---------------------------------------------------------- Rocket-List Digest Archive --- Total Messages Posted Mon 06/24/13: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:23 AM - Re: Re: C of G range (Nancy and Randy) 2. 05:10 PM - Re: Re: C of G range (Vern Little) 3. 07:10 PM - Re: Re: C of G range (Kevin DeVan) ________________________________ Message 1 _____________________________________ Time: 07:23:37 AM PST US From: "Nancy and Randy" Subject: Re: Rocket-List: Re: C of G range Vern, Glad to help. Good luck on getting her airborne. Fly Safe! Randy ----- Original Message ----- From: "Vern Little" Sent: Sunday, June 23, 2013 2:18 PM Subject: Re: Rocket-List: 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 > To: rocket-list@matronics.com > 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 > > > ________________________________ Message 2 _____________________________________ Time: 05:10:50 PM PST US From: "Vern Little" Subject: Re: Rocket-List: Re: C of G range First engine start was today, no problem except for the prop governor working in reverse (sigh). Thanks, V -----Original Message----- From: Nancy and Randy Sent: Monday, June 24, 2013 7:22 AM Subject: Re: Rocket-List: Re: C of G range Vern, Glad to help. Good luck on getting her airborne. Fly Safe! Randy ----- Original Message ----- From: "Vern Little" Sent: Sunday, June 23, 2013 2:18 PM Subject: Re: Rocket-List: 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 > To: rocket-list@matronics.com > 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 > > ----- No virus found in this message. Checked by AVG - www.avg.com ________________________________ Message 3 _____________________________________ Time: 07:10:09 PM PST US Subject: Re: Rocket-List: Re: C of G range From: Kevin DeVan Congratulations Vern! Thanks, Kevin On Jun 24, 2013, at 5:13 PM, "Vern Little" wrote: > > First engine start was today, no problem except for the prop governor working in reverse (sigh). > > Thanks, V > > -----Original Message----- From: Nancy and Randy > Sent: Monday, June 24, 2013 7:22 AM > To: rocket-list@matronics.com > Subject: Re: Rocket-List: Re: C of G range > > > Vern, > > Glad to help. Good luck on getting her airborne. Fly Safe! > > Randy > ----- Original Message ----- From: "Vern Little" > To: > Sent: Sunday, June 23, 2013 2:18 PM > Subject: Re: Rocket-List: 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 >> To: rocket-list@matronics.com >> 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 > > > > > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rocket-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Rocket-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rocket-list Browse Digests http://www.matronics.com/digest/rocket-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.