Marcel111 Posted May 23, 2017 Share Posted May 23, 2017 Awesome work on the exhaust, just wow! Riveting looks perfect also. Cheers, Marcel Rainer Hoffmann 1 Link to comment Share on other sites More sharing options...
Rainer Hoffmann Posted July 15, 2017 Author Share Posted July 15, 2017 Thanks for you kind words guys, much appreciated. I haven't had a lot of bench time lately. I have restarted work on the intakes. So far it was mostly filling and sanding the inside surfaces in preparation for skinning with sheet aluminum. Nothing worth showing, though. But the project is still alive and well ;-) Cheers Rainer Link to comment Share on other sites More sharing options...
Rainer Hoffmann Posted August 12, 2017 Author Share Posted August 12, 2017 (edited) G'day Gents, here is a small update on the Jaktviggen. Not much to show, but I had some success in forming the rudder actuator fairing from sheet aluminum. That worked really well. I started with a makeshift female mould and a male former: The male former looks quite awful, but that's because it's been used twice already when this pic was taken. The aluminium left some nasty black residue on the former. I place a some sheet aluminium on the female mould and then stick that together with the male former in a vise. some brute force on my behalf then does the job: And here is the result fresh from the press: Fwd is to the right. There are some wrinkles at the bottom, but they are taken care of by some sanding, nothing to worry about. Here is the fairing after some clean-up: I'm quite happy with the result. Here it is on the vertical stabilizer: The bottom doesn't conform to the airfoil of the stabilizer yet, but again, that's not a big deal. The fairing is still way too long. But it will be cut approximately at the dotted red line. The rear part then slides into the forward part, as is the case on the real deal. The fairing will then line up with the rudder trailing edge. That's it for today. Thanks for looking! Cheers Rainer Edited August 12, 2017 by Rainer Hoffmann patricksparks, Starfighter, HerculesPA_2 and 8 others 11 Link to comment Share on other sites More sharing options...
airscale Posted August 12, 2017 Share Posted August 12, 2017 bloody hell - thats amazing Rainer I have tried similar things, but found I tore the metal as it couldn't take the 'drop' in the press - how did you avoid that as the female mould looks pretty deep? an absolutely stunning result on such a complex bunch of curves - it's flawless bravo - inspires me to look at making shapes another way carry on! Peter Rainer Hoffmann and Derek B 2 Link to comment Share on other sites More sharing options...
Rainer Hoffmann Posted August 12, 2017 Author Share Posted August 12, 2017 (edited) bloody hell - thats amazing Rainer I have tried similar things, but found I tore the metal as it couldn't take the 'drop' in the press - how did you avoid that as the female mould looks pretty deep? an absolutely stunning result on such a complex bunch of curves - it's flawless bravo - inspires me to look at making shapes another way carry on! Peter Peter, I guess It's the alloy and it's (heat?) treatment that makes the difference. I used a very soft 0.15 mm aluminium sheet that is used for embossing (that's a ladies thing...). I didn't even anneal the stuff. But I agree, I was worried it would tear during the process. After this experience I feel confident, that I can coax the stuff into pretty complex shapes. Cheers Rainer Edited August 12, 2017 by Rainer Hoffmann 109, Greg W and Derek B 3 Link to comment Share on other sites More sharing options...
allthumbs Posted August 12, 2017 Share Posted August 12, 2017 Brilliant Rainer! I am so impressed by your work, and that of the other resident metalsmiths. Rich Rainer Hoffmann 1 Link to comment Share on other sites More sharing options...
Rainer Hoffmann Posted August 12, 2017 Author Share Posted August 12, 2017 Brilliant Rainer! I am so impressed by your work, and that of the other resident metalsmiths. Rich Thanks a lot Rich. I'm still learning, though. But aren't we all? Cheers Rainer Derek B 1 Link to comment Share on other sites More sharing options...
Jim Barry Posted August 12, 2017 Share Posted August 12, 2017 That is some intelligent use of brute force! I'm looking for this embossing metal myself. Rainer Hoffmann 1 Link to comment Share on other sites More sharing options...
LSP_Kevin Posted August 12, 2017 Share Posted August 12, 2017 Beautiful work, Rainer! Kev Rainer Hoffmann and Derek B 2 Link to comment Share on other sites More sharing options...
109 Posted August 22, 2017 Share Posted August 22, 2017 Hey, not "only" styrene but also sheet metal work at its best! Did you anneal the aluminum sheet? Bye Derek B and Rainer Hoffmann 2 Link to comment Share on other sites More sharing options...
Rainer Hoffmann Posted August 23, 2017 Author Share Posted August 23, 2017 Hey, not "only" styrene but also sheet metal work at its best! Did you anneal the aluminum sheet? Bye No need to anneal the aluminium. It's very soft by nature. It's used for embossing, so it has to be soft. I get it at a local, non modelling related hobby shop. Cheers Rainer 109, Greg W and Derek B 3 Link to comment Share on other sites More sharing options...
109 Posted August 23, 2017 Share Posted August 23, 2017 (edited) Ah, Prägefolie? Habe ich via amazon.de mal besorgt. Cu Edited August 23, 2017 by 109 Link to comment Share on other sites More sharing options...
Guyman1 Posted August 23, 2017 Share Posted August 23, 2017 Simply beautiful work so intricate and acute a pleasure to watch unfold. Guy Rainer Hoffmann 1 Link to comment Share on other sites More sharing options...
Rainer Hoffmann Posted August 23, 2017 Author Share Posted August 23, 2017 Ah, Prägefolie? Habe ich via amazon.de mal besorgt. Cu Genau, Prägefolie ist das deutsche Wort. I forgot! Cheers Rainer Link to comment Share on other sites More sharing options...
Rainer Hoffmann Posted September 16, 2017 Author Share Posted September 16, 2017 (edited) Hi guys, some minor progress on the Viggen. I installed the rudder actuator fairings. There is a large one on the left side and a smaller one on the right side of the vertical stab. Here are some pics: Obviously there is some clean-up needed to remove glue residues, but I'm fairly happy with those fairings. I also cut up the air intakes and prepared them for skinning with aluminium sheet: Some more sanding and I can start the skinning. Here is a view of the compressor face as it would appear when seen from the front of the intake. The inner surface of the intake is not in place yet. Skinning those intakes will be a bear. I'm still not sure how I will tackle that. We'll see. Thanks for looking. Cheers Rainer Edited September 16, 2017 by Rainer Hoffmann 109, Greg W, Marcel111 and 19 others 22 Link to comment Share on other sites More sharing options...
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