RE: Europa-List: Lifted aircraft nose.

[Bud Yerly <budyerly@msn.com>]

Ah the longer prop is better modification.


If you retain the Woodcomp at 68 inches you will cut off the back of wheel 
pant if you pull it backwards and run the prop/engine on the ground.

By adding a 50mm to the spindle and a spacer, he may have changed the geome
try of the antifriction plate to the horizon.  This angles the spindle back
 and changes the castor angle and the shimmy dampener is slightly affected.


You will just have to flare completely to prevent banging down on the nosew
heel first.  With full flaps and attempting to stick the plane on to the ru
nway above a normal landing speed of 45-50 KIAS you will most likely hit th
e nose wheel first and porpoise.  Not good for any aircraft.


>From an inspection standpoint I would say pay attention to the shimmy dampe
ner plastic plate for uneven wear, and your bolts going through the gear le
g for looseness and elongation.  IF the bolts loosen, remove them, and chec
k the holes have not become elongated or the bolts necked down from wear.


Increasing the ground clearance by jacking the nose up is normally not done
.  Today=92s composite propeller manufacturers gain very little in increasi
ng the blade length beyond 67 inches on a Rotax except for STOL operations.
  The loss in cruise speed between a 68 to 70 inch Whirlwind and a 64 inch 
Whirlwind is about one knot at cruise and takeoff distance is not affected 
in the constant speed prop as the added pitch accelerates about equally.  I
n STOL aircraft, a longer blade means a bit shorter takeoff but absolutely 
a very much lower top end.  In a glass airplane, like the Europa or Lancair
 235, cruise speed difference between a 68 and 64 doesn=92t matter.  It is 
the pitch/twist of the blade on a fixed pitch and on a constant speed prop,
 the pitch is in the hub.  See my website for selecting a propeller for you
r Rotax engine.


Just my opinion,


Bud Yerly

-----Original Message-----
From: owner-europa-list-server@matronics.com <owner-europa-list-server@matr
onics.com> On Behalf Of John Kirkgaard
Sent: Saturday, May 29, 2021 1:15 PM
Subject: Europa-List: Lifted aircraft nose.


com<mailto:john.kirkegaard@gmail.com>>


I have found that the previous owner of my Canadian imported Europa XS

have extended the vertical nose wheel spindle 50 mm and installed a 50 mm s
pacer.

That means that the nose is lifted 50 mm up leaving the plane in a more

nose up attitude when it's on the ground, and off course the wings in a hig
her AOA.

It's probable done to give more prop clearance for the 68" Woodcomp 3000/2

propeller.

Have anyone of you had experience with the behavior of the aircraft during

take off and landing with the nose gear lowered this 50 mm.

I can't really see if it matters or not.


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