Augmented cooling radiators

[KHambsch]

Beguines ducts were partially made of molded plywood. It could've been a ramjet with a new center section.

What? Where did you find that? Plz post a link.
No one is questioning that the oil and glycol cooling was moved from the belly to the wing tips. But, plywood? Link please... I don't mind being a monkey. K

 

[KHambsch]

Yes, hoping for Meredith effect...wish there were better pictures

 

[sienar]

A few sources say so, most notably a contemporary issue of Automotive Engineering

The intake is a wood color in several photos

 

[Scott Kenny]

Thanks all for those comments. I'd just note that what I mean by "augmentation" is some kind of additional energy input. Simple aerodynamic shaping to channel the airflow is not really augmentation, but a useful addition to the discussion nonetheless.

Air racers use a methanol-water spray across their radiators to increase heat transfer, which should also provide some additional thrust due to the additional mass being accelerated out the back of the Meredith duct. (I'd need to know mass flow rates and exhaust velocity to tell you how much)

It could have been troublesome to cool the aircraft on the ground, without the slipstream of the prop...

That basically only matters on landing. With all the coolant that needs to warm up, you've probably got 10 minutes on the ground after cold start before you're going to see heat problems. Land, taxi off the runway, shut down ASAP. Getting towed back to your spot in the pits is acceptable under the rules.