what's this anti-aircraft rocket launcher？

[linkoping]

looks like a mixture of flak tripod and w.Gr.28 launcher

 

[Grzesio]

There has been no positive ID since the clip surfaced 15 years ago or so (Ordway identifies a photo the rocket as the Maikaefer in his book, but he is not too reliable) - but it clearly looks like the Stoelzel launcher, just with two rockets instead of four.

 

[Michel Van]

could this be Rheinmetal-Borsig RZ-100 ?

Source:

https://www.secretprojects.co.uk/threads/21cm-maik%C3%A4fer-flakrakete-42.39748/

 

[Grzesio]

Yes, that's the photo from Ordway's book.
The rocket is way too small for the RZ 100, which was of 42 cm calibre and around 700 kg heavy.

 

[Michel Van]

The rocket is way too small for the RZ 100, which was of 42 cm calibre and around 700 kg heavy.

Looking again on picture those rocket could be around 21 cm calibre.
That would same as Nebelwerfer 42 - 21 cm calibre
but this projectile don't match the Nebelwerfer rocket.

 

[Grzesio]

If we assume, the guy in the bright suit is 170 cm tall, the rocket calibre is around 28-29 cm. What again perfectly fits what we know of the Stoelzel launcher.

 

[Newtonk]

This is 38cm RGT Raketentauchgeschoss an anti-submarine rocket that was later used in the Sturmtiger. The rocket was deployed in the form you see here at Altafjord, Agdenes and Trondheim, and possibly elsewhere.

I asked on a modelling site I frequent.

 

[Grzesio]

No, it's not. It is a little bit similar in overall shape indeed, with a slight boattail, but it is significantly smaller than the 38 cm RTg, has much slimmer nose and no six protruding nozzles visible in the centre at the rear. Than, the 38 cm RTg were launched from a closed rifled tube with gas venting, not from an open launcher.
This is a heavy, short range antiaircraft rocket with blast effect, what is clearly visible during test firings shown in the film from which the stills come from. Its calibre is around 28-30 cm and the launcher, manned by one layer, is equipped with an optical rangefinder.
There was such a weapon built an tested in Peenemuende in 1943.

 

[Newtonk]

Tha is for the clarification, Grzesio