Hello everybody,

then let’s go to the prototype of the small Vertical Transportation Tie-down Lug Plates.  

If you look closely, you can see on this photo from the STS-130 that the Hold-down plates consist of three parts (have a look at the zoom on the right edge of the photo), a middle part with a narrow lower extension and two slightly smaller welded-on side parts to stabilize the opening without this extension.

Source: NASA (STS-130)

While I used Styrene (0,2 mm) for the side parts, the middle part seemed a little narrower to me at first, so I used Styrene (0,13 mm ). However, in the zoom of this shot it looks as if the three parts are of equal thickness, which is why I will then use Styrene (0,2 mm) uniformly.

Since it is difficult to cut out this narrow strip without perhaps cutting it off, I first made the two side parts and drilled the holes with 0,5 mm.

Then I glued a side part to the center strip, have drilled through it too,

and then glued the other side part to its back.

Then I cut out the curve of the middle stripe and rounded it off and only then carefully separated the remaining stripe up to the lower extension, which I actually managed to do, even though it’s only 0,5 mm wide.

In this configuration, the thickness of the Hold-down plate is approx. 0,5 mm.

And at this point of the canister, this first of four plates will later be glued.

For scratch-building the Support plates, I first marked the exact positions of the Hold-down plates on the floor plan of the transporter,

whereby I first realized how small all will be,

if you imagine that for the Support plates with the Hold-down clevises only approx. 1,5 mm space is available under the canister.

But I’m going to take it easy now and first look at the resulting sizes of the individual parts, then we’ll see. 

Therefore keep cool, scaremongering shall not be considered!

Source link