Rigger design question

[Fluid]

The 'measurement' given for the CG is just a simple way to describe what really matters - the distribution of weight between the sponsons and the prop. Most riggers run between 60% and 70% of their weight on the sponsons. The exact amount depends on the aerodynamics and hydrodynamics of the particular hull at its design speed.

Bottom line - the "best" way to determine the balance of your rigger is to weight the boat at the prop and at the sponsons. (Recording the inch measurement is easier but that changes with each hull design.) Move the CG accordingly to maximize performance.



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[Simon.O.]

Most riggers run between 60% and 70% of their weight on the sponsons.
Bottom line - the "best" way to determine the balance of your rigger is to weight the boat at the prop and at the sponsons.
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Cheers again Jay.
Now I am not one to be anal about spelling (o.k I am if it is really bad ) but this is one time where it is important.
Can I assume that you mean weigh the boat at these two points.
I think it is so we will carry on.
I am happy with weighing at the prop. o.k so now I have to go and get a set of accurate digital scales, that's fine as I can use them in the kitchen too.

Regarding the loading on the sponson, Is this loading and therefore the weighing point the actual running surface (rear) or somewhere else between the front and rear of the sponson.

I apologise if I sound like some six fingered swamp dweller with these questions but I am collating data for a possible winter build.

I am looking at a SAW style rigger to really put the sh1ts up the ducks on my local pond as I am much like Paddy, in that it is me, the pond and the ducks.
I am leaning towards a 5S pack and a suitable XL size motor.
5S is because I still have a 700SC powered mono and cat that need some electrons sending to them. I figure 5S will wake up a 700SC on a 440 wheel.

Back to the rigger again.
I am wanting to "see" 100kmh or 60 odd mph, if it looks like that then I will be well pleased.
I will set up a specific design and build thread when the time comes.
For now I am looking at about 30" LOA with a XL can on 5S turning a 40mm wheel......or something like that !!

Another option is a 36" twin powered cat.