litespeed said:
For us not so techy guys I think this what we need. Most of us can do the mechanical parts of building mounts, gearing etc.... but the motor and controller quality, setup and rest of those details keeps most of us stuck on the bench.
I do not have the full amount to buy the whole set up but could help in a group purchase to get testing done....
If the Revolt guys know there product is good and want to sell a bunch this would be mutually beneficial to both them and us. Possibly a cheaper "test" subject could be purchased.
Can they think of a better way to advertise their product?
Tom
macribs said:
Let me check if I understood you correctly Toolman2.
You are proposing a group buy of 120 or 160 motors. Before we put in the actual order you will get 1 motor to test it to check if the specs claimed by manufacturer are the real truth.
We as a group pay for the test motor together, so the cost of the test motor divided by number of buyers? And this we pay now upfront, which seems fine as it will give us a true test in return. Then if motor pass your test we each pay for as many motors we need and group buy is completed?
If this is the case I will be in for at least 1 x Rv 160, possible 2 x Rv 160.
Wheazel said:
Also willing to contribute to a quality test of either the 120 or 160.
Depending on results I might want more than the 120pro I have already.
+crossbreak etc, Thanks for the response guys, been a bit flat out lately sorting the joby with a remote hall sensor setup, but myself and SplinterOZ are (hopefully) underway to fund the EV dyno retarder control/software package ourselves with maby a few guys here in OZ who then get free access to use it. So thinking about it macribs, it would help the whole process along if you are prepared to do the buy (and the own if the resulting performance meets your needs, or stated spec) -initially in my post i had in mind to buy a revolt 160pro long myself to kick the testing off but if your up for it then i can put more time and funds into completing the dyno and that would be awesome. Going off the stated specs (of 12kw continuous and 20 peak) and hopefully paypal? then its a safe investment, so yes lets make it happen.
In general i don't mind how we get various motors for testing but it makes sense that whoever is close enough to pulling the trigger (as we all often do) does so and it takes the round trip for testing and then to its rightful home. Any group buy would then be a separate matter but aspects of the motor may be found that require changes and its likely to be a far easier thing to get rolling when people are informed and know the real deal about what they are going to get, controller types and settings that work and how to set it up WRT gearing/voltage etc etc. Getting solid and reliable output power from 'difficult to drive' motors has been my thing for many years now but the sheer volume of naysayers posting on this challenging subject normally make the racetrack my preferred option, if we go this way though we can all share in the findings and i like to think that relatively small, light and powerful but slightly more challenging motors can then be put into use buy all of us with whatever package of controller, settings and gearing etc that is appropriate and proven to work.
So yep, lets stop sitting on the fence and do this -if folks are prepared to send a revolt, ill need the halls right for the test so will sort out them with new honeywells placed accurately (TBH ive rarely had a motor arrive with the halls well enough placed for good performance) and ill pay for the postage to get it back to you -or the factory
Heres an idea of the efforts required recently to get good clean hall signals to drive the joby, the motor is now reaching 10700 rpm (118k e-rpm) and higher currents than we have previously run and theres a vid of us checking the standing start performance when geared tall in preparation for an upcoming event on a tarmac go-cart track.
https://youtu.be/_Y-_i24yV44
[youtube]_Y-_i24yV44[/youtube]
nice!