SF esc need help

[darryl whitman]

hi guys , I have a JAE 21 FE , 1515 y1 2200 kv motor, SF 220 pro + esc
an 4s 5000 mah bats, abc 1818 prop .I have a program box for the esc, an I set the timing at 10 deg, what is happening is I start out running strong the 1st
2 laps then she starts slowing down , when I stop an start up again
she runs strong, then again slows down after 2 laps ,
any1 have an idea what is going on , plz help.

[tlandauer]

What battery? Sounds like the voltage is dropping under load and the ESC is reacting to that. I have almost the same set up as you do but my battery is quite new. What is the LVC on your set up?

[Fluid]

The 1818 is pretty aggressive and loads the motor a bunch, so marginal cells will show depressed voltage after a few laps. That may be enough to prompt the LVC to kick in. I assume the ESC is set to a soft cutoff. If you lower the LVC setting to 3.2 volts that may be enough to finish the heat.

My JAE with 1415/1Y likes a modded H-7 and runs 12 second laps, GPS in the mid-70s. Less load than the 1818 too, averaging around 100 amps during a 6-lap heat.


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[darryl whitman]

thanks Fluid. I'll reset the esc an switch props , what modds to your H7?

[SirBudman32]

I run a CC 1515 2200 with a T-180 on 5s in my Jae turning a 1650 back cut. 86.5 mph.

[Fluid]

The H-7 is detongued and cupped at the tips to reduce lift. A bit of extra pitch on the last 1/8" of the blade too.



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[darryl whitman]

I run a CC 1515 2200 with a T-180 on 5s in my Jae turning a 1650 back cut. 86.5 mph.

how did you get a T180 esc in your JAE? LOL is your tub widen?

[SirBudman32]

Yeah just a little. But also turned the cooling block on the 180 90 degrees.