Pratt & Whitney R-2800s
As with most builds we start in the cockpit, after basing everything black to act as shadow if any hard to reach areas don't get the final colour with the airbrush I got to work on the engine instead. As always, I first start with the black based engine and paint it in a metallic colour (MRP Titanium this time), the push rods are painted black, then case is painted in a colour. I then give it all a black wash and slightly drybrush aluminium paint over it.
On the subject of the nose case, I don't think there is a single shade to use. Tamiya recommends a Neutral Grey, but I've seen in current day photographs and in original photographs shades from light blue, dark blue, light grey, dark grey and anything in between, even black & white photos show a lot of different tones. For these I went with intermediate blue with a touch of neutral grey.
Of note is the difference between the 1996 Corsair and the 2002 P-47, the Thunderbolt has a slightly bigger engine and a much bigger nose case, with much finer detail. Interestingly the finer detail means that the older engine takes a wash a bit better.
Wheels Up
I took one wing of the bubbletop and assembled it, interestingly there are several panels that are dropped in depending on the variant you're doing, I imagine these are more for the P-47M with it's airbrakes. Fitting the undercarriage was pretty simple here thankfully with minimal modifications required. Firstly the small door seen in the below photograph is sanded off, as this isn't a separate part we will have to make something to fill the gap but this won't be difficult. The rest of the doors fit in quite nicely though the inner door closest to the fuselage sits quite high, this should be solved with some sanding though especially as there isn't any raised detail nearby to worry about getting in the crossfire.
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Finally, here's the state of the cockpit so far. It was painted in a dark green colour different to that of the interior green we know and love, as the P-47 didn't have this. I've seen dome Bronze Green or Dark Dull Green used, I tried to get closer to the Dark Dull Green but it's not exact.
None of this particularly matters as a wash will change the end colour regardless.
Regarding the flaps, thank you for the information Stephen. I may still go ahead with the flaps down on the grounded P-47 just to provide some eye-candy/detail, but I'm not 100% sure on that yet. Thankfully the Tamiya kit does give you the option of flaps up or down with the use of separate parts which is always appreciated, if only manufacturers gave that option with the undercarriage!