Zoid 9/05 Post Flight Analysis 
 
- Due to a good strong wind, the vehicle wind cocked into it
- High HORIZONTAL velocity at ejection
- At apogee the drogue ejection fired properly drogue deployed
- Payload and Parachute Cannon (PC) separated from the booster
- Payload/PC kept moving at a high velocity
- Bridle between booster and Payload/PC was probably too short (30')
- The 2 Payload sheer pins failed (one sheered, one "rolled over")
- Payload was heavy and it ejected
- Main chute began "leaking out"
- Main chute was a surplus, light weight 14' diameter with 16 static lines
- Main began wrapping up the PC to booster bridal to the drogue chute
- Vehicle fell at 18m/sec  (ouch)
- I followed the decent with bino's and saw (also heard) the main ejection fire (poof and smoke) at 800'
 
 
Conclusion:
 
Great flight, poor deployment, hard landing
 
 
 
Design changes:
 
1. Went to a conventional coupler from the PC which INSERTS into the booster
     (E-bay bolts into the PC coupler section. This was just to make it easier to assemble.)
 
2. Added 2' to the booster to accommodate longer bridle (and can hold a bigger motor in the future)
 
3. Reinforced the inside of the coupler and booster with carbon fiber
 
4. Reduced the weight of the payload section (simplified the electronics and less hardware)
 
5. Now use 3 sheer pins which have a reinforced threaded section on the inside of Payload coupler
    (this assures the pins have a lot of material to "bite" into and thus sheer (won't roll over)
 
6. Booster to PC/Payload section is 45'. The drogue will be connected 15' from the PC to slow it down at separation
 
7. Purchased a TAC-9B L3 parachute for the Main. This chute won't tangle with 4 big nylon webbing static lines. 
 
8. Repaired and reinforced inside with fiberglass the Payload section and forward section of the PC
 
9. Bridle from PC to Main is 22.5' then 15' more to the Payload