Throttle Curves

[JimClark]

Can anyone shed some light on throttle curves? My Hacker Navy ESC's offer three choices Logarithmical Linear and Exponential. Can anyone tell me what the difference's might be or which would be the best for hydros?

Jim

[G Doggett]

I wish I could draw a picture of a graph here as it would be easier to understand, but here goes with words.
Linear throttle setting is the usual with the 'throttle' opening matching the radio transmitter stick or trigger, ie 1/4 trigger movement = 1/4 throttle, 1/2 trigger movement = 1/2 trottle movement etc.
On a graph it is a straight line.
Logarithmic has a curved line on the graph, starting off gently but increasing rapidly towards the top end.
With this set up initial movement of the transmitter will have only a small movement of the throttle , but this will gradually increase to be very rapid at the end as it approached full throttle.
Exponential ( I think) is the opposite with the curve being rapid at the start but decreasing at the top.
With this set up initial movement of the transmitter will have rapid movement of the throttle which will gradually decrease as it approaches full throttle.
I would stick with the usual linear setting as the only reason I can think of for using logarithmic would be to tame an ESC that tends to power up from rest too quickly.
I haven't a clue why you would use exponential.
Does that make sense ?
Graham.

[JimClark]

sure does thanks Graham

Jim