I'm soon bonding my top on, and luckily I realised that Europa's standard
instructions
would result in a wing incidence error. I contacted Bud, who was very
helpful:-
From: Bud Yerly
Sent: 19 February 2014 13:24
Subject: Re: Wing angle of incidence for Mod 64b, Hi Top
So far all high top builders have caught it. Why it was omitted from the mod,
I can't say.
Bud
Sent from my Verizon Wireless 4G LTE DROID
Dave Walters wrote:
Thanks Bud, good stuff. If you are building a Hi Top, I take it then that page
27-1, rather than saying placing the spirit level on the door recess of the
port side", should read placing the spirit level parallel to the marks on the
joggle of the lower fuselage on the port side".
I wonder how many Hi tops have this wrong!, ploughing along inefficiently
through
the air? Do you mind if I bung this whole thread on Matronics for others to
benefit, crediting you?
Best Regards,
Dave Walters
Sent from Dave's iPad
On 18 Feb 2014, at 21:59, "Bud Yerly" wrote:
Dave,
Sorry that Europa did not publish my changes for this four years ago.
What you do is put two holes on the water line prior to painting. I put the
marks
on the joggle of the lower fuselage which is parallel to the door sill. If
you don't want to fuss with marks on the outside of your aircraft, then make
a levelsee line on your seat back and plan your interior to pull up, exposing
the leveling marks... Set your level on your seat back marks. Or make a bevel
triangle that sets on the door sill and the wedge is made to hold the level
on the level axis.
Of course if your plane is already painted, pull the the interior back and use
the joggle line molded in to mark from. Again, it may be better to make a
couple
holes. If that is covered up by a under sill conduit, use the line in the
baggage bay as that is level also.
In many certified aircraft there is a line of rivets, or two nutplates for
screws
for a horizontal. On some jets, the vertical axis of the door or canopy bow
is used. On others, the belly has two witness marks and are threaded (nutplates
on the inside) where a straight edge is placed to level.
I prefer to screw in two #6 button head screws into the fuselage below the door
and use that to hold my 24 inch digital level. But am comfortable with the seat
back position also.
Regards,
Bud
----- Original Message -----
From: Dave Walters
Sent: Tuesday, February 18, 2014 4:11 PM
Subject: Wing angle of incidence for Mod 64b, Hi Top
Hi Bud,
I cannot recall seeing anywhere how 64b affects the water line to chord line
angle
(the angle of incidence). Blindly following the placing the spirit level on
the door recess of the port side of page 27-1 surely will now introduce an
error?
I reckon the wing angle to the door recess should be 2.5degrees LESS the angle
introduced by 64b.
What do you think?
Best regards, Dave Walters
--------
David Walters
01474 816817
dave@robotas.com
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