Jump to content

Tomcat locking pin location..


Recommended Posts

Can anyone tell me what this safety pin, behind the retraction strut,  is for on this tomcat?

 

http://data3.primeportal.net/hangar/howard_mason2/f-14d/images/f-14d_071_of_103.jpg

 

I assume it is to lock the actuator strut, since there is no safety pin on the strut itself.

 

Scott

CNJC-IPMS

Link to post
Share on other sites

Thanks for the info John!

 

It's funny that there is no gear locking pin on the strut itself anywhere. Maybe where the actuator attaches to the strut or somewhere...

 

Scott

CNJC-IPMS

Link to post
Share on other sites
56 minutes ago, F-16 said:

Thanks for the info John!

 

It's funny that there is no gear locking pin on the strut itself anywhere. Maybe where the actuator attaches to the strut or somewhere...

 

Scott

CNJC-IPMS

The only other safety lock used on the nose strut is the kneel strut that prevent the nose gear from going into kneel, there are no other download safety devices/pins for the nose strut.

 

GW

Link to post
Share on other sites
3 hours ago, F-16 said:

Thanks for the info John!

 

It's funny that there is no gear locking pin on the strut itself anywhere. Maybe where the actuator attaches to the strut or somewhere...

 

Scott

CNJC-IPMS

Hi Scott,

 

The strut that angles aft is the drag strut. The actual NLG actuator is quite small in comparison and is located forward of the gear  up in the wheel well. It's the drag strut that locks the gear in the extend position. here is a link to some info on the nose gear.

 

http://www.anft.net/f-14/f14-detail-gearnose.htm

 

Cheers,

 

John

 

Link to post
Share on other sites

From the NATOPS

 

Nose Landing Gear. The dual-wheel nose
landing gear has a shock strut consisting of an outer
cylinder and a lower internal piston that has a maximum
stroke of 18 inches. During normal ground operations,
the strut is fully extended. Pilot control is provided to
kneel the strut (4 inches of stroke remaining) for
catapult operations. During retraction, the fully
extended nose strut is rotated forward by the retract
actuator into the well and enclosed by two forward and
two aft doors. The forward doors are operated by a
separate actuator that also engages the gear uplock,
whereas the two aft doors are mechanically linked to the
shock strut. An uplock hook actuator engages a roller on
the lower piston to hold the gear and doors in the
retracted position. During extension, the telescoping
dragbrace compresses so that a downlock actuator
mechanically locks the inner and outer barrel to form a
rigid member for transmission of loads to the airframe.

 

                                  Note
There is no foolproof visual check of the
nose landing gear locked-down status.
Neither the downlock mechanism, which
is concealed in the fuselage, nor insertion
of the ground lockpin will provide a
positive indication of gear-locked status.
In flight, the pilot must normally rely on
his indicator. Visual determination of
nose landing gear unlocked status is
assisted by a red band painted on the nose
landing gear dragbrace. If red is visible,
the nosegear is not locked.

An additional sequencing switch in series
with the existing down-and-locked
switch provides the pilot with a positive
indication of nosegear position. If the
nose landing gear is unsafe in the down
position because of premature deployment
of the nose landing gear locking
pin, nosegear indicator will indicate
unsafe and transition light will
illuminate.

 

Maximum strut extension and wheel steering angle
are controlled by torque arms interconnecting the

steering collar and the lower piston. The split-type
wheel assembly incorporates tire pressure relief device
to prevent over inflation of the tire. Additional hardware
on the nose landing gear include the launch bar,
holdback fitting, approach lights, nosewheel steering
actuator, and taxi light. The wheel axles incorporate
recessed holes for attachment of a universal tow bar
with maximum steering angle of ±120°.

Link to post
Share on other sites

Since we are on the nose gear...

 

What is that small "wheel" on the tip of the launch bar? When the gear retracts, does this wheel contact the "black" strip area ion the roof of the wheel bay?

 

Scott

CNJC-IPMS

Link to post
Share on other sites
11 hours ago, F-16 said:

Since we are on the nose gear...

 

What is that small "wheel" on the tip of the launch bar? When the gear retracts, does this wheel contact the "black" strip area ion the roof of the wheel bay?

 

Scott

CNJC-IPMS

Yes, the little roller on the end of the launch bar helps the launch bar fold when the NLG is retracted. It contacts the launch bar strip on the top of the wheel well and prevents the launch bar from sticking or catching on something as is folds against the NLG strut as the gear retracts.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...