H-KING Sopwith Camel British WW1 Fighter Instruction Manual page 7

You may install the empennage at this time. Apply small amount of slow curing CA
glue to the fuselage. Also apply slow curing CA glue to the hinge on the rudder. So
you need to insert the hinge onto the rudder and fuselage and also install the
empennage onto the fuselage at this time.
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