Now it doesn’t seem like as
much. If you held a hose 32 feet off the ground, the water stream would
hit the ground in about a second. If it squirts out 10.5 feet over that
distance, it doesn’t seem like as big a “squirt”!
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Al Gietzen
Sent: Wednesday, May 12, 2010
12:55 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re:
alternative water pump
Al,
Are you sure of the 40
GPM? That seems like a lot. My radiator in/out is 1.25 inches, so
the water would be traveling at 628 feet per minute at that flow rate.
That is over 7 miles per hour!
Bill B
When
my 20B (with a 13B pump that Atkins referred to as ‘high flow’) was
on the dyno the measured flow was 48 gpm with the standard pulleys. I
expect the dyno cooling loop was fairly low pressure drop compared to our
typical systems, so I’m just guessing 40 gpm is in the ballpark.
628 fpm (10.5 ft/sec) would not be considered very high - - above 15 ft/sec
I’d consider high.
Al