Mailing List flyrotary@lancaironline.net Message #12692
From: Al Gietzen <ALVentures@cox.net>
Subject: RE: [FlyRotary] Re: EWP Info
Date: Mon, 8 Nov 2004 07:58:04 -0800
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message

Subject: [FlyRotary] Re: EWP Info

 

That should give you enough flow to run safely to about 25-30 hp.

 

Al 

 

Let's see, I'm pulling 3.6 amps, and Todd is pulling 4.3 amps.  What does your calculator say he can safely cool?  Maybe 35 hp ???   Hmmm, I sure thought his turbo engine would be putting out more power than that :-)

 

I'll run a ground test next weekend, and will have a pretty good idea of how it compares to the mechanical pump.  I'm absolutely confident that I can cool far more than 30 hp, and if you could hear the flow of water through the engine when the EWP is on, you'd throw that calculator in the trash :-)    

 

Cheers,

Rusty (undaunted by disbelievers) 

 

Rusty;

 

That’s going to be little tough; I did the calculation in my headJ.

I’m not saying you can’t run to higher power – in fact, I’m sure you can.  The key word is “safely”, and maybe one should add “long-term”.  Unless you are measuring some internal temps, how do you know when you start getting boiling around the plugs, or high thermal stresses in other areas?

 

Just something to consider.  When you do your runs, I’d suggest monitoring inlet and outlet temps. If they get to be more than 40-50 F different, I wouldn’t bother going any further.  Why risk it?

 

Al (question everything; go ahead, prove me wrong)

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