Big day tomorrow

[Rex R]

ouch! I feel your pain.
rex

[paul.nortness]

Such a bummer.

Especially after the exhilaration of that Big Daddy E28...at least I can say I've taken my first step into mid power with that

[paul.nortness]

Now the real question is.....how on Earth do I dispose of the busted motor?

The propellent and delay grains are completely intact

[Rex R]

well I've been told that the propellant grains are great for starting bonfires , or you could save them for Nov 5(guy fawks day), or the 4th of july. if you were careful how you handled the motor you should also have .7g of ffff BP (I did). just think you got to expeerience the highs and lows of composite motors all on the same day. you might want to post the motor failure with any pictures you might have of the failed case over in propulsion just so the folks from Estes can find it easily.
rex

[aditat2]

Sounds like a serious problem with Estes' SU motors. Makes me kind of glad that I decided to go with RMS' right from the start. A little more expense right off the bat, and then there's the waiting for the postman to drop them off, but it just seems like it's worth it in the long run. I was talking to a guy at Hobby Lobby the other day who told me that one of the customers came in complaining about the same thing happening to his SU that he bought there, so it definately isn't an isolated incident.

[paul.nortness]

Well, Estes to the rescue again.....Sending me a new motor and Ventris.

I am going down to my LHS and picking up a RMS 29/40-120 case and some F52 reloads today in the meantime

[Rex R]

just to remind folks yet aqgain. Estes did not design these motors, nor do they make them. I assume that they designed the lable that Aerotech applies to the Estes labeled motors. however I suppose that the label might somehow be causing the problems....
rex

[chadrog]

just to remind folks yet aqgain. Estes did not design these motors, nor do they make them. I assume that they designed the lable that Aerotech applies to the Estes labeled motors. however I suppose that the label might somehow be causing the problems....
rex

Maybe there's something to that Rex. I've never heard of so many of these blowing up since the PSII line came out - maybe a different glue on the label?

[Rex R]

well only thing I notice is that the Estes labels are 0.0005" less thick than the AT labels...dunno if that is the only difference. one would tend to think that any difference in how the motors are handled would be at the labeling stage and after. aside from that I'm not going to try and point any fingers, I just don't have enough info.
rex

[paul.nortness]

Here is an idea.

Could it possibly be the Sonic ignitors causing the problem?

[TheAviator]

It isn't the igniters. I've had problems with Aerotech single use motors before. I got so frustrated with F25's the year of NARAM-52. We didn't want to spend the money and use Apogee F10's in F Stupidroc Altitude so we went with the 25's. We detonated at least three before NARAM (my teammates might have blown more) and then one on the field there. I wanted to take the parts and throw them at Gary Rosenfeld's head. (And yes, I filed the MESS reports with the NAR.)

[Initiator001]

At NARAM-54 I flew six AeroTech single-use motors (2x F20-4W, 2x E20-7W, 1x F25-6W, 1x F50-6T) and had no issues.