Did any American medium bombers in WWII use the R-2800 rather than the R-1830?

[DaveBB]

As the title states, did any U.S. medium bombers (or heavy bombers for that matter) use the R-2800 rather than the R-1830?  If not, why not?

[Zimme83]

https://en.wikipedia.org/wiki/Pratt_%26_Whitney_R-2800_Double_Wasp#Applications

B-26 and A-26 is on the list.

[colmbo]

B-25 used the Wright R-2600.

[RODBUSTR]

 One of the main reasons most likely was availibity and cost.

[Zimme83]

B-17 had the Wright R-1870 at 1200hp each, the B-24 had the P&W R-1830, also at 1200hp each, adopting any of them to carry Engines twice as Heavy and nearly twice as powerful would be hard and neither one of them really needed it. Both planes were also designed Before the R-2800 was available.

The B-29 had the R-3350, that is roughly equal to the R-2800.

B-25 and B-26 on the other hand was Another matter, with only two Engines it is more Worth to take on the extra weight of the bigger Engines in order to get the extra Power. A B-26 had ~4400 hp while a B-17 had ~4800 hp.

[icepac]

The R-1830-65 made 1200hp at 26,500 feet as used in the B24J.

[colmbo]

The B-17 had a Wright 1820...not 1870.

As for the B-17 or B-24 not needing more power....you've never taken off heavy on a hot day have you.

While the 2800 and 3350 are both 18 cylinder twin row radials the 3350 is much more powerful than the 2800.

[Zimme83]

The B-17 had a Wright 1820...not 1870.

As for the B-17 or B-24 not needing more power....you've never taken off heavy on a hot day have you.

While the 2800 and 3350 are both 18 cylinder twin row radials the 3350 is much more powerful than the 2800.

Typo

No i havent, it is never hot here.


The B-29 had around 2200 hp/ engine, that is roughly equal to a R-2800.

[DaveBB]

The reason I asked specifically about mediums is from a book I read about B-25s in the Pacific.  It seems that the crews thought it was underpowered. Even moreso the strafer variants. It was especially hard to fly on 1 engine.  If the crew couldn't feather the prop on the dead engine (which happened a lot, because it required oil pressure), then the B-25 could not maintain level flight.  It was going down.

Of course it's hot and humid in the Pacific, lots of fuel has to be carried, etc etc.  That is one plane that could have used R-2800s.

[DaveBB]

Typo

No i havent, it is never hot here.


The B-29 had around 2200 hp/ engine, that is roughly equal to a R-2800.

I looked up both these engines, and while the R-2800 lacks about 200hp compared to the R-3350, it has a higher specific power and power to weight ratio.  The R-3350 had the unfortunate habit (which I don't believe was ever fixed) of having valves stick open and turn into mini-blow torches.  This is bad enough, but when you stick a magnesium accessory box on the back of the engine, it creates arguably the worst airframe/engine combination of WWII (He-177 is a strong contender).

But I have read reports of the R-2800 being uprated.  While they seemed to do fine in factory settings, in the field it caused lots of damage to the engine. 

[icepac]

The B-17 had a Wright 1820...not 1870.

As for the B-17 or B-24 not needing more power....you've never taken off heavy on a hot day have you.

While the 2800 and 3350 are both 18 cylinder twin row radials the 3350 is much more powerful than the 2800.

Wait a minute.........I seem to remember a video of you taking off the B24 on a hot day back on alt.games.warbirds forum.

Am I correct in assuming that the turbo's are empty shells and or that the collings b24 had a different dash engines with superchargers instead.

[colmbo]

Wait a minute.........I seem to remember a video of you taking off the B24 on a hot day back on alt.games.warbirds forum.

Am I correct in assuming that the turbo's are empty shells and or that the collings b24 had a different dash engines with superchargers instead.

Both the Wright 1820 and PW 1830 in the -17 and -24 are supercharged AND turbocharged.  I think nearly all large radials are supercharged.  The Collings B-24 still has functioning turbos, the B-17 does not.

That takeoff was at Naples and we used all of the runway.  If we'd had bombs we would have gone swimming.  Of course if we'd had 100 octane and could have used 49 inches MAP instead of just 44 we might of made it.