> How about getting extra BT-60 at the hobby shop and making a "Meaner
> Or is anything (non-HPR) longer than six feet getting silly....
I've done this with the Custom "Equinox" kit, which is almost an exact
knockoff for the Mean Machine, but with somewhat different fins (and
dual 18" chutes instead of a single 24"). The total length is about 8
feet! I used a bulkhead to have the rocket break between the 3rd and
4th tubes, for easy transport, which has the added benefit of creating a
36" long payload compartment (which I can put a sonic beeper into). I
also replaced the chutes with a 48" (yes, 48") chute which I made out of
one of those ultra-thin metalized emergency "blankets" (less than $2 at
Walmart). It gave a VERY slow descent on its maiden flight last week on
a C5-3 in an adapter, but then again the thing only went up 100-150
feet. I plan on swapping chutes when I use more power.
BTW: I would NOT recommend trying a C6-3. Rod tip velocity was marginal
(20-30 ft/sec) with the C5-3, and there was a slight tilting as it left
the pad. The C6-3 has even less initial kick in the pants to get a
heavy bird moving (although the AVERAGE thrust of the C6-3 is a little
I used epoxy and dowel rods to reinforce the fins and motor mount. I
plan on using the recommended D12-5 next, then Aerotech E15-7W SU and
various RMS 24/40 E and F reloads. I may even try CHAD staging with a
D12-0 booster as suggested in a previous post by Adrian Hurt. (Can I
get confirmation from anyone that this will not compromise stability on
BTW, I used to own an epoxy reinforced, but otherwise stock, Mean
Machine. I flew it twice on C5-3s, once on a D12-5, and then lost it on
a E15-7W. The computer says it went about 1600 feet. I still don't
know if the ejection charge failed, or if it was TOO strong and blew out
the shock cord mount. At any rate, it was last seen heading west and
downward (couldn't tell if there was a nose cone attached...), and
probably crashed into the thick of the woods several hundred yards
downrange. We looked, but no luck. Never paint a rocket "Forest
I'd recommend using an extra long, extra strong shock cord, and use
something sturdy (like an extra BT60 tube coupler) to anchor the shock
cord in the airframe.
Good luck with your stretch MM!
NAR#71767 / CTRA-NARCONN#200
"My CG has moved aft of my CP. No wonder I'm unstable!"