This is a 2 stage rocket design o' me own all made from 3” Blue tube. T' First stage booster has two 29 mm engines and t' 2nd stage has a 38mm engine. It’s duel deployment runnin' a Raven 3 with a RockeTiltometer , all that in a 3” tube is a lot but can be done by usin' both sides o' t' sled. This is quite t' most complex rocket by far I’ve built. I’m findin' out that Rocksim is havin' a hard time with t' booster. Aye aye! Blimey! When unloadin' one engine it still shows me t' 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 t' booster and Aerotech H245 in t' second stage. I’m goin' t' fly it without t' booster first with a I218R t' make sure it flies straight and we’ll go from there. Pucker factor should be high!
This is me first flame job and I was very happy with it, shiver me timbers, nay bilge-suckin' t' be done with spray can paint! I think it will look really hot on t' pad!
Weight Dry W/booster - 86 oz.
Weight Dry W/O booster - 72 oz.
More t' come!
| Flight Date: | 2013-08-24 |
| Rocket Name: | 222 (Scratch built 2 stage) |
| Flyer's Name: | Rodney Earp |
| Motors: | H242 |
| Expected Altitude: | 1,300 Feet |
| Wind Speed: | 10.00 mph |
| Launch Site: | RDRC |
| Actual Altitude: | 1,030 Feet |
This was a test flight just t' make sure t' rocket was stable. Lookin' at t' video t' Aerotech H242 launched it off t' rail at a very good speed, even with a 10mph wind. It didn't go as high as it Simed but we did lean into t' wind at about a 10deg angle so t' wind could have played a big part in t' low altitude. I also did a small test with t' Roocketiltmeter and log said eveythin' worked and fired t' secend stage igniter, but it don't seem t' be burned. got a mystery t' work on.
Update: My mystery was nay a big one. Blimey! t' 9v battery that fires t' igniter be a little less than 9v, it was 3.4v. Didn't think that a few test would have run it down so far. Ya scallywag! I'll need t' check before each flight and maybe even replace. I've read about t' plates o' t' battery gettin' missed up durin' high G launches.
T' graf and summary from t' Raven 3 is below. Avast! Blimey! Next with t' booster on 2 CTI G250
\Raven 3 files\2 Stage flight 1 wo booster.FIPa
Average PreLaunch Altitude (ft) = Val: 32.00
Average PreLaunch Axial (Gs) = Val: 1.04
Average PreLaunch Axial Offset = Val: 1.04
Axial Accel (Gs) = Min: -0.55 Max: 11.34
Baro (Atm) = Min: 0.9621 Max: 0.9988
Current Draw (A) = Min: 0.13 Max: 0.13
Flight Count = Val: 66.00
Lateral Accel (Gs) = Min: -0.88 Max: 1.12
Motor Ignition Time (sec) = Val: 0.155
Temperature (F) = Min: 83.27 Max: 83.40
Time (sec) = Min: 0.000 Max: 9.030
Velocity (Accel-Ft/Sec) = Min: 0 Max: 275
Volts Battery (V) = Min: 8.24 Max: 8.26
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: 8.28 Max: 8.30
Volts Pyro Main (V) = Min: 8.32 Max: 8.32
[Altitude (Accel-Ft)] = Min: 0 Max: 1062
[Altitude (Baro-Ft-AGL)] = Min: 2 Max: 1033
[Altitude (Baro-Ft-ASL)] = Min: 34 Max: 1065
[Velocity (Accel-Ft/Sec)] = Min: -35 Max: 272
[Velocity (Accel-MPH)] = Min: -24 Max: 185
| Stage | Motor(s) |
|---|---|
| 1 | Aerotech H242T |
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