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Flaps for glide control

 
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dpaule(at)frii.com
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PostPosted: Tue Aug 01, 2006 5:57 am    Post subject: Flaps for glide control Reply with quote

I sometimes change the flap setting on my Cessna Skywagon for glide-path
control.

It works best during the approach segments when the speed is higher. You
definitely need to be on the fast side of the power curve - but not all that
fast.... On final, when I'm slowing down and bleeding off speed, there's
insufficient kinetic energy left for this to be a good control method. While
flying slower, slips work better.

Incidentally, I generally plan to be a little high to land long, not too
high or long, hopefully. Then adjust the terminal approach with slips so as
to get lower. That way I've got a little more energy to play with, and if I
screw up I won't plant it on the wrong side of the fence.

Doing it this way, I can use full flaps as the nominal position, and vary
the glide path rather considerably.

Won't work in all Cessnas, some won't permit slips with full flaps.

Dave Paule
Kolb Firestar II for sale, $8,500, 503, strobes, intake/exhaust silencer.
Cessna Skywagon, "Big Hammer," absolutely not for sale.

Richard Neilsen wrote -

Sorry if I get long winded but... I just got my biannual check ride. This is
my once every two years ride in a C172. Afterwards I shared my forced
landing experience in MKIIIc with him. I started to tell him how I used the
flaps to adjust my glide path to get me where I wanted to land (kind of like
a negative throttle) and fully retracted them for landing. He stopped me and
said you never never raise your flaps on approach. We then got into a heavy
discussion about flap usage. He finally conceded that it might work in one
of "those" Kolbs but not in a GA aircraft. I obviously need to take him up
in my Kolb and should have done it right then in the C172 but at close to
$100 per hour it wasn't worth it.


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jsflan(at)valornet.com
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PostPosted: Tue Aug 01, 2006 7:42 am    Post subject: Flaps for glide control Reply with quote

And with the 180s and 185s, good idea to watch airspeed with those big full
flaps on that last quarter mile. Been there, actually below sea level,
encountered wake turbulence and totalled one. Interesting perspective
looking at the gas dripping the wrong way "up" the windscreen a few feet
from your head. Also used quick yank to get full flaps to get wings above
high cattle guard posts on an engine out landing in an early 150 that was
already sold. Nice greaser on the other side of the posts.

And on shortfield landings, good idea to dump flaps immediately after
touching to get best braking effect.

Do not archive.

jsf
---


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