---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Tue 09/20/11: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:03 AM - Re: High CHTs (Jack Haviland) 2. 08:28 AM - Stiff slider (Charles Brame) 3. 08:01 PM - Re: Stiff slider (vanremog@aol.com) ________________________________ Message 1 _____________________________________ Time: 04:03:35 AM PST US From: Jack Haviland Subject: Re: RV-List: High CHTs Doug, Thanks for forwarding the link - very interesting reading. If you see Tom Berge please give him my contact information. I'd like to ask some detail questions about his experience if he is willing. Jack H. 810.629.870 On Sep 18, 2011, at 6:58 PM, Doug Weiler wrote: > Jack: > > Our local RV tech counselor Tom Berge has gone through all of the various solutions to high CHTs in his RV-7A and he thinks he has finally found the solution. Check out his article "Plan S" in our September newsletter. Here is the link: > > http://www.mnwing.org/Sept2011.pdf > > Doug Weiler > pres, Twin Cities RV Builder's Group > > > > On 9/16/2011 9:14 AM, Robin Marks wrote: >> >> Jack, are your wheel pants and gear leg fairings in place? >> >> Robin >> >> Sent from my iPad2. >> >> On Sep 16, 2011, at 9:00 AM, Mike Robertson wrote: >> >>> Based on what you state adding the louvers, or increasing the opening of the cowl outlet area, will definately lower oil and cylinder temps. >>> >>> Mike Robertson >>> >>> >>> > From: jgh2@charter.net >>> > Subject: RV-List: High CHTs >>> > Date: Fri, 16 Sep 2011 08:35:05 -0400 >>> > To: rv-list@matronics.com >>> > >>> > >>> > My 6A with 54 hours on a new O-320 still produces CHTs exceeding 400 degrees on all four cylinders when climbing to pattern altitude in 80 degree ambient conditions. They run around 380 degrees at cruise power leaned but the EGTs are about 1430 degrees (the probes are about 2.5 inches from the exhaust flange). The oil temperature never exceeds 200 degrees, the flexible baffles seal tightly to the upper cowling, the upper cowl "eyebrow" ends are sealed, the ignition timing is correct and the carb jet ID has been increased by .003". >>> > >>> > I suspect the lower cowling air outlet area (obstructed by the nose gear strut, exhaust pipes, etc.) restricts the air flow needed to achieve Lycoming's recommended pressure differential between the top and bottom of the engine compartment. The ratio of the cooling air inlet-to-outlet areas appears to be around 1.05 on the stock cowling. Adding two purchased metal louvers would increase it to around 1.24. Measuring the pressure differential is certainly doable but I'm hoping other 6A or 7A owners will share advice based on adding louvers or otherwise improving the air flow through the lower cowling. >>> > >>> > Thanks. >>> > >>> >===================== >>> >============== >>> > >>> > >>> > >>> >>> >>> ef="http://www.matronics.com/Navigator?RV-List">http://www.matronics.com /Navigator?RV-List >>> rums.matronics.com">http://forums.matronics.com >>> "http://www.matronics.com/contribution">http://www.matronics.com/contribut ion >>> >> >> >> > > > ________________________________ Message 2 _____________________________________ Time: 08:28:07 AM PST US From: Charles Brame Subject: RV-List: Stiff slider I had the same problem on my RV-6A. I added a small, aerodynamically shaped tab to the rear of each side skirt. By lifting up on the tab and pulling aft, my canopy opens easily. I made the tabs out of 1"x1" angle, approximately two inches long, They are riveted to the aft center part of the skirt on each side. I'll send a picture but it will probably be next week before I can get out to the airport. An alternative that I have seen, is a small door handle, or a handle made from a D shape (like the inside canopy lock handle) bolted to the rear of the top center stripe of the slider. The handle allows you to pull up and aft when the canopy is closed. Charlie Brame RV-6A N11CB San Antonio ---------------------------------------- > Time: 07:08:38 PM PST US > From: "Richard E. Tasker" > Subject: RV-List: Stiff slider on RV9 > > > I am having difficulty with the canopy on my 9A. What happens is > that it is essentially > impossible to start it sliding from the closed position. > > I thought it was the rear pin blocks that were binding, but it does > the same thing > with them completely removed. > > If I am inside, I can get it started by slightly pushing up on the > rear. From the > outside, the only way is to pull up on the rear. Since the canopy > rear skirts > are not yet installed that is now > possible, but when they are installed it will be impossible. Once I > get it to move > about 1/2 - 1 inch, then it moves back easily. > > I have checked everything I can think of and everything seems to be > spot on, but > I am obviously missing something. > > Has anyone run into this problem? Does anyone have suggestions as to > what I should > look for? > > Dick Tasker ________________________________ Message 3 _____________________________________ Time: 08:01:11 PM PST US Subject: Re: RV-List: Stiff slider From: vanremog@aol.com Report it to your doctor if it lasts for more than 4 hrs....otherwise it's permanent. ;o) -----Original Message----- From: Charles Brame com> Sent: Tue, Sep 20, 2011 8:29 am Subject: RV-List: Stiff slider I had the same problem on my RV-6A. I added a small, aerodynamically shaped tab to the rear of each side skirt. By lifting up on the tab and pulling aft, my canopy opens easily. I made t he tabs out of 1"x1" angle, approximately two inches long, They are riveted to the aft center part of the skirt on each side. I'll send a picture but it will probably be next week before I can get out to the airport. An alternative that I have seen, is a small door handle, or a handle made f rom a D shape (like the inside canopy lock handle) bolted to the rear of th e top center stripe of the slider. The handle allows you to pull up and aft when the canopy is closed. Charlie Brame RV-6A N11CB San Antonio ---------------------------------------- Time: 07:08:38 PM PST US From: "Richard E. Tasker" Subject: RV-List: Stiff slider on RV9 I am having difficulty with the canopy on my 9A. What happens is that it is essentially impossible to start it sliding from the closed position. I thought it was the rear pin blocks that were binding, but it does the sam e thing with them completely removed. If I am inside, I can get it started by slightly pushing up on the rear. Fr om the outside, the only way is to pull up on the rear. Since the canopy rear skir ts are not yet installed that is now possible, but when they are installed it will be impossible. Once I get it to move about 1/2 - 1 inch, then it moves back easily. I have checked everything I can think of and everything seems to be spot on , but I am obviously missing something. Has anyone run into this problem? Does anyone have suggestions as to what I should look for? Dick Tasker -= - The RV-List Email Forum - -= Use the Matronics List Features Navigator to browse -= the many List utilities such as List Un/Subscription, -= Archive Search & Download, 7-Day Browse, Chat, FAQ, -= Photoshare, and much much more: - -= --> http://www.matronics.com/Navigator?RV-List - -======================== -= - MATRONICS WEB FORUMS - -= Same great content also available via the Web Forums! - -= --> http://forums.matronics.com - -======================== -= - List Contribution Web Site - -= Thank you for your generous support! -= -Matt Dralle, List Admin. -= --> http://www.matronics.com/contribution -======================== ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-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/rv-list Browse Digests http://www.matronics.com/digest/rv-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.