User`s manual

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Count the number of beeps to see what caused the error (there may be more than one error)
Take the rocket off the rod/rail, open up the payload bay, disconnect all batteries, and fix the
failed condition. Then, you can start all over having hopefully learned one more thing to check
in the future…
You can see that if you’re doing multiple deployments, it’s a lot more involved than just stuffing
some wadding and the parachute into the tube, popping in the motor, and hooking up the igniter.
Multiple deployments require discipline in order to make them work reliably; we’ve seen way more
than our share of failed deployments, on everything from a small mid-power E-size rocket all the
way up to an M-sized 200 pound beast. We’ve seen deployments fail with the top-end flight
computers and with the low-cost units, even with redundancy. The reality is that most deployment
failures are not the fault of the electronics; it’s usually something mechanical like a bad connection,
a nose cone that’s too tight, etc. Having your blood, sweat, and tears free-fall from a few thousand
feet and bury itself in six feet of dirt is going to ruin your whole day.
We STRONGLY recommend that you use a checklist every flight so that you don’t forget anything.
We have some on our website under the Downloads section (at
www.eggtimerrocketry.com/downloads ) or you can create your own… the main thing is that you
NEED to use one. There are also plenty of other resources online, Google is great for finding them.
We also recommend that you get a copy of the book Modern High Power Rocketry , it’s full of good
information too, and subscribing to a forum like The Rocket Forum (www.rocketryforum.com) is a
really good idea, too.
The Eggtimer TRS Flight Sequence
At the Pad…
As you know by now, when you first turn on the Eggtimer TRS you get a long “I’m on” beep
followed by 45 seconds of slow beep-beeps to indicate that you’re in pairing mode, then 30 seconds
of faster beep-beeps for cabled programming mode. When you’re at the pad and the programming
beeps stop or you’ve started a flight from the Save Options screen, that’s when the fun begins…
At that point, the Eggtimer TRS looks at your flight profile to determine what deployment channels
to test, and it does some internal tests as well. If everything is OK, it goes on to the “Ready for
Flight” sequence, indicated by a 10 second long beep. When the Ready for Flight beep stops, you
will hear continuous chirping that indicates that altitude samples are being taken and saved to the
pre-LDA memory, so the rocket may be launched at any time. GPS and altitude data will start
streaming to the data port, and if you have an RF link you will see that data on your monitor or LCD
display.
If the Eggtimer TRS fails a self-test, you will hear a slow beep that counts out the error code instead
of the “Ready for Flight” tone. This means that the Eggtimer TRS has aborted the flight sequence
due to a hardware problem, AND YOU SHOULD NOT LAUNCH. Deactivate the Eggtimer TRS,
disconnect the batteries, disconnect the motor’s igniter, and correct the error before attempting the
flight again. Note that if you have the Eggfinder LCD display paired with your Eggtimer TRS, it
will not allow you to arm the unit if there is an error.