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[[!meta title="2011-07-31 - Attempted July Launch"]]

# July Launch of LV2.3

July 31st 2011 we headed to central Oregon to launch our rocket with the same roll control as the previous launch, but this time with much of the full flight computer we have been planning for years in in place and running. This included the PowerPC flight computer, a Hemisphere Crescent GPS receiver board, and our new 2.4 GHz Amateur TV broadcast system with overlay.

Unfortunately the rocket motor failed on ignition, ejecting the fuel (unburnt) from the motor casing. The force of the depressurization lifted the rocket off of the launch rails, to about 30-40 feet into the air. Although the drogue parachute did eject, the rocket came down fairly hard and suffered minor damage to the fin canister and aeroshell.

## Launch Day

### Photos

### Video

#### 600 FPS High Speed Footage

<iframe width="560" height="349" src="http://www.youtube.com/embed/Ec4O_WJps8Y" frameborder="0" allowfullscreen></iframe>

- Download Original (7MB) [[lv2-2011-07-31-600fps.mov]]

# Failure Analysis

### Critical failures

- Motor CATO

### Major failures

- The DVR did not record anything on 7/31. The last recording on the SD card was from 2011/07/27 12:32:12 AM PDT, which was when we packed it up for flight in the PSBA. When the payload module was opened for the first time after flight on 2011/08/01 17:20 PM PDT, the slide switch was found to be on (including both blue and red sections of the switch) and the battery was completely discharged. We assume it was never turned off by the recovery team. More disturbingly, the 8 GB SD card had ejected from the slot and was hanging out of the card slot. We assume the card was ejected on CATO or on impact  why there was absolutely no video at all is a mystery: the DVR should have recorded until the battery died or the card was ejected. Why there's *no* files at all from the launch day is strange. The record switch was in the "record" position, the battery was charged the night before, and the camera jack looked plugged in. It's as if it just never ran.

### Minor failures

- The rocket was out of frame in the high speed camera. We could not see the liftoff or any detail of the motor failure.
- The blue tape with the rotary switch markings was left on the rocket for flight.


[[!tag announcement]]