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MAC/LEMAC

 
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john(at)vormbaum.com
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PostPosted: Fri Mar 03, 2006 5:03 pm    Post subject: MAC/LEMAC Reply with quote
Anybody know the Mean Aerodynamic Chord (MAC) and or LEMAC of a 500-B wing? I somehow found the data a few years ago but have since lost it and can't find it again....and of course, I have no idea how I found it the first time.

Thanks,

/John

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barry.collman(at)air-brit
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PostPosted: Fri Mar 03, 2006 5:30 pm    Post subject: MAC/LEMAC Reply with quote
Hi John,

According to the info I have, MAC on a 500B is at:
70.10 inches, or
5ft 10.1 in, or
1.781 metres

You may have found it in the Maintenance Manual, but here it is given as 70.05
inches, being 118.21 inches from the Fuselage Center Line.
However, the Engineer who worked with Aero Commander's R&D people at Norman has
checked all the dimension figures for us and found this small discrepancy.

Now you know the correct figure, your 500B will fly even better than before Wink

Sincere Best Regards,
Barry

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john(at)vormbaum.com
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PostPosted: Fri Mar 03, 2006 5:46 pm    Post subject: MAC/LEMAC Reply with quote
I had a feeling that Sir Barry would know this!

You refreshed my memory, and the 70.05 figure is the one I think I
had....but now, knowing that it is *really* 70.10, I can load accordingly to
get an extra knot. After all, I'm sure that 5/100ths of an inch makes all
the difference.

Thanks Barry!

/John
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barry.collman(at)air-brit
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PostPosted: Fri Mar 03, 2006 6:04 pm    Post subject: MAC/LEMAC Reply with quote
"After all, I'm sure that 5/100ths of an inch makes all the difference."

Just what my wife was saying earlier...............
................when we were hanging the curtains!!!!!!!!

Barry

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barry.collman(at)air-brit
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PostPosted: Fri Mar 03, 2006 6:27 pm    Post subject: MAC/LEMAC Reply with quote
Hi again!

Actually, thinking about it, the point of MAC is shown on factory drawings as
what I can best describe as "a black&white quartered circle" on the top of the
port wing, on the plan view part of the drawing.

So John, next time you're putting some "motion-lotion" in the tanks, you might
want to look across and see if your circle is still there.
It could, of course though, have been painted-over when you had the plane
re-sprayed? Wink

British humor eh.........doh!!

Best Regards,
Barry
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john(at)vormbaum.com
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PostPosted: Fri Mar 03, 2006 7:00 pm    Post subject: MAC/LEMAC Reply with quote
Yeah, luckily I haven't been married long enough yet to spend a Friday night
hanging curtains!

/J
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