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Old May 17th 18, 09:48 AM posted to rec.aviation.soaring
Jonathon May
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Posts: 82
Default Landing with reduced airbrake

At 06:36 17 May 2018, Bruce Hoult wrote:
On Thursday, May 17, 2018 at 1:43:09 PM UTC+12, Richard McLean wrote:
On Wednesday, 16 May 2018 22:21:48 UTC+8, Matt Herron Jr. wrote:
from my perspective, reducing airbrakes at 100' changes your glide

slop=
e and therefor aim point half way through final. So do you give up your
in=
itial aim point at 100', or do you have two aim points? Either option
seem=
s like a bad idea for students.
=20
Airbrake deployment should be a driven variable to maintain a correct

a=
pproach, not the other way around.
=20
Additionally, a shallower approach for the last 100' means you are

way
=
more susceptible to wind shear, as you don't have much "extra" glide to
rec=
over by closing the airbrakes.
=20
To me, it sounds like the tail strike problem is in the flair, not

the
=
use of airbrakes.
=20
Hi Matt, yes you give up the original aim point. This isn't ideal but

bet=
ter than damaging the aircraft? The debrief can cover off the reasons.
Lots=
of bad landings are the result of not accepting that you stuffed up your
o=
riginal aiming point & concentrating on the actual landing.

I'd think if you were so high turning final that you can't get back on to
a=
standard half brake approach by, say, 100m before crossing the fence

then
=
you've well and truly stuffed up the circuit. Especially in something

with
=
airbrakes as powerful as a DG1000 or Grob. You definitely should never be
p=
lanning to carry full brake all the way down the approach ... that leave
no=
thing in reserve for the unexpected.


Trick one
I have not flown the DG1001 neo yet but I have quite a lot of time in the
original DG1000,you need a step to get people in,if that is the angle for
2point landing them the newer versions going to land tail wheel first .

I have done hundreds of trial flights in an early DG500 that everyone said
was "over braked" ,in fact it could be .But as all I wanted was to get the
punters down safe without a hard landing I tend to add 5kns and gently fly
it on, on the main wheel.
The trouble with that is its not the correct method to teach landing to
pupils.

As I said tricky
My advice would be to buy a K21 or Duo xl ,they fly as you would expect.