APM Controls Throttle in FBW_A

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What steps will reproduce the problem?
1. Set the mode switch to FBW_A at any point.

What is the expected output? What do you see instead?
Expected output: Control surfaces should respond to inertial movement of the 
plane, propeller should be controlled by the user.

What happens instead:
Control surfaces respond accordingly, but throttle spins up at what appears to 
be the value established by the throttle cruise % parameter.  The throttle 
isn't controllable by the user.

What version of the product are you using? On what operating system?
ArduPlane v 2.4.0
APM2 hardware v 2.4.1

Please provide any additional information below.

I have a tlog that demonstrates this available--please email me if you'd like a 
copy.

The wiki states in several places that FBW_A operates throttle manually--so it 
uses input from the user--but it's clear that APM is running that motor.

Here's the most descriptive place in the wiki regarding expected behavior: 
https://code.google.com/p/ardupilot-mega/wiki/FlightModesFlyByWire

Original issue reported on code.google.com by hagfe...@gmail.com on 22 Jul 2012 at 3:03

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what is your thortle min percent?
if i recall it will spin up to throttle min

Original comment by Meee...@gmail.com on 23 Jul 2012 at 7:39

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These are all the values I could find that seemed relevant.  If you like, I can 
send you my param file.

THR_MIN = 0
THR_MAX = 100
TRIM_THROTTLE = 37
ARSPD_FBW_MIN = 7

Original comment by hagfe...@gmail.com on 24 Jul 2012 at 5:10

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The documentation explicitly says that throttle is under manual control in FBW 
A.. Is that not correct?

Original comment by hagfe...@gmail.com on 24 Jul 2012 at 5:10

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what about your rc3_min value? You are correct about the throttle, it should be 
full manual. but will be limited to the rc3_min and rc3_max values

Original comment by Meee...@gmail.com on 25 Jul 2012 at 4:16

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Interesting update--I was able to apparently clear this issue from both FBW_A 
and Stabilize by reloading APM to the board.  The parameters remained intact 
and yet the behavior changed.  I haven't tried this in flight of course...was 
observing the feed from the training live graph in the Mission Planner.

Throttle range is about 980 apart.

Original comment by hagfe...@gmail.com on 25 Jul 2012 at 4:21

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Original comment by Meee...@gmail.com on 17 Aug 2012 at 6:37

• Changed state: Done