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Rob de Bie

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  1. Here's my 22 year old home-built spray booth. I had a blower from a kitchen furnace, and I wanted a storage area for the flexible hose. The booth consists of three main parts: a rectangular air box in which the blower is located, a small storage box for the exhaust hose on the right side, and a working desk with curved walls to the front. I built the booth from 10 mm MDF. Initially it was mounted on a wall-mounted TV stand, that explains the step in the bottom at the rear. The booth has gained a good patina of all kinds of paints. A new filter is fitted, which explains why it looks so clean. On the right you can see the flexible air hose exiting; on the left you can see it running upwards towards the exhaust above the window. The detail photo shows the radial fan. The booth has four rubber feet, so I can move it around easily. I have plans to build a new, more powerful spray booth. When I'm blasting away with (for example) the Paasche H, the spray booth cannot keep up. Also, the flow pattern at the filter face is awkward, in some areas the flow appears to be reversed. This is most likely due to vortices, that are caused by the bad aerodynamic layout of the blower sucking through a hole in a flate plate. My ex-kitchen hood blower is around 75 Watts power, but I have a 150 Watt blower waiting to be converted into a paint booth. It will also have a better aerodynamic shape. Rob
  2. I just found a 'retro SF' 3D model that I really like: the Jules Verne moon rocket, as found on the covers of several books. The model shown is probably unpainted, but here's a more colourful example: Here's the link to the 3D model: https://www.printables.com/model/279902-de-la-terre-a-la-lune-jules-verne Rob
  3. Michael, thanks one more time for your research and kind help! According to Yefim Gordon's Aerofax book, the Yak-28B and 28U had the R11-AF300 engine - from memory the A signifies that the engine accessories were placed differently, because of the installation in an engine pod instead of a fuselage. Therefore I think (but have no solid proof) that the nozzles of the Yak-28B and U also looked like the wreck parts. Therefore the list of possible aircraft with this nozzle contain four types: MiG-21F, early MiG-21F-13. Yak-28B and Yak-28U. Rob
  4. Michael, we will wait patiently for you to sort out the last remaining question. Thanks again for all your help in this thread. Rob
  5. Duncan, I share your amazement at how clean the parts are. The corrosion part can (probably) be explained by the special metals and coatings required for the afterburner section. But moss grows everywhere I would think. Puzzling.. Rob
  6. Giampiero, it was found at Templin / Gross Dolln, see this Youtube video: https://www.youtube.com/watch?v=aZaHqPtVw3s&ab_channel=MarcoJust(eigeneDokus) Rob
  7. What still confuses me it that roughly half of preserved MiG-21Fs have the nozzle like the wreck pieces, and the other half has a different nozzle. I made an overview of all photos I could find: 'Boxy petals' nozzle (like the wreck parts) MiG-21F-13 '007' Israeli Air Force Museum http://data3.primeportal.net/hangar/isaac_gershman/mig-21f-13/images/mig-21f-13_12_of_78.jpg from http://www.primeportal.net/hangar/isaac_gershman/mig-21f-13/ MiG-21F-13 '63' NASM Udvar-Hazy 2015 https://447bg.org/museum/wp-content/gallery/mig-21-fishbed-udvar-hazy-2015-10-23/Mig-21-Fishbed-Udvar-Hazy-2015-10-23-2887.jpg from https://447bg.org/air-modern/modern-russian/mig21-fishbed/ MiG-21F-13 'MG-78' at Karhulan ilmailukerho Aviation museum https://upload.wikimedia.org/wikipedia/commons/1/1d/MiG-21F-13_(MG-78)_Karhulan_ilmailukerhon_lentomuseo_09.JPG from https://commons.wikimedia.org/wiki/File:MiG-21F-13_(MG-78)_Karhulan_ilmailukerhon_lentomuseo_09.JPG 'Flat petals with filler plates' nozzle MiG-21F '1112' Palm Springs Air Museum 2018 https://447bg.org/museum/wp-content/gallery/mig-21-palm-springs-2018-04-12/MiG-21-Palm-Springs-2018-04-12-8199.jpg