Mailing List flyrotary@lancaironline.net Message #65174
From: Andrew Martin andrew@martinag.com.au <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Water spray cooling question
Date: Sat, 7 Sep 2019 18:25:29 +0800
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Steve. 
The guru at my Ruffasguts Engineering Company would say to just try a windscreen washer bottle with inbuilt pump and a garden sprayer mist nozzle on the end of the hose and see how that goes.
Technical enough for ya😁

On Sat, 7 Sep. 2019, 5:57 pm Stephen Izett stephen.izett@gmail.com, <flyrotary@lancaironline.net> wrote:
Hi Guys

I’m wanting to understand how much water is required to to be atomised into the coolant diffuser to lower the mass of air by say 10C.
I’m interested in this for the couples of minutes of high energy input into the coolant and oil while the airspeed is low on taxi/takeoff.

Is there anyone clear at their fingertips the physics/eng calculation required?

I expect it must involve energy required to vaporise water - 540 cal/gram
OAT, Humidity, mass of air/min.

Thanks.

Steve Izett
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