dirk tinck Posted December 8, 2019 Author Share Posted December 8, 2019 Before glueing the support in the wing i'm reinforcing the bottom side with 1mm ply that will serve to accept the servo hatch. Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 8, 2019 Author Share Posted December 8, 2019 Last thing to do before closing the wing is to sand everything smooth according to the wingribs.This is done with the help of sanding guide (black spraypaint) and a sanding block. When you start to sand the ribs ,it's time to stop ! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 8, 2019 Author Share Posted December 8, 2019 Almost forgot to put the wires in Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 8, 2019 Author Share Posted December 8, 2019 After closing the wing with the upper wing skins (all with green zap) and trimming the edges ,the next thing to do is placing the middle wing piece (triangular stock hard balsa).For this task i'm placing the wing on a flat board side per side to get the parts in line with the bottomside of the wing. I marked the position of ribs no2 on the wing skin for a reinforcement between wing and triangular pieces.I cant help thinking these parts will brake -off in the event of a hard landing....After all this part holds the wing to the fuse !!! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 8, 2019 Author Share Posted December 8, 2019 After adding the leading edges these will be sanded in shape with a long sanding block and sanding guide.When the sand paper starts to touch the wing skin it's time to stop ! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 8, 2019 Author Share Posted December 8, 2019 In the last pic you can see the location for the reinforcement of the middle wing piece. The wing tips also were sanded after cutting them out of a piece of 10mm balsa. Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 8, 2019 Author Share Posted December 8, 2019 Before drilling the aileron-hinge holes i made up a test piece to make sure where to drill. The metal pins should be in line with the aileron hinge point Quote Link to comment Share on other sites More sharing options...
McG 6969 Posted December 8, 2019 Share Posted December 8, 2019 WAUW, Dirk... you've joined and top sheeted the wing already, your wing servos are close to being sorted and your fuse is more than halfway... or even further in the meantime... Somewhere I'm envious of course, but also a bit 'disappointed' as you're going sóó fast that there is nothing really for me to try to copy... Keep up the great work, young man. Cheers Chris Quote Link to comment Share on other sites More sharing options...
Peter Garsden Posted December 10, 2019 Share Posted December 10, 2019 Posted by dirk tinck on 08/12/2019 16:45:48: First made a servo mount ,allways keeping in mind the low weight -rule no1. Thanks for these photos Dirk, very helpful as I am at exactly the same stage. I am also using exactly the same servo! Question, how are you attaching the servo to the mount - presumably a screw into softwood? I was going to do the same then I thought that if so one would never be able to get the servo out without wrecking the wing? Or have I misunderstood? I was going to line the top sheeting with a piece of ply to give it stability then glue the servo to the ply with laminating resin which will pop off if prised with a screwdriver as per a mouldie, This, however is ply and balsa rather than fibreglass, so it may wreck the wing anyway? What say you? Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 11, 2019 Author Share Posted December 11, 2019 Hi Peter,the servo will be held down by a simpel ply brace that 's screwed into the hard door blocks. EASY TO remove later Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 13, 2019 Author Share Posted December 13, 2019 Hello all, made up the ailerons and hinges but i'm not very satisfied with them...So i ordered some new triangular balsa to try again with other hinges. Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 13, 2019 Author Share Posted December 13, 2019 While waiting for the new ailerons i prepared some parts to connect the all moving tail to his servo.I wasn't pleased with the position of the snake so i altered this a bit too. Quote Link to comment Share on other sites More sharing options...
Phil Cooke Posted December 14, 2019 Share Posted December 14, 2019 The hinged ailerons look great to me Dirk what weren't you happy with were the holes a little over-drilled? The 'fit' when pushed home in the photo looks very neat!? Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 14, 2019 Author Share Posted December 14, 2019 Hi Phil,thanks for the comment,maybe you're right but they look a bit banana too (warped)so i have to change them anyway... Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 14, 2019 Author Share Posted December 14, 2019 Another thing to think about are the speed brakes. If i'm going that way, i have to do it before i join the fuse halves IMO. So i'm giving myself a week to come up with a decent way to get them done. First thing is to locate their position and mark it on the fuse. Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 14, 2019 Author Share Posted December 14, 2019 The idea is to make the doors in epoxy. To protect the fuse ,i'm covering it with plastic foil.Then a few layers of epoxy resin is applied together with cloth.I'm using 4 layers of 200gr. To press the whole down i'm using another plastic foil and some balsa strips and pins and leave it to dry. This should be my first speed brake !The surface won't be 100% but good enough after some sanding. Good thing is that i can still see the outlines i drew on the fuse.When dry i can copy them on the epoxy part and cut it out. Tha plan is to make a complete ''insert'' for the brakes ,meaning they must be fully oprational before mounting them in the fuse. Quote Link to comment Share on other sites More sharing options...
Peter Garsden Posted December 15, 2019 Share Posted December 15, 2019 Very very interesting Dirk. I too am doing the speed brakes but will use a fibreglass fuselage so should be easier. Am very interested how you are going to hinge and operate. Very useful to have a top designer ahead of me. Great blog by the way. Very intriguing, like a mystery novel! Edited By Peter Garsden on 15/12/2019 00:20:07 Quote Link to comment Share on other sites More sharing options...
McG 6969 Posted December 15, 2019 Share Posted December 15, 2019 Great job as usual, Dirk. I wouldn't even try to dream about that 'drooping hinge system' but totally convinced that if somebody can handle it... it will be you. I already answered to your 'MB Weekend Attenders' post. Cheers Chris Quote Link to comment Share on other sites More sharing options...
Peter Garsden Posted December 15, 2019 Share Posted December 15, 2019 I agree with McG - drooping hinge would be a nightmare because it would touch the ground on landing and get ripped off. I notice that you are using 4 sheets of 200gm fibreglass. All I use for the fuselage will be 2 layers of 150gm then a layer of 80 gram followed by some splurge of resin and microballoons to finish. Since you are the master of fibreglass I am sure you are right but I worry about weight particularly in the rear of the fuselage. Also, presumably you are going to make holes in the flap servo support pieces afterwards when you make the hole for the servo arm - I would use a small needle file, I think? I was thinking one had to make holes before putting on the top sheeting, but perhaps it is not necessary? Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 24, 2019 Author Share Posted December 24, 2019 Hi Peter ,you're right about the thickness of the panels. layers of 200gr. will be enough,even 2 layers i guess... As for making the holes in the servo supports :You can do this anytime with a needle file ! Back to the airbrakes : When you look closely to the real sabre you see the panels ''drop'' when they open. IMO the upper hinge must be situated deeper in the fuselage than the lower to get this result so i tested it Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 24, 2019 Author Share Posted December 24, 2019 Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 24, 2019 Author Share Posted December 24, 2019 The first pic in the previous post shows the right angle for the panels , the second pic shows that the panel dusn't drop enough in ''open''position, capiche ?? Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 24, 2019 Author Share Posted December 24, 2019 So, with the drop angle sorted first thing is to put the laminations back in their position on the fuse and copy the panel lines on them Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 24, 2019 Author Share Posted December 24, 2019 For long time i tought that the angled part of the hinge cover had something to do with the complex hinge system but it seems a printing error Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted December 24, 2019 Author Share Posted December 24, 2019 As this is only a test i ''guessed the shape of the hinge parts. I made them out of epoxy plate, a bit to big just in case...They were gleued in place with Z poxy . Then sanded them with a dremel tool as much as possible to save weight ....yes allways ! The hinge pin holes were pré drilled again guessing their position. Looking at it after, they were spot-on ! Quote Link to comment Share on other sites More sharing options...
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