Sunday, April 8, 2012

three motor rocket




I have launched the 17 feb rocket with three solid fuel  engines in the desert on 1-4-2012, the day was beautiful sunny and temp. was 19 c .                 
I do not have sensors for speed and altitude,or parashut  electronic release system 
i have tested one of those motors practically in desert for recording speed and distance.
the size of the motor was 30 centemeter long aluminum tube by 7 centemetr dia. was made 1000 meter during 2.5 second  on flat land.
 i add three motors of this type on my rocket and according to my calculation it should make
  three times the distance.
launch stared ,i was 20 meters far from rocket with my camera. i did not  expect the speed of it when lifted off, in moments disappeared in the sky. my camera caught nothing more then launch start,
 i kept listening in the desert silence trying to hear it ,and that what was  the result .
after launch rocket and sound disappeared for 6 seconds then i heard sound in the sky like the   roar of aircraft  for about 3 seconds ,sound disappeared again for few seconds and i saw it falling to the ground 1000 meter  far from launching point. the total time from start to back was 20 seconds.
  my calculation was rong and it was new experience to me.
next i will try to make simple parashut air release.