L2 Cert Flight- CTI J760 CATO

What is a J760? I am not familiar with that motor.

djs said:

I've flown several Pro54 motors before (I thru K) and have never had any issues with them.. hopefully this is a one time glitch for you!

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Same here. In fact, weather-permitting, I'll be flying one Saturday. Any motor can cato for a variety of reasons. But honestly, due to the lack of need for assembly (24mm thru 54mm), they are probably the least likely to cato.

Bat-mite said:

What is a J760? I am not familiar with that motor.

Same here. In fact, weather-permitting, I'll be flying one Saturday. Any motor can cato for a variety of reasons. But honestly, due to the lack of need for assembly (24mm thru 54mm), they are probably the least likely to cato.

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Its a 99% J motor. Cesaroni 3 grain w/ White Thunder propellant. (I'm not quite sure what you meant so... https://www.thrustcurve.org/motorsearch.jsp?id=936 )

Unfortunately theory and real-life don't always align, but I still have full faith in my CTI motor future. Please let us know how it goes and the date code if possible!

Glen
If I were to guess I would say I have flew 100 Pro54 motors. Its been years since there were any issues. Nothing major. Things just happen even AT has its failures from time to time.

crossfire said:

Glen
If I were to guess I would say I have flew 100 Pro54 motors. Its been years since there were any issues. Nothing major. Things just happen even AT has its failures from time to time.

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If you're at the WOOSH launch in a week- you'll find out! Assuming, of course, Tim has in stock what I'm looking for

This is the worst CTI CATO I think I've ever seen; I can barely recognize what I'm looking at in most of the photos. I've had a number of failures of Pro54 motors, usually 6XL, and they are usually either an overpressure (forward or aft closure blown out) or a bulge/burnthrough near the fore and/or aft O-ring. I've never seen a case melted in the middle like this one seems to be.

CTI Pro54 user assembly errors are: O-rings rolled out of their grooves (more likely with cruddy cases, spray silicon spray in the case before putting the reload in) and damage to the nozzle trying to push it all the way forward before installing the closure (don't bang/press hard on the nozzle itself.) Other than that, CTI has had issues with liner tolerances, making burnthrough near the forward closure more likely; that's why some people like to epoxy the forward closure in.

Occasionally these things happen, when thousands of motor are sold, there are always a couple boo-boos.
Just statistics no matter who makes them. Law of averages.

I have seen 2 other cases of this motor doing pretty much same thing...blowing off the rear & traveling through the rocket...here's one at my club back in 2012. Well file won't load here..darn. Had a video...just Google this:

John's CTI J760 Cato Youtube.