toto Posted April 28 Author Share Posted April 28 Hi Ron, I have gorilla glue but can't remember if it's the brown variation. I'd need to check. If not ..... it may need to be epoxy. I'll probably post up what I have when I hit the shed in a wee while. Drinking copious amounts of coffee whilst trying to come to and contemplate a shower at the moment. Nothing ever happens fast on a Sunday unless I'm getting ready for a flying session. Cheers Toto Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 OK ......... In the shed ....... here is what I have in my armoury for today .... so far. First up ..... the all important dremmel .... a selection of various types of potential stiffeners from cocktail sticks .... upwards .... some glues ... but no Gorilla brown .... some epoxy if favoured ..... some micropore ...... and to give you an idea of the sectional sises of the wooden sticks ..... and the areas that I intend to utilise the micropore for .... and the other side .... I would also like to fill in the slots where the wing hinges previously were ..... and ..... I'd fill these in as using the fresh areas of foam in between, may weaken the entire edge of the foam. so my intention is to cut the fresh slots for the new hinges and fill in between as I go. I'll have to think what I will use to do that. maybe just neat epoxy itself as when it hardens, it will be as good as anything. I will be spending about 10 minutes before starting to think out my plan of action but think I will start with drilling a couple of holes through the plastic former along the wings length to insert the wooden strengthening sticks. So ...... if you want to chip in telling me why this approach is wrong ..... better make it fast. now ..... for a coffee and a ponder. cheers toto Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 So, I have drilled two initial pilot holes really just as it will be easier to penetrate the plastic with a thinner drill for the first time. I will have to redrill them with a thicker drill to match the chosen wood section diameter. I could maybe get away with a third hole. I'll think about that. maybe one at more of a diagonal attitude. To give an idea how far the drill has penetrated .... and the other. I will need to go an see what other drills I have as I want the wooden sections to be a comfort fit once the glue or epoxy has been applied. ( still undecided ) I am still leaning towards the epoxy since I dont have the gorilla brown glue. more as it happens. toto. Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted April 28 Share Posted April 28 In my experience, GG clear and epoxy are on a par - no mixing with GG of course. @toto that looks about right, either of the larger ones - the middle sized one will allow for greater drilling inaccuracies 🙂 P.S. the piece in question is an elevator, not a wing. 9 P6 Quote Link to comment Share on other sites More sharing options...
Outrunner Posted April 28 Share Posted April 28 No need to drill into the foam, just push your gluey sticks into it and it will be a nice firm fit. Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 What a time for the laptop and the camera to have a fight. OK here is what I have done .... rightly or wrongly. Using .... Apologies for the slanty photos. I'm using my pad for the first time and have not quite mastered it in termsof changing photo orientation. Still .... I'm sure you get the picture. Back soon Toto 1 Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 Next up is looking at strengthening the surface cracks. I have found the micropore to be a bit on the thick side although not ruling it out. I hade thought of some kind of bandage or gause impregnated with CA or watered down epoxy using IPA to thin it out. The bandage ( typical first aid box variety ) is really just a sort of thin netting to take the adhesive ( whichever variety ) and bridge the surfaces giving a hard finish a bit like cataloy. ..... Not sure. If I applied the bandage ( whatever ) I would put little pin pricks through the bandage into the foam to give channels for the watered down expoxy somewhere to flow and grip the foam ..... ideas on a psotcard .... another 5 or 10 minute intermission. toto Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 OK..... I've went with micropore ..... wrapped around the piece with the fracture centred beneath it ..... And ..... And ...... You get the picture. My next step was to make a series of puncture marks all over the surface area of where the micropore covered using a sharp scalpel. ..... not digging holes .... just puncturing the micropore and just into the foam. The idea being to let the diluted epoxy ( which is what I am going to go with ) penetrate the micropore into the foam to help key the materials together. The diluted epoxy ( diluted with IPA ... Isopropyl alcohol ) will run into the puncture marks through to the foam for a better grip. We will see what the end finish is like and if necessary, the surface may be good enough to take a light sanding. The epoxy will be brushed on then left to set. This will just leave the two pieces to be mated with the hinges. More later. Away to mix the epoxy. Toto Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted April 28 Share Posted April 28 Sorry toto, just noticed that GG is wood glue. Use the epoxy. Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted April 28 Share Posted April 28 My micropore tape, from Boots is very thin - much thinner than yours, conforms to changes in surface etc. well, and doesn't need pricking because it's porous...... Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted April 28 Share Posted April 28 But..... it's going to be usable. Don't forget to check the balance of the model after you've finished. 1 Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 (edited) Hi Grump, No worries ..... diluted epoxy was used. The micropore will do the job. The repair will always stand out to a certain extent even once painted. The main thing is strength and fitness for purpose I suppose. I have completed the application of the epoxy and will let it fully cure ... I'll give it at least 24 hours before tackling the hinges. As you can see, a good soaking ... As I mentioned, it will hopefully take a light sanding and a bit coverage with white paint once finished. It's not quite as messy as the camera makes it look. Next....the hinges ..... tomorrow for that .... so far so good I think ... for someone that was crapping it to have a go. Not the most cosmetically sound job but I think it will have the required strength. Cheers Toto Edited April 28 by toto 1 Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 Just thinking .... the hinges will have to be midweek at the earliest as I am off to Sellafield tomorrow not returning until Tuesday evening at the earliest. .... never mind .... no rush at it won't be in immediate use or any time soon that I can see so no drama's. Good to get it back into a serviceable position though. Cheers Toto Quote Link to comment Share on other sites More sharing options...
