I built a LOC Forte which flies well on H180-10s, as well as F40-4 and G80-7.
I made the following modifications:
Added two centering rings up at the front of the MMT, slotted the MMT between
them, and cut holes in the top one to form an ejection gas baffle. Using that
plus wadding I have no scorch marks on the chute yet.
Used a small piece of fiberglass to cover the epoxy puddle at the shock cord
mount. Used about triple the supplied length of shock cord.
Using the additional centering rings let me put one of the supplied rings at
the forward edge of the fin root tab. Then I put epoxy fillets on the fin tabs
on the inside of the body tube, before installing the rear centering ring.
With enough field you should be able to use this as a Cert 1 rocket. And I am
looking forward to seeing how it does on the new 29mm I200. But do not launch
it with an H motor off a Mantis pad.
Jack W. Kale, Jr. NAR #70384 Insured, Tripoli #5798 Level 2 March 16, 1998
Timmy, you can't take it with you, so if you have a sandwich and your blue
jeans, chill. Your old man, Paul. (1st century, paraphrased)