Graham Cramp Posted May 13, 2018 Share Posted May 13, 2018 Evening all, Some advice please. I have a top flute p47 that I’ve been building on and off for ever. I’m just getting back into it and I’ve previously snapped off the wing rib alignment tabs, it I’ve not sheeted the top of the wing yet. I’m assuming I’m going to have a job getting the correct wing washout now... any thoughts or suggestions welcomed. Thanks in advance Quote Link to comment Share on other sites More sharing options...
Former Member Posted May 13, 2018 Share Posted May 13, 2018 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Craig Carr Posted May 13, 2018 Share Posted May 13, 2018 Hello Graham, Can you not work out the height of the tabs from the plan (using verniers) then pack out the ribs from some scrap lite ply wedges so the ribs sit correctly again?. Perhaps tack/spot glue the ply on? Craig Quote Link to comment Share on other sites More sharing options...
Craig Carr Posted May 13, 2018 Share Posted May 13, 2018 Sorry Percy.... cross post Quote Link to comment Share on other sites More sharing options...
Piers Bowlan Posted May 13, 2018 Share Posted May 13, 2018 When you assemble the ribs onto the lower spar make sure their leading edge is in contact with your building board. Then pack up the trailing edge of the wing ribs with scraps of balsa and ply to achieve the correct washout or twist in the wing. Hopefully the plan or instructions which came with the kit will have details of how much washout is required. Just to be clear, the packing will be greatest at the tip and zero at the wing root as the root rib will be flat against the building board (zero incidence). This will not be quite so easy if the wing section is symmetrical or semi-symmetrical. I am not familiar with the Top Flite kit but this is one way of achieving washout. Perhaps someone else who has built this kit can help. If the wing is already built but not sheeted yet, it will be quite flexible so it will be easy to twist the wing to the required washout prior to sheeting. If you have already sheeted the underside of the wing it will be more difficult to twist the wing and pin it to the board, but not impossible. Another cross post, - you beat me to it! Edited By Piers Bowlan on 13/05/2018 08:00:49 Quote Link to comment Share on other sites More sharing options...
Graham Cramp Posted May 13, 2018 Author Share Posted May 13, 2018 That’s great, thanks for the replies. Maybe I was over thinking it... can I assume the washout would result in a straight line from tip to root? Quote Link to comment Share on other sites More sharing options...
Cuban8 Posted May 13, 2018 Share Posted May 13, 2018 Worth investing in or making your own incidence meter. Better to find out that you've a problem shown up by measurement in the workshop rather than a with model with a 'mind of its own' on its maiden. Quote Link to comment Share on other sites More sharing options...
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