SMARTLY Posted July 12, 2015 Report Share Posted July 12, 2015 Just a flat orange so it doesn't reflect any light from the sun. Quote Link to comment Share on other sites More sharing options...
Rich Posted July 13, 2015 Report Share Posted July 13, 2015 It sounds like you know what you're doing Adam, I wouldn't have a clue where to start with that. 1 Quote Link to comment Share on other sites More sharing options...
adam_r Posted July 13, 2015 Author Report Share Posted July 13, 2015 Rich... To be honest i dont know wtf i was doing. I have the idea of what should sorta go on with this fix. But doing the job the right way... Well we will see how strong it is when shes back in the air. Tbh i was s***ting myself when i took the dremel to the tail. It was not something i wish to repeat in a hurry. Also i found out that thr construction of the skin is very interesting. It uses a 40gsm cloth then a layer of rohacel (is that the right Spelling?) then another layer of 40gsm cloth. So in essence is essentially a sandwich of 2 layers of glass cloth with some 0.5mm foam in the middle! Im amazed on how strong it is. Quote Link to comment Share on other sites More sharing options...
Tony Posted July 13, 2015 Report Share Posted July 13, 2015 Does it have a resin base. Quote Link to comment Share on other sites More sharing options...
adam_r Posted July 13, 2015 Author Report Share Posted July 13, 2015 Looks like they make it by lightly wetting a glass sheet. Remove any excess resin. Lay the foam down. Then lay another peice of glass cloth down that has been lightly wetted. Then they fold this around a mold and vacuum bag it. Very strong yet light way of making a complex shape Quote Link to comment Share on other sites More sharing options...
adam_r Posted July 14, 2015 Author Report Share Posted July 14, 2015 I forgot to take a picture of the 'fillet' that has not filled the void. .. I have nowglued that in place and sanded back the paint.... Oh what a flipping joyous task! Had to be very careful not to penetrate the top skin... Which me being me did a dew times :cry:. Anyway. Here is a few progress pics.. Quote Link to comment Share on other sites More sharing options...
Tony Posted July 15, 2015 Report Share Posted July 15, 2015 Delicate work but your getting there and doing well i might say. Quote Link to comment Share on other sites More sharing options...
Rich Posted July 15, 2015 Report Share Posted July 15, 2015 Looks like a good repair mate Quote Link to comment Share on other sites More sharing options...
adam_r Posted July 15, 2015 Author Report Share Posted July 15, 2015 You cant really see the fibre glass layers here.. Basically after sanding yesterday. The surface was prepped with IPA (no not beer) and then the glass cloth was sprayed with a spray mount adhesive. It was then cut to size and initially laid out on the surface to check for fitment. The above was done twice as i had 2 sheets, one covers the majority of the damage plus a 1inch overlap. Then next covered the same plus another 1inch overlap to provide more strength. I may add another layer tomorrow once this has set and i can determine its strength. Resin was then mixed and very sparingly applied. Once all the cloth was see through (wetted) i then used a roller to remove any air trapped from pushing resin through the fibre. Then once thatwas done kitchen roll was then dabbed on the surface to remove as much excess resin as possible. Hopefully it should dry with a low / no sheen to the surface. Update tomorrow Quote Link to comment Share on other sites More sharing options...
adam_r Posted July 15, 2015 Author Report Share Posted July 15, 2015 Added a few pics to show how light / thin the 40gsm glass cloth that im using is. Excuse my horrible nails ... Yuk Quote Link to comment Share on other sites More sharing options...
Tony Posted July 16, 2015 Report Share Posted July 16, 2015 Looks a super messy job..... I really hate fibreglass it's so easy to open a whole world of rubbing down. Quote Link to comment Share on other sites More sharing options...
adam_r Posted July 16, 2015 Author Report Share Posted July 16, 2015 Tony. Its not to bad actually. If tiem is taken is farily simple. If you use the 3m contact spray on the glass cloth before application it holds everything together and allows you to remove all wrinkles before you get to the stage where resin is applied Quote Link to comment Share on other sites More sharing options...
Tony Posted July 16, 2015 Report Share Posted July 16, 2015 Things have changed since my day then..... I just recall the fibre getting stuck to everything other than the target but saying that in my day the resin wasn't a spray. Quote Link to comment Share on other sites More sharing options...
adam_r Posted July 16, 2015 Author Report Share Posted July 16, 2015 Tony the resin isnt a spray! I used the 3m spray adhesive to give the clothy a 'tacky' surface. This helps it hold together and allows you to lay it down on the surface you want and allow you to reposition it as much as you like. Once happy with the position you can then mix the resin and apply it via a brush. Quote Link to comment Share on other sites More sharing options...
