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Old Nov 14, 2012, 02:17 PM
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Joined Nov 2012
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beginner needing help to balance my plane

I know this will be a silly question to you guys but when setting up the centre of gravity on my plane should the fuel tank be full or empty.. I have a thunder tiger ready mk3
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Old Nov 14, 2012, 02:41 PM
Illegitimi non carborundum
grosbeak's Avatar
Canada, ON, Ottawa
Joined Mar 2011
1,202 Posts
Not at all. The tank should be empty.
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Old Nov 14, 2012, 04:45 PM
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Originally Posted by grosbeak View Post
Not at all. The tank should be empty.
Thanks for your help..saves my first flight turning into a rocket launch
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Old Nov 14, 2012, 06:54 PM
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USA, FL, Palm Harbor
Joined Jan 2005
3,430 Posts
Just so you have an understanding as to why....

1) If you balance with the tank full... it will be on the tail heavy side when the fuel burns off.... making it quite difficult to fly and land later in the flight.

2) If you balance with the tank empty... you'll start out a bit nose heavy (alway preferable to tail heavy) and as the fuel burns off it will come into balance more and more.
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Old Nov 16, 2012, 10:21 AM
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United States, OH, Willshire
Joined Jul 2012
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I know this is an old thread but I always try to locate my fuel tanks as near to the CG as possible. I know this is not always an option but it is something I always try to do. All of my scratch built nitro/gas planes are built with the tank at the CG.
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Old Nov 18, 2012, 10:01 AM
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USA, MD, Hagerstown
Joined Jun 2009
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I'm at the same point with my TF 60 size Corsair. Without the rx and ignition pack installed the plane balanced perfect at 4 1/8" as listed in the manual. With the packs in it moved the cg back between 1/8-1/4". I tend to like my Corsairs at the center of the cg range to just a bit aft. All of the tank is in front of the cg on this one so I figure it will still start out nose heavy. Only way I should end up tail heavy is to run the tank dry and if that happens cg won't be my only problem.
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Old Nov 18, 2012, 12:36 PM
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HA Ha.....
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