The MM was my first non Estes rocket that I ever built, and the first rocket in
about 15 years. Not knowing any different I built it stock (w/ Nomex chute
protector) and launched it on a H242 for my level 1 cert on a very windy day.
I've since launched in on different motors from a H97 to an I357 with no
problems. I just ordered a Warlock and hope to launch it on J's.
is AHEAD of the CG. The rule of thumb that you need the CG one
calibre (body diameter) ahead of the CP generally allows you to handle
modest angles of attack (10 degrees or so) without becoming unstable.
For really long, slender rockets, 1 is not enough. In the case of the Mini
Magg, the center of the BT is very close to the CG and there is virtually
no impact on stability as the angle of attack changes. Thus, the Mini
Magg will be stable with much less than 1 calibre separation between
the CP and CG. The only way to know how much is enough is
experience, preferably someone else's. I ran RockSim with an I-357
in a Mini Magg and the static margin was estimated at 0.50. Several
people have stated that they have successfully flown this combination.
To be safe, you'd need to know where the CG was for the rocket as
they had built it. (The CG in my test case was where RockSim placed
it and was not a "real" number.) Can people provide known CG
locations for which a Mini Magg is stable?
12. MINIE-MAGG CP