On Apr 13, 7:06*am, Walt Connelly Walt.Connelly.
wrote:
'Martin Gregorie[_5_ Wrote:





;768541']On Tue, 12 Apr 2011 19:45:21 +0000, Walt Connelly wrote:
-
When I am the
wing runner, unless a pilot tells me he is taking off with partial
spoilers I try to insure that * they are closed and that the tail
dolly
is off among other things.
-
I agree that the tail dolly is easily spottable by wing runner, etc.,
but
this doesn't necessarily apply to airbrakes. If they are unlocked, on
many gliders they'll be flush with the wing surface so that neither wing

runner or tow pilot can tell whether they are locked or not and will
suck
open during the launch.

In my club we use the CBSIFTCBE check where the Brakes item requires the

pilot to open the brakes fully, check for equal extension, do the same
for half brake, and then close and lock them. This, by itself, is a
pretty good assurance that they'll be locked but the pilot can still get

interrupted while he's doing checks and forget 'brakes', so this season

the winch cable hooker-onner has instructions not to put the cable on
unless the pilot explicitly says "Brakes locked: cable on, please" and
to
prompt the pilot if he doesn't report brakes locked.

This procedure also makes sense for aero tow.

--
martin@ * | Martin Gregorie
gregorie. | Essex, UK
org * * * |

Good point, well taken. *While the brakes can suck open if not locked,
the wing runner visual inspection is only part of the safety sequence.
Still I have seen people give me the thumbs up while the spoilers were
clearly open. The requirement to have the pilot specifically state
"brakes locked, cable on please," is a good one. *The more we can do to
eliminate errors the better.

Walt

--
Walt Connelly- Hide quoted text -

- Show quoted text -

Well I know it's been said many times before but ... Please recognize
that many pilots of Std Class gliders will always start takeoff roll
with airbrakes open. If you see the brakes moving it's a sign the
pilot's hand is on the handle and he knows they are open. If you see
the brakes open as the slack comes out, be aware that is a normal
event and do not stop the launch.

On most modern gliders brakes that are closed but not locked will
leave the brake caps slighly above flush. Look for that and if they
don't open then consider stopping the launch.

At a site where I am not known I'll usually tell the wing runner and
the tow pilot that the brakes will be open at the start of takeoff
roll. Some pilots cycle the brakes a few times as the slack comes out
so the tuggie knows what to expect.

Andy