MHM Day Four - Northern Colorado Rocketry

This topic has 18 replies, 8 voices, and was last updated 14 years, 4 months ago by Chris LaPanse.

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May 30, 2011 at 8:51 pm #41285
MikeS
Moderator
Great morning. Flew from 8 – 12. By oneish it had started raining.

Taking the trailer back then home I hit hard rain, hail and wind. But
the four hours we launched were perfect.

Some found Chris’sss core sample. Was not as bad as I expected.
He builds one hell of a fin can.

We even had a level two cert. today

Great help with tear down also.

Pics. https://picasaweb.google.com/mshinn2001/MHMDayFour?authkey=Gv1sRgCNyT-cOB2MrHcQ#

Vid. http://s46.photobucket.com/albums/f131/mshinn2001/

Thanks everyone for a great weekend.
May 30, 2011 at 10:43 pm #54429
Warren B. Musselman
Moderator
Doesn’t look like Chris had a good weekend… in fact, looks like he might need some heavy equipment to get all that prairie out of the airframe… hope you didn’t sustain too much damage and you got an altitude out of it.
May 30, 2011 at 11:28 pm #54430
Chris LaPanse
Warren: it shredded on the way up. Apparently, a PR 5 inch nosecone isn’t terribly happy at mach 2.2.

(My fins stayed on though :D)
May 31, 2011 at 2:14 am #54431
Christopher Dreher
Warren: it shredded on the way up. Apparently, a PR 5 inch nosecone isn’t terribly happy at mach 2.2.

(My fins stayed on though :D)

Any videos of the flight? It looks from one of those pictures that the forward end of the motor might have got messed up…was there any damage to the case?
May 31, 2011 at 2:41 am #54432
Adrian
Participant
Did you get data? I wouldn’t have thought it possible for a nosecone to fail before a tube or coupler, but I guess anything is possible. Maybe we could see what altitude it was at, and look for wind shear in the balloon data?
May 31, 2011 at 2:45 am #54433
Warren B. Musselman
Moderator
My sympathies Chris… hope you do better next time. Such is what happens in the amatuer rocketry world when you push the limits.
May 31, 2011 at 3:30 am #54434
Chris LaPanse
Did you get data? I wouldn’t have thought it possible for a nosecone to fail before a tube or coupler, but I guess anything is possible. Maybe we could see what altitude it was at, and look for wind shear in the balloon data?

If you can get data off of this, it would be pretty incredible:

As for the failure, I found enough pieces to be sure that the complete electronics bay and everything below it was intact on impact. The upper tube and nosecone were missing. I doubt the tube failed without the coupler (e-bay) failing as well, and the tube should be under less stress than the nose, hence my assumption that the nose failed. The failure happened, as best I can tell, at around mach 2.2 at around 4500 feet. I’m more sure of the speed than the altitude. The fins are still attached solidly though, and the booster is pretty much intact. The casing is toast though. I might talk to Jeroen, and see if it can be cut down – the damage is all to the front of the case, so maybe it could be cut, rethreaded, and I could have a usable 5 or 6 grain casing. It’s definitely never going to be flown as a 6xl again though.
May 31, 2011 at 3:59 am #54435
greywolves
Dragons would be envious of the flame on that N5800, Wow, what a boost! Great daily pictures Mike, you sure have some neat rockets.
Had a great time flying and hanging out with you all.
Until we fly again!
May 31, 2011 at 1:58 pm #54436
SCOTT EVANS
Wow 😯 That musta been expensive. ➡ 😥
May 31, 2011 at 2:04 pm #54437
Adrian
Participant
Did you get data? I wouldn’t have thought it possible for a nosecone to fail before a tube or coupler, but I guess anything is possible. Maybe we could see what altitude it was at, and look for wind shear in the balloon data?

If you can get data off of this, it would be pretty incredible:

Looks like the data already came off of it 😥

So everything forward of the av-bay is missing? What about the chute? Was this in a standard configuration with nosecone/airframe&chute/av-bay/drogue/motor?
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