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T-REX 550 › T-Rex 550 headspeed/power loss
03-09-2017 12:47 PM  6 months agoPost 1
shess65

rrNovice

Morristown, TN

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I have a 550e which I have flown without issues for the past 3 years. This weekend at the field, I lifted off and when I went from hover (linear curve) to idle up (90% flat throttle curve) the tail came around and it started to fall. I hit throttle hold and auto'd without damage. Others agreed that it sounded like the headspeed was way too low coming out of hover, so I bumped up the throttle curve and took out a little pitch in the middle. I flew and it was good going into idle 1 and idle 2. However it seemed to drop headspeed on anything that took much pitch. Once it dropped, it did not recover back to the original headspeed when I went back to hover.

I landed, put in a new battery, took off and done two flips and again the headspeed dropped and even in hover did not recover. It is as if I am loosing a little headspeed every time I pull any pitch and it don't return even on a new battery and flight.

- I have tried 3 batteries, 2 of which were new and only used for their 3rd flight
- I have went over the entire heli and nothing is binding and bearings are confirmed good
- Have checked one-way bearing and it is not binding or slipping
- I would have expected if speed control that it would be all or nothing but not sure

Looking for ideals or suggestions. Motor going bad? Speed control?

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03-09-2017 01:14 PM  6 months agoPost 2
CoachE

rrApprentice

Cincinnati, ohio -usa

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i would start with a data down load from your ESC. then you will have hard data to look at.

Team JR / Get !T - Got !T - Perfect !T

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03-10-2017 01:26 PM  6 months agoPost 3
FNFAL

rrNovice

Dayton OH

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Yah, I agree, check ESC first then the motor. You got 3 years out of it - not a total loss. Always can get great used stuff cheaper on the classified too.

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03-19-2017 02:20 PM  6 months agoPost 4
shess65

rrNovice

Morristown, TN

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Sorry guys. For some reason I never received any notifications from the forum that someone had responded so I didn't know you had replied. Thanks for the suggestions. Problem is, it has the Talon 90 that came in in and I don't think it can do logging. I'm not sure of any way to do it.

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