Mailing List lml@lancaironline.net Message #45837
From: Bill & Sue <5zq@cox.net>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] To air filter or NOT to air filter - THAT is the question.
Date: Tue, 15 Jan 2008 16:38:01 -0500
To: <lml@lancaironline.net>
Hi Matt,
 
Somewhat surprisingly, the bird has a fairly good chance of making it through the prop unscathed. Here's why:
 
Assuming 2400 rpm and 200 mph (17,600 feet/min), the airplane moves forward 7.33 feet per engine revolution . With a 2 blade prop, the airplane moves 3.66 ft per blade passage. If a bird has a length of 1 foot, then he has a better than 66% chance of making it through!  A 3 or 4 blade prop would reduce his chances somewhat.
 
Of course, his elation at making it all the way through a spinning propeller would be fairly short lived if he was heading for the cowling or windshield.  
 
Bill Harrelson
N5ZQ 320 1,450 hrs
N6ZQ  IV under construction
 
 
 If I did have a filter, It might stop a bird but at 200 mph, that is doubtful but then again the prop might make the best air filter of all.
 
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