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I finally got and built my cheetah a few weeks back sadly I couldn't post my build I got affected by the hurricanes Irma and Maria. But anyway I shall post my build it is my first. So please tell my what I did wrong and what motor should I get to go faster in the future or what prop I should get. Setup leopard 4092 1730kv 642 detounged cnc prop.
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We need more information....
- voltage?
- ESC?
- current speed?
- desired speed?
- pics of install and transom?
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ESC 180a seaking 6s desired speed 70 + hopefullyComment
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That’s a bunch of motor... at some point, you’re just using more current to do the same job of a smaller motor. I would think a 4082 is ample for the boat. Kv sounds about right. Nice choice on the starting prop. Very prudent to start with a smaller blade. Many get to a 445 or 446 size blade after setup optimization.
I hope you weren’t hurt too badly from the hurricanes. Terrible thing to go thru!Comment
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I thought the motor would be to much but I did it because I reinforced the hull with fiber glass.Comment
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Well I was hoping to change my leopard to a neu some day. I find that my ESC is kinda warm it's the v3 is there any way to increase the cooling? It has holes that could be used but it has 2 capacitors in the way.Comment
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Pushing the Chertah into the 70s is possible but the hull works better in the 60s. Either way, he doesn’t have enough prop for that hull and motor to get there - too small in diameter and an inadequate pitch. BTW, it would be helpful if the OP answered all my questions. We aren’t mind readers.
Actually the motor size is large but okay, a club member used a 4092 (different Kv) in his boat and hit 70 on 4S. For the OP’s boat he’ll need an x648 at the least to hit high 60s. But that ESC won’t like it, that Kv on 6s will pull a lot of amps. It has nothing to do with cooling, the ESC will most likely be over-amped or run too long. “Kinda warm” is meaningless, what is the actual temp, how long was it run and what kind of running - long straights or lots of tight turns?
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Sorry I don't have the specific temperature but the runs were straight and I ran for about 10 minutes. If I run tommorow I will get you the temps.Comment
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I shall I was thinking about buying a 220 sword fish but I heard they kinda give trouble so yeah .Comment
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The new "X" series seem pretty nice, and good prices.Comment
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10 minutes is about 4 times longer than you should be running.Noisy personComment
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Similar but not the same, but for comparison.
Ive run a DF explorer at 70-75mph with your setup with a octura x450/3 blade. But only for a short burst in a straight line, then allow to cool. If i try to run for much longer I have esc heat issues.Steven Vaccaro
Where Racing on a Budget is a Reality!Comment
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Your current speed (question#3) is more important, what is too slow for you? Actually it is a good thing that you ran such a small prop, ten minutes with a high draw setup will burn things up. Going to a SF220 won’t help with that issue.Sorry I don't have the specific temperature but the runs were straight and I ran for about 10 minutes. If I run tommorow I will get you the temps.
Ten minutes of “straight” runs can be very rough on the ESC and motor because each run includes strong acceleration. This is what really draws the amps, once on step and at speed the amp draw drops substantially. We know you are new to this, we are trying to help, not to discourage you. There is plenty to learn, pick you references carefully.
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