CRT.5 build - would opinions on my setup choices

[Mailman]

Originally Posted by VintageMA

dway - Comments like this without any technical support on the statement don't carry much weight around here. Do you have any technical reasoning behind your comments?

I think BrianG answered this for me -(I had my user name changed from dway)
There is nothing "technical" about it I was just stating my personal opinion. If you don't mind running a 6.6v battery and getting poor performance but longer run times , or a 2300mah battery and getting better performance but lower run times then go ahead. I can understand wanting to do it for the safety aspect of it, but either your performance or your run time will suffer. The only reason I suggested a lipo was that you get the voltage needed and run time too.

[VintageMA]

Originally Posted by Mailman

I think BrianG answered this for me -(I had my user name changed from dway)
There is nothing "technical" about it I was just stating my personal opinion. If you don't mind running a 6.6v battery and getting poor performance but longer run times , or a 2300mah battery and getting better performance but lower run times then go ahead. I can understand wanting to do it for the safety aspect of it, but either your performance or your run time will suffer. The only reason I suggested a lipo was that you get the voltage needed and run time too.

Trust me - I am a big LiPo fan - I've probably spent $2K on LiPos alone in the past 2 years. But after having $500 worth of (well cared for and balanced regularly) balloon on me - it's time to try something a little different and see how it works. I went with the 4S config on the A123s because that's the closest to 3S Lipo - so I obviously want the performance.

We'll see - maybe I'll end up using the 3S 5KmAh MaxAmps pack in the long run. I plan to setup with a battery mount that will support both.

And if I set the MM for a 9Volt cutoff I will be able to interchange either the A123s or the LiPo w/o making any changes to the cutoff on the ESC. For 3S lipo it will be right on the mark at 3v/cell and for the A123 it will be just a touch higher than the recommended 2V @ 2.25v/cell.

Give it a month to have everything shipped and we'll see.

cemetery gates - what gearing are you using with the 10L and what brand is the motor? I've noticed the Feiago motors will tend to pull higher power spikes than the LMT/Neu's with the stronger magnets.

Originally Posted by VintageMA

cemetery gates - what gearing are you using with the 10L and what brand is the motor? I've noticed the Feiago motors will tend to pull higher power spikes than the LMT/Neu's with the stronger magnets.

It is a feigao 10L geared 20/46 (tops out at 39, radared). In my revo with a neu 1515 1y on 4s and I get many 120+ amp spikes. In your case you are running 6s with a lower kv motor so, you will pull less amps...

Bye

[VintageMA]

To move back on track with my original post - the parts are coming in.

Got the Hacker B50 8L today - feels like a nice solid motor. Not a Feiago but not quite a LMT/Neu either.

Got the motor mount and pinions in from Mike - very quick shipping as always!

Got the A123 batteries and charger - the A123s seems like some solid cells. Small issue with the charger though - it let it's smoke out ;) Hooked it up to me DC power supply and the lights were wigging out on the charger. Played around with it for a bit and when I went to hook it up the second time and tried tohook up a battery for charging a puff of smoke came out of the front of the charger. A123Racing has alrady agreed to repair it at no charge if I send it in, but considering it is dead out of the box and am trying to see if Horizon Hobby will do an RMA first before I send it in to A123.

Guess I'll be starting the build and testing this out with the 3S 5k mAh lipos anyway.

Now all I need is the buggy - FedEx Ground coming from CA seems to be taking a while - was hoping to have it for the long weekend.

[VintageMA]

Good support from Horizon Hobby - they are arranging a RMA for the charger.