I am just returning to RC boat building after about 25 years. I just completed a 10th scale Miss Thriftway and have had it out doing some testing on my own. The hull is built from a kit from Classic Hydro’s. It is the Ted Jones 1955 Unlimited Hydroplane drawn by Gary Finlay. This hull comes out at 35.63” long and 15” wide. For running gear I have a leopard 4082 1250 KV motor and a Seaking 180 V3 ESC spinning an Octura X447 prop. When I built the boat I did deviate from the plans and used a .187 flex shaft that exits out of the bottom of the hull “not in a straight line”.
I have been testing the boat setup with 6S with the running gear listed above. I am a little rusty at trimming out a boat, but I think the boat is a little over powered for the hull design. I hope to link up with one of the local clubs in the area this spring to try and get the boat sorted out handling wise.
Now here is my question, what do I do with this boat? I live in the IMPBA district 12 in Southern Maryland. According to my interpretation of the IMPBA rules, the fact that my boat is over 34” long, it is too long for P hydro. Does this mean I will need to run the boat in Q hydro? The fact that my prop shaft has a curve in it under the hull means that it can’t be run as a classic thunder boat.
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