Sunday, May 15, 2011
One can see stickers peeling away from the rocket as drag increases drastically. Also, the very end of the coast stage (probably mostly sub-sonic) lasts significantly longer than one would expect. There are two likely reasons for this. Firstly, the rocket is coasting in the rarefied gases of the Stratosphere and experiences low drag at this time. In addition, because this is a large and very heavy metal rocket, it should have a very good mass to drag ratio at these speeds. The Proteus actually coasted for a good minute or so after burnout. Here is a previous post about the rocket:
"Amateur rocket "Proteus 6.5" launches from the Black Rock Desert, 9/25/2010.
Constructed and launched by Jeff Taylor and Curt Newport, Proteus 6.5 reached an apogee of about 75,000 feet ASL. After passing its peak altitude, the rocket deployed a parachute and descended safely to earth where it was recovered to be flown again. Proteus 6.5 is 6" in diameter, 14 feet tall, and weighs about 180 lbs on the pad. Watch for our next flight in the Fall of 2011."
Burnout at around mach 3, apogee early to mid 70s. Would love to see it go up again. How about an N1100 upper stage? Could probably do 150,000 ft with one.