Hi there,
but before I start fully in the
SSWS chapter again, I wanted to see how a new test with the stack and the 1:144 TSM's will look like in order to check their location next to the
SSME exhaust hole.

After my first emergency surgery to widen the
SRB exhaust holes to 1:144, I had thought of not having to change the SSME hole. But then I made my decision, to build the
TSM's 1:144 too and have started the tricky job with the PE ladders and
ROFIs what had distracted me from the scale problems a little bit.

Now I have made a new test with the stack and the larger TSMs (1:144) and see for yourself first, what it looks like now ...
First, the sight of the stacks on the MLP is quite impressive again, I think.





With something closer inspection you can see that the TSM's wandered slightly outwards and forwards, representing each about 4 mm.

In the provisional arrangement I went out thereof, that should be approximately 10 mm space between the TSM hoods and the orbiter for the two
T-0 umbilicals. These are the fold-out "connector plugs" for the media supply of the orbiter during the countdown to lift-off, which can be seen nicely in this top view.
Source: NASAIn the rear view the displacements become even more significant.


And here again, both views without the stack for better overview.


And now it is clearly seen that the two TSMs are too far next to the exhaust hole, so that there would be significant problems in laying the SSWS pipes around the hole, especially in terms of optics if you look at the next picture. This would then probably have a somewhat strange running of the lateral pipes below the service flap box.

Source: NASAAnd if I imagine this sight, I know that I would not like and for better or worse I will have to widen the SSME hole at about that 4 mm on both sides. This arrangement corresponds then on the width and the location of the TSM's exactly the geometry of the 1:144er hole arrangement, and that will be okay. Then the TSM's standing right next to the hole, where they belong, and with the shorter length of the hole to the front I have to live.

So then let's go to the 2nd emergency surgery, which I hope will not be quite as cruel as the first one.

And for that, please press all available thumbs!