Flight Log - 2014-04-26 - Rodney Earp's 222 (Scratch built 2 stage)

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: 2014-04-26
Rocket Name: 222 (Scratch built 2 stage)
Flyer's Name: Rodney Earp
Motors: 2xG250/H178
Launch Site: ROCC
Actual Altitude: 2,789.00 Feet

Nice flight! Wished I waited till dusk when it was darker. the dark matter motor would have been much better.


FILE: C:\Users\Misha\Desktop\Raven 3\April 26 2014 222.FIPa


Average PreLaunch Altitude (ft)               = Val: 355.00    

Average PreLaunch Axial (Gs)                  = Val: 1.09      

Average PreLaunch Axial Offset                = Val: 1.09      

Axial Accel (Gs)                              = Min: -1.13      Max: 20.55      

Baro (Atm)                                    = Min: 0.8915     Max: 0.9872     

Current Draw (A)                              = Min: 0.13       Max: 0.25       

Flight Count                                  = Val: 76.00     

Lateral Accel (Gs)                            = Min: -3.95      Max: 2.50       

Motor Ignition Time (sec)                     = Val: 0.153     

Temperature (F)                               = Min: 95.78      Max: 96.12      

Time (sec)                                    = Min: 0.000      Max: 15.130     

Velocity (Accel-Ft/Sec)                       = Min: -1         Max: 425        

Volts Battery (V)                             = Min: 8.24       Max: 8.26       

Volts Pyro 3rd (V)                            = Min: 0.00       Max: 8.30       

Volts Pyro 4th (V)                            = Min: 0.00       Max: 3.19       

Volts Pyro Apogee (V)                         = Min: 8.26       Max: 8.28       

Volts Pyro Main (V)                           = Min: 8.28       Max: 8.34       

[Altitude (Accel-Ft)]                         = Min: 0          Max: 2804       

[Altitude (Baro-Ft-AGL)]                      = Min: 0          Max: 2789       

[Altitude (Baro-Ft-ASL)]                      = Min: 355        Max: 3144       

[Velocity (Accel-Ft/Sec)]                     = Min: -33        Max: 417        

[Velocity (Accel-MPH)]                        = Min: -23        Max: 284        

12 x CTI 110G250-14A
2Aerotech H178DM


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