Today's Message Index:
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1. 06:18 AM - Oil Temperature Sender (Madre2712@aol.com)
2. 10:18 PM - Re: Zenith701 with A65 (Dave and Pam Fisher)
Message 1
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| Subject: | 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
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| Subject: | 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
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