"El Gran Cantinflas" wrote in message
...



What a speed brake?

A speed brake is a device that pops up out of the wing on a fixed wing
aircraft. It's purpose is to add lots of drag and partially kill lift to
assist an aerodymically clean aircraft to slow down and/or descend more
steeply without gaining unwanted airspeed.

I found some pictures of a speed brake at
http://www.express-builder.com/gallery/album09/aaj. In this case it's an
installation on an experimental aircraft but it'll give you a little idea of
what the assembly looks like.

Fly Safe,
Steve R.