stopping the pumping
I recently read a long article that explained about mast pumping and how to stop it. It(in short) said to take a halyard and wrap the mast from the deck. It explained that wind going around the mast creates 'VORCIES' on the back side which is the noise you hear. The article was long and dry and wtitten by a respected professor. It seemed logical and worth trying since its easy and costs nothing....good luck Gary