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Kari Lumppio

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About Kari Lumppio

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  1. Building a MIG-21PF - using a Zvezda or RV as a base? (Renamed)

    Hello! I wrote "Undeneath one can find a fuselage similiar to the ealier F types". This meant and means the spine tank is add-on to fuselage (shape and geometry) similar - but not the same - as MiG-21F. Please do not misunderstand me. Yes, there is equipment bay behind the cockpit and forward of the fin, too. And the spine tank is between them. Finnish MiG-21 BIS had several pushrods with part number beginning 66 (or even E-66? It was 29 years ago). I think E-66 is the oldest version of the MiG-21? I would not be surprised if some mid-fuselage frames remained the same, too. Perhaps relocated, likely not. What I would like to know (and was asking) is if their intakes were optimized for different angle of attack. Nose tilt 3 degrees down for BIS. For me there is something different in the MF and BIS intakes and I would like to put finger on it. Cheers, Kari
  2. Building a MIG-21PF - using a Zvezda or RV as a base? (Renamed)

    Hello! This is not an answer to the original topic. Just wanted to say something about MiG-21 BIS (produkt 75b) shape compared to MF and such. MiG-21 BIS has forward fuselage centerline tilted down 3 degrees from rear fuselage & engine centerline. That is why BIS fuselage lower edge line is practically straight from nose wheel well to the fuselage joint line behind wing trailing edge and somewhat behind, even. Any model trying to be BIS should show this attribute. Also BIS intake lip outside is curved (to minimize pressure losses in the attached sonic vawe? Graham Boak might know more?) while MF PF, PFM etc have it sharper. Their fuselage lower line also seems to beging to curve upwards to the nose much earlier, somewhere near the cockpit rear wall. Intake diameter is indeed different, but that may be because of the radar size, too. BIS spine is one huge fuel tank (number seven). Undeneath one can find a fuselage similiar to the ealier F types. Rudder puhsrods go on the spine, too. If someone has MiG-21 MF manual I would like to know if it gives tilt angle for the forward fuselage and does it differ from BIS. Cheers, ┬ĘKari
  3. Spit VII cockpit photographs?

    Hello! Not Mk VII, but here is Mk VI seen in German eyes: Photo links seem still to work. Perhaps of some use, Kari
  4. MIG-21UM forward airbrake .. a further question

    Hello! For whatever it is worth. Not sure about UM, but at least with MiG-21 BIS (produkt 75B) you had to pull a T-handle and then pry the forward speedbrake open for service. If the speedbrake hangs out wihtout the said process it is broken. Not saying that you should not model the brake open. Cheers, Kari
  5. PE-2 interior colours

    Hi! Related to Troy's post #5. https://photos.app.goo.gl/DN9JedaH74DRJznV2 https://photos.app.goo.gl/vceViintRoqpf70q1 Have to go to sleep, Kari
  6. Modelling 1/72 later P-40 / Kittyhawks

    Hello! I have some P-40 modelling questions: 1. Hasegawa 1/72 P-40N does not have the smaller wheels. Is there aftermarket ones which have correct diameter in addition to detail? Or kit parts. 2. Did RAF/RAAF Kittyhawk Mk.IV have four or six machine guns in wings? 3. Did RAF/RAAF Kittyhawk Mk II (P-40L?) have four or six machine guns in wings? 4. Where can one get correct wider blade propeller for P-40M n 1/72? Afermarket or has some kit it already? 5. Did Kittyhawk IV (P-40N) have also the wider blade propeller? 6. Wheel well canvas liners. Yes or no for Kittyhawks Mk.II to IV? Questions inspired by a recent decal purchase. Thanks in advance, Kari
  7. NA-73 Mustang I, best options in 1/72nd

    my mistake in the heat of a moment. 352nd FG Mustangs. At least two different blues used? My recollection.
  8. Humbrol number for Dutch colour "Fokker khaki" ?

    Hello! See if there is something You can use in this old thread: Especially post #8 has some relevant data. Cheers, Kari
  9. Glass panels in lower fuselage on Grumman Wildcats?

    Hello! In the Finnish Brewster (F2A-1 / model 239) equipment list they were "bombing windows". I believe bomb aiming windows for level bombing. Cheers, Karn
  10. Interesting Hurricane Paint Job

    Hello! Shell 100 is so called straight oil and the instruction text may be indication of a recent motor change and resulting break-in period. Shell 100 oil Technical Data Sheet: http://www.google.fi/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwitloOhmq3YAhXBQZoKHS3rArUQFggtMAE&url=http%3A%2F%2Fwww.multiforceegypt.com%2Fmedia%2F76c200c0-4fd8-44e9-a383-93c7ee517c82%2F1559951856%2FPiston%2FGPCDOC_GTDS_AeroShell_Oil_100_(en)_TDS_v1.pdf&usg=AOvVaw1sgnG5iTsHingmeTOxSp9o Note Shell W120 oil is recommended for warmer climates (see: http://www.aircraftspruce.com/catalog/eppages/aeroshelloils.php ) Back when I was maintaining a local aeroclub plane AeroShell W100 oil was used in the new (remanufactured) Lycoming O-360 during the break-in period (IIRC 50 flying hours). This tidbit had nothing to do with the spaghetti colours,but may still be of interest? Cheers, Kari
  11. IL-28 Trumpeter 1/72

    Hello! Brilliant job! I especially like the Navigator cockpit. Wish I could do such Ilmavoimat one some day. Keep on the good work! Kari
  12. Spitfire XVI RK840 of 322 Sqn RAF (Dutch) - a few questions

