21 Phil Thomas with Spec power

[detox]

I don't understand how this hull can run well with the CG back.

the CG is spot on .

Cat-Boi,
I like your SS21 setup with motor in the back. This allows more room for batteries up front. The way I have my motor mounted upfront/center does not allow me to use just any size of battery. I cannot fit a battery wider than 43mm using Nue 1515 size motor with cooling jacket or large 580 motors.

I once tried running my SS21 with everything shifted forward, but hull seemed to be running too wet. Maybe my strut/prop was adjusted wrong causing this.

Longer runs of cable thru the stuffing tube also causes more cable vibration or resonace IMO. Adding S shape to stuffing tube should help my situation.

Here's picture of old forward setup:

[Cat-Boi]

that works too, but I like to keep the stuff tube below the waterline as short as possible, even my 45 exits rearward to avoid dragging too much stuff box. Probably doesn't matter as the glo set up runs fine forward. As long as the CG is good that's all that really matters.

the strut setting on this boat does demand a low angle of attack on the stuff tube.. I think its 7/8" sitting strut on flat surface to bottom of hull.

[Cat-Boi]

you heard it here first, Phil is working on a new Super Sport 21FE. I am helping him a little with specs. testing begins this spring.

(I am #1 on the list). It's gonna be good.

[Fluid]

...the CG is spot on .

What the heck does that mean? Spot on what? Back of turn fin? Center of turn fin? At the sponson transoms? Ahead of the sponson transoms? Have you tried it at different locations? Here is what Phil Thomas says about the nitro version of his SS21:

TRIMMING THE BOAT: The 1-1/16” inch strut depth is a good starting point. If the boat rides too light on the water, adjust the strut deeper. If the front sponson are running too hard on the water adjust the strut higher until the boat rides flat on the water but will not blow off. Small adjustments to the strut angle can be made also. Weight can be added to the nose to fine trim the hulls balance point if needed. The hull should balance about 14 inches from the transom without fuel....Small changes can affect these smaller boats more than we think.

The optimum CG actually depends on the hull, turn fin, power, speed, weight and tunnel depth. Just 'cause the nitro version runs it at a certain place doesn't mean that point is the best for every FE version. The real test is what works best, and that requires experimentation past the optimum CG and strut depths. You may be there now, or not.



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[Cat-Boi]

precisely this..

IT FLIES! stays stuck and hauls butt!

[Fluid]

Nice of you to share the actual CG location with us......




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[Cat-Boi]

I will have to check it and get back to you. its just behind phils spec.

[LuckyDuc]

What are these hulls weighing in at RTR for LSH and for P-Sport?