According to the flight manual my glider has "Airbrakes" and they extend
from the top surface only.

I suspect the same is true of the vast majority of modern gliders

KN

At 22:01 30 September 2013, Jim Kellett wrote:
On Wednesday, September 25, 2013 2:42:08 PM UTC-4, Tom wrote:

Figure 2-9 indicates dive brakes extend top and bottom of wing, while
spo=
ilers are top only.



Um, that's correct. The distinction has been common knowledge for over a
h=
alf-century, but lots of smart people (including some who write POHs!)
stil=
l misunderstand the distinction. Glad to see a proper definition in what
c=
ould become a widely used manual.

See also http://en.wikipedia.org/wiki/Dive_brakes