View Single Post
Old Nov 02, 2012, 11:59 PM
BMatthews is offline
Find More Posts by BMatthews
B for Bruce
BMatthews's Avatar
The 'Wack, BC, Canada
Joined Oct 2002
12,819 Posts
Coming from someone that made his mark by "doing the math" the suggestion for a simple test glider is all the more valid.

I'd go so far as to suggest that the 1/4 to 1/6 size "test glider" use copper wire as "hinges" for the ailerons and elevator. That way you can adjust the reflex of those three surfaces from near zero up to what is needed to achieve stable flight. You'll know when you need to add some additonal reflex and then nose weight to shift the CG forward because the model will tend to dive or stall then dive when you do not have enough reflex and a far enough forward CG to match the amount of reflex. Once you get the reflex and associated CG up to where they need to be so that the model can recover from a too slow launch or recover from a stall without nosing in you'll have a good idea of how much reflex is needed for the full size model and where the CG should be located.
BMatthews is offline Find More Posts by BMatthews
Reply With Quote