FF Power Model Trim Part I
The problem of trimming (adjusting) powered Free Flight models has been with us since the first Brown engine fired up and hauled a model skyward. The problem is to reach the best compromise between diverse flight conditions: The relatively high-speed flight during engine run and the slow, floating glide. As engines became more powerful, model designs evolved and trim techniques had to change. The trim philosophy that is discussed here has been assimilated through several years of personal experimentation, combined with the advice of many expert modelers.
FF Power Model Trim Part II
At the field, the first thing to do is assemble the model and do some hand-gliding. Many modelers believe that hand gliding doesn't really show much; however, I feel that it is another step in the overall process that increases confidence that the model will fly as intended. It is hard to tell much from a shoulder-height hand glide, because the launch angle and speed can mask the true characteristics of the model. I usually try to find a knoll or other natural rise in the ground from which to glide the model so it has more time to stabilize into the glide. Even standing on the bumper of your car might be helpful.
