Jeez Justin
Don't try that on my 300 metre strip with no wind and at gross!
Rick Morris
G-RIKS 912S Tri 500 hours.
_____
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Justin
Kennedy
Sent: 30 January 2009 14:43
Subject: Europa-List: Bouncing Mono Classic
Hi All,
Although an avid reader of this forum rarely feel that I have something
that
would contribute to the body of knowledge when you guys are so on top of
what you are doing. However =93bouncing mono classics=94 was something
that I
was good at until it cost me a propeller (no change out of =A31000).
My mono classic has the shock absorbers and the narrow tyre that never
rubs.
It also has the brake calliper rotated to the back.
I run the Type at 18 to 24 psi.
After much deliberation and practice I get a slight skip 50% of the time
and
grease it on about 45% of the time. The other 5% include =93go
arounds=94 and
ones I would call =93untidy=94. This is a huge improvement on my
original tally.
The main thing is that I am now 95% confident on the approach and enjoy
the
fact that it is unlikely to cost me another propeller and if it does I
will
deserve it.
While I agree with everything people have said, the speed over the
threshold
and landing is very, very critical. I talked to many an instructor and I
am
very grateful to the one that came up with the following. The speed on
the
round out should decay through =93the stall speed plus 10% plus half the
wind
speed. I then add 10 kts to give the threshold speed. My stall speed is
42Kts with full flaps, add 10% to give 47kts (that=92s rounded up =BD a
knot)
and say, for example, a ten knot head wind component gives 52kts. Add
ten
knots to that and I should come over the threshold with the speed
decaying
through 62kts. I normally come down the approach at 70kts more if it is
needed. I let the speed decay the over the threshold at the calculated
speed. At this point I remove the remaining throttle slowly so that the
round out is slightly less violent. Sudden removal of all throttle
requires
a pronounced round out which makes the timing of the manoeuvre very
critical. Smooth removal of throttle removes the need to round out so
quickly. Round out too quickly you don=92t get the high rate of sink
required
to sink through the ground effect with unfortunate consequences.
Wow that sounds really complicated but it is how I arrived at an easy
relationship with my aeroplane.
So when the controller gives me the wind speed, I think 47+ the half the
wind speed or it=92s head on component if it is very crosswind. Add 10
kts and
that=92s what I am aiming to be decaying through when I cross the
threshold.
(I add a PUF check here (Pitch ' Undercarriage ' Flap) After that it
is just
practice. I used it in anger landing at Calais one day with a 35kt wind
and
it resulted in an absolute greaser. In actual fact the =93no wind=94
situation
is more difficult and the formula works for that too.
I apologise if all this speed stuff is common knowledge but it wasn=92t
mentioned in any of the posts on the subject.
Happy Landings
Justin
Justin Kennedy
G-ZTED Europa Classic Monowheel 912S with Airmaster Prop
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