Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Inaccurate explanation of airfoil lift

This book gives the classic, wrong, "equal time of passage" airfoil lift explanation, making the rest of the contents highly suspect. With an airfoil, the incoming particles do NOT rejoin at the trailing edge. In smoke studies for a high-lift airfoils, the upper flow greatly OVERTAKES the underside flow. The particles do not reconverge, there is nothing in physics that prescribes that they should. Would you trust a book on bridges that said heavier objects fall faster under gravity than lighter objects? Of course not. Likewise with this book and its "particle must catch up" nonsense.