How NOT to launch a Rocket - watch orientation of motor retainer clips

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NewtonsLaws
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How NOT to launch a Rocket - watch orientation of motor retainer clips

Postby NewtonsLaws » Thu Mar 30, 2017 2:51 pm

We were launching cluster rocket, 3X D12s.

All looked good until ....

Before shot of rocket on the rail was for the records but after the fact showed the issue: the motor retainer clip "locked" on to the rail rocket support screw. And that was enough to hold the rocket on the pad!
IMG_7421.jpg
Before shot, did not see the looming issue: one motor retainer is hooked on the screw!


IMG_7428.jpg
After shot, two motors burned and the obviously hooked screw.


Second launch went perfect.

Lesson: ensure all the motor retainer clips are oriented suability!
QRS #184
AMRS #134 L2 RSO / LCO

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SpaceManMat
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Re: How NOT to launch a Rocket - watch orientation of motor retainer clips

Postby SpaceManMat » Thu Mar 30, 2017 5:32 pm

Ops!
Did a similar "static engine test" myself. Oliver scratch built his own rocket but the launch lug was omitted. After RSO we realized the issue and hurriedly glued one in. Same result - lit but no go. Managed to glue it to the rod :oops:

What happened with engine #3, dead igniter?
Need to take some extra care with clusters to make sure all your engines lite.
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing


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