RE: DynaFlite Super Decathlon Kit Bash and Build
6.4 oz for the elevator on its own.
The O.S. GT33 weighs ~43.85 oz according to O.S.'s website, so I'm building using that as a target. For the Decathlon, the ratio of length between the engine to the CG vs the tail section to the CG is roughly 3:1, or the tail is 3x longer moment than the moment to the engine. That means for every ounce out on the tail, 3 ounces near the engine will balance it.
so. 43.85 oz / 3 = 14.61 oz = very rough target weight for tail to balance engine.
so obviously, the body between the tail and engine will contribute to this, the gas tank/cowl/prop hinges covering tailwheel, main wheels etc will all add to this equation, but for rough numbers this seems like a decent starting point. I'll be a happy man if the elevator and rudder come in at or around 10 oz.