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G-ODTW
Joined: 28 Dec 2012
Posts: 22
Location: Meopham, Kent, UK
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 Posted: Wed Feb 19, 2014 6:08 am Post subject: Hi Top??? Beware! Get the wing incidence right! |
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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
To: Dave Walters
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
To: Bud Yerly
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
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_________________
David Walters
01474 816817
dave@robotas.com |
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jglazener
Joined: 14 Apr 2010
Posts: 76
Location: Schoonhoven, Netherlands
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| Posted: Sun Feb 23, 2014 7:40 am Post subject: Re: Hi Top??? Beware! Get the wing incidence right! |
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Bit difficult to follow because it is a string of emails. From Ian Rickard I got the information that for for wing incidence purposes the back of the cockpit module should be used as reference.
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Jeroen
http://www.europaowners.org/main.php?g2_itemId=44165 |
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