How strong will this frame be compared to a traditional frame and tunnel?
A-arms and the drop "brackets" looks a bit skinny and weak.
What type of metal are you using on this one to make the sled light and strong?
depends which brands chassis! not quite yamaha strong:face-icon-small-win but for the weigh, your gonna be hard pressed to touch the strength.
as for arms, i broke a set off my sled last year, also hit a old growth pine tree doing about 40. they will hold up to normal bumps and bashes but are designed to fail instead of wrinkling the chassis. the drop brackets are no problem, very similar design last year supported 2 riders and a sled with no a-arms balanced on the back.(reference my tree incident)
various sizes of chromoly is our main material.