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tonyrenshaw268(at)gmail.c
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 Posted: Thu Jul 17, 2014 2:40 am Post subject: Tailplane twist |
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Gidday,
Whilst trying to sort out a difference in the trailing edges of my stabilators/elevators, port one being higher, when I knew my jigs etc for setting up this sort of thing was meticulous, if not my strength, I should probably have been a jig builder not an aircraft builder, I came up with a possible solution I’d like to air. So, I noticed my tailplanes were not level when my wings were. I have removed my torque tube pin receptacles from the port root closeouts, and I endeavoured to get the stabs level prior to rebounding in the receptacles when I realised I could lift the port tailplane, trying to take up slack in the elongated pin receptacle holes, and I noticed the stud tailplane also moved. It was then I realised the lifting of the port tailplane, from below, was rocking the entire tail, torque tube and all. The lower fuselage hemisphere has a twist in it, or so it seems. I don’t quite know how this has now occurred, as I know I would have put my tailplane torque tube in level, but now its not. Had I left it the way it was, and didn’t do the drive pin repair, it would have had the Port tailplane higher than the left, and combined with single pilot weight asymmetric loading, would have helped to created unwanted roll.
So, I now am thinking I might do a DNA mod, like the visualisation of two ladders held 180 degrees opposed down the sides of a column, and then the column twisted, and removed, leaving twisted ladders. If I do something similar with an inert substrate, perpendicular to the floor, and twisted up from baggage bay to tail, with a 2 ply fence layup, say 1” high on both sides, forgoing a 1-2 kg penalty, would that not be a worthwhile outcome? It might only be on the lower half of the fuse, but I suspect it will hold the tail section true. I also am aware the top hemisphere might act like a continual, banded row of fences, and to that end I need the advice of the list. Should I just jig the lower fuse, the tailplane torque tube, and get the geometry sorted accordingly, and bond the top on to hold it all “without” the twist?
Regards
Tony Renshaw
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grahamsingleton(at)btinte
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| Posted: Thu Jul 17, 2014 4:12 am Post subject: Tailplane twist |
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Tony
have you had the top Clecoed on? It should be possible to correct the twist
in the fuselage and lock it level when you finally bond the top on.
Graham
From: Tony Renshaw <tonyrenshaw268(at)gmail.com>
To: europa-list(at)matronics.com
Sent: Thursday, 17 July 2014, 11:39
Subject: Europa-List: Tailplane twist
--> Europa-List message posted by: Tony Renshaw <tonyrenshaw268(at)gmail.com (tonyrenshaw268(at)gmail.com)>
Gidday,
Whilst trying to sort out a difference in the trailing edges of my stabilators/elevators, port one being higher, when I knew my jigs etc for setting up this sort of thing was meticulous, if not my strength, I should probably have been a jig builder not an aircraft builder, I came up with a possible solution I’d like to air. So, I noticed my tailplanes were not level when my wings were. I have removed my torque tube pin receptacles from the port root closeouts, and I endeavoured to get the stabs level prior to rebounding in the receptacles when I realised I could lift the port tailplane, trying to take up slack in the elongated pin receptacle holes, and I noticed the stud tailplane also moved. It was then I realised the lifting of the port tailplane, from below, was rocking the entire tail, torque tube and all. The lower fuselage hemisphere has a twist in it, or so it seems. I don’t quite know how this has now occurred, as I know I would have put my tailplane torque tube in !
level, but now its not. Had I left it the way it was, and didn’t do the drive pin repair, it would have had the Port tailplane higher than the left, and combined with single pilot weight asymmetric loading, would have helped to created unwanted roll.
So, I now am thinking I might do a DNA mod, like the visualisation of two ladders held 180 degrees opposed down the sides of a column, and then the column twisted, and removed, leaving twisted ladders. If I do something similar with an inert substrate, perpendicular to the floor, and twisted up from baggage bay to tail, with a 2 ply fence layup, say 1” high on both sides, forgoing a 1-2 kg penalty, would that not be a worthwhile outcome? It might only be on the lower half of the fuse, but I suspect it will hold the tail section true. I also am aware the top hemisphere might act like a continual, banded row of fences, and to that end I need the advice of the list. Should I just jig the lower fuse, the tailplane torque tube, and get the geometry sorted accordingly, and bond the top on to hold it all “without” the twist?
Regardshttp://forums.matronics  tronics.com/contribution" target="_blank">http://www.matronics.com/contri================
[quote][b]
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christoph.both(at)acadiau
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| Posted: Thu Jul 17, 2014 4:37 am Post subject: Tailplane twist |
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That is what I did. Bottom had a twist. Corrected when glueing the top on. During building I hung a water pail on one of the tail plane stubs to keep the open canoe straight.
Christoph Both
#223 Wolfville Nova Scotia Canada
Sent from my iPhone
On Jul 17, 2014, at 9:13, "GRAHAM SINGLETON" <grahamsingleton(at)btinternet.com (grahamsingleton(at)btinternet.com)> wrote:
[quote] Tony
have you had the top Clecoed on? It should be possible to correct the twist
in the fuselage and lock it level when you finally bond the top on.
Graham
From: Tony Renshaw <tonyrenshaw268(at)gmail.com (tonyrenshaw268(at)gmail.com)>
To: europa-list(at)matronics.com (europa-list(at)matronics.com)
Sent: Thursday, 17 July 2014, 11:39
Subject: Tailplane twist
--> Europa-List message posted by: Tony Renshaw <tonyrenshaw268(at)gmail.com (tonyrenshaw268(at)gmail.com)>
Gidday,
Whilst trying to sort out a difference in the trailing edges of my stabilators/elevators, port one being higher, when I knew my jigs etc for setting up this sort of thing was meticulous, if not my strength, I should probably have been a jig builder not an aircraft builder, I came up with a possible solution I’d like to air. So, I noticed my tailplanes were not level when my wings were. I have removed my torque tube pin receptacles from the port root closeouts, and I endeavoured to get the stabs level prior to rebounding in the receptacles when I realised I could lift the port tailplane, trying to take up slack in the elongated pin receptacle holes, and I noticed the stud tailplane also moved. It was then I realised the lifting of the port tailplane, from below, was rocking the entire tail, torque tube and all. The lower fuselage hemisphere has a twist in it, or so it seems. I don’t quite know how this has now occurred, as I know I would have put my tailplane torque tube in !
level, but now its not. Had I left it the way it was, and didn’t do the drive pin repair, it would have had the Port tailplane higher than the left, and combined with single pilot weight asymmetric loading, would have helped to created unwanted roll.
So, I now am thinking I might do a DNA mod, like the visualisation of two ladders held 180 degrees opposed down the sides of a column, and then the column twisted, and removed, leaving twisted ladders. If I do something similar with an inert substrate, perpendicular to the floor, and twisted up from baggage bay to tail, with a 2 ply fence layup, say 1” high on both sides, forgoing a 1-2 kg penalty, would that not be a worthwhile outcome? It might only be on the lower half of the fuse, but I suspect it will hold the tail section true. I also am aware the top hemisphere might act like a continual, banded row of fences, and to that end I need the advice of the list. Should I just jig the lower fuse, the tailplane torque tube, and get the geometry sorted accordingly, and bond the top on to hold it all “without” the twist?
Regardshttp://forums.matronics tronics.com/contribution" target="_blank">http://www.matronics.com/contri================
[b]
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