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Old Jul 09, 2015, 02:26 PM
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Source of lack of power?

Hi guys, I'm running a Turnigy 28-36 NTM 3000kv w/ 6x4 prop on 3s 2200 on a 60a esc. Everything is pretty good but when I get into the 90% throttle range theres a kind of whine that comes out, similar to when you're near the end of a pack and are using too much throttle, sounds kind of intermitent but constant if that makes sense. Its a relatively new pack rated at 35c discharge, do you think the battery is having trouble supplying the amps?
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Old Jul 09, 2015, 04:06 PM
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6x4 prop is too big for 3000Kv. You are probably exceeding motor, ESC, and the real battery limits. ESC lvc or overamp? ESC settings? What is the system drawing at wot? If you do not have one, get a watt meter. It will help you understand what is happening.
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Old Jul 09, 2015, 06:48 PM
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Quote:
6x4 prop is too big for 3000Kv. You are probably exceeding motor, ESC, and the real battery limits.
PCalc shows 25 amps.

mw
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Old Jul 09, 2015, 06:54 PM
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Quote:
Originally Posted by beginner4life View Post
... I'm running a Turnigy 28-36 NTM 3000kv w/ 6x4 prop on 3s 2200 on a 60a esc. Everything is pretty good but when I get into the 90% throttle range theres a kind of whine that comes out ...
What current did you measure at 90% throttle, i.e. just before the whine starts, and what current at WOT?

Was everything been okay before all this?

Vriendelijke groeten Ron
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Old Jul 09, 2015, 07:47 PM
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Unfortunately I don't have a watt meter. I think it must be the battery because for the first minute of flight, WOT has no whine and tons of power, as flight goes on the "whine" occurs earlier in the throttle range.

Great power from this setup as well if anyone was curious. Has my 50" wing flapping if i rip the elevator too hard at high throttle
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Old Jul 10, 2015, 12:44 AM
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Originally Posted by Mark Wood View Post
PCalc shows 25 amps.

mw

What motor? Did not see the Turnigy 28-36 NTM 3000kv on there. 25amps, Something wrong there.
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Old Jul 10, 2015, 12:46 AM
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Originally Posted by beginner4life View Post
Unfortunately I don't have a watt meter. I think it must be the battery because for the first minute of flight, WOT has no whine and tons of power, as flight goes on the "whine" occurs earlier in the throttle range.

Great power from this setup as well if anyone was curious. Has my 50" wing flapping if i rip the elevator too hard at high throttle
Buy a watt meter. helps with setting up power systems.
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Old Jul 10, 2015, 08:04 AM
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A watt meter will pay for itself, will save you at least one burnt controller, motor and one ruined battery. You need a watt meter for troubleshoothing and best set-up.


Prettig weekend Ron
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