---------------------------------------------------------- RV10-List Digest Archive --- Total Messages Posted Sun 02/15/15: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:54 AM - Re: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins (Bob Leffler) 2. 03:43 AM - Re: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins (Patrick Pulis) 3. 04:43 AM - Re: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins (Bob Leffler) 4. 05:15 AM - Re: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins (Michael Kraus) 5. 05:55 AM - Re: Rear Aft Case Baffle Modification to Enable More Airflow Aro (bill.peyton) 6. 07:03 PM - Re: New (Free) Aviation App (gbrasch) 7. 09:27 PM - Re: Re: New (Free) Aviation App (Kelly McMullen) ________________________________ Message 1 _____________________________________ Time: 02:54:55 AM PST US Subject: Re: RV10-List: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins From: Bob Leffler I did this last summer and it took me awhile, but a small file is the only way I know how to finish the filings smooth. I did use a long #30 bit to help remove some of the mass. I had several fins that were almost completely block. I also placed a couple washers on the screw that goes into the aft side of #5 cylinder. This helped quite a bit as well by creating a small gap between the cylinder and the baffle. Bob Sent from my iPad > On Feb 15, 2015, at 1:06 AM, Patrick Pulis wrote: > > Could anyone please indicate if they have modified the Right Aft Case Baffle (CB-1007A) to enable more airflow around the fins of the right rearmost cylinder head fins? > > The No. 5 cylinder head fins are very shallow where they butt up against the Right Aft Case Baffle and was thinking of modifying the case baffle to enable more airflow around the cylinder fins. > A friend has conducted this modification on his RV-6 and has reported reduced rearmost cylinder head temperatures. > > As per Tim Olsons advice I am also filing out the cooling gaps between the fins on each cylinder near the spark plugs. After shining a torch down there, some of the fins are just showing an air gap due to the casting flash. If you've also done this, is there an easier way to do this compared to using a very narrow flat file? > > Warm regards > > Patrick > > > 

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________________________________ Message 2 _____________________________________ Time: 03:43:45 AM PST US Subject: Re: RV10-List: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins From: Patrick Pulis Bob Did you notice and change (i.e. reduction in CHT on #5) after filing out and enlarging the fin holes and adding the washer? I'm thinking of modifying the baffle itself to allow more air to flow around the aft side of the #5 cylinder. Warm regards Patrick > On 15 Feb 2015, at 21:22, Bob Leffler wrote: > > > I did this last summer and it took me awhile, but a small file is the only way I know how to finish the filings smooth. I did use a long #30 bit to help remove some of the mass. I had several fins that were almost completely block. > > I also placed a couple washers on the screw that goes into the aft side of #5 cylinder. This helped quite a bit as well by creating a small gap between the cylinder and the baffle. > > Bob > > Sent from my iPad > >> On Feb 15, 2015, at 1:06 AM, Patrick Pulis wrote: >> >> Could anyone please indicate if they have modified the Right Aft Case Baffle (CB-1007A) to enable more airflow around the fins of the right rearmost cylinder head fins? >> >> The No. 5 cylinder head fins are very shallow where they butt up against the Right Aft Case Baffle and was thinking of modifying the case baffle to enable more airflow around the cylinder fins. >> A friend has conducted this modification on his RV-6 and has reported reduced rearmost cylinder head temperatures. >> >> As per Tim Olsons advice I am also filing out the cooling gaps between the fins on each cylinder near the spark plugs. After shining a torch down there, some of the fins are just showing an air gap due to the casting flash. If you've also done this, is there an easier way to do this compared to using a very narrow flat file? >> >> Warm regards >> >> Patrick >> >> >> 

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> > > > > ________________________________ Message 3 _____________________________________ Time: 04:43:27 AM PST US Subject: Re: RV10-List: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins From: Bob Leffler Most definitely! I think the drop was about 10f, but I would have to look at my logs to get the precise drop. It went from being one of the hottest, to being one of the coolest. Bob Sent from my iPad > On Feb 15, 2015, at 6:40 AM, Patrick Pulis wrote: > > > Bob > > Did you notice and change (i.e. reduction in CHT on #5) after filing out and enlarging the fin holes and adding the washer? > > I'm thinking of modifying the baffle itself to allow more air to flow around the aft side of the #5 cylinder. > > Warm regards > > Patrick > >> On 15 Feb 2015, at 21:22, Bob Leffler wrote: >> >> >> I did this last summer and it took me awhile, but a small file is the only way I know how to finish the filings smooth. I did use a long #30 bit to help remove some of the mass. I had several fins that were almost completely block. >> >> I also placed a couple washers on the screw that goes into the aft side of #5 cylinder. This helped quite a bit as well by creating a small gap between the cylinder and the baffle. >> >> Bob >> >> Sent from my iPad >> >>> On Feb 15, 2015, at 1:06 AM, Patrick Pulis wrote: >>> >>> Could anyone please indicate if they have modified the Right Aft Case Baffle (CB-1007A) to enable more airflow around the fins of the right rearmost cylinder head fins? >>> >>> The No. 5 cylinder head fins are very shallow where they butt up against the Right Aft Case Baffle and was thinking of modifying the case baffle to enable more airflow around the cylinder fins. >>> A friend has conducted this modification on his RV-6 and has reported reduced rearmost cylinder head temperatures. >>> >>> As per Tim Olsons advice I am also filing out the cooling gaps between the fins on each cylinder near the spark plugs. After shining a torch down there, some of the fins are just showing an air gap due to the casting flash. If you've also done this, is there an easier way to do this compared to using a very narrow flat file? >>> >>> Warm regards >>> >>> Patrick >>> >>> >>> 

