At least in the russian flyer they aprease a netto
load
of at least 500 kg (~1100 lbs).
In Japan in the early 60's, there were a lot of three wheel vehicles,
including tractor-trailers, fire engines, even some sort of dumpster
dumper!
Could you fit yours with a trailer?
--
Grumpy Ol' Fred cisin(a)xenosoft.com