shrewdPanther46 wrote:Hi guys,
I know I'm double posting, but I think its ok because its on a different thread lol
So our car has a unique issue. Our first run (obviously after sitting at impound for some time) goes about 20 cm under the second run witht he same windings. In other words, our car isn't "warmed up" prior to the first run and it falls about 20cm short of our expected distance every time. And then the second run, if we wind the same way, it goes within 5 cm of target distance.
This only happens during our first run of our practice session, or the first run at competition after our car sits at impound. Afterwards (at practice) our car behaves much more consistently. At states, we wound 20 cm over for the first run and wound up 6 cm slightly in front and far to the right. But that left us clueless for winding/predicting the second run.
We suspect one main issue which we fixed in our new design (which hasn't been properly tested as it skids wayyy too much). We currently stop our wingnut against a 3d printed stopper. The "forks" of the wingnut (NOT the flat side, the opposite side) make contact with the 3d printed part (in two unique spots), and it created holes in it (in two spots, which are hit every time). We filled the holes with CA glue, and thoroughly tested it assuming it was being compressed each time. We feel that the glue filling the holes more or less "expands" or returns to normal after a period of time, and then for our second run (and all future runs at practice) we think the glue is compressed (which is what we intended to happen the entire time) and our wingnut is hitting it and continuing for different distances. This is just our theory.
On our new design, we are braking the FLAT end of the wingnut against a 3d printed part of the same size, and we are hoping the part itself wont compress, and that there would be no holes that require filling.
Suggestions? Advice? Thoughts?
cheese wrote:yeah maybe the first place team will be in the negative teens, and that would probably be mostly luck, where the rest will be in the single digits and negatives
Users browsing this forum: No registered users and 1 guest