zebra Posted October 6, 2022 Share Posted October 6, 2022 My third build will be a Trumpeter 1/72 F-106B, to be built as NASA 616, which was used to study inlet and nozzle designs for the supersonic transport programme in the 1960s. They mounted two General Electric J85 engines (as used on the T-38 and F-5) and tested several different intake and nozzle designs on the one on the left, with a standard intake and nozzle on the right. Here's a NASA photo: I'm going to build it in the configuration in the photo, with the conical "plug" nozzle on the test engine. I'll make the engines on the 3D printer, and I've found NASA test reports online that include drawings to work from. I'm probably a week or two away from starting, but will be getting on with it soon. Julian 29 Link to comment Share on other sites More sharing options...
Col. Posted October 6, 2022 Share Posted October 6, 2022 You've picked a cool project Julian and one I've never seen done before 1 Link to comment Share on other sites More sharing options...
SafetyDad Posted October 6, 2022 Share Posted October 6, 2022 1 hour ago, Col. said: You've picked a cool project Julian and one I've never seen done before Likewise! Excellent choice of subject! SD 1 Link to comment Share on other sites More sharing options...
Courageous Posted October 6, 2022 Share Posted October 6, 2022 That'll look odd but in an interesting sort of way. Stuart 1 Link to comment Share on other sites More sharing options...
Corsairfoxfouruncle Posted October 7, 2022 Share Posted October 7, 2022 Well this is something Ive never seen before, of course now I will need to someday build this thank you. 😉 1 Link to comment Share on other sites More sharing options...
zebra Posted October 8, 2022 Author Share Posted October 8, 2022 Thanks everyone. I'd never heard of this one until I was given a very interesting book for Xmas last year - Testbeds, Motherships and Parasites by Frederick Johnsen. It's page after page of modelling inspiration! I've not started on the kit yet, but have done the test engines. The CAD was surprisingly straightforward - just took a couple of hours - here they are: more soon Julian 18 Link to comment Share on other sites More sharing options...
Courageous Posted October 8, 2022 Share Posted October 8, 2022 Always wondered, how do you get rid of striations on your print? Stuart Link to comment Share on other sites More sharing options...
Mycapt65 Posted October 8, 2022 Share Posted October 8, 2022 On 10/6/2022 at 9:17 AM, Courageous said: That'll look odd but in an interesting sort of way. Stuart Right!? It's like the arousing odd looking girl that you can't figure out what's hot about her. . 1 3 Link to comment Share on other sites More sharing options...
zebra Posted October 8, 2022 Author Share Posted October 8, 2022 2 hours ago, Courageous said: Always wondered, how do you get rid of striations on your print? Stuart A light sanding (which I've done on these already) plus a coat of Mr Surfacer 1000 followed by another light sanding usually does the trick 2 hours ago, Mycapt65 said: Right!? It's like the arousing odd looking girl that you can't figure out what's hot about her. . In this case a very odd looking girl with 3 exhaust nozzles. And in the interests of keeping this thread family-friendly I think we should leave it there! 2 2 Link to comment Share on other sites More sharing options...
Col. Posted October 9, 2022 Share Posted October 9, 2022 10 hours ago, zebra said: In this case a very odd looking girl with 3 exhaust nozzles. And in the interests of keeping this thread family-friendly I think we should leave it there! Ahem, yes, moving swiftly on... Tidy work on the test engine pods Julian How long did they take to print out? 1 Link to comment Share on other sites More sharing options...
zebra Posted October 9, 2022 Author Share Posted October 9, 2022 1 hour ago, Col. said: Ahem, yes, moving swiftly on... Tidy work on the test engine pods Julian How long did they take to print out? Thanks Col. I think it was about 4 hours - just left it going overnight. 1 Link to comment Share on other sites More sharing options...
modelling minion Posted October 13, 2022 Share Posted October 13, 2022 This is a great choice Julian and not one I was aware of before. You have done a great job on the extra engines, really nice work. 🇺🇦 1 Link to comment Share on other sites More sharing options...
