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› Does this look like a brown out?
03-08-2010 02:56 PM  8 years agoPost 1
omster

rrNovice

midland, mi

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I'm fairly new to the Spektrum world and have heard of people having brown-outs when loads get high from the servos, etc.

I'm using a stock T-Rex 250 ESC/motor, 3x HXT900s for cyclic, a HK401B gyro w/DS420 digital tail servo, powered by a 800mAh Flightmax 3S - all inside a Fusuno MD500e scale fuselage.

I've heard the HXT900s have a high amp draw, but not sure if it's too much for the built-in BEC on the Align RCE-BL15X...

Anyway, here's the video. Unfortunately I didn't check to see if the Rx was flashing as this was the first time this happened to me - any insight would be greatly appreciated!!!

http://www.youtube.com/watch?v=9eXlix42Dtc

TIA

~Om
It goes without saying...

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03-08-2010 08:42 PM  8 years agoPost 2
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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Not sure but it did seem like the ESC lost power at least to the motor. Any chance you have a loose connector or bad solder joint on the main leads?

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03-09-2010 01:15 AM  8 years agoPost 3
Zaneman007

rrElite Veteran

Texas - USA

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Looks like streets, houses, and lawns, a neighbor hood from that angle.

Brown outs are caused by the battery voltage dropping below some nominal voltage, somewhere around 4 volts or less(someone step in and correct me). From sound of it, I would say that you have a 450 running at a low head speed. That would imply that you are running a 3s lipo, and trying to get extended flight times.

And I would venture to guess that the 11.1 volt lipo never got low enough to cause a brown out. You're battery would be toast if it did.

Most ESC's have a cut off point where they cut the power to the motor when the battery gets to low. It is more likely that your ESC step in to save the battery, and cut power to the motor.

If your battery is reading "zero" per cell, yea you may have had a brown out.

Else, You need to set the timer.

Old Guys Rule!

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03-09-2010 03:00 AM  8 years agoPost 4
fenderstrat

rrProfessor

Aston,Pa

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it sounds to me like the esc went into thermal shutdown,possibly got too hot?especially inside a fuse?or the bec cant supply enough amps to run that system..again with the added weight of a fuse and no air flowing..not a good combo

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