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Oh, I'm sorry.
After re-reading y'all's posts, I now realize y'all already knew what I was trying to say. Y'all are saying the problem y'all are experiencing is NOT due to the BEC (both of you have a seperate dedicated adequate BEC), that the problem is with the 40A ESC portion, because it can't handle the heat, and goes into thermal shutoff. If so, I hope y'all post negative reviews in the HK product's review section, so others don't have to learn the same thing the difficult way. |
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Last edited by i812; Oct 22, 2010 at 04:16 PM.
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Also did you set your end points? sounds like your programming on the ESC is fubared. Reprogram |
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Last edited by pitchp; Oct 22, 2010 at 04:38 PM.
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here is your problem , the 2 amp bec its no good you need at least 3 minimum. check all your servos and gyro and add up all the amp draw, if your at around half the amp of the bec its too low . i use the sentury or the plush tungy with a 3 amp bec and never had a problem even with the digital servos . |
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i forgot to ask what esc is it , is it the one with the purple heat sink on it ? that one is nortorios to be a bad one and will always shut down . the turngy sentry and plush have a metal heat sink under the heatshrink , they could come loose and short out across the motor lead board . what i did with mine i put rubber silicone across all the contacts on the board and re taped the shrink on .
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Once they switch off current limiting the ESC should run fine with no issues. Quote:
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Any reason not to move to 4s packs? I use a 3s 2200mAh pack currently but my ESC and motor will both take 4s. I can get an 1800mAh 4s pack which weighs the same as my 3s.
I'm using an 11T with a 3550kv motor, I figure this would give me a headspeed of well over 3000. Are there any drawbacks? |
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All overcurrent problems I recall coming across, were problems of the "system" not being able tolerate the heat being produced. Meaning: because of excessive current, there is excessive heat, which in turn causes mechanical stress (some times permanent), which inturn causes electrical problems. IMO: An advertised 40A device should work 100% of the time UP to 40A, guaranteed!! If programmable current limiting is advertised, as a minimum feature it should allow 40A current limiting. Also, unless they specify to "Bring Your Own" Heatsink or Fan, then it should work at 40A in ambient (27*C?) Temperature without airflow. I bought and received the Mystery 40/4A ESC/BEC (the Plush 40/3 A was/still is out of stock), and don't recall it comming with literature. I suppose maybe if it came with literature there would be a possiblilty of fine print stating it is only able to work when attached to a massive heatsink, inside a freezer, with jet air flow blowing across it? I'm a newbie, so I probably should keep my mouth shut, and watch in amazement. |
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Increased HS reduces torque. your climbouts will be weak. You're better off with a motor with high torque and then increase the HS. You'll need a governor to maintain that constant desired HS you want. Calculated HS @ 100% throttle 3314 but your average will be about 2800-2900 HS. Unless you fly flat 100% T/C Barak will know. I'm not sure about that setup |
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Last edited by pitchp; Oct 22, 2010 at 07:37 PM.
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theres a thought , check your connectors . |
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I must admit there is no features that you would find in a CC or a mini jazz, but it does the job for me. And others here aswell. and you can't program this with a card, some features will work, but some wont. If you do try to program this with a card, you're heli will operate in an unpredictable manner. This is what I experienced with it. So I just listen to the beeps... beeps... beeps... |
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Last edited by pitchp; Oct 22, 2010 at 07:47 PM.
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I thread locked the screws in the one I had immediately when I got it. I flew it for a while and then sold it to someone else when I got a Phoenix 35a on a used chopper. As far as I know the person I sold the H40A to is still flying it today.
Edit: While I appreciate the shout out, I'm no expert on 450 choppers at all. I have picked up a thing or two here and there, but I still manage to learn something new every day. |
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Thought I'd throw in my 2 cents. The esc in question recommends using an outrunner motor. That's because it can't exceed so many "kv" of a motor. I think it says 2000kv. The esc can't handle the speed of the motor. It could however handle 40 amps just fine in the right application. That's why it's great for parkflyer planes. I have one in a Mini Ultra Stick with a 1200kv motor and all is well. Happy flying!!
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