Today's Message Index:
----------------------
 
     1. 09:06 AM - Re: C of G range (viperpilot)
     2. 11:16 AM - Re: Re: C of G range (Vern Little)
 
 
 

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Time: 
09:06:14 AM PST US
Subject: 
Re: C of G range
From: 
"viperpilot" <nsage86@comcast.net>
      
      
      The latest information I have is a CG range of 86.7 inches to 97.4 inches aft of
      the "Datum".  The "Datum" is 80.0 inches forward of the wing leading edge. 
      Source of the information is John Harmon at harmonrocket@aol.com .  Hope that
      helps.  Feel free to email me at viperplt@comcast.net if you have any further
      questions.
      
      Tailwinds,
      Randy Sage
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=403207#403207
      
      

Message 2


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Time: 
11:16:07 AM PST US
From: 
"Vern Little" <sprocket@vx-aviation.com>
Subject: 
Re: C of G range
      
      
      Hi Randy, thanks for this.
      My research has shown that the RV-4 wing uses 15-30 percent MAC which is 
      88.7 to 97.4 inches aft of datum.
      I've seen the 86.7 and 87.7 forward limit in some F1 cases (larger tail), 
      but this is quite an outlier.  Virtually all loading cases can fit within 
      the 88.7 limit (155 lb pilot, zero fuel is at the limit in my case).  Note 
      that fuel moment arm is AFT of the forward limit, so the C of G moves 
      forward as fuel is burned in this scenario!
      
      The only traceable engineering source is the RV-4 manual and I'm happy with 
      the choice off 88.7 for the forward limit.  Everyone agrees on the aft 
      limit!
      
      Thanks again for the feedback,
      Vern
      
      -----Original Message----- 
      From: viperpilot
      Sent: Sunday, June 23, 2013 9:05 AM
      Subject: Rocket-List: Re: C of G range
      
      
      The latest information I have is a CG range of 86.7 inches to 97.4 inches 
      aft of the "Datum".  The "Datum" is 80.0 inches forward of the wing leading 
      edge.  Source of the information is John Harmon at harmonrocket@aol.com . 
      Hope that helps.  Feel free to email me at viperplt@comcast.net if you have 
      any further questions.
      
      Tailwinds,
      Randy Sage
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=403207#403207
      
      
      -----
      No virus found in this message.
      Checked by AVG - www.avg.com
      
      








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