MG Cof G

[wiskers]

I am a bit confused about the center of gravity in Miss Geico. The instruction manual states "the center of gravity of the boat should be 30% (9-inches (228mm) from the rear of the boat)." I have measured the spot from the transom and it works out to almost exactly the wood crossmember aft of the motor. So here`s the delema; with my bateries all the way back touching the transom the boat is still very bow heavy. When I put a rod under the boat to find its CofG it works out to 1 1/4 inches ahead of the first mark. That would equate to using the back of the sponson to measure from. Can any one shed some light on this for me please.

[PDR447]

hmm, odd. mine balanced up well with the batteries even with the back of the batt trays. nowhere near touching the transom. anything added to your boat?

[wiskers]

I`ve add a little bit of poole noodle to the points of the sponsons for flotation, but that should be neglidgible

[wiskers]

I put Miss Geico on the scale : full load 2-2s 4000mah batteries and all - 4lbs 13.2 ozs or 2.189 kg

[PDR447]

eh, don't underestimate the power of leverage. even "lightweight" pool noodles way out at the tip like that could have a significant effect on such a lightweight boat. just for fun, pull the noodles and see how she balances out.

[wiskers]

Ok, pulled the noodles. You're right, did make a difference. Still a liitle off, with no noodles the front of each lipo is on the balance mark which makes them hang 1/2 over the back of the battery tray with no support.

[ron1950]

so how did it run without the noodles?

[wiskers]

Way to windy today, besides I have to figure out how to suport the rear 1/2 of each battery.