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Broz

Thoughts on an RS build

So after what actually turned out to be a pretty successful pair of builds (follow several... er, learning experiences...) I'm looking at the next projects and after some reading around I was curious as to people's opinion on the following and if there are any likely issues that I need to be aware of.

RS: 2x 180 3S Flywheel motors (MTB Hellcat)
     1x 130 3S Pusher motor (MTB Rhino)

     Replacement cage (mostly because the original ended up as a donor) was thinking this http://www.buychina.com/items/stf...warehouse-warehouse-usosrropnhij#

     Replacement Flywheels, Was thinking these as cheaper then Workers http://www.buychina.com/items/sup...minous-all-positions-rxsrnoopmkhg

With a BSUK switch kit and running on 3S LiHv because I have a few of them now.

I heard anecdotes about issues with 180's on tighter fly wheels causing torque slippage and melting darts, anything I need to give credence to or can I expect to be shooting laser beams with this set up?

I'm also thinking a similar build with MTB Rhinos and a Vector kit on a Stryfe with the eventual intent of adding a full auto kit and having a pair of them.
Dustybin

Run a Turnigy Graphene 3s lipo, you will get much better performance then (it's 9.9v with ? amps vs 11.1v with 90 amps burst). Could you link the battery?
SSGT

Dustybin wrote:
Run a Turnigy Graphene 3s lipo, you will get much better performance then (it's 9.9v with ? amps vs 11.1v with 90 amps burst). Could you link the battery?

LiHV is 3.8V per cell nominal (4.35V per cell full charge) so a 3S LiHV is effectively an 11.4V nominal pack. Performance should be largely similar to a graphene (or even standard LiPo) other than a slight torque and RoF boost. As long as both packs are capable of a supplying a 55+Amp burst (a 2200mAh 3S pack with a 25C or higher burst discharge would be fine) they should be about as good as each other. Unless you're using triple 180s graphene packs are probably a little overkill although that's not necessarily a bad thing.

Broz wrote:

     Replacement cage (mostly because the original ended up as a donor) was thinking this http://www.buychina.com/items/stf...warehouse-warehouse-usosrropnhij#

     Replacement Flywheels, Was thinking these as cheaper then Workers http://www.buychina.com/items/sup...minous-all-positions-rxsrnoopmkhg


I'd personally hang-fire on the cage or, at the very least, the flywheels until they've been properly tested.

Broz wrote:
I heard anecdotes about issues with 180's on tighter fly wheels causing torque slippage and melting darts, anything I need to give credence to or can I expect to be shooting laser beams with this set up?


Ideally you want the flywheels to "slip" on the darts, that's how you get consistent high-velocities (friction, rather than flywheel speed, becomes the limiting factor and friction, for the most part, doesn't change depending on motor load/RoF). A setup that provides greater friction between the flywheels and the darts will however increase dart wear. What has been know to happen with some very high torque motors (mostly XP180s) is that the flywheel/worm gear itself can start slipping on the motor shaft. This shouldn't be an issue with Hellcats or Rhinos though as they use a longer 10mm shaft.
Dustybin

Oops, I misread it, I was thinking of Lifepo4! Sorry SSGT!
Franksie

Honeybadger pusher if you want a dart hose or possibly a hellcat if you want more shot control

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