hi,

A large sheet of 6 mil clear plastic should be able to
cover the tower and the folded over section.

Place a container of DampRid on the rotor shelf
before you cover the tower with the plastic sheets.

Two layer of sheet should do the trick.

Drape the plastic 4 or 5 feet below the rotor,
no way for any water to get inside the rotor.

Tie it tiht with some good rope and your done.

The damp rid will absorb any moisture that it
trapped during the day from the hot sun
heating up the top of the 'rotor bag' you just made.

Or just take the rotor inside.

good luck with the repairs.

russ