Tony Posted July 16, 2015 Report Share Posted July 16, 2015 Good idea..... I found as you dab the resin on the fibre would disintegrate but that was maybe my aggressive dabbing at fault. Quote Link to comment Share on other sites More sharing options...
adam_r Posted July 16, 2015 Author Report Share Posted July 16, 2015 Tony. Where you using chopped strand or woven cloth? Quote Link to comment Share on other sites More sharing options...
Tony Posted July 16, 2015 Report Share Posted July 16, 2015 Woven cloth i think..... Stuff just fell apart once wet. Quote Link to comment Share on other sites More sharing options...
adam_r Posted July 16, 2015 Author Report Share Posted July 16, 2015 Very odd. The cloth should be on the surface you want it to adhere to before you wet it. Also you dont 'brush' in the resin you dab it on with a short bristle brush. Quote Link to comment Share on other sites More sharing options...
JamesV70R Posted July 16, 2015 Report Share Posted July 16, 2015 That's a tidy looking repair! Hopefully the other side won't go on your next flight! Going to be doing some fibreglass (Well, really should be using Kevlar ... ) repairs to my Marblehead in the next few weeks, slight hull-deck leak where she's taken a bash a few years ago. Only an issue in high wind though, fortunately! The difficulty is the patch I want to put on needs to go in through a 2" square hole, and is a reasonably tight angle, barely inside the reach of fingers. Then its on with re-fairing both the keels, which have also taken some bumps and bangs along their life, but they are un-painted carbon fibre, so its going to be a bit harder to disguise any repairs, so I may just have to use clear epoxy with no filler or glass, and hope that it holds up under the small amount of flex. http://i.imgur.com/GDIaGJA.jpg James Quote Link to comment Share on other sites More sharing options...
adam_r Posted July 16, 2015 Author Report Share Posted July 16, 2015 James. Nice boat! If you need any guidance go on to RCgroups forum. There is a wealth of knowledge on there and they will be able to assist. As scarey as it sounds, cutting more to gain access to do a repair is better than trying to fiddle about. Technically i could have repaired mine without cutting but i bet i would have made a complete mess of it. If your CF is unpainted then i would be tempted to fix the damage then use a light weave cloth and resurface the keel. Then you can either use a gel coat or resin to seal it. With regards to the Vtail... I dont think the other side has any issues, there has been no break or damage on that side.. From doing my work, it appears that the side i fixed has broken before so im glad im fixing it properly now Quote Link to comment Share on other sites More sharing options...
adam_r Posted July 19, 2015 Author Report Share Posted July 19, 2015 Well i tool her up for her first flight after the repair. I went up to some local cliffs as the wind was a nice steady onshore breeze of around 12mph. Glider had a 10 second motor run to get her up from hand launch and i was flying for over 80 minutes before i decided to land. I did record the flight but the camera ran out of battery 50 minutes in to the flight. I didnt feels comfortable trying put the fpv as i didnt have a watcher. Quote Link to comment Share on other sites More sharing options...
andyelcomb Posted July 20, 2015 Report Share Posted July 20, 2015 I took my r/c powered glider down from the garage roof yesterday but when I put it all together I found that one of the micro servos had failed. Its a cheap 3 channel plane anyway by I was shocked at how much a replacement servo was - $3 delivered from Hong Kong! How can they possible make any money out of stuff like that - even if they sold thousands! Quote Link to comment Share on other sites More sharing options...
adam_r Posted August 28, 2015 Author Report Share Posted August 28, 2015 Well on my birthday my wife gave me a little quad copter (hubsan x4) its flippinbrilliant.. By far the most fun i have had with any toy ever. Anyway... I was bitten by the quad bug.... And have built myself this: Its a 250 size quad.. All carbon frame 25A speed controllers blah de blah.... Anyway..so far i have only taken it out for a few careful hover flights whilst its being set up.. Scarey.... But fun Quote Link to comment Share on other sites More sharing options...
SMARTLY Posted August 28, 2015 Report Share Posted August 28, 2015 How big is that trampoline? Quote Link to comment Share on other sites More sharing options...
adam_r Posted August 28, 2015 Author Report Share Posted August 28, 2015 1000mm x 700mm Quote Link to comment Share on other sites More sharing options...
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