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ДУ-ТН9В
Test two-engine/motor on:
. Repeat the t e s t with the model's engine running and with someone holding the model.If a
decrease of more than 1 0 % i s noted, research and r e s o l v e the cause of i n t e r f e r e n c e p r i o r to
f l y i n g your model.
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