Just getting this rocket finished to fly on my 1 grain motors, any 6 XL will take it to over mach 1.5 and like altitudes 15 K +...
Rocket still needs so finish work, but will get that ready for the February launch, have that already in the launch sequence line up for now.
Update 02/06/2017 - Rocket is ready, design is painted on and polished and waxed. Could be a better job but no ! I will fly that again In Georgia at Mach 1.4 so there will be some 'expected damage'. This is a fun rocket that has to perform... If it survivethat mach 1.4 trip then the next will be Mach 1.77 the final and Ultimate flight. Pieces to follow.
Update 02/07/2017 - Checked the stratologgers, 700 feet main and Apogee / back up 500 main and Apogee +2 sec. set and check. Also the actual delay is 10.8 and the motor delay is set at 15, so I will keep that delay in the motor also for now, so there will be two back ups.
Update 02/10/2017 - Charges made and loaded, Car loaded, Final stuff will be tomorrow morning. Checklist for on field filed.
Update 02/11/2017 - Launch day - was early on the field, Florence came with me and took a few pictures and video also. Rocket all loaded up and on way to pad... Take of was a bit funny, one grain motor and some windy gusts also, maybe got caught on the way up in the wind and also the rail looked a bit funny... Will re check the stability again. For the rest great flight to almost 3000 feet as simmed. Have to check the velocity, had the impression that it took of slower then the sim calculated. Also I had two stratologgers in the Av Bay and the motor charge as a third back up. The motor charge did not go off.
I like to experiment. For nosecones, it is much stronger than fiberglass, and radio signals can get through it unlike carbon fiber. It's also fireproof and lightweight, just like Carbon Fiber.
Kevlar is excellent with abrasions and impacts, that's why canoes are made out of it, they compare the strength to steel. I was thinking about how many times those fins have hard impact with the ground, especially if on rocky terrain like a gravel road or roots. With the Nutcracker I wanted to see if I could make strong weight-pressed peel/ply / breather style fins using it and was very successful. They are super strong. For the moose, the core of the fins will be carbon fiber for super rigidity, then will transition to hybrid carbon fiber and kevlar. Outer layer will be kevlar. This gives you the best of both worlds and mitigates the risk of harmonics on fin flutter since there is use of both materials.
timcub on 2017-02-06 14:14:08Z wrote:
Why do you use kevlar? Is it lighter than CF? First I have heard of it used on rockets. Thought glass was 1st choice then CF for weight (but expensive).
launch20170211_112738_485.csv 
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Comments
I like to experiment. For nosecones, it is much stronger than fiberglass, and radio signals can get through it unlike carbon fiber. It's also fireproof and lightweight, just like Carbon Fiber.
Kevlar is excellent with abrasions and impacts, that's why canoes are made out of it, they compare the strength to steel. I was thinking about how many times those fins have hard impact with the ground, especially if on rocky terrain like a gravel road or roots. With the Nutcracker I wanted to see if I could make strong weight-pressed peel/ply / breather style fins using it and was very successful. They are super strong. For the moose, the core of the fins will be carbon fiber for super rigidity, then will transition to hybrid carbon fiber and kevlar. Outer layer will be kevlar. This gives you the best of both worlds and mitigates the risk of harmonics on fin flutter since there is use of both materials.
timcub on 2017-02-06 14:14:08Z wrote:
Nice flight Freddy!
Thanks Tim, I just got up, still feel like crap...
timcub on 2017-02-12 13:03:55Z wrote:
hey how come your insane data is so different from the stratologger data? What's with that altitude?
Altitude was 2300 feet. I really do not know Jason...
timcub on 2017-02-12 16:11:33Z wrote: