Moderators: John@sos, charlesp, Charles uk, RickUK, Petergalileo
Those Robins had enough stability problems when on three wheels, the tracks look like they might give you quite a bit of weight at the rear corners which will not transfer to stability in the same way low down weight in the middle of the "hull might". In practical term, two outriggers that fold out from the rear inside of the vehicle would be easy to construct and could even be electrically deployed, they could give added flotation and stability. Another thought. that could be better looking, is, being fiberglass it would be reasonably easy to alter the profile of the body in the appropriate areas creating an air filled voids on the exterior surfaces to obtain flotation and stability, I'm picturing something like an exaggerated body kit working like the collar on a rib. There are probably places inside of the body that similar voids could be created for flotation using glass fibre, wheel wells etc. I guess they could be filled with expanding foam to guard against leaking. A cleverly worked front bumper running down the sides and in to a rear bumper could do the job, keeping the bouyancy at the edges would give stability like an inflatable boat. Getting it floating fairly high in the water would overcome the huge drag associated with many amphibious vehicles and help keep your engine out of trouble. You could rough up the basic shapes with thin plywood or even cardbord and then use the fibreglass mat and resin to strengthen them as you mold them to the bodywork. Plenty of filler, some paint and imagination and who knows.Charles uk wrote:Can you measure the weight each wheel is carrying with you in it & give us a cross sectional sketch with the wheel locations & the external dimensions, I think without outriggers you might have stability problems.
Are you a mind reader?...fortyplus wrote: You may wish to refer to the procedure for getting a Seagull running again after full immersion for future reference