I built one with a 34" length of BT-20 and a 13mm mount for an A RG contest event. The first flight qualified; the second van-darted (destroying the balsa nose cone.)

The only things I can gather is that a 13mm casing plus mount weighed less than an 18mm casing and I got lucky the first time. Or it may be because I did not think of shaking any debris out before flying it again.


Bill

__________________
It is well past time to Drill, Baby, Drill!

If your June, July, August and September was like this, you might just hate summer too...

Please unload your question before you ask it unless you have a concealed harry permit.

: countdown begin cr dup . 1- ?dup 0= until cr ." Launch!" cr ;

Give a man a rocket and he will fly for a day; teach him to build and he will spend the rest of his days sanding...