6" with an M2020...must have had an altimeter; can you post the file? I'm considering making a kraken for fun in the near future (some scrap 1.75" CF tubing I want to use some of, good for 38mm motors). I'm interested in how much stress it was under when it let go. Sorry to see such a beautiful rocket go though!
Oh man, sorry to see that! Did it lose stability when the fins came off?
Thanks for the sympathy, The Kraken died swiftly!! Not sure how much stress it had except it was just a little to much. I still have a hard time believing how shredded the tube fins were. Most of the pieces we found were in the 4"x4" size. BlueTube is so tough I know I would have a hard time ripping it into pieces like that
(Holds hat over heart) Sorry about your loss, sir :sad:
I see something interesting in the flight data. To my eye it suggests you actually got to the end of the motor burn OK at about 3.1 seconds. And then it briefly entered coasting flight, and it looks like it started to come apart at about 3.35 seconds. (somebody double check my observations here OK?)
And it was HOT - a hundred and eleven degrees - for the entire flight. Black rocket in direct sunlight, maybe?
Anyway I hope you got some usable parts back.
Wasnt Black Rock and some might say its worse!! Fresno in the Fall:y: Actualy it was a great day only mid to high 70's
Yeah it lost stability severly tumbled around and the rest of the rocket came apart as the motor finished burning. I was surprised when I opened up the ebay to see the Ravens capacitors had been stood straight up from the lateral g-force.
Epoxy the capacitors down; it will protect them from extreme G-forces.
Yeah it lost stability severly tumbled around and the rest of the rocket came apart as the motor finished burning. I was surprised when I opened up the ebay to see the Ravens capacitors had been stood straight up from the lateral g-force.
I remember seeing it happen--a beautiful boost, and then it looks like one of the tube fins tears off, and the rest comes apart. My impression is that the shred is towards the end of the burn. As the first fin tears off, the rocket starts spinning about itself spewing exhaust in all directions. My guess at the time is that the fin tears off as it hits Mach towards the end of the burn. Wonder if altimeter data supports this theory.
Beautiful rocket.
Sad to see it go.
Ari.
I'm not on the TCC list, but I have photos from Martin Hall (including wonderful pictures of my daughter doing a post-landing safety check). If there are others, please point me to where I can get them!
Ari.
Martin did get some great shots. Lots of great October Skies picks in here. Im sure i saw some of your nice glider flight
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