Page 1 of 1

Odd thing

Posted: Mar 14 2019 1:46pm
by Lee30
Odd thing. This only does it at 20mph? Say I am travelling along on a flat road, motor power only. I get up to 20mph and keep it there for a short while, then reduce the throttle slightly, even though the power meter says that I have reduced power, I am still doing 20mph? Ok, 15 mph reads 3 bars on the meter, 20 mph, 4 bars initially, but after a short while, I can get it down to 3 bars, still doing 20 mph?

Re: Odd thing

Posted: Mar 14 2019 8:50pm
by JBG
Of course that’s what’s happening. It takes more power to accelerate than to maintain speed.

Re: Odd thing

Posted: Mar 15 2019 7:33am
by dogman dan
And the motor may actually operate more efficiently at 20 mph.

But some of what you are seeing is just a time lag on that type of power meter. So you may be seeing a combination of things, efficiency improving, less needed to maintain 20 mph than it needed to get from 15 to 20 mph, and a small time lag on the input averaging built into the meter.

Re: Odd thing

Posted: Mar 15 2019 9:15am
by neptronix
You should really get a watt/volt/amp metering device. It will teach you a lot about power consumption. Whatever display you have will not indicate much of use ( what does a bar represent, exactly? :roll: ).

These have always been cheap and pretty reliable:

https://hobbyking.com/en_us/turnigy-180 ... lsrc=aw.ds

Re: Odd thing

Posted: Mar 16 2019 10:09am
by MadRhino
neptronix wrote:
Mar 15 2019 9:15am

... what does a bar represent, exactly? :roll: ).
:lowbatt:
14.5 psi ?
:mrgreen: