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custom built spec lift trailer build/calculations
Hello out there,
I have accessed this website from time to time when I have been bouncing ideas around for things I am building.
Anyway, I have a question/problem I am trying to work out in my head prior to building.
I am building a spec lift for use by my father to recover/transport vehicles behind his silverado truck. He only plans to use it from time to time, but would be a god send when he has it.
I have got a purpose built spec lift OFF an retired recovery vehicle that has hydraulic lift and powered in and out to assist loading.
I have got 2 rubber torsion suspension axles I plan to use that are rated for 4000lb each.
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The pointed end is the hitch to the truck and is 60" to the centre of the load path. the opposite end (rear) is where the vehicle wheels sit which is 60". the lift it's self is a inverted T shaped arm hanging off the the bottom of the T. One side is extended back for the vehicle wheel to sit on and the other side is connected to a hydraulic ram to raise or lower arm.
I worked it it out I have about 6600lb suspended on the pivot. I would like to run 95% of the weight on the axles with 5% transferred to the truck for stability and due to max weight by tow rules. where would you position the axles under the load path to get this 5% transfer.
If you require more pics, Let me know and I'll send them as I am using google sketchup to rough draw