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Overview procedure:
The development of this car was the product of a LOT of scrap parts, a LOT of creativity, and a LOT of hope.
Materials:
1- Nikko Wasp, 2-model rockets, fuel- proof rubber bands, 1-mechanical SC (Speed Control, apposed too the modern digital ones), 1-big bottle of superglue, 1-copper rod, 1 9.6V battery pack. A, B, and C model rockets, igniters, and retaining caps.
Description Specs:
Thrust: Two A-C size rocket tubes (Primary and Secondary)
Weight: 4.2 lbs.
Height:1 ft.
Building Procedure:
You must first drilled a hole through the back of the car through front, just large enough to fit the rocket through. Then unscrew the top of the car and remove all of the electronics. Next remove the steering servo, and then saturate all turning and movable surfaces with the super glue, make sure that nothing moves, and the steering is centered (this is essential so that the steering remain straight). Too provide additional take off power I left in the original motor and battery. Since all the rest of the electronics had already been removed I added in a manual SC, it was velcrod in place. I attached a copper rod to the control arm, and then cut a hole for it to poke out of in the side of the car. Then I soldered the connections from the SC to the motor and battery.
Next the primary rocket was slid into place, the nose cone and parachute was removed and it was rubber banded into place. Then a secondary rocket was attached to the roof of the car for additional thrust.. It was centered by the gap in between wings of the spoiler and held on by three rubber bands and a wooden brace in between the spoiler and roof of the car.
Launch Procedure:
When we launched this rocket for the first time we had no idea in what we were to expect to happen. So the first couple runs were done under extreme care.
Test 1: For this run we fired only one A engine in the primary rocket tube. We wanted to know exactly how easily this car was going to move. Test 1
Test 2: For this run we fired two B engines, unfortunately for this test one of the igniters proved faulty (the primary rocket), and immediately following the run a violent explosion occurred and the entire tail end of the secondary rocket fired out of the back of the rocket and landed about 15 feet away. Test 2
Run 1: After the preceding runs were made we determined with two C engines that it would be enough power to thrust the car forward. We placed the car on a platform over looking a 50 foot drop. The landing area was a 200 foot span of sand, ending in a opposing 50 foot wall of cement and a chain link fence on the top.
When fired both rockets fired up in harmony and the electric assist worked properly as well. The big surprise we encountered was the actual flight of the car. Immediately after launch the car leaned into a severe dive, then began spiraling end over end until it crashed onto the ground. Run1, Run1 (Second Shot)
Conclusion:
The entire test team unanimously agreed this was indeed a constructive failure. We believe that the reason for the dive and spiraling was due to the angled thrust that the rocket had. We think that if a level thrust is provided that a vehicle will be able to fly forward at a much greater distance.
Distance of Flight: 6 ft.