from https://447bg.org/air-modern/modern-russian/mig21-fishbed/ MiG-21 F-13 '0514' Aviation Museum Kunovice 2021 https://youtu.be/uMXFAjZRXzg&t=206 cutaway engine http://www.leteckemotory.cz/motory/r-11/r-11f-300_vystup.jpg from http://www.leteckemotory.cz/motory/r-11/ One explanation could be that we're looking at the R11F-300 and the R11F2-300, but I cannot find anything solid about the differences. This website https://www.mig-21.de/english/technicaldataengines.htm reports: R11F-300 (37F) in MiG-21F, F-13, U R11F2-300 (37F2) in MiG-21F-13 (refitted), PF, FL Does anyone know which is which? Rob
  8. Michael, you predicted the outcome 100% correct!! 40 hours non-stop on a tractor towing a MiG - my hat is off for your job dedication.. Rob
  9. Bingo!! Many thanks JagRigger! Rob
  10. I'm pretty sure that the old Italeri B-57 was copied for the fuselage. But that kit has a problem with the rear fuselage, so it added another problem. What I found most irritating on the Mach 2 kit is that the wing roots are different left and right - they are at different heights when viewed from the front. The right wing root matches the left wing root at the leading and trailing edges, but it is 1 mm higher at the wing's thickest point. This is matched by the wing itself, of which the right top side is about 1 mm thicker than the left top side. Also, the wings are very fat over the last third of the chord, it looks strange. NACA 64 series is all that the Aerophile article mentions. Rob
  11. It seems I was too quick with my conclusions.. I based my conclusion on the petals in the lower circle, thinking they were 'one piece', wide petals. But after doing a 'levels' (gamma correction) of the photo, I saw in the upper circle that there are extra petals to 'fill the gaps'. And now that I know that, I sort of see them too at the bottom. Therefore my conclusion was wrong. I looked for more Tu-22 nozzle photos, and found the grand total of two. Two different nozzles, but I could not find what versions of the RD-7 / VD-7 they are. The first one (from https://www.airplane-pictures.net/photo/1338587/07-ukraine-air-force-tupolev-tu-22-blinder-all-models/), zoomed in, shows the same nozzle as above I believe, and therefore it's not the same as the wreck photos. Here's one from Wikipedia (https://en.m.wikipedia.org/wiki/File:Tupolev_Tu-22PD,_Russia_-_Air_Force_AN1844217.jpg), zoomed in. The petals have an I-shaped stiffener, not a box-shaped. And the exterior contour is totally different. Zero points.. Back to square one it seems.. Help? Rob
  12. Michael, another big thanks for all your efforts! I *may* have cracked the puzzle myself, when I bumped into this page: http://авиару.рф/aviamuseum/dvigateli-i-vooruzhenie/aviamotorostroenie/aviamotory-sssr/turboreaktivnye/turboreaktivnyj-aviatsionnyj-dvigatel-rd-7/ The first photo on that page shows nozzle petals that slide into each other, without extra different petals to 'fill the gaps' so to speak. You can't see much else, but this is the first nozzle that can't be excluded, I think. So it's likely a Dobrynin VD-7 / RD-7, and that crash was likely of a Tu-22 Blinder. Wow! Rob
  13. Thanks Tony! I found an auction on Ebay that shows a bit of the the contents: http:// https://www.ebay.co.uk/itm/166886200061 Ebay suggested a few more books that look interesting. Again I searched for auctions that show a bit of the contents: 'Spacecraft 2000 to 2100 AD': https://www.ebay.co.uk/itm/356403265381 'How to Build Sci-Fi Model Spacecraft': https://www.ebay.co.uk/itm/335532304765 Rob
  14. Thanks for checking! That brings me to the idea that I need to check my collection of FSM issues for inspiration regarding 'retro' SF models.. Rob
  15. Noel, thanks for the tip! Indeed it was a 'Scale Models' special, and what a great cover. Here's a nice peek ito the special: https://www.youtube.com/watch?v=1Vdsurd0FgA&ab_channel=MrEModels It seems there's another book(let) with the same name, by Fine Scale Modeler 🙂 Rob
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