Michael Morris Posted September 9, 2020 Share Posted September 9, 2020 I recently bought a 1/144 scale resin kit of the T-38 jet trainer that was advertised as coming with a clear canopy. To cut a long story short the canopy turned out to be translucent rather than transparent and I'm pretty certain they are actually cast from resin. The part is only about 3 cm long. Can anyone suggest a method for making a replacement canopy that is clear(er)? Thanks Link to comment Share on other sites More sharing options...
Black Knight Posted September 9, 2020 Share Posted September 9, 2020 Plunge or 'crash' moulding. A new modelling talent for you to learn. Basically. 1. fill the old canopy with blue-tac or milliput. Before the milliput hardens push a bit of cocktail stick or sprue into it. 2. in a piece of thin MDF or hardboard cut a hole roughly the same shape and slightly larger than the canopy, its 'footprint' shape 3. use staples or thumb tacks to attach some thin clear plastic over the hole. the plastic from vac packaging or the side of a cheap cola bottle 4. heat that mounted plastic over a hot toaster - protect your hand from the heat. 5 when the clear plastic goes all floppy quickly shove your mounted old canopy through into the plastic and through the hole 6 you now have a thin clear plastic canopy. 7 it may take a few attempts till you get a good 'un alternative to 5. 5a have the mounted canopy supported vertically and pull the floppy plastic down over it 2 Link to comment Share on other sites More sharing options...
DMC Posted September 9, 2020 Share Posted September 9, 2020 I can only suggest plunge moulding. However, an accurate example would depend on your scratch building skills. In the photo you can see that I’ve plunged an F4U canopy. The male mould is polymer clay, which can be smoothly polished. A wooden mould would probably leave the grain impressions on the clear canopy. The female mould is balsa. Cheap and easy to work with. Plunge moulding takes some practice and for a one-off is probably impractical. Can’t think of any other way. Sorry, not much in the way of help. Cheers Dennis Link to comment Share on other sites More sharing options...
wellsprop Posted September 10, 2020 Share Posted September 10, 2020 Ditto both these replies, it's what I do! I'm just wondering if there is a friendly BM'er with a vacform machine... Link to comment Share on other sites More sharing options...
Marklo Posted September 15, 2020 Share Posted September 15, 2020 (edited) Unless it’s a very complex profile plunge moulding is generally effectiveness easier. That said It’s not that hard to make a vacuum box. This is a plunge molded canopy for a 1/72 ta154 I made last week. Again plunge molded canopy for a 1/48 Caproni Campini. It’s a pretty complex shape incorporating the upper fuselage deck but molded easily enough. 1/48 scale Ju87a again plunge molded canopy. Edited September 15, 2020 by Marklo Link to comment Share on other sites More sharing options...
JWM Posted November 7, 2020 Share Posted November 7, 2020 The most difficult canopy I did using this plunge technology was Me 410/210. So the two sides were done separately and then glued with central part made of separated elements (5 parts maybe) and then all was sanded and polished. The male form I made from a piece of teflon (PTFE), details here: Regards J-W Link to comment Share on other sites More sharing options...
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