dirk tinck Posted October 11, 2018 Author Share Posted October 11, 2018 Hi all,it's been a while sinds i posted due to a pss weekend in Calais,my wife being hospitalised,but i havent been resting. There's a lot to think about when making wing-plugs like servo positions,landing gear,flaps ,ailerons,etc. Tonight i prepared the wing skins in 2mm balsa. I ordered 125x20 cm planks and glued together 4 pairs. taped them together,turned them arround,opened the gap and zapped with green zap.Pressed down and sanded the seam right away.No worries for little gaps as the sanding dust fills them up , done Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 11, 2018 Author Share Posted October 11, 2018 The plan is to make gear door openings,servo hatches and air brake openings in the plugs before moulding. foto for example Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 11, 2018 Author Share Posted October 11, 2018 I also ordered the landing gear from Electron retracts after a lot of studying scale drawings and mesuring. I hope they will soon be here so i can test-fit them in a foam core .I have kept a few with cutting defaults. So long builders !! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 18, 2018 Author Share Posted October 18, 2018 Hi all,yesterday my retracts were delivered so let's fit. first i positioned the retract opening according to the scale drawing Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 18, 2018 Author Share Posted October 18, 2018 Second to that i made the opening in a test-piece of wing Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 18, 2018 Author Share Posted October 18, 2018 Trouble in paradise !! The wing section is to thin to take the wheels ! In fact this is what i expected... I could look for thinner wheels but the ones i ordered are very light and robust and have the right shape. Only other option is to make the wing section bigger in the area of the wheels. In fact that will make the wing more scale as the real thing has this too (picture) Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 18, 2018 Author Share Posted October 18, 2018 So !! back to foam cutting ! First dig-up the profili program and change the inner wing section some 10% thicker,make up some new aluminium ribs and foam blocks. This is only for the first 30 cm of the wing(retract area)This part will now be 73 mm instead of 62 mm thick.I hope that'e enough ! Back to test fit ! Cheers! Quote Link to comment Share on other sites More sharing options...
McG 6969 Posted October 19, 2018 Share Posted October 19, 2018 Still following, Dirk. Will the center section of the wing be part of the fuselage w/ removable wing tips or is it a one piece wing? Cheers Chris Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 19, 2018 Author Share Posted October 19, 2018 Hi,Chris,the plan is two removable wings,just the first rib will be part of the fuse.Aviation design made the inner section of the wing to be part of the fuse but that one has a wingspan of 3m10...I saw a copy fly on a EDF 128mm and 14s with a weight of 17kg(Jorg Rehm)and did just fine ! My PSS model weighs 8kg,so i'm trying to stay under 12kg auw(EDF) Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 19, 2018 Author Share Posted October 19, 2018 Not much progress today, Cutted the aluminium ribs and prepared the foam blocks for the wings inner sections. Drawn the line that represents the middle of the ribs,it has to be in the exact same position as on the rest of the wings. Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 27, 2018 Author Share Posted October 27, 2018 The new center cores wire cutted Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 27, 2018 Author Share Posted October 27, 2018 Replaced the old center cores by the thicker -ones Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 27, 2018 Author Share Posted October 27, 2018 Looking at the frontside you can clearley see that the thickness of the wing increases towards the root Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 27, 2018 Author Share Posted October 27, 2018 Again i made the retract opening in a test center core.This time the retract sits completely in the wing,i even have some space left Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 27, 2018 Author Share Posted October 27, 2018 Transfered the plan lines and the servohatch positions onto transparent paper ,then overdrawn them on the wingshells Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 27, 2018 Author Share Posted October 27, 2018 Cutted the openings in the balsa all in one time to get two exact the same bottomside shells with reference points at the end.At the same time did the top shells but they only need the opening for the air brakes.For clean edges i used the dremel and a metal ruler Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted October 28, 2018 Author Share Posted October 28, 2018 Before glueing the balsa to the cores,I'm going to add a layer of glass cloth and epoxy to the foam where the openings in the balsa shells supposed to come , this gives me the bottom of the openings later. Pic. for example. Remember this is all done to mould the wings !! I hope you guy's can follow !! It will all be clearer later Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted November 4, 2018 Author Share Posted November 4, 2018 With the wing cores ready,glassed where the openings in the balsa will come,the only thing left to do is to sand the inside of the shells where they meet at the trailing edge.With a metal ruler beside the balsa i can keep the minimum thickness of 1mm at the edge. Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted November 4, 2018 Author Share Posted November 4, 2018 Glueing both upper and bottom shell in one time means everything needs to be ready and in place :30min epoxy will set in not much less time ! Apply the glue to both shells , positioning them on the core ,get the supporting foam parts in place and press the whole down on a flat board.I added all the weight i could find. Not much later the epoxy started curing...Time for a drink !! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted November 4, 2018 Author Share Posted November 4, 2018 An important step behind me :2 perfect balsa covered foam cores with the openings for retracts,servos airbrakes already in place. Very happy with the leading-and trailing edges perfect straight ,washout mesured,and the suface itself !!! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted November 4, 2018 Author Share Posted November 4, 2018 Hi all !! Need some help on thisone ! Any body here with expereance in wing tube-diameters ? I want to use the smallest possible because it 's going right trough the air duct ! there's room in the wing for dia 30mm going 35cm far in the wing or dia 35mm going 30cm far in the wing (each side) Any idea's ? Alu ? carbon ? Wall thickness ? Quote Link to comment Share on other sites More sharing options...
McG 6969 Posted November 4, 2018 Share Posted November 4, 2018 Splendid and very neat job, Dirk. As you wrote yourself, I don't suppose your progress and goals are very 'clear' if somebody never worked with or making moulds for composite parts. I guess it will become more obvious to visitors when you have your moulds ready to be waxed, gel coated and so on. Keep up the great work. BTW, I didn't notice any 'glass' for that intended celebration... not very 'Belgian' like... Cheers Chris Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted November 4, 2018 Author Share Posted November 4, 2018 Hi,Chris I'm well awere of the fact that moulding parts can be complicated for unexperianced visitors but i'm trying to keep it as simple as possible. The forms you want to make in polyester or ,in this case epoxy,have to be made first in any material you choose to work with,possible cheap and strong enough so it dusn't deform when handling.Every scratch,line,bump or dent will be there in the moulded part.In fact , this is the easy part And no , i'm not a BEER Belgian cheers ,Dirk Quote Link to comment Share on other sites More sharing options...
sean burchfield Posted November 8, 2018 Share Posted November 8, 2018 Ive been watching your work with great interest. A fabulous aircraft to model and clearly a real craftsman at work. Not many of you left now it seems. Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted November 17, 2018 Author Share Posted November 17, 2018 Evening all ! I was a few days off the map but here we go again anding the leading edges Quote Link to comment Share on other sites More sharing options...
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