How can I keep the zeppelin from turning around

Hint 1 of 8:

Have you gotten past the locked door?

Hint 2 of 8:

And noticed the shortwave radio?

Hint 3 of 8:

You have to keep them from knowing that the zeppelin has to turn around.

Hint 4 of 8:

You could always turn off the radio.

Hint 5 of 8:

But, you're going to have to be more destructive.