36120 or 3695 + Neu 1512 2Y/F - RC-Monster Forums

joeling · 04:37 AM

Hi,

I am looking for my next BL setup for a buggy & I'm considering either the BK36120 or 3695 in combination with a Neu 1512 2Y/F (1400kv) motor using 8S 4000mAH 20C lipo. Do you think this combination will work out ok ?

I've tried the lower voltage - higher current route but have only met with limited success as I live in the tropics where temperature & humidity is relatively higher.

In addition, I read that the rpm limit of the 36120 is 42000 while there is no indication for the 3695. How hard & fast is this spec. ?

Regards,
Joe Ling

starscream · 01.24.2007, 04:53 AM

I believe the 3695 doesn't have the 42k limit but its wise not to run a BL motor much higher than that. 30-40k RPM is the most efficient range for most motors.

Also, the BK controllers don't run well with 4 Pole motors like the NEU motors.
You would be beter off running a Lehner 1950 with a BK esc.

I am still waiting for my MGM 12032 to arrive so I can try 8S out with my 12XL. The MGM should arrive soon.

crazyjr · 01.24.2007, 05:09 AM

Quote:

Originally Posted by starscream

I am still waiting for my MGM 12032 to arrive so I can try 8S out with my 12XL. The MGM should arrive soon.

Is that a car or plane esc?

starscream · 01.24.2007, 05:34 AM

Its the hydro version so it should work with my Transmitter.

crazyjr · 01.24.2007, 05:43 AM

OK cool, Looks like more powerful setups are coming from everywhere

joeling · 01.24.2007, 08:09 AM

Hi starscream & crazyjr,

Thanks for your advice. Looking at the Lehners, I am now thinking of 1940 10 turn with a 1568kv. Assuming that each cell is 3.2V under load, total voltage under load will be 25.6V. This means max rpm of around 40K assuming no loss of efficiency. Is this a practical assumption ?

Looking at the constant amperage / power figures, the 1940 is rated at 1450W. Using the simple formula P=VA, one gets a current load of around 57A. Of course under instantaneous load, the figure would be higher. Again, is this a fair assumption ?

High amps = high heat = death of esc. This has been my experience so far. So, I am hoping the higher voltage lower amperage setup will work for me.

Regards,
Joe Ling

Serum · 01.24.2007, 10:53 AM

Both speedo's don't work with the Neu motors.

joeling · 01.24.2007, 11:08 AM

Hi Serum,

Yeah, the 2 gentlemen already convinced me that Neu won't work with BK. I am looking at the Lehner 1940 or maybe cheap out & get a 12XL.

I've already killed 3 BK9920, 2 Quark 125 & 1 MGM 160. Hunting down another 9920, & trying to add a 12020 to the kill list (hopefully not though).

So, forcing myself to look at high volt low amp approach but choices of esc is pretty limited.

Regards,
Joe Ling

01:45 PM

Joe,

I'm also after an HV setup running 8S. I am probably going to go for an MGM 16024 ESC with a Neu motor. Have you looked at this ESC?

Regards,
Aragon

edit: oh, you already killed one... nevermind :o