Re: Autothrottle How-To

Never got a response to this...

Anyone willing to throw me some info on how they do it?

I am happy to tidy up rough notes, info etc and repost it as a guide for
others...


"Stuart Whelan" wrote in message
news:373772.74860@wb.onvix.com...
> Hi Folks,
>
> I wonder if anyone would be willing to take the time to detail how they
> have
>
> gone about getting their autothrottles functioning with Boeing type PM
> software?
>
> I am interested in what offsets your read from and write to, and how you
> find it is behaving.
>
> I am VERY interested in whether you can override your autothrottle
> operation
>
> by grabbing the throttle and moving it manually.
>
> In our setup our throttles are connected to optical encoders and in
> parallel
>
> are connected to worm drives through slipping clutches.
>
> Our 'Thust Management Computer' software reads the encoder pulses and
> keeps
>
> track of the absolute position of each lever. It writes the current
> position
>
> to FS using offset 0x88C and 0x924.
>
> Our 'Autothrottle' software reads the desired position of the throttle,
> and
>
> if the desired position of the throttle does not match the position being
> published by the Thrust Management Computer, the authrottle set the
> direction and speed of the worm drive and then engages it. We read our
> desired position from a new offset that Enrico kindly added for us,
> 0x553A.
>
> Our software also writes to and uses bit 8 of 0x5528 to detach the A/T
> from
>
> FS.
>
> How do other people do it?
>