Cross Files

摘要

This column has hosted many questions from modelers about building and flight trimming. Readers have always risen to the challenge and helped others become better than average modelers. Now, I'm doing the asking and hoping for some bright answers. I have about a dozen .020 replica F/F models that I want to convert to electric R/C. They span 30-34 inches (150-170 square inches area) and weigh about 100-120 grams without motor. They flew well as freeflighters and now that I'm a bit slow at chasing, should morph into R/C (rudder, elevator and motor speed). I have a Brooklyn Dodger, a Swami, a Fubar,- a Buzzard Bombshell and several others. I have heard there is a web site that has a formula for conversions of this sort. I tried the various on-line vendors and had little success. All of their charts start with larger engines such as 0.10 and larger. What I want to do is plug in the span, weight, engine and prop and come out with the motor, battery, prop and trim. Any suggestions will be greatly appreciated, and I'm sure will help some other readers.