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Any Info Available on the MA-4 1.5" Folding Fin Rocket??

ordnance

Well-Known Member
Premium Member
I can't think of another item I've had that appeared so "standard" but seemed to be missing from every reference manual I've seen. The example without a warhead has been in my collection for a number of years and I recently had the opportunity to photograph it next to a complete one a friend has.

The warhead seems to be made of a die-cast material and may be a practice type or?? There are small rollers behind the warhead that appear to help guide the rocket down the launch tube with less friction. The fins tip outward similar to a LAW rocket but are not spring loaded.

My friend with the complete rocket is an aircraft buff and thought these were used in the F-89 as an anti-aircraft rocket prior to the development of guided missiles like the AIM-9. Supposedly, these were used in a launcher holding a large number of rockets, perhaps 80 or 90, and fired like a shotgun against enemy planes. The term "Mighty Mouse" was suggested, although I've heard that name applied to the early 2.75 FFARs of the late 1940s and early 1950s.

I thought it was odd that they were dated 1955, well after the larger and more potent 2.75" rockets were in development. Then again, if these were truly intended for anti-aircraft use, and not for air to ground use, then we are talking about two completely different animals. As you can see, they carry very standard looking markings from North American Aviation with the designation "ROCKET, AIRCRAFT, FOLDING FIN, 1.5", MA-4"

To further muddy the waters, the seperate fin assembly is a similar but different item too. Its fins are nested in milled slots but tilt out the same way as the 1.5" version. However, it is 2" in diameter and is also unidentified.

Any old Air Force EOD guys out there that recognize these little rockets? Can you point me to a published reference on them? Thanks for any help you can offer.

Rick



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Hi ,

An interesting item. I've never heard of these before either, but the configuration is very similar to the British 2" aircraft rocket, used into the '70's.
The 2" fin assembly is also similar to the British version ,except that one had a 'waisted' body,the base looks to be the same.
It could be a sub cal trainer(?) for aircraft rockets fired from launchers , similar to the 2.5"SCAR zero length/rail launched trainer.
Or just a step in development of what was the trend in the '50s to massive salvo firing of aircraft rockets, ie,many small calibre or a few larger cal.
Also in the '50s, Rocket armament was also intended for air to air fighting, particularly against bombers.

cheers
Bob
 
Hi
(sorry for my English)
Very interesting thing! I read in some publications about U.S. 1,5” fin stabilized rockets, but first time see one.
According to F-89 armament, one of developed weapons for this plane was a “rocket gun”, an automatic rocket launcher working similar to machine gun. One of such guns was T132 cal. 1,5” (38 mm). But it shot spin-stabilized rockets, without fins. Here’s a picture of 38x210 ammo (from IAA forum): http://iaaforum.org/forum3/viewtopic.php?f=8&t=9365&start=0
But there is other possibility. I read somewhere about North American F-86F Sabre prototype, called NA-210. with rocket-only armament and it was probably 1,5” FFAR. You can see this picture here: http://f-86.tripod.com/f86list.htm (search NA-210), mistakenly described as 2,5” rockets, but evidently looks smaller).
About 2” rocket I found only this short info, on Andreas Parsch website: “Gimlet: 2-inch (50.8 mm) air-to-air and air-to-surface rocket, which was tested by the U.S. Navy in the 1954/56 time frame. A version for the USAF was also developed.
(Here http://www.designation-systems.net/dusrm/app4/other.html is a photo of launcher)
 
Looks like something along the line of the German R4M. Seems the idea was remodeled a bit and launched again.
 
Thanks for the replies to the thread so far. Some good areas to look but I still don't think we have a solid answer yet.

After posting last week I wrote a friend at the Air Force Museum in Dayton to see if their aircraft armament specialist could identify it. So far, no luck. I just recieved word that they had passed the request on to the Aircraft Armament Museum at Eglin AFB to see if they knew anything. I'll report back when something is heard from them.

The folks at Wright Patterson also suggested I contact the people at the North American Aviation Employees Association to see if they might put the question in their newsletter. That will be another job for this week. So the search goes on.
 
Could you weigh these 1,5" 's, with and without warhead? By difference between them, you also can get the warhead weight. Of course it is inert, but it's weight must be equal, or very close to the real "live" warhead.
 
Speedy,

I can weigh the one I have, without the warhead, but the complete one is about 150 miles away in another State. They were only together for about 15 minutes one afternoon last October.

No more news from the Air Force yet but I'm still hopeful.
 
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