I'm off jets... airspeed dropping... Opening the rocket selects.

8 seconds sound clip from the Dimension X - The Outer Limit by Graham Doar classic radio play.

You can hear this line at 00:05:24 in the radio play.

Quote context

[...]

- I'm at forty thousand. Air speed six hundred - she's running fine.

- The soundproofing works. There's a third degree waver in the AGY pressure.

- Got that, Charlie?

- Check.

- Dead center on radar.

- Fifty thousand now... cutting out the port jet. Now the starboard.

- I'm off jets... airspeed dropping... Opening the rocket selects.

- The switch sticks a little, Charlie.

- Actually out the hull, pressure is three-fifty...

- All right now, I'm advancing the ignition key... Here goes rocket one...

- Steve, you all right?

[...]