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1. 01:48 PM - CG (BobbyPaulk@comcast.net)
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Just got back from the airport measuring and weighing ( 2 ) Zodiac 601's. I am
aware that the datum can be anywhere you want it. I used to put them at the tip
of the spinner so all the figures would be positive. You would still have to
subtract or add from their datum line to get one different from theirs as well
as the distance to the forward limit would also change.
If you use the leading edge of the wing near the fuselage you must subtract roughly
35mm from the 270mm forward limit so the new forward limit should be 235mm
aft of your datum. The forward sweep makes that much difference ( about 1 3/8"
).
This could easily put you out of the rear limit with light fuel and a heavy passenger.
Your fuel burn makes the CG go aft. Most Jabiru engined 601's will have
to takeoff with reduced fuel to stay under gross weight with a passenger. Some
of them will have to land with at least 6 to 12 gallons on board depending
on the weight of pilot and passenger to keep from going aft of the rear limit
depending on where their CG is located.
By the way we have ( 5 ) 601's in this area and the 3 we compared all have the
left wheel 5/16" to 3/8" further forward than the right. I would be willing to
bet that if you pop a chalk line on the floor from the fourth nose rib out on
the wings and measure to the main wheel axles that there would be a little bit
of difference - not that it matters : )
Never did get the answer to my question which was where can I find Zenith's latest
info on location of the datum line.
Never mind I found it. http://www.zenithair.com/zodiac/xl/data/xl-w&b-2-page.pdf
Thanks to all who answered.
Bobby
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