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BS_w

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  1. doubler plate formation light on D, E, E-1, F...H87-A3
  2. Seen on catalog part F6F-3 anchor light and reco light are white section light is blue
  3. finishes of P 40 F & L : "Exterior surfaces: ... (d) The area exposed by opening landing gear flaps shall be finished with one coat of primer and one coat of yellow-green finish." the "yellow-green finish" and "cockpit-green" are same.
  4. 135 badin is IAS as claudio wrote, the real speed depending the anemometer, mph, kt or km/h for D520 it's km/h for take off, the original manual wrote: set the trim at "0", this index = the stabilizer at +2° 55' (full nose heavy +6°10' and tail heavy +0°25)'
  5. about D520 cockpit early aurplane has cockpit painted in "gris bleu" wreckages N° 2, the part (4) is a sliding frame of hood(interior surface) from dec 1939, the color "bleu de nuit" was specified for cockpit interior stiffener of N° 251 Instrument panel D 520, the erection maintenance manual 1940 : one coat chanmois primer then two coat "bleu de nuit" (Dewoitine not follow the AA spe...)
  6. I wrote it about another D 520 (Littolf's D520) which is often described completely painted in "buff" color. It was possible that this "buff" primer on the duralumin skin was overcoated by another finish paint because the "chamois" was a primer and could'nt be applied as finish coat for exterior surfaces. (according the specification of AA, the airplanes used for lisison were "aluminium color"
  7. this info is in "Ailes 3, march 2022" and it update the old docavia. There is a need for a new book on the D520 to replace the docavia, LP & PhR are working on it
  8. I found Tr 1133 and IFF R 3002 on Mk I & II, may be similar on IV?
  9. IFF set, R 3002 with cheese cutter or R 3067 with 14" mast under stb wing? R 1143 on which model?
  10. In the "Curtiss finish specifications S-517 - all export airplane -1939" and "S-615 - P36 and P40 airplanes", in the EMM P-40F , Curtiss gave the following formula for interior finish paint called "cockpit-green" or "yellow-green finish" · zinc chromate primer 1.0 gallon · enamel, black 0.1 gallon · aluminium paste grain 320 4.0 ounces · toluol 2.0 gallons In the EMM of P-40N, the aluminium paste was removed and it was tinted to match "interior green ANA 601"
  11. as the note 14 " Medium Green Camouflage fringe to be used on Olive drab camouflage airplanes but not on desert camouflage airplanes", was added 17th march 43 on Curtiss drawing and TO 07-1-1 of jun 43: "the basic camouflage scheme in permanent camouflage materials fo Army Air Forces aircraft is dark olive drab, shade No. 41, for surfaces viewed from above and extending down on sides of fuselage; medimum green, shade No. 42, in irregular splotches along all edges on the upper side of the wing and the horizontal soutline of the tail assembly; alos, along all edges of both sides of the vertical outline of the tail assembly, extending inward from the edges for varipus distances up to 20 percent of the total width ot the wing or the tail assembly.... Masking will not be employed to separate ANY COLORS. Junction lines will be blended by overspraying." but it was written at the next paragraph: SPECIAL.-- Use of one coat of following special permamnt finishes over materials of like type is authorized as required to conform to existing local terrain. (a) Medium green, shade No. 42, on upper wing and fuselage surfaces for aircraft operating over terrain predominately green." is it reasonnable to think that may be the early airplanes N produced before these date which were delivered in old standard US army camo 41/43, without 42 fringe? and later certain others entirely MG 42 on upper surfaces? and a majority in standard 41/42/43?
  12. remember the nota (1): il peut arriver que des dérogations soient apportées à ces prescriptions pour les coques et flotteurs métallique ou bordée en bois. Des études sont en cours au sujet de la protection des éléments des hydravions de croisière. this nota is written in 1st(dec 35) and 2nd(dec 36) edition of AIR 2003 So the underside could be other than "gris bleu clair"
  13. @VT Red Sox Fan, the normal exhaust shroud was a part which seals the space between the engine and the cowl to reduce drag. Air flow could'nt enter in engine compartment. For winterized shroud; a plate was added to close the shroud except at the forward. At the rear an outlet to connect a boa hose. The air flow enter in front, reheat around the stacks exhaust then escape to the carburetor. On the drawings, at mid we can see the fitting for the hose at the rear, at bottom, the plate which close the shroud. This plate, in .020 stainless steel was under the cowling. the side views is seen on the centerline of exhaust, not horizontally. On Aleutian's P40, it seems that the design of inlet was longer and semi cylindrical.
  14. Found this note(jun 42) on original paint scheme Curtiss technical drawing", may be the case of some Aleutian K & K-1? I understood that camo was OD/NG, without MG fringes(added jan 43), and brown(earth) areas over OD according the british scheme
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