Hi Great Engineers, Need you help. I am required to calculate drag load on sticker to ensure it is not peeling off in operation. The vehicle may moves as fast as 220 km/hr with rectangular sticker size of 30 cm x 40 cm, thickness 0.0635 mm on its body. Wind direction is parallel to 40 cm length and perpendicular to 30 cm sticker length. My first though is using (1/2)*row*A*V^2*Cd basic formula to get the drag load. for each value : A = 30 cm * 0.0635 mm ... (unit conversion will be done in actual calc.) V^2 = 200^2 km/hr .... (unit conversion will be done in actual calc.) Row = density of the air at that altitude Cd = not sure about the valid strong value for reference, but i will use the Cd for rectangular shape which have been establish in few reference to NASA docs. May change if I found another publication that I feel confidence. Does this method acceptable? Is there is another factor that I need to take into consideration? Please do highlight. My purpose is not to get accurate answer on the drag load, but being conservative is good already. Our main objective is just to ensure it wont peeled of during operation. So accurate value of drag load is not necessary. If required to install any test set to gain some value on vehicle is also impossible as we have no access to it and may cost money for operation. the sticker that i used is ORACLE 651 material. Datasheet can be found on the net.