and then skin the remainder in 3mm? * How hard will it be to bend 3mm plate around that curve? My idea is to weld and hammer, but not sure how well that'll work, especially with S355? * How do I get Fusion to give me a flat pattern for the whole front plate, including the curves? It refuses to see it as a bend, so won't put it into a DXF correctly. Worst case I need to remodel it somewhere to get it cut out. * Not sure how/where to add recovery points yet. In between the chassis plates would probably be best, but can't really decide what I want. My first thought was to extend the chassis plate through the bumper as an eye, but that's then only 5mm plate, and won't be easy to make and make look good. Feedback and thoughts very welcome A dump of pictures. The blue component is the body line. The little cylinder coming out at an angle is the freespool lever (clockable per 30ish degrees). 2 Quote Link to comment Share on other sites More sharing options...
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