Challenger Crashe at TEB

Anyone here know what kind of control locks are installed on the
Challengers?


They don't have control locks. They are boosted controls and have
dampers when no pressure is on.

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.. I've
never heard of a modern bizjet using control locks, but I suppose there
are some that do.


Matt

Gulfstreams have locks as well as some others, but Challengers don't


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"Matt Whiting" wrote in message
...
Blueskies wrote:

I've never heard of a modern bizjet using control locks, but I suppose
there are some that do.


Every one I have ever flown does, but I have not flown Challengers. I would
be they do though as they have to have wind gust protection while parked.

Every one I have ever flown does, but I have not flown Challengers. I would
be they do though as they have to have wind gust protection while parked.


Gary,
The challengers have dampers that come into effect when there is no
boost pressure. On Falcons, the hydraulic actuators essentially lock
up with no pressure. Neither require any other locks. If memory
serves, Gulfstream locks the rudder only.


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"Don Hammer" wrote in message
...
Gary,
The challengers have dampers that come into effect when there is no
boost pressure. On Falcons, the hydraulic actuators essentially lock
up with no pressure. Neither require any other locks. If memory
serves, Gulfstream locks the rudder only.

Thanks for the clarification. All the ones I have flown are cable actuated
and they of course have gust locks. Even so, one of our Lears had the
rudder stops beat up when a Falcon parked right behind us blew our rudder
around, even with the gust lock installed. Ouch.

Thanks for the clarification. All the ones I have flown are cable actuated
and they of course have gust locks. Even so, one of our Lears had the
rudder stops beat up when a Falcon parked right behind us blew our rudder
around, even with the gust lock installed. Ouch.


I know the feeling. I am completing a G-550 for a client. A couple
of months ago they pushed it out of the paint hangar. The spoiler
boards were disconnected from their actuators so they could paint
under them. An airliner coming off of the gate swung around and blew
the boards open damaging them and the panels forward of the boards.
Big ouch!!!

Large transport aircraft either restrict or stop the hydraulic flow to
and from the actuators with pressure off so they don't need any other
locks.

"Don Hammer" wrote in message
...

Large transport aircraft either restrict or stop the hydraulic flow to
and from the actuators with pressure off so they don't need any other
locks.

As the late Johnny Carson would say, "I didn't know that."

Any insight on what may cause the Challenger to be unable to unstick?

"Gary Mishler" wrote in message news:jGANd.52214$EG1.44351@attbi_s53...

"Matt Whiting" wrote in message ...
Blueskies wrote:

I've never heard of a modern bizjet using control locks, but I suppose there are some that do.


Every one I have ever flown does, but I have not flown Challengers. I would be they do though as they have to have
wind gust protection while parked.



Just heard that the pilot of the Colorado plane said the controls were locked up also, couldn't move the yoke...

Under what circumstances are pilots required to calculate an
accelerate-stop distance, and take off only on a runway that is longer
than that distance?

Jose
--
Nothing is more powerful than a commercial interest.
for Email, make the obvious change in the address.

Jose wrote

Under what circumstances are pilots required to calculate an
accelerate-stop distance, and take off only on a runway that is longer
than that distance?

This runway was longer than the required accelerate/stop distance.
Vr is normally higher than V1 (but not always), it cannot be less
than V1. Once past V1, there is no guarantee that the airplane will
stop on the runway, in fact, if it is exactly a balanced field, it
will not stop on the runway.

He was simply past V1 and probably past Vr when the problem was
recognized.

Bob Moore