Author Topic: Brewster Buffalo Ideas and Inspiration  (Read 1056 times)

Offline jcf

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Re: Brewster Buffalo Ideas and Inspiration
« Reply #25 on: January 01, 2021, 01:52:16 AM »
Would it give any advantages though?

Performance at altitude, very important when countering Red Skull’s Zeppelins.
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Re: Brewster Buffalo Ideas and Inspiration
« Reply #26 on: January 01, 2021, 02:03:26 AM »
Oh I realise that and indeed suggested somewhat similar back in Reply # 4.  I was referring more to the R1820 vs R1830 change.
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Re: Brewster Buffalo Ideas and Inspiration
« Reply #27 on: January 01, 2021, 02:11:07 AM »
Ski equipped version:

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Re: Brewster Buffalo Ideas and Inspiration
« Reply #28 on: January 01, 2021, 02:30:29 AM »
A subtle whiff might be to have an Ilmavoimat one fitted with a Bramo 323 instead of the R1820.  Would be no increase in performance but still...
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Offline jcf

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Re: Brewster Buffalo Ideas and Inspiration
« Reply #29 on: January 02, 2021, 08:44:44 AM »
Oh I realise that and indeed suggested somewhat similar back in Reply # 4.  I was referring more to the R1820 vs R1830 change.

The length difference between the two types is primarily forward of the mounting flange,
and over half of it is the deeper reduction gear housing on the R-1830. The accessory
sections on the rear of the engines aren’t too much different in length and those bits can
be rearranged as necessary.

Realistically the cowling length would only increase by an amount equivalent to the added
cylinder bank. The cowlings of the Cyclone/R-1820 engined DC-3 vs. those of the Pratt &
Whitney Twin-Wasp/R-1830 powered DC-3A is a good guide to the changes.

Ditto the R-1830 vs. R-1820 powered versions of Curtiss P-36/H-75.
 
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Re: Brewster Buffalo Ideas and Inspiration
« Reply #30 on: January 03, 2021, 01:18:04 AM »
I don't see what advantage a R-1830 powered Buffalo would have over a R-1820 powered version unless one was after commonality with other platforms perhaps.  Looking briefly at them, you see the following:

Wright R-1820-40
from typical F2A-3

Length: 47.76 in (1,213 mm)
Diameter: 54.25 in (1,378 mm)
Dry weight: 1,184 lb (537 kg)
Power:  1,200 hp (890 kW)
Pratt & Whitney R-1830-76
from Grumman F4F-3 as approximate equivalent

Length: 59.06 in (1,500 mm)
Diameter: 48.03 in (1,220 mm)
Dry weight: 1,250 lb (567 kg)
Power: 1,200 hp (890 kW)
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