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GREENLEY TUG BUILD THREAD 88"

Be kind to our tug pilots, we cant do without them.
Wayne Thompson
Posts: 40
Joined: 17 Sep 2018, 04:56
Location: New Zealand

Re: GREENLEY TUG BUILD THREAD 88"

Post by Wayne Thompson » 22 Jan 2019, 20:15

awe man so i messed up again..... FALSE LE / LE glued in already !!! DANG IT
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Wayne Thompson
Posts: 40
Joined: 17 Sep 2018, 04:56
Location: New Zealand

Re: GREENLEY TUG BUILD THREAD 88"

Post by Wayne Thompson » 22 Jan 2019, 20:20

looks like i got some serious sanding to do - so here are some pics. as u may recall earlier on the first wing i glues rib 1 upright then about 5 monutes later remembered it had to be tilted a few degrees inwards for the diahedral and ran back into the garage and moved it .....it seems a bit too much.
However i had a few spare R1 MADE SO I CAN GLUE IN PLACE AND STILL SAND WAY BACK AND GET A GOOD CENTRE RESULT
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Wayne Thompson
Posts: 40
Joined: 17 Sep 2018, 04:56
Location: New Zealand

Re: GREENLEY TUG BUILD THREAD 88"

Post by Wayne Thompson » 22 Jan 2019, 20:21

just some more pics
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Wayne Thompson
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Joined: 17 Sep 2018, 04:56
Location: New Zealand

Re: GREENLEY TUG BUILD THREAD 88"

Post by Wayne Thompson » 22 Jan 2019, 20:24

so next move is to sand the centre section and finish off the tips.

ply skin will go over the sanded trailing edge and the ply skin LE will have to butt join the false LE ply. Bit of a duff up but so be it i guess

john greenfield
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Re: GREENLEY TUG BUILD THREAD 88"

Post by john greenfield » 23 Jan 2019, 07:36

Wayne

A bit late now but for future reference, it is normal on a model with a false leading edge to sheet the wing before attaching the thick leading edge. The sheeting is stuck down onto the false leading edge and any overhang trimmed back Only then is the main thick leading edge added and shaped.

AEB
AEB = Aeronautical Energiser Bunny (with thanks to CW)

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Peter Balcombe
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Location: Clevedon, North Somerset, U.K.

Re: GREENLEY TUG BUILD THREAD 88"

Post by Peter Balcombe » 23 Jan 2019, 12:09

Wayne,
I would suggest that rather than just butt the skins up against the false leading edge, you install some strips between each rib on the rear of the leading edge to provide a glueing land - otherwise the front of the skins can easily separate from the false LE.

john greenfield
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Re: GREENLEY TUG BUILD THREAD 88"

Post by john greenfield » 23 Jan 2019, 18:03

Peter Balcombe wrote:
23 Jan 2019, 12:09
Wayne,
I would suggest that rather than just butt the skins up against the false leading edge, you install some strips between each rib on the rear of the leading edge to provide a glueing land - otherwise the front of the skins can easily separate from the false LE.
Wayne
You would be better cutting the leading edge off and redoing it with a 1/8" false leading edge sanded to shape. Attach the 0.8mm wing skins as my post above and after trimming back add the thick leading edge. Trying to put balsa between the ribs and then sand them to profile will be difficult and will probably result in an uneven surface and a poor leading edge.

AEB
AEB = Aeronautical Energiser Bunny (with thanks to CW)

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Stuart Ward
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Location: Pukekohe NZ

Re: GREENLEY TUG BUILD THREAD 88"

Post by Stuart Ward » 27 Jan 2019, 09:06

Hi Wayne I have posted a close up photo of the construction of the Greenley wing leading edge at the root rib.
The only difference between what I have done and what John has described is that I have used a 3mm ply false leading edge not a balsa false leading edge.
The false leading edge was cut to width and planed with the bevel tangent to the ribs, before being but glued to the ribs.
The the 0.8mm ply is then glued using you proffered method (wet glue and masking tape, or iron on method) leaving the front of the ply overhanging a little and sanded back flush after the joint has been made.
Only then do you add the 1/2" balsa leading edge.
Hope this helps
Stu
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Wayne Thompson
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Joined: 17 Sep 2018, 04:56
Location: New Zealand

Re: GREENLEY TUG BUILD THREAD 88"

Post by Wayne Thompson » 28 Jan 2019, 20:15

RIGHTO MATES

off we go - Thanks guys and especially Stu for all the calls and advice.

So 2.5hrs later one ply false LE removed and binned .... started with a square file file to flatten the glue joint nicely then undercut with fine razor saw then cut with sharp knife ( first time i have done this ) so presto done....... that sucked!! The other wing was a simple 60 degree cut into the glue joint with the razor saw - just to get a bite, then press it strait up against the rib and cut into the false LE ( THROWING IT AWAY ANYHOW) then knife slice under the rib and a small sand, all done in 30min - much better.
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Last edited by Wayne Thompson on 28 Jan 2019, 20:19, edited 1 time in total.

Wayne Thompson
Posts: 40
Joined: 17 Sep 2018, 04:56
Location: New Zealand

Re: GREENLEY TUG BUILD THREAD 88"

Post by Wayne Thompson » 28 Jan 2019, 20:17

did the servo bays the way i liked them with some added balsa surface area. Plus some side re-inforcing on the ribs
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