---------------------------------------------------------- RV8-List Digest Archive --- Total Messages Posted Sun 03/28/10: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:25 AM - Sealing Around Engine Baffles... (Matt Dralle) 2. 12:44 PM - Re: Sealing Around Engine Baffles... () 3. 01:11 PM - Re: Sealing Around Engine Baffles... () 4. 04:02 PM - Re: Sealing Around Engine Baffles... (Dan Bergeron) ________________________________ Message 1 _____________________________________ Time: 09:25:12 AM PST US From: Matt Dralle Subject: RV8-List: Sealing Around Engine Baffles... Dear Listers, Regarding the requirement for sealing compound (silicon?) around the baffle-to-engine areas, what is the recommendation here? Is sealant absolutely necessary? Adding a compound is going to really ugly-up the installation. :-( If it is an absolute requirement, what are some suggestions on material to use? About all I could find on ACS was this: http://www.aircraftspruce.com/catalog/mepages/rtv.php At least it comes in Black to match my engine... ;-) Feedback would be most appreciated. Matt Dralle RV-8 #82880 N998RV http://www.mattsrv8.com Matt's Construction Blog Moved to hanger, wings attached permanently.... ________________________________ Message 2 _____________________________________ Time: 12:44:50 PM PST US From: Subject: Re: RV8-List: Sealing Around Engine Baffles... Unfortunately if you are going to seal around the engine baffles to the engine then it will be RED as you need a hight temp. Louis ---- Matt Dralle wrote: > > > Dear Listers, > > Regarding the requirement for sealing compound (silicon?) around the baffle-to-engine areas, what is the recommendation here? Is sealant absolutely necessary? Adding a compound is going to really ugly-up the installation. :-( > > If it is an absolute requirement, what are some suggestions on material to use? > > About all I could find on ACS was this: > > http://www.aircraftspruce.com/catalog/mepages/rtv.php > > At least it comes in Black to match my engine... ;-) > > Feedback would be most appreciated. > > Matt Dralle > RV-8 #82880 N998RV > http://www.mattsrv8.com Matt's Construction Blog > Moved to hanger, wings attached permanently.... > > > > > ________________________________ Message 3 _____________________________________ Time: 01:11:55 PM PST US From: Subject: Re: RV8-List: Sealing Around Engine Baffles... Unfortunately if you are going to seal around the engine baffles to the engine then it will be RED as you need a hight temp. Louis ---- Matt Dralle wrote: > > > Dear Listers, > > Regarding the requirement for sealing compound (silicon?) around the baffle-to-engine areas, what is the recommendation here? Is sealant absolutely necessary? Adding a compound is going to really ugly-up the installation. :-( > > If it is an absolute requirement, what are some suggestions on material to use? > > About all I could find on ACS was this: > > http://www.aircraftspruce.com/catalog/mepages/rtv.php > > At least it comes in Black to match my engine... ;-) > > Feedback would be most appreciated. > > Matt Dralle > RV-8 #82880 N998RV > http://www.mattsrv8.com Matt's Construction Blog > Moved to hanger, wings attached permanently.... > > > > > ________________________________ Message 4 _____________________________________ Time: 04:02:59 PM PST US Subject: Re: RV8-List: Sealing Around Engine Baffles... From: Dan Bergeron Matt: Absolutely use a sealant - anything you can do to keep those cooling breezes flowing where they're supposed to flow, and not leak out uselessly through holes, gaps and unsealed margins, helps keep that expensive engine cool and happy. Take a long, analytical look at the cowling arrangement on an RV. They are tightly cowled; that's one of the reasons they go fast on relatively little fuel. (My RV-7A, with an IO-360 at 2300 rpm, leaned conservatively and cruising between 4000' and 8000', does 142 kph (give or take a few) and burns 7.5 gph. Up high the engine is putting out < 60% power. Oil temp stays right around 180 - 185, even on a warm day) Make sure you install a good oil cooler, ducted into a gate valve, installed in a rear baffle (My cooler is on the right side of the firewall, down low enough that I was able to install a homemade plenum chamber above it and a length of SCAT tubing connecting the plenum to the gate valve. The gate valve is controlled from the instrument panel via a push/pull cable. The valve came out of a woodworker's supply catalogue; modified just a bit. It's classic Vans - light - simple - inexpensive and works great. Get yourself a couple tubes of red, high temp RTV; pull on some rubber gloves and have at it. I'll tell you the same thing my wife told me after my first attempts at spraying primer on the internal parts of the tail: "Only the bugs will ever see it." Unless of course you change the oil or do engine maintenance in a public place: In which case you have an excuse at the ready: "My wife did it when I wasn't looking." Cheers, Dan Bergeron RV-7A - N307TB (Spero II) 127 hours since first flight on 8/4/09 On Sun, Mar 28, 2010 at 12:23 PM, Matt Dralle wrote: > > > Dear Listers, > > Regarding the requirement for sealing compound (silicon?) around the > baffle-to-engine areas, what is the recommendation here? Is sealant > absolutely necessary? Adding a compound is going to really ugly-up the > installation. :-( > > If it is an absolute requirement, what are some suggestions on material to > use? > > About all I could find on ACS was this: > > http://www.aircraftspruce.com/catalog/mepages/rtv.php > > At least it comes in Black to match my engine... ;-) > > Feedback would be most appreciated. > > Matt Dralle > RV-8 #82880 N998RV > http://www.mattsrv8.com Matt's Construction Blog > Moved to hanger, wings attached permanently.... > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv8-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV8-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/rv8-list Browse Digests http://www.matronics.com/digest/rv8-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.