xyz70 Posted February 9, 2023 Share Posted February 9, 2023 (edited) I had a desire to build a De Havilland Beaver so I looked at my favourite site Outerzone and found a couple of plans I liked but none big enough. I wanted a span of 2.4 metres. So, I decided to scale a 1.8 m to a 2.4metres or 130 percent. I printed the plan I liked on A4 paper and started from there. DH_Beaver_72in_oz11629.pdf Edited February 9, 2023 by xyz70 File too big 1 Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted February 9, 2023 Share Posted February 9, 2023 Good project as a tow plane, I built one 25 years ago, 2.20m span. Quote Link to comment Share on other sites More sharing options...
xyz70 Posted February 9, 2023 Author Share Posted February 9, 2023 Thanks, I have a bit more to add as soon as i work if out. Quote Link to comment Share on other sites More sharing options...
xyz70 Posted February 9, 2023 Author Share Posted February 9, 2023 (edited) I was reading the forums and I noticed a guy (Geoff Peacock) had a build log a few years back and it gave me some inspiration to do my own. Hopefully mine will not take 5 years! This guy did a good job and gave me a few clues, as he says, there are few instructions. Thats OK I can work it out as we go. Anyway I drew up a quick plan on some butchers paper and set to work. A bit rough but good enough. I started yesterday and have put 5 or 6 hours in so far. Edited February 9, 2023 by xyz70 Spelling fixes Quote Link to comment Share on other sites More sharing options...
xyz70 Posted February 9, 2023 Author Share Posted February 9, 2023 (edited) The hardest thing to do was to cut and crack the longeron to get the direction change under the wing trailing edge. Not difficult but no one likes cutting up longerons. Edited February 9, 2023 by xyz70 Spelling fix Quote Link to comment Share on other sites More sharing options...
Ace Posted February 9, 2023 Share Posted February 9, 2023 Very nice jointing skills 👍 Quote Link to comment Share on other sites More sharing options...
xyz70 Posted February 9, 2023 Author Share Posted February 9, 2023 Thanks. Most of it wont be seen once the sheeting covers it. It will have Warren girder bracing for torsional rigidity, but that will be hidden too. I am planning on using a Saito 150 GK. But it looks nice anyway. Quote Link to comment Share on other sites More sharing options...
kc Posted February 9, 2023 Share Posted February 9, 2023 Welcome to the forum. This looks an interesting project. Construction of the original CAP version seems to have the 1/16 ply doublers outside the fuselage and not inside as usual. Seems to be to line up with the 1/16 balsa covering. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted February 9, 2023 Share Posted February 9, 2023 That should be more than enough my 2.2m one ended up towing 3.75m fibre glass gliders with an OS 120 a compressor. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted February 9, 2023 Share Posted February 9, 2023 Very neat work X, welcome to the forum. 🙂 Quote Link to comment Share on other sites More sharing options...
stu knowles Posted February 9, 2023 Share Posted February 9, 2023 I once had a few flights helping a guy sort out a CAP Beaver. In the end it was OK, if heavy. The landing gear seemed too far forward which led to a lot of weight on the tailwheel, squirrelly take off runs and bouncy landings. It would have been a rave to move it once built in. It would be worth comparing side views with the full size just to see if it has been moved forward for some reason Quote Link to comment Share on other sites More sharing options...
xyz70 Posted February 9, 2023 Author Share Posted February 9, 2023 Thanks everyone for your messages. Yes the sheeting is on the outside, ply to the wing TE and balsa after that. I think the Saito 150 will be heaps, but I may need the weight for C of G. When i get further on i will keep the landing gear in mind. Thanks Quote Link to comment Share on other sites More sharing options...
