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1/25/2018 7:38:29 AM
Posted: 3/8/2006 7:38:19 PM EST
Radial engines.
Seems like they only came in odd number of cylinders.
What is the reason and are there even number engines?
Link Posted: 3/8/2006 8:08:46 PM EST
[Last Edit: 3/8/2006 8:08:59 PM EST by twonami]
anyone?
don't make me say "hivemind"
oops, too late
Link Posted: 3/8/2006 8:16:20 PM EST
Pratt and Whitney made the R-4360 28 cyl Wasp Major, four 7 cyl radials joined together,made 3500 hp,had turbo-compounding been added would have developed over 4000 hp!
Link Posted: 3/8/2006 8:17:08 PM EST
Even numbered radial...

P&W Double Wasp
Link Posted: 3/8/2006 8:18:51 PM EST
[Last Edit: 3/8/2006 8:22:59 PM EST by benbob]
The odd number of cylinders per row keeps the vibrations down by maintaning a consistent every-other-piston firing order
Link Posted: 3/8/2006 8:30:48 PM EST

Originally Posted By Flakchak:
Even numbered radial...

P&W Double Wasp

Probably the MOST effecient airliner ever built,the DC-6,had those Pratts.
Link Posted: 3/8/2006 8:33:13 PM EST
[Last Edit: 3/8/2006 8:35:50 PM EST by twonami]

Originally Posted By Flakchak:
Even numbered radial...

P&W Double Wasp


Interesting but 2 engines stuck together don't make it a even numbered radial. "Double" Wasp
Link Posted: 3/8/2006 8:37:43 PM EST
[Last Edit: 3/8/2006 9:02:48 PM EST by WILSON]
Link Posted: 3/8/2006 8:41:45 PM EST
It had to do with the way the drive shaft worked. There were 'even' number engines, but they were multiple rows of odd-number cylinder sets that totaled up to an even number (ie, the 18 cylinder R2800 had two rows of 9 cylinders, and the R4360 (28 cylinders total) had 4 rows of 7.

http://www.aviation-history.com/engines/radial1.jpg

If there were an even number of cylinders, at some point two cylinders would be pushing directly at each other. Not good.
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