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T-REX 600 › Head speed loss
08-10-2007 12:28 PM  10 years agoPost 1
RotoRob

rrApprentice

Clinton MI

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I have two different battery packs that I use in my 600, one being a 4200 align and one thunder power 5000. After just a few minutes of flying my head speed will fall off quite a bit, actually to the point of loosing control of the tail if I do a full climb out.
At somewhere around 4 minutes on the 4200 the LVC on the esc will start cutting out, acting like the voltage has dropped too much. But when I charge the voltage is still strong and it only will take 70% or so. The head speed will also fall off on the TP and when I charge it after 5 minutes of flying I get the same results. Are both these batteries bad or do I have a different problem.

Any ideas

R

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08-10-2007 01:54 PM  10 years agoPost 2
helimatt

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Lafayette, IN

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Well, could of course be bad packs (certainly the Align has not generally gained a good reputation), but I would do another check on connectors - lipo to ESC, and ESC to motor to make sure they are tight, clean, and solder joints are sound. Too much resistence in the connections (they carry a lot of current!) can act like low battery voltage.

Also, just conjecture, but is it very hot outside when you are flying? If the lipo and motor are getting hotter than normal, they may not perform very well. I noticed a definite loss of performance here as the temps went from 80's to 95+degF outside. One of my packs (a FlightPower 20C 4900mAh) gave me low-voltage cut-off during my timed flight, and I normally never fly nearly long enough to reach that point. I haven't recharged the pack yet to see how much it takes back.

Never, ever, ever, ever give up.

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08-10-2007 04:01 PM  10 years agoPost 3
cliffbarrimore

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Welcome Bay,​Tauranga, New​Zealand

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Could be a faulty motor or esc, I'd try swapping out if possible just to pinpoint the issue before and as already suggested check all the connections

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08-10-2007 11:26 PM  10 years agoPost 4
docjoe

rrElite Veteran

Stockton, CA United​States

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What Motor/ESC combo are you using? I used to fly the L motor and noticed that after 3-4 minutes, the power dropped off significantly, especially with the Align batteries. I'd recommend at least the XL motor if you're not running that already. However, the ALign packs really are not great packs. I fly Air Thunder, Thunder Power and Flightpower and the Air Thunders are going to be the packs of the future, lasting probably much longer than the flightpowers.

Joe
We haven't seen Colonel Angus around these parts for years!

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08-11-2007 02:11 AM  10 years agoPost 5
airboss

rrElite Veteran

OC ,california

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give us your radio set up for T/C and P/C. what motor are you using?and what pinion?

Urukay HPS3 KSE 700 HPS3

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08-11-2007 11:45 AM  10 years agoPost 6
RotoRob

rrApprentice

Clinton MI

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Thanks for all the input guys, well to start with I'm running the stock motor with the 10 tooth pinion and stock esc.
Airboss, I'm not really sure what you mean by P/C or T/C. But as far as my radio setup it was recommended that I run in mode 2 at 100% which does not seemed to have helped. Also, I've been checking the temp and have noticed ranges from 150 to 180 on the motor, and about 120 on the battery. Do these temps sound normal?
I have a new flight power 5000 coming and will see how that changes anything if at all.

thanks again,

Rob

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T-REX 600 › Head speed loss
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