Nikrum said...

Right. Perhaps, maybe I can start another Argument as things are a little quiet on the Forum at the moment..

What is the general perception on the Construction of Chassis and their performance/Advantages ie; Chassis Y Under Slung, Over The Top or Neutral.

Just from Observation I think that the under Slung Chassis would offer a stability advantage from a tipping point of view, though there would probably be decidedly greater Torque Strain at the Mast Step/Chassis Joint?? There could be advantage and disadvantage through Trade Offs in position of Steering Rake etc..

Thoughts please..
Ron

i dont know what you mean by neutral, you can only be under or over, is this really a construction thread?

the chassis from that photo started as a flat chassis set up for wheelbarrow wheels., it had plenty of ground clearanceand no problems with stability.
importantly the length of the main spine needs to be long so the stiff mast can make the whole thing flex.
also the axle need to longer than you would get with a T frame so the rear axle is raked back on each side by 20degrees.
this is quite common as it is how almost all the promo yachts are built. the 20 degree rake back relates to the FED 5, designed by mike hampton in the late 80's, early 90's.
my old pacific magic design has a lot more rake and i dont think it performs as well.
the cranked axles occured when i used the yacht as a test bed to destuction test( or not) my 26" wheels.
It certainly improved the performance, allowing the weight to be moved back , even upwind.
I made the cranked axles instead of vertical droppers as I found on earlier yachts that a dropper has some odd twist characteristics that were not good for wheel alignment,and handling