This is a 2 stage rocket design of my own all made from 3” Blue tube. The First stage booster has two 29 mm engines and the 2nd stage has a 38mm engine. It’s duel deployment running a Raven 3 with a RockeTiltometer , all that in a 3” tube is a lot but can be done by using both sides of the sled. This is quite the most complex rocket by far I’ve built. I’m finding out that Rocksim is having a hard time with the booster. When unloading one engine it still shows me the results as if both were loaded and I can’t get a good feel for what loads would be safe if 1 didn’t light. I Finally decided that I’ll use 2 CTI G250 two grain VMAX motors in the booster and Aerotech H245 in the second stage. I’m going to fly it without the booster first with a I218R to make sure it flies straight and we’ll go from there. Pucker factor should be high!
This is my first flame job and I was very happy with it, not bad to be done with spray can paint! I think it will look really hot on the pad!
Weight Dry W/booster - 86 oz.
Weight Dry W/O booster - 72 oz.
More to come!
| Flight Date: | 2013-12-21 |
| Rocket Name: | 222 (Scratch built 2 stage) |
| Flyer's Name: | Rodney Earp |
| Motors: | 2xG250/I225 |
| Expected Altitude: | 3,000 Feet |
| Wind Speed: | 10.00 mph |
| Launch Site: | ROCC |
| Actual Altitude: | 3,119 Feet |
Another great flight. both G250 were together and had no wobble this time. The new circuit for the charge to blow the booster off went at 1 sec and then the I226FJ took it on. Everything worked is planned and even with wind the recovery was easy, about 300' from pad
FILE: C:\Users\Misha\Desktop\Raven 3\Dec 21 2014 222.FIPa
Average PreLaunch Altitude (ft) = Val: 265.00
Average PreLaunch Axial (Gs) = Val: 1.08
Average PreLaunch Axial Offset = Val: 1.08
Axial Accel (Gs) = Min: -4.69 Max: 60.61
Baro (Atm) = Min: 0.8870 Max: 0.9906
Current Draw (A) = Min: 0.13 Max: 0.13
Flight Count = Val: 75.00
Lateral Accel (Gs) = Min: -2.98 Max: 2.98
Motor Ignition Time (sec) = Val: 0.155
Temperature (F) = Min: 89.27 Max: 89.67
Time (sec) = Min: 0.000 Max: 15.830
Velocity (Accel-Ft/Sec) = Min: 0 Max: 486
Volts Battery (V) = Min: 8.12 Max: 8.14
Volts Pyro 3rd (V) = Min: 0.00 Max: 8.16
Volts Pyro 4th (V) = Min: 0.00 Max: 3.19
Volts Pyro Apogee (V) = Min: 8.14 Max: 8.16
Volts Pyro Main (V) = Min: 8.16 Max: 8.18
[Altitude (Accel-Ft)] = Min: 0 Max: 3119
[Altitude (Baro-Ft-AGL)] = Min: -3 Max: 3014
[Altitude (Baro-Ft-ASL)] = Min: 262 Max: 3279
[Velocity (Accel-Ft/Sec)] = Min: -40 Max: 477
[Velocity (Accel-MPH)] = Min: -27 Max: 325
| Stage | Motor(s) |
|---|---|
| 1 | 2 x CTI 110G250-14A |
| 2 | Aerotech I225FJ |
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