Shorty84 Posted October 14, 2022 Share Posted October 14, 2022 Cool, never knew such a configuration existed. Did you have scale plans to design the test engines or was it done just using photos? Cheers Markus 1 Link to comment Share on other sites More sharing options...
zebra Posted October 15, 2022 Author Share Posted October 15, 2022 14 hours ago, Shorty84 said: Cool, never knew such a configuration existed. Did you have scale plans to design the test engines or was it done just using photos? Cheers Markus I found some reports from the NASA test programme online which had some drawings in them - not scale drawings as such, but enough information to get the basic dimensions and layout, plus a few measurements taken from photos. 2 1 Link to comment Share on other sites More sharing options...
zebra Posted December 3, 2022 Author Share Posted December 3, 2022 Time to get a shift on with this one. Cockpit and Wolfpack resin jetpipe done: more soon Julian 13 Link to comment Share on other sites More sharing options...
zebra Posted December 4, 2022 Author Share Posted December 4, 2022 Fuselage assembled. All pretty straightforward so far, everything fits quite nicely. Then on to the wings and time for the first modification: The elevons were split with the segment above the test engine on each side fixed, and smaller moving elevons inboard and outboard of the fixed bit. Rather than just filling the hinge line of the fixed bit and scribing a couple of lines, it seems to me that the best way of showing this off will be to droop the elevons. So out with the razor saw and the first wing is cut up: I ran out of time to do the second one today, but will get it done soon. cheers Julian 12 Link to comment Share on other sites More sharing options...
Col. Posted December 4, 2022 Share Posted December 4, 2022 I was so busy being impressed by your scratch-made engines I'd not realised you'd not started the actual kit Julian but you're certainly making great progress with it now 1 Link to comment Share on other sites More sharing options...
modelling minion Posted December 4, 2022 Share Posted December 4, 2022 Great to see this one moving forward again Julian, very nice work too. 🇺🇦 1 Link to comment Share on other sites More sharing options...
zebra Posted December 18, 2022 Author Share Posted December 18, 2022 Wings on, canopy on, nose on. I've also reattached the flaps. The wing was a very tight fit - so much so that I cracked open the seam on top of the fuselage trying to get it in. Easily fixed though. Just a bit of cleaning up, then masking and painting time. There are a few custom decals I need to do so I'd better get on with that too. cheers Julian 12 Link to comment Share on other sites More sharing options...
modelling minion Posted December 20, 2022 Share Posted December 20, 2022 Very nice work Julian, she's really taking shape now. 🇺🇦 1 Link to comment Share on other sites More sharing options...
zebra Posted December 22, 2022 Author Share Posted December 22, 2022 ADC grey done. I used AK Real Colour for this - went on very nicely and gave me a nice smooth finish. I'll be on to the decals in no time. cheers Julian 12 Link to comment Share on other sites More sharing options...
Col. Posted December 22, 2022 Share Posted December 22, 2022 Good progress on this one Julian. 1 Link to comment Share on other sites More sharing options...
modelling minion Posted December 22, 2022 Share Posted December 22, 2022 Nice smooth coat of paint Julian.👍 🇺🇦 1 Link to comment Share on other sites More sharing options...
Corsairfoxfouruncle Posted December 22, 2022 Share Posted December 22, 2022 Agreed its a very good primer coat. I really need a B in my collection. 1 Link to comment Share on other sites More sharing options...
Mike N Posted December 22, 2022 Share Posted December 22, 2022 Just catching up with this one, Julian, and liking what you're doing On 10/8/2022 at 11:27 AM, zebra said: I was given a very interesting book for Xmas last year - Testbeds, Motherships and Parasites by Frederick Johnsen. It's page after page of modelling inspiration! I have this book too, and I agree it is full of fascinating projects begging to be modelled! Mike 2 Link to comment Share on other sites More sharing options...
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