CW-21: how much can it be improved?

[Shortround6]

What about the R-2000

The R-2000 was a transport engine. By the time it showed up P & W was pushing the R-2800 as a combat engine.

The R-2000 pretty much offered what you would expect from it. Around 9-10% more power at similar heights compared to the R-1830 except is was skewed a bit to low altitude work.
The early R-2000s offered 1350hp for take-off, latter ones offered 1450hp for take-off. Very late (1944) R-1830s offered 1350hp (needed new cylinders).
An R-2000 could offer 1000hp max continuous at 14,000ft in high gear while an R-1830 offered 1000hp max continuous at 12,500ft. There were a number of versions.
P & W never did more than put a two speed supercharger on it and a lot of the engines used a single speed supercharger, Since just about all of them went into DC-4s/C-54s and variations with different designations (marines had their own designations) and since the airframe was not pressurized a lot of them never flew high enough to use the 2nd speed.

Some things trickled down from the R-2800.

 

[FLYBOYJ]

The light frame is a valid concern considering the trouble they had with the P-36 and how much they strengthened things for the P-40.

I'll have to see if I can find that issue. Thanks

 

[wlewisiii]

In my cart. Hopefully it'll still be there on payday

 

[Shortround6]

I believe the Dutch had trouble with some of their CW-21s. ?

The CW-19 through 22 is rather interesting. The CW-21 and CW-21B were both evaluated at Wright Field, the CW-21 in Nov 1938 and the CW-21B between April 12 and 24th 1940 and was flown by six Army officers.

 

[FLYBOYJ]

I believe the Dutch had trouble with some of their CW-21s. ?

The CW-19 through 22 is rather interesting. The CW-21 and CW-21B were both evaluated at Wright Field, the CW-21 in Nov 1938 and the CW-21B between April 12 and 24th 1940 and was flown by six Army officers.

They did - issues with the guns (which IIRC were worked out) and with the radios. There were also structural issues that arose as the aircraft were flown operationally

 

[Shortround6]

This has about 8 pages on the CW-21 and CW-22. Some which contradicts some of what the common history says. Mostly that the different planes were all developed at the same time and not sequentially.

 

[GregP]

There is a beautiful CW-22 at the Evergreen Aviation and Space Museum in McMinville, Oregon. If makes you want to drag it out and go fly.

 

[NVSMITH]

-The last time I was at the Naval Air Museum in Pensacola there was a SNC hanging from the ceiling.

 

[FLYBOYJ]

View attachment 691614

This has about 8 pages on the CW-21 and CW-22. Some which contradicts some of what the common history says. Mostly that the different planes were all developed at the same time and not sequentially.

IIRC I think that was mentioned in the Air Enthusiast article