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1. 11:49 AM - Re: Re: Altitude/speed control on approach (David Kulp)
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| Subject: | Re: Altitude/speed control on approach |
Hi Ducati (so what's wrong with a Beemer?),
I was aware that what you wrote was the way an ac tended to act, but I
wasn't aware that the relationship was so precise. Whenever we flew out
of Queen City we had a 1,900' ceiling, still flying in LVI's airspace.
When we got far enough south on the way to the practice area and were
beyond LVI's space he'd have me increase power, bring the yoke back in
order to maintain a lower/climbing airspeed, but never taught me that
the speed would remain the same as what I'd trimmed the AC for as we
climbed if I didn't change the plane's attitude. In the pattern he'd
have me change the flaps 3 times, which is probably normal, but each
increase effects your pitch and speed, of course.
In my FF I kind of "trim" my arm on the stick if I go from 4800 RPMs and
60 mph to 5300 RPMs and 70 mph, otherwise I find myself climbing quite
rapidly, which a FF is good at. Interesting to learn all these
relationships so you don't have to think about what's going on, but it
becomes a part of you.
Thanks for the responses.
Dave Kulp
Bethlehem, PA
FireFly 11DMK
On 2/13/2012 6:51 AM, Ducati SS wrote:
> --> Kolb-List message posted by: "Ducati SS"<hiwingflyer6219@yahoo.com>
>
> The technique described is not really reversing anything, the airplane does not
know if it is at 500 or 5000 ft. If you are flying along in a Cessna trimmed
for hands off at 2000 rpm and 90mph and increase rpm to 2400 you will not go
any faster, you will climb at 90mph. If you pull the power to idle ( again without
touching the yoke ) you will descend at 90mph.With the same 2,000 rpm 90mph
trim you can pull back on the yoke and climb but you will lose airspeed. The
problem with using pitch to control alt. on final is the constant change in
airspeed, not so good when you are all ready close to stall speed. Trimming for
approach speed and using power to control decent keeps the airspeed stable.
Of course bumpy air or changes in lift/drag ( such as lowering flaps) may very
well require pitch changes. Hard to prove in a Firefly with no pitch trim and
the resulting unintentional pitch changes.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=366182#366182
>
>
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