What's the pin for?

Most fighters have three pins...both mains and nose gear. PapaGeorge

"Bob Moore" wrote in message
6.128...
Mxsmanic wrote
What does it mean when the crew of an aircraft look for "the pin" held
by the ground crew after pushback?

They are looking for the Nose Gear Ground Locking Pin to insure
that it has been removed prior to flight. If not, the nose gear
will not retract.

Bob Moore
ATP B-707 B-727

"6 and 2, counted and stowed" (B-52 checklist response)
6 gear pins and 2 steering lock pins
BT

"PapaGeorge" wrote in message
nk.net...
Most fighters have three pins...both mains and nose gear. PapaGeorge

"Bob Moore" wrote in message
6.128...
Mxsmanic wrote
What does it mean when the crew of an aircraft look for "the pin" held
by the ground crew after pushback?

They are looking for the Nose Gear Ground Locking Pin to insure
that it has been removed prior to flight. If not, the nose gear
will not retract.

Bob Moore
ATP B-707 B-727

On 2007-03-13 18:09:05 -0700, "BT" said:

"6 and 2, counted and stowed" (B-52 checklist response)
6 gear pins and 2 steering lock pins
BT

C-130 had a bunch of pins, too, but I don't remember how many.

--
Waddling Eagle
World Famous Flight Instructor

PapaGeorge writes:

Most fighters have three pins...both mains and nose gear.

What do they do?

I thought aircraft usually had interlocks that would prevent gear from
retracting as long as they had weight on them.

--
Transpose mxsmanic and gmail to reach me by e-mail.

On Mar 13, 10:18 pm, Mxsmanic wrote:
I thought aircraft usually had interlocks that would prevent gear from
retracting as long as they had weight on them.

The "squat switch" interlocks people usually speak of are to prevent
the gear control from being used with weight on the wheels. Nothing
to do with actually mechanically holding the gear down.

Many gear are designed so, yes, they tend to stay in place by
themselves. But put a tug on the front wheels, and you could push
the gear out of place.

Some planes, for example the Airbus, also depend on powered hydraulics
as a separate aid to holding the gear in place. They suggest that
pins be put in place if a tug is used to move an unpowered plane (such
as for maintenance).

Kev

Kev writes:

Some planes, for example the Airbus, also depend on powered hydraulics
as a separate aid to holding the gear in place.

Somehow that doesn't surprise me.

--
Transpose mxsmanic and gmail to reach me by e-mail.

Mxsmanic wrote in
:

Kev writes:

Some planes, for example the Airbus, also depend on powered hydraulics
as a separate aid to holding the gear in place.

Somehow that doesn't surprise me.


God you're a fjukkkwit..


Bertie

"Kev" wrote in news:1173932233.850178.56640
@n76g2000hsh.googlegroups.com:



Some planes, for example the Airbus, also depend on powered hydraulics
as a separate aid to holding the gear in place.

Actualy, no they don't. and you can lower the landing gear in any 'bus
through completely mechanical means and it wil stay down with no
hydraulics powering the system whatsoever..

They suggest that
pins be put in place if a tug is used to move an unpowered plane (such
as for maintenance).

They do that in any type of airplane...



Bertie

Most fighters and bombers also have arming safety pins too.



"PapaGeorge" wrote in message
nk.net...
| Most fighters have three pins...both mains and nose gear.
PapaGeorge
|
| "Bob Moore" wrote in message
| 6.128...
| Mxsmanic wrote
| What does it mean when the crew of an aircraft look for
"the pin" held
| by the ground crew after pushback?
|
| They are looking for the Nose Gear Ground Locking Pin to
insure
| that it has been removed prior to flight. If not, the
nose gear
| will not retract.
|
| Bob Moore
| ATP B-707 B-727
|
|

"Jim Macklin" wrote in message
...
Most fighters and bombers also have arming safety pins too.

That is correct. I was an Aviation Ordnance man.. Worked on A4b Skyhalks..
Guess that is showing my age.

You could play little tricks with the pins.. None of us ever wanted to be on
recovery for night ops.. If any ordnance came back, it could not be brought
back to the mags at night. We would have to post a watch on the trailer.

Pull the pin on the bomb rack when arming and gauranteed no bombs coming
back.

Probably the most inportant pin was in the pilots ejection seat. It was an
added safety feature. The landing gear alone should have disabled ejection.
but.... At NAS Jacksonville.. A guy playing around in the cockpit pulled the
ejection curtain with plane in the hangar, without the pin in. He made quite
a splash on a 50 foot high hangar ceiling. So saftey features always don't
work. All aviation rules are written in blood they say.. So if a pin should
be in. put it in.