Bryan Lea Posted February 10, 2023 Share Posted February 10, 2023 My free flight Beaver had scale position undercarriage and made 3 successive dead straight take offs at the BMFA Nats 2013. It came in 2nd place. 1 Quote Link to comment Share on other sites More sharing options...
xyz70 Posted February 11, 2023 Author Share Posted February 11, 2023 Wow! Very nice. I do not think that I am aiming for that high standard, just sport scale. How big is it. Quote Link to comment Share on other sites More sharing options...
xyz70 Posted February 11, 2023 Author Share Posted February 11, 2023 Bryan Lea, I liked the 3view of the fuselage side at the bottom of your message. Are you able to post the other views? Thanks Quote Link to comment Share on other sites More sharing options...
Bryan Lea Posted February 11, 2023 Share Posted February 11, 2023 It is 1/12th scale so 48 inch and scratch built from a 3 view. The Beaver has stressed skin construction so my model has foam wings rather than ribs poking up from fabric covering. The cowl is my own fibreglass moulding. Quote Link to comment Share on other sites More sharing options...
xyz70 Posted February 12, 2023 Author Share Posted February 12, 2023 Some more work on the DH Beaver. I am informally counting the hours work just for interest sake. So far 13 hours with quite a bit to go! Probably not bad as i cut all my own strip wood on the bandsaw as i go. The engine bulkhead cut just waiting for epoxy glue. The tail cone is on. I have left it over size as the fuselage sheeting is to be fitted. I will use 2.5 mm on the sides but 3mm on the top and bottom. The longerons are 10mmx10mm and i am hoping to get nice rounded corners this way. Quote Link to comment Share on other sites More sharing options...
xyz70 Posted February 12, 2023 Author Share Posted February 12, 2023 A couple of more hours- a couple of more photos. Formers 1 and 2 now fitted, it sort of looks like a Beaver now. The Saito is looking smart too. I have the option of using a 125 instead, but it depends on what is needed for the CG. Quote Link to comment Share on other sites More sharing options...
stu knowles Posted February 12, 2023 Share Posted February 12, 2023 At the risk of upsetting you, I'd say that that was quite beefy construction. Personally, if sheeting the fus, 1/16 sheet would be more than enough. Your build - Your rules but I'm just passing on the thought 1 Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted February 12, 2023 Share Posted February 12, 2023 This is going to be a sturdy build, but looking at my notes kept over the years, I have ballpark power numbers you can consider. Where models flew well with power in reserve, so not marginal, I have flying weights Saito 150 at 18.5 lb Saito 125 at 15.5 lb Quote Link to comment Share on other sites More sharing options...
Solly Posted February 12, 2023 Share Posted February 12, 2023 I too scaled up this plan some years ago to 90 inch span. It flew fine with a Laser 100 for power. I sold the model but now wish I'd kept as it flew nicely. If you do the strip stiffeners on the ailerons and flaps note that they are just on the lower surfaces on these bits! 1 Quote Link to comment Share on other sites More sharing options...
Bryan Lea Posted February 12, 2023 Share Posted February 12, 2023 If you do the stiffeners have a look for Plastruct. It is mainly used by plastic modellers and comes in various sizes. This is what I used on my model. Quote Link to comment Share on other sites More sharing options...
kc Posted February 12, 2023 Share Posted February 12, 2023 Bryan, that is a really good effect - could you say what Plaststruct you used? Was it the corrugated siding? Quote Link to comment Share on other sites More sharing options...
Bryan Lea Posted February 12, 2023 Share Posted February 12, 2023 The Plastruct is the solid triangular rod available in sizes from 0.75-3.2mm carefully applied at the correct spacing. It was stuck to Proskin, a glass fibre sheet sold by Mick Reeves. Quote Link to comment Share on other sites More sharing options...
xyz70 Posted February 12, 2023 Author Share Posted February 12, 2023 Both these models look incredible and I am in awe of people who can do this work. However it was never my attention to attempt these levels of scale looks. I am afraid you will have to suffer my inadequacies as I intend to progress toward a nice flying model that most people will recognise as a Beaver. Paul N 1 Quote Link to comment Share on other sites More sharing options...
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