Mailing List flyrotary@lancaironline.net Message #12648
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: EWP
Date: Sat, 6 Nov 2004 23:05:27 -0600
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
maybe I missed it, but for what reason would you want to run electric waterpumps?
 
- no cavitation at high rpm
- better cooling at low rpm (holding for takeoff, etc)
- more power available for the prop, particularly at higher rpm's (remains to be proven how much more)
- reliability (broken and throw belts are the only thing that's EVER stranded me in a car, happened twice)
- easier, more flexible installation
- redundancy (ever seen two mechanical pumps)
- other advantages I'm too tired to think of at the moment.
 
For the record, I'm pretty happy with my series mechanical and EWP setup.  It's sort of like having the best of both worlds.  The only reason I'll go full EWP is if I can prove that there's significant performance to be gained.  Frankly, I'll be surprised if I can tell any RPM difference between mechanical, and EWP runs.  
 
Cheers,
Rusty
 
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