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Dana Bell

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About Dana Bell

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    Arlington, Virginia

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  1. Inside a Northrop Gamma 2E

    Hi Patrick, Sorry that I didn't notice your question until this morning. Northrop had an exemption on interior colors - the company used a candy apple green mixed from zinc chromate primer and aluminum powder. It was MUCH brighter than Yellow Green (which added black) or Interior Green (which also added black, but left out the aluminum powder). Hope this note isn't too late... Dana
  2. Martlet Mk.I

    Hi Bri, I hadn't noticed that particular change on the upper cowl intake before, but it makes sense. From early on the carb intake was found to be too weak, collapsing under the engine's suction. There were a number of fixes, reinforcements, and modifications - this must be one that didn't turn up in the records I reviewed! Now I'll have to go back thru the collection to see how many times I failed to notice this one! Cheers, Dana
  3. B-24 CBI-PTO variants

    Sorry, I've not been in touch with Nick for some time. I also noticed that he'd not been posting here for a few weeks, particularly on some subjects he's so well qualified to help out. Perhaps, like me, he's had/having a long vacation? I hope all is well! Cheers, Dana
  4. B-24 CBI-PTO variants

    Phil did a great job on that site, but you'll find even more on the subject in Alan Griffith's book Consolidated Mess. Alan is also working on at least one more edition covering (among other things) changes in glass-nosed Libs. Cheers, Dana
  5. FAA Corsair Mk IV fuselage carbon monoxide vents

    Hi Jon, The British system seemed to depend on a lower vent to exhaust the gasses, but the vent was wider and flatter than the American export* design. If the aircraft has the side intakes, I believe the lower vent is there - if hard to see. (Not having seen British records, I sometimes wonder if the UK had a second exhaust design.) The US design is much more easily recognized, by comparison. Cheers, Dana * The American vents for USN and Kiwi use were flush intakes exhausting through the tail wheel doors. The USN originally decided against vents, hoping instead to solve the problem by sealing the bulkheads behind the pilot - they were wrong...
  6. FAA Corsair Mk IV fuselage carbon monoxide vents

    Hi Jon, There were two versions of the CO vents. Most photos show the British-installed versions seen on the Mk.I through Mk.III. The Mk.IV had a Goodyear installed variation, seen on page 60 of Aircraft Pictorial #8 (Corsair Vol 2). The Mk.IVs were also delivered with the "short short" wing tips (page 59), rather than the short tips seen on earlier FAA Corsairs. Cheers, Dana
  7. RAF Sky- why?

    Hi Marvel, I can only guess about the RAF's use of that greenish Sky during WWII, but the earliest reported use of a pale green grey camouflage came from the Ministry of Munitions in September 1918. A multi-toned camouflage was tested on a Salamander and on a Pup: the sides and undersides were painted a "light green grey" comprising White, "Chrome," Brunswick Green, and Indian Red. The green grey also replaced the white in the upper wing insignia. Although the report mentions advantages in shadow reduction, all of the test observations were made from several thousand feet above. The advent of Sky doesn't seem to have a direct descent from the 1918 tests, but folks with a much better access to the British sources will certainly know a lot more than I. Cheers, Dana
  8. f-7 liberator, synthetic haze paint

    Hi Occa, I've seen those vertical demarcations in a number of photos, particularly on B-17s, but I've never been able to confirm where they originated. Since many of the photos show aircraft fresh from the factory, my best guess has been that it has something to do with the arrangement of work stands. In modeling, we load up the airbrush, pick up the model in the other hand, and paint away. I suspect that on the real aircraft, one team was painting the nose, while another team worked from the wing aft - any differences in the paint used by each team could have produced such demarcations. It's just a theory, but it would be fun to replicate it on a model one day... Cheers, Dana
  9. f-7 liberator, synthetic haze paint

    Adding to what Antti explained for the F-5 and Synthetic Haze Paint, from the beginning the F-7 used the same Sky Base Blue and Flight Blue lacquers, but applied the paints in the same pattern as OD and Neutral Gray. When aerial camouflage was found to be less necessary, it was stripped in the field. Cheers, Dana
  10. Hellcat questions - and maybe an answer

    HI Guys, I've never seen the term "Grumman Gray" in a contemporary document, though it's in common use in modeling circles. The color was simple the same Light Gray that had appeared on the original camouflage scheme being used up as a finish coat over the primers. That way there was no need to purchase two strocks of paint. While 36440 (Light Gull Gray) is the closest 595 color, Light Gray was darker and cooler. Cheers, Dana
  11. Serious Help Needed - 3-toned P-38's?

    Hi Ed, That photo has been reproduced in a number of places, usually mentioning the odd blue paint on the aircraft. There is no blue paint on the aircraft. The original, now in the possession of the National Air and Space Museum, was stored in a damp basement. Mold was trapped inside the envelope, and stained the emulsion. If you look closely, you can see traces of the same blue "paint" in patches on the hardstand. The only way the captioners could have known this would have been to examine the original - otherwise it looks like a blue aircraft.... Cheers, Dana
  12. Weathering Dark Blue Navy Colors

    Hi Pip, Accepting that I'm more of a color historian than color scientist, I just took the two chips into the backyard at 6:00 pm on an overcast evening. In that poor light, the post-war chip was darker, stronger, and bluer. The 1944 chip was grayer and yellower. If I'm home on a bright, sunny day this week, I'll give this a better attempt. Cheers, Dana
  13. Weathering Dark Blue Navy Colors

    Hi Pip, I've got the correspondence about the changes, the 1944 cardboard chip, and the post-war metal chip, but I don't have any technical analyses of the colors. In short, while I've got proof that it happened, I don't have Munsell values that will lead you to accurate matches. Cheers, Dana
  14. Weathering Dark Blue Navy Colors

    Glossy Sea Blue (ANA 623) actually had a poor reputation with the Navy - the wartime color faded too rapidly, losing much of the blue hue. I'd recommend adding small amounts of a medium gray, but don't go too far if you're worried about scale effect. In 1947/48 BuAer responded to the many complaints by reformulating the paint and issuing a completely new standard color chip. BTW, Intermediate Blue underwent a similar change of formula during the war, though the color chip remained the same. In the original paint, the blue pigments often faded to leave only a pale pink. Cheers, Dana
  15. Malta blue spitfires

    I can't claim to have seen Paul's SAM articles from last year, but Wasp was one of two carriers sent supplies of an experimental USN paint called Dark Blue, which was a supposed near match for Deck Blue stain. Half of Wasp's air group was supposedly painted in the new color. If the Spits matched the F4Fs, they could have all been using the new Dark Blue. That is just another possibility - and I'm not claiming that this happened with any certainty - but it's a strong "cudda-bin." Cheers, Dana
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