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: | 2013-09-01 |
| Rocket Name: | 222 (Scratch built 2 stage) |
| Flyer's Name: | Rodney Earp |
| Motors: | 2xG250-2/H112-N/A |
| Expected Altitude: | 3,000 Feet |
| Wind Speed: | 8.00 mph |
| Launch Site: | ROSCO |
| Actual Altitude: | 2,474 Feet |
A Little windy today, but still flew well and stright, very happy with this rocket. can't wait to fly it again at ROCC. I changed the main to a H112J to get a little more darker smoke on the 2nd stage. didn't change any of the config, it took a little longer to lite and the speed droped to about 100 FPS. Still stable and flew well and looked good.
\Raven 3 files\2stage 9-1-2013, 2-G250, H112J.FIPa
Average PreLaunch Altitude (ft) = Val: 143.00
Average PreLaunch Axial (Gs) = Val: 1.18
Average PreLaunch Axial Offset = Val: 1.18
Axial Accel (Gs) = Min: -0.59 Max: 20.64
Baro (Atm) = Min: 0.9138 Max: 0.9948
Current Draw (A) = Min: 0.13 Max: 0.25
Flight Count = Val: 74.00
Lateral Accel (Gs) = Min: -3.46 Max: 3.46
Motor Ignition Time (sec) = Val: 0.155
Temperature (F) = Min: 108.27 Max: 108.39
Time (sec) = Min: 0.000 Max: 14.730
Velocity (Accel-Ft/Sec) = Min: -1 Max: 335
Volts Battery (V) = Min: 0.00 Max: 8.22
Volts Pyro 3rd (V) = Min: 0.00 Max: 0.00
Volts Pyro 4th (V) = Min: 0.00 Max: 3.19
Volts Pyro Apogee (V) = Min: 8.12 Max: 8.16
Volts Pyro Main (V) = Min: 8.16 Max: 8.20
[Altitude (Accel-Ft)] = Min: 0 Max: 2309
[Altitude (Baro-Ft-AGL)] = Min: 0 Max: 2331
[Altitude (Baro-Ft-ASL)] = Min: 143 Max: 2474
[Velocity (Accel-Ft/Sec)] = Min: -31 Max: 324
[Velocity (Accel-MPH)] = Min: -21 Max: 221
| Stage | Motor(s) |
|---|---|
| 1 | 2 x CTI 110G250-14A-2 |
| 2 | Aerotech H112J-N/A |
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