Carf-Models DG 800 S Instruction Manual page 12

High performance glider
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RECENT UPDATE!
Note: During countless test flights it has been noticed that the stab
incidence should be reduced by 0.7 degree in order to maximize
the performance of our DG-800. Even though the plane is flying
very well with the incidence out of the box in slower thermal
flying, the faster you want to fly, the more you feel you need to
trim down elevator.
Please sand or grind the spacer highlighted on the photo down to
zero thickness at the rear. This will reduce the incidence of the
stab just the right amount to allow extremely fast flying at fully
neutral elevator.
The result is that you can move the CG approx. 10-15 mm back by
removing approx. 400 gram of weight out of the nose.
New kits should have the spacer already sanded down in the
factory. Such stabs are marked with a RED DOT on that very spacer
to avoid any misunderstandings.

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