Axle/spring/shock geometry

[Caster]

I plan on starting my first expedition trailer this spring. I've got a source for 3" heavy square tubing for cheap as well as a lot of other steel I've been collecting. I'd really like to do this right the first time.....unlike many of my other endeavors.

I don't fear the fabrication part of it at all but my real question here is; Is there a book or something I can source to help me with the axle? I have no idea how to place perches and shackles properly or where and what angle to lay out a pair of shock absorbers.

I've read a lot of threads here and have a lot left to read before I make the first pencil drawing but mine won't be overly elaborate. Single axle level with my [stock] FJ. I'd like to use a pintle and get a decent amount of suspension travel on par with what a stock FJ can do. I don't plan on getting into any real hairy places but I'd like to know what I build will go anywhere me and my FJ can. I've found a place locally to get hubs that'll match the 6 lug of my FJ so spares will be universal.

No need for long replies [unless you have the time, then I do appreciate that!!!] just a finger pointed in the general direction.

Thanks everyone!

 

[Coby65]

If I build or buy a trailer I think I am going with this setup.

http://timbren.com/axle-less/

 

[Caster]

That's nice but a wee bit outta budget.

 

[Coby65]

Ok rule of thumb on leaf springs is to solid mount the front hanger and the rear shackle the bolt in the shackle will be 1/2-3-4" behind the mount bolt on the frame.

Shock mounting angle can be debated. Just make sure you get the proper length shocks for full compression and droop.