XR-10 Boilerplate version gets its coat of primer.
Tomorrow evening, it gets its color.
XR-10 boilerplate gets its coat of primer…
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(Middlefield, OH – March 22, 2014)
On March 22, Comanche was set to take to the sky for a second time on Mission CLS-002. At ignition, all things looked good, but in a fraction of a second…not so good.
Ignition…
In less than 1 second, Comanche whipped around the air at maybe 50 feet….then the field was quiet.
After recovering Comanche & inspecting, it became apparent there was a motor failure. The failure is what high power rocket folks call “blow by”, where the exhaust from the burning propellant “blows by” the delay grain pellet, and ignites the black powder recovery charge.
This caused the deployment of the drogue parachute & apogee separation event right at the launch pad.
The top half of Comanche shot upward, then the booster started to raise into the air as the motor came up to pressure. This caused the booster section to “ram into” the upper section, and from there the unstable rocket whipped around for a bit until the propellant burned out.
We have a problem…
Normally a rocket would be totally (if not nearly) destroyed by such an event. Comanche only suffered damage to the section of the booster that made contact with the upper section. That and a LOT of soot inside the booster were the only results of this episode. Whew!
Cleanup & repair took about 3 days to complete, and Comanche is ready to go again, with mission CLS-003 set for April 25, 2014.
Here are the rest of the photos to view..
Booster section making contact with upper half
Apogee Baffle covered in soot…before cleanup…
The same apogee baffle after cleanup…
The entire interior of the booster was just coated in thick soot…
The damaged section of the booster…the part that ran into the upper half…
The moment the booster made contact with the upper half of the rocket…as seen from Comanche’s on-board camera.
Sunday, Feb 15, 2014 – Cuyahoga Falls, OH
The repairs to Comanche XR9C have been coming along at a steady pace, and have been completed. Comanche is now awaiting a “paint job” for its new sections.
Comanche XR9C with it’s new fin can bolted onto the airframe.
A few days ago, Comanche’s new sections were bolted together for the first time, and all looked good! The new fin can section fit together beautifully. I made some subtle but important design changes to the fin can to make it more durable in the event of a similar mishap in the future.
The parachute bay has also been repaired, and is also awaiting a fresh coat of paint. Comanche is on track for a March 2014 return to service flight.
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