FYI, I have been following KR for years, bought a KR Super 2S project, and attended 2015 gathering in Oregon. But now have sold the project and completed a Zenith CH-650 and flown that from WA to OSH twice. (Have 4 builder/owners and they didn't want KR plus we got the wings for free from EAA.) Have a Rotax 912 carb version in the Zenith. There's 4 owners but only 2 pilots right now for the Zenith. (Have 2 shares for sale to pilots if anyone is around Snohomish County, WA.)
Per avgas, I find it interesting that Rotax recommends mogas but the plane will run on either or a mix. Rotax says if we run avgas change oil every 50 hrs. If we run mogas change oil every 100 hrs. We can see the difference in how fast the oil goes black, but no difference in performance (maybe 2% better on avgas). Obviously we can't go cross county and easily fill up on mogas, so we generally change oil every 75 hrs, which is about twice a year. We can run with alcohol, but choose not to and get mogas w/o from local Co-op. Interesting story - we have maintenance done by Aircore at KAWO - they specialize in experimentals, Rotax, and Dynon (we have full Dynon system). Customer came in who ran mogas w/alcohol and complained of fuel leak at gascolator. They took the system apart and saw that gasket on bowl was oversize. They thought wrong size gasket was installed. They got a new gasket and when they returned they checked again and when comparing found original gasket had shrunk back to spec size. Seems the alcohol caused gasket to swell, but after 15 minutes on the bench it evaporated and returned to normal size. This would make troubleshooting very difficult. They swapped for a gasket of different material and all was OK. Moral or the story is be careful as you'll never know what tiny part of your fuel system will be affected by alcohol! Jim McGauhey WA (I shot and posted Mark Langford's Fiberglass 101 seminar from McMinnville, Oregon gathering in 2015.) https://youtu.be/sVYfaTnIsSc _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/[email protected]/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to [email protected]
