dirk tinck Posted May 10, 2019 Author Share Posted May 10, 2019 Tomorrow i do the side moulds .they're already waxed and the de-mould film is drying.Stay tuned ! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 18, 2019 Author Share Posted May 18, 2019 Hello again, The moulding continues ! With the root and tip -sides waxed and the PVA (polyvinylalcohol) dry they are ready to take the moulding resin and the epoxy with the glass cloth , same as the other parts .You have to be careful not to disturb the PVA. Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 18, 2019 Author Share Posted May 18, 2019 And the tip side : Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 18, 2019 Author Share Posted May 18, 2019 Wth the two new moulds dry but still in place its time to clean up the edges Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 18, 2019 Author Share Posted May 18, 2019 With the edges cleaned up (sorry :no pic) i placed two supports over the wing at 1 third and 2 thirds off the wingspan to make sure, when the mould is turned over to make the other side,it dousnt get warped. This is visible in previous pics. So let's turn it over ,remove the supporting board,loose the foam and clean -up the underside ! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 18, 2019 Author Share Posted May 18, 2019 Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 18, 2019 Author Share Posted May 18, 2019 The black part in the foto before the last is the underside off the three moulds wich are going to serve now to work against to make the opposite moulds. therefore they need to be waxed like the wing...again. Two more to go and we have a complete wing mould !Normally three (like the upper side :tip , center and root)but i'm going to try to make the bottom side in two parts :center with tip and root side. I'm sure it will come off....i think. In the last foto you can see the metal braces to keep the moulds together(bolted to the vertical side off the parts) So this evening i'm doing the first bottom part...fingers crossed ! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 18, 2019 Author Share Posted May 18, 2019 First bottom mould is a fact !!On the right side you can see again a supportig board (vertical).This will be the border between the two bottom moulds .This time no division at the tip.(Unlike the upper side) Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 18, 2019 Author Share Posted May 18, 2019 Tomorrowas in today...i'm doing the root-side part. So this is a lot to swallow i guess...Please if something isn't clear ,tell me and i will gladly explain ! Sorry also if there are errors in my scool Englishbut i do my best! Cheers ! Dirk. Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 18, 2019 Author Share Posted May 18, 2019 hrfzejfherjkgfkklsd;gfklg, School !! Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted May 18, 2019 Share Posted May 18, 2019 Forgive me for asking, Have you made the wing already, then waxed it buried half the wing then covered the exposed part of the wing in fibreglass to make one half of a wing mould then repeat the process on the other side . So you end up with a split wing mould . Steve Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 18, 2019 Author Share Posted May 18, 2019 Correct Stephen !I couldn't have said it better. I know it sounds crazy but in the end it will be faster to make multiple aircraft in the moulds that to make them one by one from scratch.I also hope to get the weight down and the strenght up compared to a wooden airframe.Thanks for the comment ! Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted May 18, 2019 Share Posted May 18, 2019 No Problem, I am considering doing the same with one of my models. That is why i am watching this tread with great interest. Steve Quote Link to comment Share on other sites More sharing options...
Bob Jennings 1 Posted May 23, 2019 Share Posted May 23, 2019 Fascinating Dirk. Your patience is endless. Very impressive. Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 24, 2019 Author Share Posted May 24, 2019 Thanks Bob,patience is the word,but i have also "bad" days,believe me !On such days i read the comments to motivate me and think at the result in the end and MOVE-ON !! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 24, 2019 Author Share Posted May 24, 2019 So ,computer time ! With the first bottom wing mould dry ,time to clean up the edges Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 24, 2019 Author Share Posted May 24, 2019 Take away the supporting board and foam blocks Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 24, 2019 Author Share Posted May 24, 2019 Clean up and wax.....again Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 24, 2019 Author Share Posted May 24, 2019 Sealing with PVA Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 24, 2019 Author Share Posted May 24, 2019 With the PVA dry,it's time for epoxy and glass : 50 gr ,100gr , 5x200gr gives a thickness of around 2mm. The little glass cutting are added for future laminations like future layers but in this case it's to accept some reinforcements to strenghten the mould. they garanty a good adhesion. I also placed reinforcements to the center-mould at a third and two thirds of the span .They also help to prevent the mould from warping when turned arround for laminating the actual wing...Yes were getting there !! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 25, 2019 Author Share Posted May 25, 2019 Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 25, 2019 Author Share Posted May 25, 2019 Next step before "unwrapping" the 5 moulds, is to connect them all with bolts .Not just drill and put a bolt in ,nope ! The bolts are there to make sure that whenever the moulds are bonded,the're at the exact same position every time. This is my system to achieve this: Drill the holes with a 6.5mm drill. Place a 2cm long piece of broom-stick(drilled in the center with a 6.5 mm drill ) on both sides of the composition with 30min epoxy and place a 6mm bolt in the hole. before the epoxy is cured , remove the bolt and let dry. When cured , drill again with a 8 mm drill. let the 6.5mm hole guide the 8 mm drill so that you have a perfect 8 mm hole. Now fit a 8mm bolt with a UNTHREADED part in the hole and you have a perfect fit without play ! You can buy special systems for the same goal but hey,that 's money saved !! If you neglect this,you end up with a difference in height on the centerline of the moulded parts wich you have to solve with filler and i hate that when it's possible to prevent. Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 25, 2019 Author Share Posted May 25, 2019 When everything bolted together ....unbolt it. Now we can carefull try to de-mould the whole system after a clean-up. Guess what !!The wing popped out without mechanical intervention !!Me happy !! Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 25, 2019 Author Share Posted May 25, 2019 After a good clean-up of the moulds (remember water dissolves the PVA) i will clean up the flap and aileron moulds. After that it's time for the second wing. The next series of foto's illustrates the de-moulding of the flaps and ailerons Quote Link to comment Share on other sites More sharing options...
dirk tinck Posted May 25, 2019 Author Share Posted May 25, 2019 Quote Link to comment Share on other sites More sharing options...
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