- This topic has 27 replies, 11 voices, and was last updated 17 years, 3 months ago by
Adrian.
Adrian.-
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Tim Thomas
8) I have seen 6 or 8 H165 smoke the case in the last 18 months. I do not fly that motor anymore. Aero poop pooped me when I asked about the H165, they said it was user error. (my ass, and there was no problem with the old G80’s either) I flew the H268 a few weeks back over at UROC, everything was fine except for the whiplash I got watching my Javalin go.. 😛 Neither motor is a big seller, so I only bring one or two to a launch, but I have a good stock of both. BTW, I am flying both at LDRS in my Shadow MD with a Parriot high G… If I get it back… 😯
Dr. Michael Sutter DC
Yikes, something is up there. I’ve never heard of a motor doing that? When you say “blows out the side of the motor” are you saying the motor case actually ruptured? or that gas escaped between the closure and the casing?
yeah it was right above the aft o ring and the nozzle. the case actually ruptured! like it decided the nozzle wasn’t good enough and it needed to exit out of the side. I actually have 3 cases that are breached and 1 that is bulged.
and Tim isn’t lying when he has seen 6-8 cases do that, if not even more then that I think there are 2 29/180 cases breached, 1 29/120 breached and another 29/180 that is bulged….
the funny part is that the closures are usually undamaged. the Fwd closure is always fine and dandy and the rear is too. but the case will make a new nozzle in the side of it about the size of the nozzle itself.
But now I love the power of redline motors but I always tell dad that we are not using them cause Im tired of having 200 dollars in cases and nice rockets getting completely destroyed by this happening.
Some guys MHM were wanting to get there L1’s and were buying motors. Tim and I told him to not get a redline (he wanted to really bad!) we advised a White lighting instead and the guy was like thanks for the recommendation.
Dad Failed L1 in stars in stripes to breached redline and spun in the air about 100ft above the pad then caught the prairie on fire, I failed my L1 with a breached redline it singed through my tethys kwik switch 29mm motor retainer. my night rocket breached on a redline spun in the air then lawndarted destroying my neat acrylic exterior.
all in all Redline’s are no go for launch!Also Do you really think that I dont know how to build a motor? thats just stupid nonsense! ive built over 50 motors and its only the redlines that blow up seriously?
ill stick with everything but redline (im happy with CTI these days!)
Anonymous
Yikes, something is up there. I’ve never heard of a motor doing that? When you say “blows out the side of the motor” are you saying the motor case actually ruptured? or that gas escaped between the closure and the casing?
Also Do you really think that I dont know how to build a motor? thats just stupid nonsense! ive built over 50 motors and its only the redlines that blow up seriously?
I think if you re-read my post above you will see that I was not casting aspersions on your motor assembly — I was genuinely asking what had happened. I’m getting ready to fly another redline in an altitude attempt. As noted, I have never seen this and I wanted to learn more details.
For the record, the “blowby” issue I pointed to above was a manufacturer’s defect — It was NOT the fault of the flyers who assembled bad parts. I was attempting to discern if this was a similar situation.
I’m a bit taken aback that an honest inquiry is interpreted as “stupid nonsense”.
Jeremiah Johnson
Heh – the “stupid nonsense” sentence made me laugh. I read that as an extension on Tim’s “my ass” comment – as in, the manufacturers are saying that the rupture is assembly error and that is just stupid non-sense.
Adrian
I wonder what factors make the failures more or less likely to happen, and if there is anything we can do to reduce the chance of it happening.
Some general questions:
Does the liner burn through before the case fails, rather than after? Did the case get hot enough at that end for the aluminum to soften? If so, would mounting in a minimum-diameter rocket help by providing a better thermal conductive path to the wind going by?For the failures you saw, what kind of rockets were they in, and how were the motors mounted?
And by the way, I also interpreted the “you” in “Do you really think that I dont know how…” as directed at Aerotech, rather than John.
Anonymous
OK, I’ll report to sensitivity training in a bit 😐 the idea of cooling in minimum diameter rockets is pretty interesting… that is all I have flown redlines in.
I’m curious if the K270 has had any issues? Very cool looking motor – we don’t have enough long-burn K’s these days…
Tim Thomas
8) I think Doc was refering to Aero saying that it was user error. I just am not buying that at all. I have found that I see it in the H165/ 29-180 case most. Hey, anyone can have a bad batch of propellant, or a bad run of cases, that is part of life. What happens next is the problem, Aero acted like I was , A. Telling a Lie B. Some sort of dumb shit. C. Joe Bagofdonuts small time dealer. Last year GLR spent 50K with Aero, we should get better service than that. That said, I have never had any problems with the 29/360 loads. I will fire one this weekend at Hartsel and see what happens. I will let you know 8)
Ken Plattner
I’ve flown many H165R’s without any issues. Gotta make sure the o-rings are in the right spot tho…
Tim Thomas
8) A quick look at my BATF paperwork shows I have sold 72 H165’s in 3 years. Most all flew fine. The ones that were a problem were around the same time period. Maybe a bad batch, we will never know, Aero would not help. So, I just don’t fly that load. There are so many loads out there, I fly the ones that work for me. It will be nice to see the new Reds from CTI, should have them for next months launch. I will pass out a few, we can get a good look. 8)
mule
8) I think Doc was refering to Aero saying that it was user error. I just am not buying that at all. I have found that I see it in the H165/ 29-180 case most. Hey, anyone can have a bad batch of propellant, or a bad run of cases, that is part of life. What happens next is the problem, Aero acted like I was , A. Telling a Lie B. Some sort of dumb shit. C. Joe Bagofdonuts small time dealer. Last year GLR spent 50K with Aero, we should get better service than that. That said, I have never had any problems with the 29/360 loads. I will fire one this weekend at Hartsel and see what happens. I will let you know 8)
Why is it that in hobbies like this, the mfgs’ don’t seem to take their customers seriously?????
I’m dealing with a hostile mfg on some CNC parts for an RC Rock crawler, he seems to think he is God and can do no wrong and we are all peons that know nothing. It doesn’t take too many people going elsewhere to get their attention quickly. GLR is one of the few big names I have found in this hobby and I’m amazed they would treat you that way. But, a God mentality is still a HUTB thing….. Pretty much a bummer destroying stuff because of a companies pride.
Tim Thomas
Dr. Michael Sutter DC
Anonymous
Jeremiah Johnson
Adrian
Ken Plattner
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