Just curious as how things are going for various TARC launches and what teams are turning in for scores. What kind of configurations are you seeing for motors and what kind of results are they getting.
Just a thought on designs that I've been an observer for;
Two of the teams here used a clustered booster of Estes motors that didn't work as planned. Both of those flights had problems with the cluster lighting all motors. Yes, a 12V car battery was used to make sure to fire all igniters, which they all did from inspection. All booster motors fired except one on both, and threw the flight off. This is a major hazard waiting to happen for those of you that haven't seen this happen. I think that it would be an excellent addition for NAR to advise teams of the possible dangers of this happening just as a precaution. Maybe they have, and I didn't catch it. The big problem is that when you have BP clusters, any motors that don't light, fire when the other motors ignite the second stage and burn from the top down. Both times this happened, and it started fires from the 3rd/4th motor in the booster burning as it hit the ground, torching the grass. Another problem is that if the team uses an Estes E motor in the upper stage, the burn time is so long that the flight is already underpowered and heading south after getting up a short ways, and the motor is still burning as the rocket hits the ground, and it also (possibly, happened on one) starts a fire.
Nothing like being prepared with fire extinguishers.
It's just my .02, but I think it would be a great idea if NAR put together a summary or short technical paper on igniters and staging for TARC contestants. It wouldn't be telling them how to stage, but cover the technical details of types of igniters; wire gauge, current requirements, etc. along with minor details of proper igniter installation techniques for both composite and BP motors. If this small amount of information was readily available to teams, I think there would be a lot more successful flights, not to mention the safety benefits.
Just my .02
-Boomer