Andy Green Posted January 2, 2014 Share Posted January 2, 2014 This is my build of the Barnstormer 72, I'll have more pics and details on my website. I bought the plan, rib pack, pre formed cabanes and the sticky back templates. Making a start on the ply formers. These were all made from 1/4 as it was all I had. This is the joy of building from plans, treat them more as a guide and use what you have available (within reason). I only have 2 size of hole saw, and the biggest was still too small to suit the plan, but building from scratch mean you have to made changes along the way, I cut 2 holes of the diameter I had and joined them to form an elongated hole. Andy Quote Link to comment Share on other sites More sharing options...
Andy Green Posted January 2, 2014 Author Share Posted January 2, 2014 As I did with my Super 60, I'm going to have a servo under the tailplane to drive the elevator, so planning ahead now I made the rear solid, with the side with the servo having a ply doubler. Building the fuselage sides, is a case of pinning over the plan, there are a few ways to make the 2 sides the same, my prefered way that works well is to build the second side over the first one (with a plastic separator so you don't glue them together). As the front part is all right angles there was no need to get the jig out, just pay attention to making sure all is square when gluing. Andy Quote Link to comment Share on other sites More sharing options...
Tony Bennett Posted January 2, 2014 Share Posted January 2, 2014 looking great so far sir. i used all the scrap bits i had lying round for my build. surprising what you can build out of the scrap balsa bin. Quote Link to comment Share on other sites More sharing options...
Nigel Day Posted January 2, 2014 Share Posted January 2, 2014 I've put the kettle on, sent for some digestives and will watch with interest Andy. Quote Link to comment Share on other sites More sharing options...
Nev Haycox Posted January 2, 2014 Share Posted January 2, 2014 Hi Andy and Happy New Year, As I only put together ARTF planes, I shall be watching with interest the art of balsa bashing . Nev. Quote Link to comment Share on other sites More sharing options...
Andy Green Posted January 2, 2014 Author Share Posted January 2, 2014 They've gotta be choc digestives Nigel. And to you Nev. Look forward to meeting up at a show at some point, hopefully before Green Acres. Suffering with a bit of man flu at the moment, and a bit cold in the workshop. Andy Quote Link to comment Share on other sites More sharing options...
Andy Green Posted January 2, 2014 Author Share Posted January 2, 2014 Rear section pulled together, don't try and get the fuselage sides joined in one step without a jig, rather do a bit, get it right and move on. I have fitted the rear cabane mount, but I won't fix the front one until the wings are ready, I can then adjust it's position to get the wing incidence right. There is no incidence shown on the plan (I guess the model dates from a time when thing like that weren't important). I shall fit the front cabane mount to give +0.3 degrees. Fin built over the plan, only took 5 mins and its another job done. I have added 1/4 square anti warp piece to the rudder LE. Andy Edited By Andy Green on 02/01/2014 17:33:12 Quote Link to comment Share on other sites More sharing options...
Tony Bennett Posted January 2, 2014 Share Posted January 2, 2014 lovely so far sir. i did the same with mine on the front cabane mount, left it off till the wing was ready. makes lining things up that bit easier. Quote Link to comment Share on other sites More sharing options...
Dave Miller Posted January 3, 2014 Share Posted January 3, 2014 Looks good. With what do you intend powering it? Quote Link to comment Share on other sites More sharing options...
Andy Green Posted January 3, 2014 Author Share Posted January 3, 2014 Good point Dave, haven't said have I. I have an OS 60 FS. One of the original 4 strokes with open rockers. Andy Quote Link to comment Share on other sites More sharing options...
Dave Miller Posted January 3, 2014 Share Posted January 3, 2014 Posted by Andy Green on 03/01/2014 10:59:39: Good point Dave, haven't said have I. I have an OS 60 FS. One of the original 4 strokes with open rockers. Andy An excellent choice. Quote Link to comment Share on other sites More sharing options...
Andy Green Posted January 3, 2014 Author Share Posted January 3, 2014 Here's a pic of the business end. An original OS 60 FS, I have decided to use a nylon mount and not the engine bearers shown on the plan. Andy Quote Link to comment Share on other sites More sharing options...
Nigel Day Posted January 6, 2014 Share Posted January 6, 2014 That would depend on whether I want to dunk them or not Andy. Quote Link to comment Share on other sites More sharing options...
