---------------------------------------------------------- Zenith701801-List Digest Archive --- Total Messages Posted Tue 03/19/13: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:18 AM - Oil Temperature Sender (Madre2712@aol.com) 2. 10:18 PM - Re: Zenith701 with A65 (Dave and Pam Fisher) ________________________________ Message 1 _____________________________________ Time: 06:18:20 AM PST US From: Madre2712@aol.com Subject: Zenith701801-List: Oil Temperature Sender Just completed a Zenith 701 with a Jabiru 2200 engine and a new Grand Rapids Tech digital instrument in the panel. Before the first run up when turning on the master, the instrument indicated a 195 degrees. After a short run up, the instrument indicated 250 and when checking the oil with a temperature gun it read only 150. Am checking grounding of the oil temperature sender and it appears to be correct. Am thinking that the sender needs to be replaced. Has anyone else had this problem and if so, how did they resolve it. Thanks for all imputs. Eldon ________________________________ Message 2 _____________________________________ Time: 10:18:03 PM PST US From: Dave and Pam Fisher Subject: Zenith701801-List: Re: Zenith701 with A65 Hi! I'm still building so take this for what it's worth. I acquired an old A65 ground power unit and rebuilt it into an A80 at an Aviation school (WNCC here in western Nebraska). The conversion wasn't difficult. The differences in the two engines are called out in the old maintenance manual for the "A" Series engines. It involved high compression pistons, a larger carb venturi and jet to suit your altitude. I drilled a one sixteenth inch diameter hole in each rod cap to squirt a bit more oil at the opposite cylinders and changed the valves. I also balanced the rods and pistons. The A80 gets its higher horsepower primarily by turning at a higher RPM. I think the information from Tony Riley and David Orr is right on target and I expect similar numbers ( my Tennessee prop is 70 inches long with a pitch of 40 inches). After much agonizing I decided to go with VGs and no slats and I got permission from Chris Heintz to stretch my wing span by two feet. My thinking is that the 80 HP Continental will be a bit anemic at my altitude ( 4000 ft and up), so I'll need all the wing area and efficiency I can get. That said, with an empty weight of 600 lbs and about the same wing span as the 0-200 powered CH750, I should be enough lighter than the CH750 to get about the same takeoff and climb performance with my 80 HP engine. The secret ,I think, is to keep the plane as simple and light as possible. I'm sure a C85 or a 100 HP Rotax will outperform my A80 but most of my flying will be solo and it should be a cheap reliable engine. Good luck and thanks to all for an interesting thread! Dave Fisher, 701 with A80 At 01:01 AM 3/19/2013, you wrote: >I have a friend who is looking at buying a scratch built ch-701.. >This aircraft has a A65 Continental engine rated at 65 hp ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message zenith701801-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Zenith701801-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/zenith701801-list Browse Digests http://www.matronics.com/digest/zenith701801-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.