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> > > > > ________________________________ Message 4 _____________________________________ Time: 05:15:51 AM PST US From: Michael Kraus Subject: Re: RV10-List: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins Adding a couple washers behind #5 (or behind #3 on a 4 cylinder engine) is a pretty standard RV trick. It definitely reduces CHT on that cylinder. I learned it on my RV-4, and did it again on my RV-10. -Mike Kraus Sent from my iPhone > On Feb 15, 2015, at 1:06 AM, Patrick Pulis wrote: > > Could anyone please indicate if they have modified the Right Aft Case Baffle (CB-1007A) to enable more airflow around the fins of the right rearmost cylinder head fins? > > The No. 5 cylinder head fins are very shallow where they butt up against the Right Aft Case Baffle and was thinking of modifying the case baffle to enable more airflow around the cylinder fins. > A friend has conducted this modification on his RV-6 and has reported reduced rearmost cylinder head temperatures. > > As per Tim Olsons advice I am also filing out the cooling gaps between the fins on each cylinder near the spark plugs. After shining a torch down there, some of the fins are just showing an air gap due to the casting flash. If you've also done this, is there an easier way to do this compared to using a very narrow flat file? > > Warm regards > > Patrick > > > 

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________________________________ Message 5 _____________________________________ Time: 05:55:11 AM PST US Subject: RV10-List: Re: Rear Aft Case Baffle Modification to Enable More Airflow Aro From: "bill.peyton" To really fix it you need to increase the airflow behind the #5 cylinder. Ultimately the only way I was able to get #5 in line with the rest of the cylinders was to trim the front dams to around 1/3 of their original height and then to modify the rear baffle by extending the stock slit to come up further on the baffle and allow the straightening of the top bend to obtain a 1/8th inch gap behind the #5 cylinder. I used RTV to fill in the gap created by the mod. I ordered a new baffle piece to modify and install at the next annual to eliminate the RTV. Below is the best photo I can find. I did not file any of the fins, I just made sure there were no leaks. My CHT will rarely get to 400 in a climb unless its over 90 degrees OAT., and that's only in an extended full throttle climb. I typically climb out at 120kts. -------- Bill WA0SYV Aviation Partners, LLC Read this topic online here: http://forums.matronics.com/viewtopic.php?p=438365#438365 Attachments: http://forums.matronics.com//files/img_2898_158.jpg http://forums.matronics.com//files/img_2898_154.jpg ________________________________ Message 6 _____________________________________ Time: 07:03:55 PM PST US Subject: RV10-List: Re: New (Free) Aviation App From: "gbrasch" Wanted to update the list with the following, the Airport Courtesy Car app as of this date has over 1300 listings nationwide with over 5000 pilots that have downloaded the app. It continues to be covered by major publications. Since AvWeb covered it and AOPA Pilot magazine in the February issue, it has most recently been favored by G.A. News. Also I can now upload pictures of your favorite crew cars to the state listings, so email those pictures to me at airportcars101@gmail.com. And keep those entries coming! -------- Glenn Brasch RV-9A Flying 1952 Piper Tri-Pacer Medevac Helicopter Pilot (Ret) Tucson, Arizona Owner, www.RVairspace.com and "Airport Courtesy Cars" Smart Phone App www.RVairspace.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=438397#438397 ________________________________ Message 7 _____________________________________ Time: 09:27:50 PM PST US Subject: Re: RV10-List: Re: New (Free) Aviation App From: Kelly McMullen Glenn, Any chance you might port this to the web or to a Windoze platform? There are a few of us that don't use IOS or Android devices, still. On Sun, Feb 15, 2015 at 8:01 PM, gbrasch wrote: > > Wanted to update the list with the following, the Airport Courtesy Car app > as of this date has over 1300 listings nationwide with over 5000 pilots > that have downloaded the app. It continues to be covered by major > publications. Since AvWeb covered it and AOPA Pilot magazine in the > February issue, it has most recently been favored by G.A. News. Also I can > now upload pictures of your favorite crew cars to the state listings, so > email those pictures to me at airportcars101@gmail.com. And keep those > entries coming! > > -------- > Glenn Brasch > RV-9A Flying > 1952 Piper Tri-Pacer > Medevac Helicopter Pilot (Ret) > Tucson, Arizona > Owner, www.RVairspace.com and "Airport Courtesy Cars" Smart > Phone App > www.RVairspace.com > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=438397#438397 > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv10-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV10-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/rv10-list Browse Digests http://www.matronics.com/digest/rv10-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.