Picture of the day (general).... (12 Viewers)

[MiTasol]

And not one looks like they are Kermit Frogs descendents.

 

[Greg Boeser]

And not one looks like they are Kermit Frogs descendents.

Nobody saved pictures of the ugly ones.

 

[SaparotRob]

Yep and the aircraft the AVG were reporting could not actually exist because the Japanese were backward myopic copycats so therefore could not possibly have a fighter that could down the P-40.

I was actually hoping someone would've wrote something to the effect of: "Obviously the IJN could perform underway refueling" or "then how did they manage to strike Pearl Harbor?" My intended response would've been:
SURPRISE!

 

[Viking1066]

Second prototype FK-58 the net

 

[Viking1066]

Wartime air traffic control trainees practice on model aircraft before working with the real thing the net

 

[Viking1066]

WASP pilots assigned to Camp Davis North Carolina front of a Beechcraft AT-11 the net

 

[CATCH 22]

I think they all do!!

I agree. I already mentioned in another post that those girls (our grandmas' and sometimes great-grandmas' generation) look muuuuuuuuuch better than their counterparts today. But, as always, some of them are truly exceptional!.

 

[CATCH 22]

Wartime air traffic control trainees practice on model aircraft before working with the real thing the net
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I see B-25s and P-38s there! Amazing! They pretty much look like 1:48-ish scale.

 

[cammerjeff]

A one-off modified British experimental Hawker Tempest was used by Napier to test experimental cooling systems for its massive 24-cylinder liquid-cooled flat H-24 Napier Sabre engine with sleeve valve cylinders. It was fitted with a unique, prominent ducted spinner propeller configuration and an annular radiator.
The "cooling drag" created by the chin radiator has been claimed to comprise 13% of the total drag of the Tempest. By fitting an annular radiator this was expected to be reduced to just 4.5%. Note variations in these photos.
The annular radiator configurations showed genuine performance gains, reducing cooling drag by up to 17.5% and increasing level speeds by 11–14 mph. However, the annular radiator and ducted spinner assembly added roughly 180 lbs in weight, and the complex machinery—including internal cooling fans and sliding annular gills—required tight manufacturing tolerances that offered diminishing returns.
The concept did not fail due to a single mechanical flaw in the cooling itself, but rather because the war ended. With less need post war, the modification didn't proceed beyond the experimental stage.
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Earlier Focke-Wulf Fw-190 Prototypes V-1 and V2 featured large, low-drag ducted spinners that gave their noses a bulbous, streamlined look. However, the design severely restricted airflow and caused the air-cooled BMW 139 14-cylinder, two-row air-cooled radial engine to overheat, prompting Focke-Wulf to abandon the ducted spinner in favor of a conventional spinner and a cooling fan in the BMW 801 versions.
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Annular cooling was also tried on the Ju288 V5 with 2 liquid-cooled Jumo 222s, configured with six inline cylinder banks spaced at equal angles around the crankcase, each bank having four cylinders. The complex 24-cylinder engine was an unreliable failure, never producing hoped for output, dooming the Ju288.
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Does anyone know of other applications of this potentially promising cooling technique?

One more I had forgotten about the Renard R.37

Source Renard R.37 Belgian Fighter Aircraft - Destination's Journey