Originally posted by rstaff3
I hope they write a flight report. I saw the event you saw Doug and would be interested in knowing. I also lost track of the final specs...weight, height, altitude expected (er, I guess actual is all that matters now )
Total weight = 1400 lbs
Altitude = 3150 ft (Missileworks), 2996 ft (ARTS)
and 3000ft (BlackSky)
Max velocity = 270 mph
Max acceleration = 13 G
average acceleration = 9 G
velocity off rail = 130 ft/sec
Propellant weight = 106 lbs
Mass fraction = 7.8%
Motors = One P10500 (43500Ns),
two O8200 (20500Ns),
two N5400 (14000Ns)
Total Impulse = 112500 Ns
Thrust = initial 11000 lbs and peak 17000 lbs
Average Thrust = Q45000 (44% Q)
Burntime = 2.5 seconds (The P motor burned 1.5 sec. more or so)
Propellant was characterized, designed and made by MDRA members Bob Utley, John Ritz and Neil McGilvray using a variation of a blue formula by Bob Utley, Darren Wright and Jim Mitchell,
the formula was named Liberty blue. An article will appear
in HPR and Extreme Rocketry Magazines sometime.
THX, John Ritz