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The Monster COD thread (homage to the C-2A Greyhound)

kmac

Coffee Drinker
pilot
Super Moderator
Contributor
This one had something to do with a tail hook failure during a log hit. I don't really know what went wrong with it, kmac can probably explain better.

Sorry for the delay; I was out in California enjoying life. Now I'm back in Texas. As far as the plane with the broken hook, I'll try my best to explain it without using diagrams.

From the cockpit: Everything seemed normal until immediately on the trap, the pilots saw some kind of object fly past the plane (down the LA). When they were told to taxi backward and to raise the hook, nothing happened. Again they were told to raise the hook, but the hook handle was already up. That's when someone on the deck noticed what had happened.

A word about the C-2 tailhook: There are four attachments on the tailhook truss between the actual truss and the aircraft. Each side has a shear bolt (truss pin) that actually holds the hook onto the aircraft. Another point is for retracting the hook, which lifts and then locks the hook with a j-lock. The final point is a dampener which ofcourse dampens the hook on touchdown (and helps prevent hook skips).

From the tailhook truss assembly: Upon touchdown, the hook snaps on one leg engages the wire, and pulls the aircraft to a stop. But what really happened (as shown by the engineering investigation) was much more dramatic. When the hook hit the deck, the dampener acted as a stiff member rather than its job. Somewhere in the life of that part, the parts weren't put together properly. The force of the deck pushing up on the hook, along with the resistance pushing down on the truss assembly (from the bad dampener) created a large moment that sheared the starboard portion of the truss. At this point the hook engaged the wire, therefore putting a linear pull on the hook. Because only one side of the truss was now attached to the aircraft, there was a large moment around the port truss pin. This pin is designed to shear off when there is an excess load, as is the case if the arresting gear on the ship is set too high. By shearing off, the aircraft can have enough speed to continue to fly on the bolter. In this scenario however, due to the assymetric loading, the bolt head popped off and the bolt started to slide through it's attachment rings. This is where it jammed. Most likely, the pilots saw the bolt head flying pass them down the LA. There was 3/4" of the remaining bolt left that jammed.

Big picture: When the hook engaged the wire, the aircrafts speed greatly reduced. It is possible that if the truss pin performed as it was intended to, the aircrafts speed would have been too slow to continue on the bolter, but much too fast to stop on the deck. In other words it is likely that because the truss pin "failed" incorrectly, and that 3/4" remained, there wasn't a Class A mishap. It's a good thing, as they were out there for CQ, with the switch pilots in the back. I want to say that there were 10 souls aboard.

If I have made an error on any of these notes, please forgive me. It has been a while since having to deal with the 4 HMRs that were generated from this.
 

wink

War Hoover NFO.
None
Super Moderator
Contributor
Now here is a sexy COD. For those that aren't old enough, this is Miss Piggy, the converted S-3A to US-3A COD. I got to fly off the ship on one of these mid cruise. I can't remember why we called them Miss Piggy, but on my one flight I know I was squealing with glee all the way. ;)
 

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usmarinemike

Solidly part of the 42%.
pilot
Contributor
bliv·it /ˈblɪv
thinsp.png
ɪt/ Pronunciation Key - Show Spelled Pronunciation[bliv-it] Pronunciation Key - Show IPA Pronunciation –noun Slang.

1.something annoying, ridiculous, or useless.

2.something for which one cannot find a word; something difficult to name.

3.an unpleasant or unsolvable situation or problem.


I see that there is much love for this piece of gear.
 

Malo83

Keep the Faith
Now here is a sexy COD. For those that aren't old enough, this is Miss Piggy, the converted S-3A to US-3A COD. I got to fly off the ship on one of these mid cruise. I can't remember why we called them Miss Piggy, but on my one flight I know I was squealing with glee all the way. ;)
Oh Yeah, remember Miss Piggy from Desert Storm aboard the TOP GUN of the fleet :pirate_12 she was an Angel from above :D
 

nittany03

Recovering NFO. Herder of Programmers.
pilot
None
Super Moderator
Contributor
Ah, the SUPER BLIVET.

