David Ovenden Posted January 27, 2021 Author Share Posted January 27, 2021 Started on building the nacelles today. Will start planking tomorrow when the formers are properly dry. Not my favourite job planking double curvature shapes! Lite-ply came from "rescued" fruit crates -hence the coloured patterning. Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 2, 2021 Author Share Posted February 2, 2021 Well, I finally made a start on the planking. I put it off for several days by fitting some oleo legs, sorting out the tailwheel and fitting the wing mounting plates and tubes for the wing bolts. But yesterday I made a start and got 1 nacelle planked. Not looking forward to the second one, though at least I now have sorted out which bit is best to start with. Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 3, 2021 Author Share Posted February 3, 2021 More perverse planking prevarication this morning. I fabricated the elevator horn instead. Will try to get on with nacelle number 2 this afternoon! Hopefully it will be finished by the time the forum is up and running again next week. Should be quicker to upload photos then. Edited By David Ovenden on 03/02/2021 10:40:04 Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 4, 2021 Author Share Posted February 4, 2021 Last post before the old site closes. I Have built the "bulge" onto the bottom of the rudder (that continues the fuselage profile as per the full-size). The plan showed a lump of block balsa, but I really don't want more weight right at the back and the full size used stringers anyway. Plus can't waste balsa these days! Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 10, 2021 Author Share Posted February 10, 2021 Well the new-look website is up and running. Since the last post (on the "old" site some progress has been made. The engine nacelles are all planked and the struts connecting the nacelles to the top wing have been fabricated. So I couldn't resist the uncovered shot of the model as the sun was shining! Also got a motor mounted so hoping to get on with the covering next week. Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 11, 2021 Author Share Posted February 11, 2021 Weighed the complete uncovered airframe and all known compenents (motors; props, esc, lipo, radio gear) Currently model is at 4.3kg. Allowing 5sq metres of covering @ 60g sq/m thats another 300g. So hopefully an A.U.W of 4.6kg (10.1 lbs) Target weight was 5kg so things are looking positive. However, there is always weight that creeps in unexpectedly! Each motor is giving just over 600w on a 10x6 3 blade prop. So a total of 1200w plus. That's over the 100w per lb ratio. So I'm hopeful that the model should have enough oomph. We shall see! Quote Link to comment Share on other sites More sharing options...
dan h Posted February 11, 2021 Share Posted February 11, 2021 Awesome build David and blog It looks great Dan Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted February 11, 2021 Share Posted February 11, 2021 Still following David, looking very good, Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 12, 2021 Author Share Posted February 12, 2021 Thanks Dan and Eric for your encouraging comments. Managed to start fabricating the front cowl rings last night. They are laminated from 1/8" balsa. If skinned with glasscloth, will they be strong enough? Mmmm we shall see. Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted February 12, 2021 Share Posted February 12, 2021 Hi David, I made cowls like that for IC engines treated with dope and tissue and they were fine. You should have no problems with yours , clean electric no vibrations. Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 13, 2021 Author Share Posted February 13, 2021 Finished the 2 cowl rings. I'm pretty pleased with how they turned out. Need to be glassclothed next. 1 Quote Link to comment Share on other sites More sharing options...
Dwain Dibley. Posted February 13, 2021 Share Posted February 13, 2021 Wow David, they would look good on the mantle piece ........ Excellent work. D.D. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted February 13, 2021 Share Posted February 13, 2021 Yep, they're a bit nice are those, what a fabulous looking model. Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 16, 2021 Author Share Posted February 16, 2021 Thanks for the kind words Dwain and John. The cowl rings now have their mounted brackets added and this morning I glassed-clothed them. Not a job I like. I always seem to struggle to get the cloth on without bubbles or wrinkles. Anyway. Job is now done. I also started on covering the wings. I'm using HobbyKing film. This is the first time I've used it and I found it really easy to iron on and it shrinks really well. Excellent value for money 2 Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted February 16, 2021 Share Posted February 16, 2021 Agree on the H.K film, strong and easy to use. Quote Link to comment Share on other sites More sharing options...
dan h Posted February 16, 2021 Share Posted February 16, 2021 Hi David. Those are looking really good. Yep hobbyking film is excellent stuff as you've found out. Your wing looks like the covering went on very well especially the tip! I have just done my first ever fibreglassing job on a model. I didn't need it for strength so I went with deluxe exe kote and found it brilliant to work with. It has not added any weight to my model at all which I am really pleased about and the best bit is their is no smell to it. Dan Quote Link to comment Share on other sites More sharing options...
Martin Fraser Posted February 16, 2021 Share Posted February 16, 2021 On 18/11/2020 at 20:36, David Ovenden said: Not sure if there is much interest in this project. I'm another interested lurker following your build David and I'm a scale helicopter scratch builder working with composites! Your super work may just inspire me to build something in wood the old way. Keep up the great build. Cheers, Martin P.S. Are the props bother running in the same direction or is one R/H and one L/H? Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 16, 2021 Author Share Posted February 16, 2021 HI Martin, Currently I'm going for both props rotating in the same direction as I can't find a suitable 3 bladed left-hand rotation prop in the correct size. I have adjusted the side thrust to (what I hope) is the appropriate extent! I found an interesting photo of the actual aircraft I am modelling. Nice and shiny in the photo which makes using plastic film covering slightly more scale-like! I don't think I will go to the extent of making a scale dinghy with outboard motor.. 1 Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted February 17, 2021 Share Posted February 17, 2021 Not sure how I missed this one David, your modelling is lovely and precise, I look forward to seeing more of this project ? Cheers Danny Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 17, 2021 Author Share Posted February 17, 2021 Thanks for kind comment Danny. The project is moving towards the end phase now as most of the construction work is done. It's not a super-scale project - more an everyday sport scale model. However, its been great fun and I'm (still) enjoying it. 1 Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 17, 2021 Author Share Posted February 17, 2021 Got some paint on the cowl ring today. Still needs another coat though. 2 Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted February 17, 2021 Share Posted February 17, 2021 Nice, wants some fruit in now. ? 1 Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 18, 2021 Author Share Posted February 18, 2021 Bit more progress today. 1 Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted February 18, 2021 Share Posted February 18, 2021 22 hours ago, john stones 1 Moderator said: Nice, wants some fruit in now. ? They bowl-ed me over 2 Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted February 18, 2021 Author Share Posted February 18, 2021 Should I be worried about this model being a bit of a lemon? 2 Quote Link to comment Share on other sites More sharing options...
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