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Another question concerning Vietnam WT F-4J


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Hello,

 

I would like to know what the most realistic option is for 2x LAU-10 and 2x LAU-3 attached to a TER (F-4J VMFA-232 1967).

 

 

A) 1x LAU-10 and 1x LAU-3 (inboard) on same TER.

 

B) 2x LAU-10 on right TER and 2x LAU-3 on left TER.

 

Both TER's will have a LAU-33 and a single AIM-9B (outboard portside).

 

 

 

 

Rgds,

Duncan

 

 

 

20170415_144915_zpsx9q9qxio.jpg

 

20170417_154146_zpsjujanyvd.jpg

 

20170418_060602_zps6b82jofq.jpg

 

 

Edited by cag_200
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Hi Duncan, although the squadron did get the F-4J in 1967, they didn't deploy to Vietnam until 1969 with them, only for a few months before returning in 1972. As for the load, i don't think they would have a mix load on the i/b pylons, the rockets have different delivery methods so the crew have to know which side had which rockets. It is possible to have Zunis on the i/b TERS and TERs on the o/b pylons with the LAU-3s. Also unless you have photographic evidence of AIM-9 and LAU-33 on the same pylon it's best to have the LAU-33 on one side of the a/c and the AIM-9 on the other i/b pylon because in the heat of battle there is a good chance of firing the AIM-9 as i think it automatically steps to the next launcher when one is fired. Meaning when the LAU-33 Zunis are fired the firing sequence switches to the next launcher and if an AIM-9 is on it, it gets launched.

 

Jari

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Thank you Guys!  

 

The picture (photocopied pic of Zunis on LAU-33s, MK-82s (two with fuze extenders) on the i/b pylon TERS and MERS with 2 Rockeyes on the o/b pylons) inspires me ;) White radome and shows the red devil on the air intake splitter which decal i have.

 

I will use 3 napalm cannisters (centerline MER).

I might use 3 Mk. 82's for the left TER and leave out the AIM-9B.

 

 

Rgds,

Duncan

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  • 1 year later...

20180909_194543.jpg.27a1c2813d84bb828c64100067586887.jpg

 

 

A very small picture of the F-4J I am working on...

 

 

A couple of questions I have to  ask one of you:

 

 

 

-When did the F-4J used green tinted windscreen glass?

During Vietnam?

 

-I am building VMFA-232, was does WT stand for?

Is it a name of a naval (marines) base?

---? The codes are squadron specific?

 

 

 

 

 

 

- The mk82 with long fuse, is it used for medium height?

What is the purpose of this long fuse?

 

 

 

 

 

 

 

TIA

Duncan

 

 

 

 

 

 

 

 

 

 

 

Edited by cag_200
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I don't know the Marine designations as well as I do the Navy ones, but I'm going to guess that the W designates the squadron as a west coast (Pacific) squadron and the T is the specific squadron, in this case VMF-232. That's different from the Navy where the N prefix designates a west coast (Pacific) squadron and second letter designates the air wing that the squadron is attached to. For example, NE would be CVW-2, and there would be a number of squadron that were part of CVW-2, all having the NE tail code. When a Marine squadron deploys to the boat, they usually take on the CVW's tail code for the cruise.

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As Darren says, at the time that codes were assigned, WT stood for VMFA-232. During the early years, some squadrons got new codes if they switched coasts. Then the Navy gave up on that, and no matter where a squadron went, the unit kept their codes. Marines deployed with both types of codes when they went on carriers, most of the time they matched the Code of the Navy air wing they were attached to,,,,,but, sometimes they just kept their own codes for the deployment on the ship. (and in at least two cases, they switched codes about halfway through the cruise, from USMC codes to USN CVW codes.)

 

The only "base specific" tail codes were back in the reserve days before the Reserve Air Wings were formed. At that time, the Marines at Glenview used 5V and the Navy used 7V,,,,the V stood for Glenview NAS,,,,,,then the codes got combined no matter if USMC or Navy (or those aircraft shared by both, but assigned to the base) 

 

The fuse extenders were so that the bomb would explode above the ground on impact, instead of burying the nose in the ground first,,,,,,,this was to create more shrapnel and was more effective against troops and trucks, etc.

 

 

 

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Oh and the general rule was not " A on the east coast and N on west" or "C on the east and W for the west for the Marines"

 

It was "A to M" on the east, and "N to Z" on the west, and applied to all USN/USMC squadrons, except for the "7V", "7A", etc type of squadrons, and the Training units (2A, 2B, etc),,,,for those, we had to just know which number and letter was assigned to which airbase/airfield/air station. 

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Interesting news, Thank you Guys for writing. Makes more sense to me now. The F-4s WV, WV...east coast. The CVW / aka base specific.

 

 

 

But why extended?

https://www.quora.com/How-do-impact-fuses-on-bombs-work

 

 

;)

 

 

 

 

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As mentioned so the bomb explodes above ground, if a non extended bomb fuze makes contact with the ground, the ground will absorb most of the blast reducing the effect. Of course there are times when they want to make holes in the ground, roadways, runways, etc and once they started coming out with radar fuzes which could be set to explode various heights above ground then fuze extenders went out of favour.  

 

Jari 

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Hi,

but why the use of this extended metal tube? I read something about vibrations/pressure which set the fuze to go off in the air (above ground).

So, this kind of bomb should be dropped at high-pass speed, low attitude?

The Tail Retarding Device will slow it down travelling towards ground target. The metal extended tube....must have effect on the fuze to go off?

 

Internet:

 

Developed for United States military forces in the 1950s, it was first used during the Vietnam War. The bomb consists of a cast steel case with 96 lb (44 kg) of Composition H6, Minol or Tritonal explosive. The power of the Mk 81 was found to be inadequate for U.S. military tactical use, and it was quickly discontinued, although license-built copies or duplicates of this weapon remain in service with various other nations.

 

Mark 81 Snakeye fitted with a Mark 14 TRD (Tail Retarding Device) to increase the bomb's drag after release. The bomb's increased air-time, coupled with its (relatively) forgiving safe drop envelope, allowed for very low-level bombing runs at slower speed. Used commonly in the close air support role in Vietnam (prior to wider availability of GBU-series precision ordnance). Nicknamed "snake", as in the typical Vietnam support loadout of "snake and nape" (250-lb. Mk-81 Snakeye bombs and 500-lb. M-47 napalm canisters).

 

 

 

hmm...why the purpose??  

- internet: steel casing with a unitary "cast ductile iron" warhead and reconfigured burst height

 

The BLU-82 produces an overpressure of 1,000 pounds per square inch (psi) (7 MPa or 70 kg/cm²) near ground zero, tapering off as distance increases. It is detonated just above ground by a 38-inch (970 mm) fuze extender. This results in a maximum destruction at ground level without digging a crater.

 

 

 

Edited by cag_200
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20180912_183830.jpg.90c59dbafb562cc0356d7ca69a57d818.jpg

 

 

Is this pylon (top one) from an F-4 or F-105?   I came across an old spare part...

 

I want to use the Eduard Brassin MER, for a 1/72 F-4J LATE Vietnam era.

If not, how does a center pylon looks like used on a F-4J?

 

 

 

Edited by cag_200
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