Launch!

Glad to confirm on the G cluster. Anyway maybe its best to ask this on a case-by-case basis. Estes just released the kit and I asked since it is right on the line.

After review, I agree a G47 cluster would still be a class 1 rocket if it met all other criteria. Still, probably not a flight we would prefer to see at Acton.

The total impulse limit of a cluster per NFPA 1122 and the NAR safety code is 320 Newton-seconds. That said, CMASS may have restrictions that must be followed, but you can cluster two G motors and still be a class 1 model rocket.

Additional, even 2 G74 motors would be the equivalent of an H motor, and would in fact be a high power flight, which would not be allowed in Acton.

Guy.

The 3/16 and 1/4 rod pads all have relays and 12v batteries at each pad, as do the mid-power jaw stand pads, so lighting of clusters should be no issue. Clusters are allowed in Acton as long as the the flight is a low or mid power flight, and cannot be classified as a high power flight for any reason (propellant weight, total liftoff weight, motor average impulse, etc).

Guy.

Hi Folks, Estes released an updated Mega Der Red Max and it flies on 3x 29 mm motors. 3 E16s keeps it a “model” and class 1 rocket so it should be good to fly at Acton. 3 Estes F15s puts it over the line due to the propellant limit of 125 grams.

I believe 3 composite F motors and even the Aerotech G74 would keep it under the class 1 limit.

Does CMASS allow large clusters at the Acton site? If so, am I correct about the 3x G74? And last follow-up, assuming all of that is a go, can the launch system reliably ignite 3 Aerotech first fire junior igniters? I suppose we could test that but this might be well known.

Thanks, Alex