    Hallo! Of RV Spitfire and the Dutch 322 sqn. I remembered an article having one photo more. Wings of Fame Vol 15 (1999) has article of 322 sqn by Tieme Festner and it includes one aerial photo of four 322 sqn Spitfires. The caption is: "This formation of No. 322 Sqn Spitfire Mk XVI was captured on film by a No. 320 Sqn Mitchell, en route to France in February 1945. The lead aircraft, a late-production Mk XVI with a teardrop canopy, was flown by No, 322's CO, Sqn Ldr Bob van der Stok. Though its '3W' code is visible, it appears to lack an individual code." (emphasis mine, KLu). Edit Noticed only now the gingerbob edited reply above. If TD137 came to the unit only April 1045, the quoted caption is suspect. The part of lacking individual code still stands, though. The RV Spitfire of the mentioned photo might be TD137. Gingerbob linked above page (http://www.strijdbewijs.nl/birds/spitfire/dutch.htm) which has photo of RV Spitifire captioned "Spitfire LF Mk XVI, TD137, de persoonlijk kist van Bob van der Stok". The homesite has also list of Dutch Spitfires (edit post war only!): http://www.strijdbewijs.nl/birds/spitfire/registraties.htm. Main page: http://www.strijdbewijs.nl/birds/spitfire/home.htm. Hope this is use for some one, Kari Disclaimer: any odd language hiccup I blame on reading glasses not worn.
  13. Russian P-400 Color Scheme question

    Hallo! Of the TLS (brown/green/sky) and DFS (Dark Green/Ocean Grey/Medium Sea Grey) camo on VVS Airacobras. My understanding is that the (repainted in UK) DFS Airacobras were among the ealry deliveries to Soviet Union. And only later arrived the TLS Airacobras directly from USA (some from UK, too). This "reversed time order" may cause some confusion? And all DFS Airacobras would have been painted such in UK. Nick points out one identification feature: colour demarcaton under horizontal tail. I believe TLS Airacobras had 6 in high serial (confroming to the Bell painting instructions) while the repainted DFS Cobras had the standard RAF 8 in high serials. Photos of VVS cobras are many times so dark that no serials can be discerned. Valeri Roman has written a book(let) about the early Cobras in VVS service "Aerokobry vstupajot v boj" (Bell P-400, P39D-1, P-39D-2) ISBN 5-7707-5170-03. While the camo chapter mainly tells the US instructions and paint materials in Russian the real worth is the short chapters of each Airacobra regiment listing serials of the individual planes serving in their roster. If one has photo and knows the VVS Aircobra regiment the serials may be of help to deciding the camo. Of the silver. I think that is a possibilily. If I want to speculate (why not?), I would say the reason to use permanet silver dope is performace. For Soviets Airacobra was high end performer so why slow it down some twenty knots with chalk-glue paint? AE-8 was aluminium pigment in A-17 alkyd resin (clear) dope. IIRC AE-8 also served as primer for cellulose type paints (AMT-/AMG-). So a remote chance is the silver Airacobras were in need for repaint and were later finished in summer camo and spent the snow season wearing appropriate primer? More so if the timeframe was Winter 42-43 and the planes had served one year already. Yes that is only my own speculation and attempt to make some logic out of this. BTW Were Airacobras painted with Dupont paints? And if so were they Duco cellulose paints or Dulux alcyd paints? I believe I have asked this before, too. That might help guessing what Soviets used to repaint their Cobras. Brush painting cellulose over cellulose is at least no-no. Alkyd (like AE-8) might have acted as barrier coat? I am assuming Soviet did not remove paint in the Murmansk region conditions. May be a wrong assumption. Cheers, Kari
  14. 36 Sqn Vildebeests - Serial/Code Letter Tie-ups

    Hello! Always intterested in odd camouflages and I have to admit not even seeing the photos of Vildebeest "early camo" discussed here. But I would present an analogy from Finland. Finnish Ju W34 floatplanes were painted silver pre war years (and Winter War). When the time came to camouflage them (in 1941, it seems) they got only the green part blotches of the FinnAF standard olive green / black camo. Could the Vildebeest have been treated the same? Easier and quicker to apply and less paint needed and only one colour. You can picture google Finnish Ju W34 and see the mentioned two appearances (and couple more) if they fit the bill. Just an ignorant idea. Cheers, Kari
  15. Whats this 'aerial' on this Lancaster wings ??

    Hello! I think the antenna may have been part of "H-system". The reference I gave earlier discusses the Oboe and "H-system" in pages 14-17 of this pdf: https://www.jlab.org/ir/MITSeries/V3.PDF I may well be wrong but to me it looks like the two element beam antenna is directed outboard? The antenna type is directional and the best lobe is some +/-30 degrees. IF the RH wing tip antenna is directed outboard it really cannot be homing antenna. Lancaster would not fly very far side slipping. Also. Is there antenna also on the LH wing tip? https://photos.google.com/share/AF1QipOetRxKG2a5VNW7QMFYh6lLKSfTgCfVJXK2ewI89RUlXejLU12E6Ivewe8aKArWLg/photo/AF1QipNwWPfmqKW8hGCsL4Yezqnp5mZCn4Gw1ruQQ6G5?key=cFJJOFJuejRrcEZLd2tTQk9kUTdXbTVKWTctd3Z3 Rebecca had also 8 inches long "stub antenna" type AT-1/APN-2 (US designation). Normandy frontline 2nd July 1944 can be seen in this map: https://www.ibiblio.org/hyperwar/USA/USA-E-Breakout/maps/USA-E-Breakout-I.jpg (link works with Chrome but not with Explorer). If there was one Eureka line West-East direction and one from NW (RH wing tip antenna pointiing the direction) the crossing could be put on the German rear area like ExiledFish wrote? In other words "H-bombing". Perhaps I am out on a limb? Cheers, Kari PS "Insert image from URL" does not work for me. That's why the links.
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