Andy Green Posted February 13, 2014 Author Share Posted February 13, 2014 Right, back from holidays (surprise trip to Iceland for my 50th) and cleared some jobs, so I've been able to crack on with the build. Higher res photos on my website. Start of the wing build. I'll be fitting ailerons, but not sure how or where yet. I'll build the wings and then decide. It will be a matter of cutting the ribs out and facing off the area. More on that when I get to it. Ribs and spars, held flat to dry. Webbing and leading edge. I normally fit the LE after sheeting the front section but it seems a bit flimsy. Just means careful measuring of the sheeting. Added some end ribs where the cuts will be for the ailerons. Andy Quote Link to comment Share on other sites More sharing options...
kevin b Posted February 13, 2014 Share Posted February 13, 2014 A lot bigger than mine (story of my life) and coming on nicely. kevinb. Quote Link to comment Share on other sites More sharing options...
Tony Bennett Posted February 13, 2014 Share Posted February 13, 2014 that looks nice sir. Quote Link to comment Share on other sites More sharing options...
Andy Green Posted February 13, 2014 Author Share Posted February 13, 2014 Thanks guys, Hope to get them joined later. I know to make it easier I should complete both panels and then join, but there is some method in my madness. With a completed wing I can easily find the middle, and position the cabanes accordingly, and it does look like I've done more that I actually have A Quote Link to comment Share on other sites More sharing options...
Andy Green Posted February 27, 2014 Author Share Posted February 27, 2014 I've been quiet for a couple of weeks, but that doesn't mean I've been idle. Lots done. As usual there are a lot more hi res photos on my website. Wing joining 3mm joiner slot cut then... the wings were set up with 3" dihedral and the joiner angle transferred. Lots of clamps and weights used to hold things true while the glues dries. I used white glue throughout. Andy Quote Link to comment Share on other sites More sharing options...
Andy Green Posted February 27, 2014 Author Share Posted February 27, 2014 Some more work done on the front end. The nose piece added and the side cheeks. All the internals were painted in wing skinning epoxy to fuel proof. It was then roughed out with a (blunt) razor plane. A Quote Link to comment Share on other sites More sharing options...
Andy Green Posted February 27, 2014 Author Share Posted February 27, 2014 Ailerons cut out and 1/4 facing added:- A Quote Link to comment Share on other sites More sharing options...
Andy Green Posted February 27, 2014 Author Share Posted February 27, 2014 With the bottom sheeting done, my attention turned to the positioning of the cabanes. I marked centre lines by measurement of the wing, and the positions of the cabanes. You will notice that the centre of the wing isn't quite in the sheeting join. That why I measured. Andy Quote Link to comment Share on other sites More sharing options...
Andy Green Posted February 27, 2014 Author Share Posted February 27, 2014 Wing Servos: As it has proved successful on my Astro Hog and Super 60 builds I have gone with the servos permenantly fixed into the wings. Half rib lite-ply doublers support the servo with off cuts of spruce to take the screws. Using an off cut of sharpened brass tube I made holes to take the servo wires. Andy (said I'd been busy) Quote Link to comment Share on other sites More sharing options...
Andy Green Posted February 27, 2014 Author Share Posted February 27, 2014 Somewhat controversially I don’t intent to use wires to get the power and signals up to the aileron servos. The rear cabane will carry the power. I have soldered the wires to the captive nut. Here you can see the additional support and some Gorilla glue to strengthen this area. The power leads are joined up in the font and you can see the signal wires waiting for the front fixings to be installed. To make this work I'll have to split the aluminium cabanes - this will be one of the last jobs to be done. Andy Quote Link to comment Share on other sites More sharing options...
Andy Green Posted February 27, 2014 Author Share Posted February 27, 2014 Here is where I’m having some difficulty. I like to know what my incidence angles are, and with no info on the plan decided arbitrarily that 0.3 degrees +ve would be OK. I have the fuselage set to 0, and you can see that currently the wing is at +2.3. This does seem a lot. This image shows my attempt to lower the front of the wing, but this has only lowered it to 2 degrees, it just seems wrong to have to cut so much away. Going back to the plan and doing some measurements and trigonometry, the incidence is about +3. How have other builders gotten on? Andy (up to date) Quote Link to comment Share on other sites More sharing options...
kc Posted February 27, 2014 Share Posted February 27, 2014 Andy, have you recessed the cabane struts into the balsa on the wings? ( as Danny did on his Bistormer)Edited By kc on 27/02/2014 16:59:02 Quote Link to comment Share on other sites More sharing options...
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