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Eggtimer Proton Airstart Quick Reference
General Rules for Successful Airstarts
SIMULATE EVERYTHING FIRST!!!
Your booster motor's thrust:weight ratio should ideally be 10:1 or above.
Your separation time should be at least 120% of the motor's burn time.
You should fire the sustainer's igniter at least ½ second after separation, longer is OK.
Don't use high-thrust motors like VMax's in the booster.
If you expect your booster to get you near mach, increase the sample rate and reduce the
LDA altitude to ensure that the timer is triggered.
Use an altitude or velocity qualification if your booster motor's thrust:weight is < 10:1 or
your stability is < 2C, or if you're waiting an extended amount of time before firing the
sustainer motor.
Proton Airstart Functions
Drogue/Main Timer:
Values: OFF (default), Nose-Over (Drogue only), 0.3-3.0 by .1 secs, 3.2-9.8 by .2 secs
Controls when after launch the timer will fire the channel
Drogue/Main Min Alt:
Values: OFF (default), 300'-3000' by 100', 3200'-9800' by 200'
Controls the MINIUM ALTITUDE that must have been reached for the channel to
fire
Drogue/Main Alt Chk:
Values: @Timer (default), Anytime
Controls when the ALTITUDE CHECK is performed:
@ Timer: When the timer expires
Anytime: Anytime up to when the timer expires
Drogue/Main Min Vel.:
Values: OFF (default), 100-1000 fps by 100 fps, 1200-2000 fps by 200 fps
Controls the MINIMUM VELOCITY that must have been reached for the channel to fire
Drogue/Main Vel. Chk:
Values: @Timer (default), Anytime
Controls when the VELOCITY CHECK is performed:
@ Timer: When the timer expires
Anytime: Anytime up to when the timer expires
Drogue/Main Pulse Width:
Values: 1-9 sec (default 2 sec)
Controls the amount of time that the channel fires
Drogue/Main Use BW:
Values: NO (default), Yes
Controls whether or not the hardware breakwire is tested at firing time
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