brettkeller
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(This may overlap somewhat with Conan's Motor Comparison thread)
My PML Endeavor (named Lunch Money) has flown on I's and a J350 to date. I have Aerotech 38mm hardware, 54mm hardware up to the 54/1706, and the Loki 54/2800 motor.
My Endeavor has Quantum tubing, and the only major non-stock modification was fiberglassing the G10 fins to the motor mount (fin can construction photos here).
Normally I fiberglass cardboard of phenolic tubing for my rockets, but I hadn't built a rocket with QT before so I wanted to try it out at least once. Now I want to know how far I can take Lunch Money, and am hoping for more specific answers based on real-world flights with QT, rather than rules of thumb (like 0.85 Mach).
So, a couple questions:
And here's some data to help the discussion out (took a little while to format). I ran a number of Rocksim simulations, and have ordered here by velocity, with mach numbers calculated by dividing the velocity by the speed of sound, in this case 1,125 feet/sec:
Thanks!
My PML Endeavor (named Lunch Money) has flown on I's and a J350 to date. I have Aerotech 38mm hardware, 54mm hardware up to the 54/1706, and the Loki 54/2800 motor.
My Endeavor has Quantum tubing, and the only major non-stock modification was fiberglassing the G10 fins to the motor mount (fin can construction photos here).
Normally I fiberglass cardboard of phenolic tubing for my rockets, but I hadn't built a rocket with QT before so I wanted to try it out at least once. Now I want to know how far I can take Lunch Money, and am hoping for more specific answers based on real-world flights with QT, rather than rules of thumb (like 0.85 Mach).
So, a couple questions:
- What's the largest motor you've flown a PML Endeavor (preferably with Quantum tubing) or a similar 4" rocket with Quantum tubing on?
- What's the largest motor you've flown an Endeavor or similar rocket on if you reinforce the body (drogue bay and main parachute bay) with phenolic couplers?
And here's some data to help the discussion out (took a little while to format). I ran a number of Rocksim simulations, and have ordered here by velocity, with mach numbers calculated by dividing the velocity by the speed of sound, in this case 1,125 feet/sec:
Motor--|-Altitude (ft)-|-Velocity (ft/sec)-|-Mach #--|-Accel (ft/sec2)
L1400--|--8837---------|-1503--------------|-1.34----|-1148
K700---|--8601---------|-1206--------------|-1.07----|--729
K1100--|--6949---------|-1193--------------|-1.06----|-1290
K550---|--7401---------|-1040--------------|-0.92----|--654
K350---|-10965---------|-1035--------------|-0.92----|--817
J800---|--6120---------|-1021--------------|-0.91----|-1069
K270---|-10048---------|--926--------------|-0.82----|--266
J570---|--5284---------|--840--------------|-0.75----|-1052
J415---|--5979---------|--830--------------|-0.74----|--443
K185---|--6889---------|--726--------------|-0.65----|--249
J460---|--4190---------|--689--------------|-0.61----|--524
J135---|--5608---------|--652--------------|-0.58----|--198
J275---|--4189---------|--634--------------|-0.56----|--299
J350---|--3690---------|--619--------------|-0.55----|--675
I435---|--2914---------|--530--------------|-0.47----|--785
L1400--|--8837---------|-1503--------------|-1.34----|-1148
K700---|--8601---------|-1206--------------|-1.07----|--729
K1100--|--6949---------|-1193--------------|-1.06----|-1290
K550---|--7401---------|-1040--------------|-0.92----|--654
K350---|-10965---------|-1035--------------|-0.92----|--817
J800---|--6120---------|-1021--------------|-0.91----|-1069
K270---|-10048---------|--926--------------|-0.82----|--266
J570---|--5284---------|--840--------------|-0.75----|-1052
J415---|--5979---------|--830--------------|-0.74----|--443
K185---|--6889---------|--726--------------|-0.65----|--249
J460---|--4190---------|--689--------------|-0.61----|--524
J135---|--5608---------|--652--------------|-0.58----|--198
J275---|--4189---------|--634--------------|-0.56----|--299
J350---|--3690---------|--619--------------|-0.55----|--675
I435---|--2914---------|--530--------------|-0.47----|--785
Thanks!