how was this inline aircraft engine cooled?

de Havilland Gipsy Twelve - Wikipedia https://en.wikipedia.org/wiki/De_Havilland_Gipsy_Twelve#General_characteristics

It was installed in streamlined housing on Albatross mail plane.

All other aircooled engines I've seen are radial with piston fins all equally and directly in the prop wash.

 

Might be hidden from view in that other pic, here's another DH Gypsy engine of the era.

 

The Gipsy King was air cooled.

 

A close up of the picture shows cooling fins.

 

When on an aircraft the air cooled cylinders are not directly in the prop wash then there's forced or guided air cooling.

See the de Havilland Albatross, note there's one cooling air intake visible on the wing outside of the outside engine.

1938 prototype​

See ---> Photobucket Drawing ---> Spare Link​

See ---> Photobucket Picture ---> Spare Link​

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Aero Manual ---> PHAK Chapter 6 ---> (7) ↓ Engine Cooling Systems​

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WW 2 Aircraft Forum ---> Air-cooled inline engines with forced cooling​

 

Too cool can be as bad as too hot

 

Nah... too cool is bad... too hot is far worse... at least for an engine...

 

Un caso de flujo de enfriamiento inverso, el del "DH Twelve" = A case of inverse cooling flow, of the "DH Twelve"

Note the air intakes in the wings on both sides of the engines in the video.







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Angelique's ability to come up with info is amazing, yet again. He is an Information Miner ! When you look at some of the planes that debuted in the mid 1930's, it is startling how far the technology had advanced in a few short decades.

 

Some more flying info, he's doing it again, 92-year-old WW2 veteran flies a Spitfire . . ​

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The Albatross had a fairly short and unspectacular career, with less than 10 built. Interestingly, it used ply and wood construction. Lessons learnt might have been used to advantage with the De Havilland Mosquito fighter/bomber, the very successful WW2 plane, that unlike most combat aircraft, was of wood construction. Some experts believe that had the resources put into lumbering heavy bombers been directed into the likes of the Mosquito, it would have overwhelmed Germany's air defences, and bombs on target figures vastly improved. Not to mention, a lot more crews surviving the experience.