ron evans Posted February 29, 2016 Share Posted February 29, 2016 Watching with interest Colin, mixing new and old materials adds a bit of will it or won't it to the build....I love it. I've used wb poly to seal depron, works ok then with aggressive paints and glues. Ron Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted February 29, 2016 Author Share Posted February 29, 2016 Hi Ron. That seems to be it, as long as you seal the surface you can treat it the same way as wood, gives a lot more scope. Been doing a bit more this afternoon, underside and one half of wing topside now covered, it's coming along. Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 1, 2016 Author Share Posted March 1, 2016 Working this week, so less shed time. Managed to cover top of wings tonight, here with silk wet to pre-shrink it. I need to set this up on the board next, jigged to hold in the three degrees of wash-out while I apply dope to complete the shrinking and sealing process. Hopefully tomorrow night I can get one half done. Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 4, 2016 Author Share Posted March 4, 2016 I've had some time at home today, so a bit more done. Four coats of thinned dope on the top of the wing and the silk has tightened up nicely. The wing feels very rigid and resilient, I don't expect any structural failures there. I won't do anymore with it now until I've completed the fuselage and get to the finishing stages. There's a fair bit of sorting out to do at the front end to fit the engine, tank etc. The OS62FV is about 6mm narrower than the Merco on which the pre-cut formers are based. It isn't enough difference to fit in a ply plate onto the bearers and I don't want to mess about, so I've simply re-cut the formers to the new spacing. It forces the fuel tank slightly lower, but the four stroke carburettor is lower anyway, so it looks fine. I will do some beefing up around the engine bearers, not happy with it yet. The silencer with the new engine is quite compact, but it will still stick out if I use it, so I'm going to have a go at making an in-cowl silencer similar to the one on the plan and get some bits and pieces to connect it up, it looks to have a decent volume, so I should be able to keep the noise down. Also a large volume silencer blends the exhaust note better and makes it sound more realistic. Quote Link to comment Share on other sites More sharing options...
Andy Muckley Posted March 4, 2016 Share Posted March 4, 2016 Hi Colin good to see it's all working out nicely Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 4, 2016 Author Share Posted March 4, 2016 Thanks Andy. Staying focused, got to finish this one! Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 5, 2016 Author Share Posted March 5, 2016 This doesn't look like much but I've spent the afternoon reinforcing around the engine bearers, sorting out the tank fitting and setting up the throttle servo. I'll fuel proof inside here, then fix the tank and I can get on with finishing off the fuselage. Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 11, 2016 Author Share Posted March 11, 2016 Because of work commitments this week I haven't been able to do any building. However I will be in the shed tonight. Here are the essential morale booster shots to get me fired up! Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted March 11, 2016 Share Posted March 11, 2016 Waahaay doesn't that look great Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 11, 2016 Author Share Posted March 11, 2016 As I've said before Danny, don't look too closely! However, the hardest parts are done now. (I confess that I'm not considering rivets in that assumption though)! Quote Link to comment Share on other sites More sharing options...
ron evans Posted March 11, 2016 Share Posted March 11, 2016 Looking good Colin, as it sits it reminds me of the stripped down Chipmunk flown in the Great Waldo Pepper film. Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 11, 2016 Author Share Posted March 11, 2016 I'd never thought of that Ron, it does look like that, doesn't it? Perhaps I should finish it as the Waldo Pepper plane, it would certainly save some time. Quote Link to comment Share on other sites More sharing options...
ron evans Posted March 11, 2016 Share Posted March 11, 2016 Yep..a couple of spoke wheels, flying wires and an all over white finish. Job done Quote Link to comment Share on other sites More sharing options...
Andy Shailer Posted March 11, 2016 Share Posted March 11, 2016 Looking great now Colin, looking forward to seeing all done and covered, like you said you seem to be over the hard bits now. Andy Quote Link to comment Share on other sites More sharing options...
Andy Muckley Posted March 11, 2016 Share Posted March 11, 2016 Yes Colin well done Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 11, 2016 Author Share Posted March 11, 2016 Thank you chaps, but there's nothing very clever about it. I've fuel-proofed inside the front end with Aerokote and fixed the tank in position. I've filled in the section in front of the wing with blue foam instead of balsa. Before gluing it in place I brushed some Aerokote onto the inside of the foam as well. After I've sanded it smooth I'll move onto the wing root fairings tomorrow. Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted March 11, 2016 Share Posted March 11, 2016 Colin That looks very nice. Hard part? Na! Just wait for the maiden! Quote Link to comment Share on other sites More sharing options...
Depron Daz Posted March 11, 2016 Share Posted March 11, 2016 Wowsers, looking good Colin, a lot of work there, well done! Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 12, 2016 Author Share Posted March 12, 2016 Thanks again chaps, I must say that Simon has a point though. It could be my nemesis. Perhaps I should take something for it. Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 12, 2016 Author Share Posted March 12, 2016 Is it just me, or has anyone else concluded that Dennis Bryant completely misinterpreted the shape of the wing root fairing behind the trailing edge? Because of the double curvature it looks different depending on the angle that you view it from, but in plan view he's got the curve the wrong way round. Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 12, 2016 Author Share Posted March 12, 2016 Here it is with the first stage of fitting the wing root fairings. Instead of blue foam, I've gone back to my favourite for this purpose, 1/64" ply, with some filler at the front end. However, as I've just reported on the "chip-shop" thread, the plan detail on the trailing edge of the fairing is completely the wrong shape, G5 is fit only for the bin. I'm trying to work it out now. Quote Link to comment Share on other sites More sharing options...
Fatscoleymo Posted March 12, 2016 Share Posted March 12, 2016 Hi Colin, A bit of discussion on fairing shape last January (2015) ..... I think at the end of the day general agreement was that it should be concave...not convex...many photo's tend to lead to that...the 3 view drawing 3063 which a few of us were working to shows it concave, but that doeas not seem to be correct. Seems wierd 'cos almost all root fairings curve into the wing concave..but the Chippy.... Fats Edited By Fatscoleymo on 12/03/2016 18:17:13 Quote Link to comment Share on other sites More sharing options...
Fatscoleymo Posted March 12, 2016 Share Posted March 12, 2016 Colin - just remembered that on Danny's thread he posted a photo he had taken with a straight edge against the fairing of 'his' aircraft and it did show a convex curve.... Fats Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted March 12, 2016 Author Share Posted March 12, 2016 Hi Fats. Every drawing I've seen shows it as concave. Also photos of the plane in flight plan view show that it is. I've had good look in the SBGB book and it's definitely concave. The strong vertical curvature makes it look different from some angles. I'm working out how to alter it and get it right. Quote Link to comment Share on other sites More sharing options...
Nev Posted March 12, 2016 Share Posted March 12, 2016 Hi Colin, your cracking on. For the fairings, I made mine almost straight, only very slightly convex when looking straight down from the top. Depending on the angle you look at them, they can apear concave or convex. Other have done it differently but I'm happy with mine. Looking good. Nev. Edited By Nev on 12/03/2016 18:39:16 Quote Link to comment Share on other sites More sharing options...
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