Mailing List flyrotary@lancaironline.net Message #3757
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: EWP - series pumps and wacky ideas
Date: Sun, 12 Oct 2003 11:28:06 -0500
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message I do the same thing Rusty, I just run both fuel pumps all the time. If you run one pump and it fails, the engine will stop running  immediately. If you run an EWP and it fails, your engine won't quit immediately, so you would have a little time to switch over to the other EWP.
Perry Mick
http://www.ductedfan.com 
Hi Perry.  If your water pump dies, the engine won't quit immediately, but you will need to get that second pump on right away.  To do that, you would almost have to have a flow meter that goes into alarm below a certain amount of flow, and better yet, kicks on the backup pump automatically.   
 
Can anyone estimate how long the engine would run at cruise power, with no water flow, before you boil away lots of coolant, and warp the housings?  I'm afraid it wouldn't be more than a minute or so.  
 
Cheers,
Rusty (I'm NOT going to experiment with no-flow conditions <g>)  
 

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