[jhb] Re: Autothrottle
- From: Gerry Winskill <gwinsk@xxxxxxx>
- To: jhb@xxxxxxxxxxxxx
- Date: Wed, 30 May 2007 08:58:46 +0100
Next question.
What would be a realistic power setting for design max cruise speed at
FL350?
Gerry Winskill
Gerry Winskill wrote:
In many of my modified panels I have a gauge to display the percentage
thrust lever setting.
On quite a few aircraft I've noticed that they are reluctant to climb,
on A/P, at dialled in rate of climb ans speed. The thrust gauge shows
that this is due to the A/P's niggardly use of Thrust.
At the moment I've just taken off in a Citation. It's climbing at 1800
fpm and not quite making the dialled in 240 kias. When I increase set
speed to 270 kias, it uses no more than 50 % and it doesn't make
better than 263 kias. If I then increase ROC to 2200, the thrust still
doesn't exceed 53%. If I make a bigger speed increase, to 340 kias, it
initially increases to 80% before dropping back to 53%, at which
setting it doesn't exceed 340 kias.
If I use manual throttle, I can get much better acceleration but have
to be careful not to pass my target speed by a large margin.
Any ideas folks?
Gerry Winskill
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