Flight Log - 2013-06-30 - Rich DeAngelis's Stonebreaker

The Stonebreaker is a medium-sized, medium powered sport rocket.  The design concept is that this rocket is to be used to carry nuclear warheads into space to target large asteroids that are endangering the earth.

My particular rocket has been modified to use a smaller, 19" Nylon parachute. The stock 32" parachute supplied in the kit is much too large.  I also added a small altimeter compartment in the base of the hollow plastic nose cone. The other difference is the addition of a spring clip for the motor (not supplied) and I painted it bright silver instead of the suggested white.

Flight Date: 2013-06-30
Rocket Name: Stonebreaker
Kit Name: DynaStar - Stonebreaker {Kit} (05028) [?-]
Flyer's Name: Rich DeAngelis
Motors: D12-5
Expected Altitude: 500.00 Feet
Wind Speed: 4.00 mph
Launch Site: Fort Indiantown Gap, PA
Actual Altitude: 484.00 Feet

This was the first flight for this rocket, so anything could have happened.  The D12 lit as it usually does, and fired this light rocket quickly off the rail at 10.8 Gs, burning for 1.8 seconds and averaging 2.5 Gs throughout the burn. This was just enough to get this rocket to 100 mph while it shot very straight upwards.
The delay was a little short, firing off at 4.6 seconds while the rocket was still going up while at the altitude of 478 feet.  This caused the upward coast to stop in the next 1/10 second at an apogee of 484 feet. (quite a bit lower than Apogee’s website shows: 639 feet, but that was probably from a computer simulation – not reality).
My custom 21” Nylon parachute caught the wind and opened up fully, bringing back the rocket slowly at 7 mph. I can only imagine what that 32” monster chute in the kit would have done!
This was a very satisfying first-flight, with a slow but steady return, not unlike the big rockets, giving all a chance to admire its glossy silver finish gleaming in the sunlight.  The duration of the flight was 50 seconds.
I could imagine myself using an E9 or E15 motor some day, but I would need an even smaller chute if I want to see it again.

StageMotor(s)
1Estes D12-5

 

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