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Pavel Bosak B17

76 inch wingspan

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chris meek 119/05/2017 21:09:52
145 forum posts
112 photos

I've just found these plans that I bought years ago from Rc Model World. I can't figure how the engine firewalls are fixed to the wings, has anyone ever built one or have any ideas? Looking at it as a possible future project. Seems fairly straight forward apart from that, it looks like they're held on just with the strip planking of the nacelles but I'd have thought it would need something more substantial... dsc_1099.jpgdsc_1100.jpg

Robert Parker20/05/2017 11:12:32
697 forum posts
965 photos

Hi Chris,

I have not made one of these, but on looking at your photos it does look as if they have no structure.

My thoughts are, for the outer nacelles, you could make a former from the cross section and notch it around the wing spars that would give it some rigidity and help with alignment.

The inner nacelles will need a bit more due to the loading they are going to undertake. The way around I think would be to create two new wing ribs from light ply to fit between W2 and W3 spaced to suit your u/c units plus mounting plate then make the sides from light ply and glue to the new ribs.

Below is how overcame the same issue with my own design FW 200 Condor and Short Stirling if they are of any help.




dsc00143 (1024x681).jpg

dsc00145 (666x1024).jpg

I have a set of TN's Short Sunderland plans which have such a detail, I'll dig them out and take a look and get back to you.



Robert Parker20/05/2017 11:38:21
697 forum posts
965 photos

Hi Chris,

Here are some photos of TN's Sunderland.




I hope this explains what I tried to say above, but of course the Sunderland does not have a retracts to think about.

This I hope will be my next project.

Hope these are of some help regards


chris meek 120/05/2017 12:47:05
145 forum posts
112 photos

Thanks for the advice Robert, much appreciated. I think with a bit of head scratching I'll work something out similar to what you've done. The nacelles have been the one (four!) thing stopping me from having a go at this design. If I can figure something out it'll go on my list of projects to do!

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