I half wonder why we did not keep a few of these around for smaller runs.
On my XC Back in Primary, I ran into a couple of AF A-10 guys at NAS Key West. They said that their community had stopped dropping napalm, and managed to convert a bunch of their old napalm canisters into blivets. So any time they went on the road, they could cram golf clubs, luggage, you name it into as many blivets as necessary. Must be nice . . . :icon_tong
 

Harrier Dude

Living the dream
On my XC Back in Primary, I ran into a couple of AF A-10 guys at NAS Key West. They said that their community had stopped dropping napalm, and managed to convert a bunch of their old napalm canisters into blivets. So any time they went on the road, they could cram golf clubs, luggage, you name it into as many blivets as necessary. Must be nice . . . :icon_tong

All of our blivets are converted NAPALM cannisters. The air force ones are just nicely made, Gucci, and clean. Ours? Not so much.

I once saw an A-10 in Nellis with 4 blivets on it. All pristine. Why? Who knows. Our standard is one per section. Better yet, cram everything under your seat whenever possible. That way when it explodes in flight (BT/DT) you won't lose everything.

Some asshole in Nevada is now running around with my NOMEX flight jacket in his meth lab out in the desert.
 

A4sForever

BTDT OLD GUY
pilot
Contributor
continuing COD threadjack ....

Blivets -- we took a 4-plane to Brunswick once for one guy's wedding -- justified it w/ a low level on the way, and 350-400 lobsters for the squadron spread amongst the blivets on the way back ... ;)

For takeoff -- we briefed pulling the external stores C.B.'s for the respective blivet pylons in case of an airborne emergency off the runway -- potentially
to save our ass and the bird we'd pickle off the externals if called for -- BUT NOT THE LOBSTERS!!!

You just have to have your priorities straight ... :D

/COD threadjack
 

Harrier Dude

Living the dream
continuing COD threadjack ....

Blivets -- we took a 4-plane to Brunswick once for one guy's wedding -- justified it w/ a low level on the way, and 350-400 lobsters for the squadron spread amongst the blivets on the way back ... ;)

For takeoff -- we briefed pulling the external stores C.B.'s for the respective blivet pylons in case of an airborne emergency off the runway -- potentially
to save our ass and the bird we'd pickle off the externals if called for -- BUT NOT THE LOBSTERS!!!

You just have to have your priorities straight ... :D

/COD threadjack


Did you ask for the Lobster 1 departure?
 

nittany03

Recovering NFO. Herder of Programmers.
pilot
None
Super Moderator
Contributor
Did you ask for the Lobster 1 departure?
Sheesh. And here I go off to AirNav.com to see if there really was a LBSTR1•LBSTR or somesuch published for NAS Brunswick.

I am such a nerd. :icon_tong
 

Harrier Dude

Living the dream
Sheesh. And here I go off to AirNav.com to see if there really was a LBSTR1•LBSTR or somesuch published for NAS Brunswick.

I am such a nerd. :icon_tong

I've never flown in there (primarily Weast Coast dude), but when I was a RAG IP all of the East Coast dudes talked about it. Evidently if you ask for "The Lobster 1 Departure" ATC will give you a very slow climb so that the change in pressure won't make the lobsters explode.

Whether or not lobsters actually explode from rapid climbs or if the Lobster 1 departure is an official ATC term........couldn't tell you.

Maybe it's myth and urban legend.
 

A4sForever

BTDT OLD GUY
pilot
Contributor
.....Whether or not lobsters actually explode from rapid climbs or if the Lobster 1 departure is an official ATC term........couldn't tell you.

Maybe it's myth and urban legend.
I think myth ... we just let the good times roll ... and while the lobsters were in great shape when we landed @ home plate, they were really, really pissed off.

They tasted good, however. :)
 

FlyinSpy

Mongo only pawn, in game of life...
Contributor
Whether or not lobsters actually explode from rapid climbs or if the Lobster 1 departure is an official ATC term........couldn't tell you.

Hell, just carry them in a box inside the cockpit with you. The downside is when the box springs a leak, and lobster juice runs out all over the seat cushion of ECMO-2. After the jet sits with a closed canopy for a couple of days in the mid-Atlantic summer sun, it can get pretty stinky. The next crew to fly that jet was not happy...
 
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