Experience needed regarding FW Beater and Armor

[Runsler]

Damn... didn't realize Titanium would be that complicated (regarding the bearings and stuff) and that expensive...
Also good remarks about the stability of the motor, didn't think about that. Also, i believed maximum power for two secounds would be good enough (to spin up once) and to hold it on a good level much less would be needed, anyway. But if you've seen those things blow of with similar characteristics, i'll take that experience and rethink that...
(Oh, and i know where we were different when talking about the length of the belt, you took total length, i was just looking for one way, since it is symmetrical)

Putting the Motor to one side would be an option, i just like symmetry, and believed with the pulley in the middle, it would be less likely to get cut off if anything attacks from the side. But seems like i would have to let go of that idea, not going to build something THAT expensive as a first try robot when it will most likely not even be really good and the expensive part is so "special" i can't possibly reuse it in a better/later build. quiet sad now, design was planned out so far with 1.6kg left for pulleys, wires and (some of the) bolts, without any pocketing and other weight-reducing stuff. Hoped that would be a reachable thing.

Also, that thing would have stored about 2000J with the last design. Not that much, but if the weight is there i somewhere read a slower weapon with the same energy stored would be stronger than a faster one, since it has more bite.



Anyway, even though i am a bit sad now, that was some really helpful advice, and i am glad you wrote all that stuff.
Regarding the "be nice policy", being nice to me is pointing out the problems with my plans, after all that's why i am asking here.

Well... need something different now. Weapon about the same diameter and (with axis) same length, but motor on one side not the middle, weight limit for the weapon 5kg, this time hopefully not from Titanium. Without the motor on the inside, maybe even a drum would be possible, only i have no idea how drums are made. just milled out from one solid block? Was originally going for a beater since the bot was going to be wide and a beater seemed easier to make... well... easy... yeah... also with a beater i would have had a name for it.^^
Okay, time to pause the weapon stuff for a moment until i did some more research and come up with a new idea and possibly show some scetches this time right away, so you could say what i have done wrong that time.


But for fastening HDPE, i have actually no idea what you mean by "barrel bolt". Google only give me those bolts to lock doors when i search for it, and my dictionary seems to fail me on this one. Do you have a picture of one, or maybe a different name?