---------------------------------------------------------- RV10-List Digest Archive --- Total Messages Posted Wed 01/26/22: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:39 AM - High altitude airport Ops (Dan Masys) ________________________________ Message 1 _____________________________________ Time: 06:39:36 AM PST US From: Dan Masys Subject: RV10-List: High altitude airport Ops Bob's right. Although peak EGT is stoichiometric fuel+air and is the most complete combustion, best power occurs about 100-125 rich of peak. Thanks for reminding me so there is more power available for the next Tahoe run. And looking it up Vy does decrease with altitude while Vx increases. So you can pretty much ignore my entire post, other than somehow I have been able to survive the mountains so far in my RV-10. : ) -Dan Masys Time: 01:36:06 PM PST US Subject: RV10-List: Re: High altitude airport Ops From: "Bob Turner" Dan, I respectfully disagree with some of your post. First, be very careful interpreting the GRT power reading. It just works off a look up table that you entered, and, in particular, does not know the actual mixture ratio wrt peak egt. Second, lean to best power, not peak egt, if there is any question about having sufficient power for takeoff. Best power is about 125 F rich of peak EGT. And with a long runway, go even richer, to help keep CHTs down. As you note, caution is needed with downwind takeoffs. I wont accept more than a 5 knot tailwind component. And while some airports really are one-way, KTVL isnt one of them. Its a bit tight, but a -10 can takeoff to the south and execute a left downwind departure. And if it wont climb fast enough, there is a golf course a bit further south over which you can circle. Vy (in IAS) decreases, not increases, as density altitude goes up. But you do need to watch CHTs. I recommend flaps in trail for these takeoffs. -------- Bob Turner RV-10 QB ------------------------------------------------------------------------------------- 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.