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Load factor-exact data?

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datamed1

datamed1

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Hi, I made a little calculation about the load factors of my PA-28-140. The original catalog data (KIAS): Va: 114 Kts, Vmin 50 Kts, maximum positive load factors: 3.8G (2150 lbs) Here is the surprise: the calculated load factor is at Va: 5.198G!!! My formula: n=(Va/Vmin)^2
Does anyone help to me: where is the mistake: in data or in the formula? Thanks.
 

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