i used a s/f 240 esc leopard 5692 1090kv x455/3 prop on 8s burnt esc and i yhink motor is ruined to i checked water lines before i ran i have dual pick up rudder one line for esc and one for motor any info will help waited long time to run boat is 42" hydroplane . lipos are zippyflight max 14.8 4s1p 5000 mah 45c x2 in series
just dont know
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i pulled took it apart smells burnt pulled center rotor out put it back together does not feel smooth when i turn it over by handComment
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That is ALOT of prop for that motor on 8s.....................i'd be willing to bet you were pulling 250+ amps easily. The ESC probably took the motor out with it.NEED PARALLEL CONNECTORS?? QUALITY 5.5MM, 8MM, 8 AND 10 AWG, GET THEM HERE:http://forums.offshoreelectrics.com/...est!&highlight=
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no did not see any windings dont to bad still copper color connector leads are still solid could x455 prop been to big for motorComment
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I would have started it our with an x448 or so......................NEED PARALLEL CONNECTORS?? QUALITY 5.5MM, 8MM, 8 AND 10 AWG, GET THEM HERE:http://forums.offshoreelectrics.com/...est!&highlight=
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I doubt that a small prop (relatively) would move a 42" hydro very well. I would question if the boat was running wet, how much time was spent off plane, etc. Hydros that size normally need props in the 60mm plus range. Too small and the boat may not even get on plane.
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I've never had a motor take out a esc but have many esc's taken out by a motor failure.white geico w/2200kv 3674 leopard 53.5mph 4s2p, geico w/ 1800kv outrunner 52mph on 4s2p, genesis w/2200kv castle 53.8 on 4s2p, impulse 31 w/2200kv castle, stock p1 and ul-1Comment
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If you need to run a larger prop, 457 or up you probably should go 6s with that motor(or a new one)...................if you get a new motor and want to run 8s get the bigger 5698 in the 835kv and you can swing that prop you have, or go with an x455/3!!
http://www.offshoreelectrics.com/pro...o-5698&cat=148
http://www.offshoreelectrics.com/pro...d=oct-x455%2F3NEED PARALLEL CONNECTORS?? QUALITY 5.5MM, 8MM, 8 AND 10 AWG, GET THEM HERE:http://forums.offshoreelectrics.com/...est!&highlight=
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I've never had a motor take out a esc but have many esc's taken out by a motor failure.
HYDROMAN:
Was the boat running wet?
How long did you run?
How much time was spent off plane (trying to get on plane, slow speed running, etc)?
What batteries were you using - 10S1P? Brand? mAh? "C" rating?
We need more info to help you.
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Zippyflightmax. 14.8 4s1p 5000 mah 45c x 2 in series there was still water in cooling jacket i kept up on plane the whole time running i see i made mistake when i put in prop size it was x455Last edited by hydroman2112; 07-22-2012, 12:55 PM.Comment
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You made several poor choices for components. First off, the x455/3 is a lot of prop for that motor, as already stated. Second, ZippyFlightMax cells are not noted for high-amp performance....and I am pretty sure your setup was pulling a lot of amps. They are better suited for 100 amps and under. Their "C" rating is most certainly over-stated based onwhat I have personally witnessed and what boaters I trust tell me. I suspect that the packs could not supply what the motor was drawing, and this could have damaged the controller by itself. But since the motor seems damaged too, excess motor heat is the probable reason for the failure - caused by too high an amp draw. A shorted motor can take out an ESC very quickly. Third, the motor has a pretty high Kv even for a hydro, it is too easy to make a small increase in prop size and go from an okay setup to 'way too much amp draw. Happens all the time.
Solutions:
Choose a motor with a Kv between 750 and 850. That motor will have more torque and spin the larger, more efficient props required for the large hydro.
Choose an ESC which will handle at least 10S and 200 amps. This will give you adequate headroom for your setup.
Choose 2-bladed props to start with. They will have less amp draw but still enough of a thrust cone to move the big boat well.
There are other routes to take, but the above is what I'd do. If you choose quality parts it will be a fast and reliable boat, assuming you can set it up to run freely on the water and keep the throttle pinned most of the time. Lots of part throttle operation can really heat up an ESC. Good luck!
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