Finding CG

[awfireman]

What is the best procedure to find my hulls COG? What is the ideal COG on a mono....between 28-30%? What should I balance the hull on to find my current and future COG? . My hull is 32" from tip to transom (without rudder), 35.25" with rudder included. I am assuming you use the hull length without the rudder? Thanks again guys. A lot of questions lately and I appreciate all the help!

-Fireman

[properchopper]

There is not necessarily a "perfect" % for CG - depends on your running preferences. Smooth water zoom-zoom runs will benefit from an "aired out" running attitude with minimum hull in the H2O. Racewater requires somewhat more forward CG to keep the bounce-landing under control. Besides CG there's other tuning factors that affect running attitude : prop depth, propshaft angle, prop lift, rudder angle, tab setting and even to some extent hull aerodynamics. For monos I prefer to start tuning at roughly 28-29 % measured bow to transom (not including hardware) and play with the other variables I just mentioned.

I use one of these (4-pack available at local el-cheapo furniture mart for $29.95 and come with free nightstand)

CG2003.JPG

And then

CG2001.JPG

Enjoy

[fweasel]

Good for monos, cats, and dogs!

[awfireman]

Thanks for the help and info chopper! Nice "tool" to find COG...dont need the nightstand though!

[785boats]

I wish I could afford one of those Super Hi-Tech CG-O-METERS

[CraigP]

Keep in mind that the side-to-side balance is very important on monos. I had to weight one side to offset the rudder gear and servo. A properly trimmed mono will ride pretty high in the water on acceleration going straight and needs good side-to-side balance to keep off the trim tabs...