When you rebuild, will you do anything different? I mean other than the battery connector. Sometimes the building process can spark creativity.
John Carmack wrote: > Everything was going well, operating at the Oklahoma Spaceport was working > out great, the water test and engine warmups were fine, the liftoff was > fine, ... > > Then the rocket started pitching over, did a complete flip, and crashed > into the ground from a couple hundred feet up. > > Telemetry had ceased from the rocket after the first second at full > throttle, and apparently an attitude engine had stuck on. The telemetry > did show a precipitous drop in the battery voltage from 12.1v to 8v in the > last half second before failing. At first, I was worried that something > might have shorted, and drained the battery rapidly. When we got the > electronics box out of the rocket, one of the battery connectors was not > on. It might have happened during the crash, as there was quite a bit of > general destruction, but the battery still had 12v on it, so we have strong > evidence that the connector wiggled off during flight. > > I have always been a little worried about the fast-on connectors on the > batteries we use, and this clinches it. If I can't find batteries in the > size we need with ring terminals, we are going to solder the fast-ons > directly to the batteries. We are also going to make a redundant battery > power supply. > > Starting on a new frame tomorrow, and hoping that the inertial unit is > undamaged. Sigh. A few other good lessons learned, more in the update > this weekend. > > John Carmack > > _______________________________________________ > ERPS-list mailing list > [EMAIL PROTECTED] > http://lists.erps.org/mailman/listinfo/erps-list -- >>>>>>>>>>>>>>>>----<<<<<<<<<<<<<<<<< ........ Alex Fraser N3DER ......... ......... [EMAIL PROTECTED] ....... [~]_>^</\-[~]_>^</\-[~]_>^</\-[~]_>^< _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