Learner Posted April 28 Share Posted April 28 That will be the strongest part of the plane! 1 Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 Don't count your chickens just yet. I still have the hinges to go yet .... Confidence is high though. This should have been attempted before noe but I was not really happy tackling it before now. Today I developed a sloppy so wot cavalier attitude about it and just got stuck in. .... in for a penny ....... Once all the strengthening and hinges are complete I may be able to tackle the cosmetics to at least pass the 3 metre rule. .... although I'm not to fussed about that as once in the air .... its all more or less out of sight. Toto 1 Quote Link to comment Share on other sites More sharing options...
Tom Gaskin 1 Posted April 28 Share Posted April 28 (edited) As Ron says, cocktail sticks and GG brown will fix it a treat. Drill a hole (or two) from the end of the elevator (last but one photo) deep enough to pass into the undamaged part by about 20mm - pin the elevator down so that it will stay square and true as the glue expands. Tom Ps: Sorry, my browser hadn't updated all of the replies when I posted! Edited April 28 by Tom Gaskin 1 Saw all updated replies Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 No worries good Sir. It's all pinned and glued now and the outside given a bit support / protection. Hinges next. Stay tuned Toto Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted April 28 Share Posted April 28 Buy some Gorilla Glue brown, it will come in handy! Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 Will do Ron. I like to keep a mixture of lotions and and potions for every eventuality ..... Toto Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 Checked the repair .... drying nicely. Still a little tacky but expected due to the fact the epoxy was diluted with IPA. Should reach its full strength by late tomorrow or certainly by the time that I have returned from Sellafield on Tuesday evening. Hopefully a nice strong repair. Fingers crossed. Toto Quote Link to comment Share on other sites More sharing options...
leccyflyer Posted April 28 Share Posted April 28 17 minutes ago, toto said: Checked the repair .... drying nicely. Still a little tacky but expected due to the fact the epoxy was diluted with IPA. Should reach its full strength by late tomorrow or certainly by the time that I have returned from Sellafield on Tuesday evening. Hopefully a nice strong repair. Fingers crossed. Toto Why did you dilute the epoxy Toto? Quote Link to comment Share on other sites More sharing options...
toto Posted April 28 Author Share Posted April 28 I thought that it would run down into the puncture marks that I made through both the micropore and the foam. Also I brushed the whole of the surface of the micropore with the same mixture and did not want a big thick heavy coat. Just an idea ...... I'm full of them .... Toto Quote Link to comment Share on other sites More sharing options...
leccyflyer Posted April 28 Share Posted April 28 If you want the epoxy to be a bit more runny and less viscous the best way to achieve that is to warm it, with a hot air gun - that will accelerate the setting time, but it will flow like runny honey, rather than treacle and you aren't potentially compromising the strength. Quote Link to comment Share on other sites More sharing options...
Eric Robson Posted April 28 Share Posted April 28 1 hour ago, toto said: Checked the repair .... drying nicely. Still a little tacky but expected due to the fact the epoxy was diluted with IPA. Should reach its full strength by late tomorrow or certainly by the time that I have returned from Sellafield on Tuesday evening. Hopefully a nice strong repair. Fingers crossed. Toto I used to get diluted with IPA, Indian pale ale, it made me runny. Good to see you fixing the problem Toto, there is a lot of satisfaction in being able to repair something rather than depend on sometimes non available spares. 2 Quote Link to comment Share on other sites More sharing options...
toto Posted April 30 Author Share Posted April 30 Well .... back from Sellafield today. Not had the chance to hit the shed to check the repair as yet. Had some accounts that I needed to tidy up when I came back. Now just opened a beer. I may still get into the shed yet but if not ...... then it's tomorrow and looking at the fitting of the hinges. I'm looking at filling in the slots left from the previously fitted hinges as well to add a bit strength back into the edges of the foam. We'll see. Cheers for now Toto Quote Link to comment Share on other sites More sharing options...
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