X-tail pivot point

[redboat219]

Which one for a small boat like a 1/144 Trumpeter Soryu class?

[JHapprich]

I seriously doubt the location of the pivot makes any difference on such a small scale.

Why do you ask?

[Schmitty1944]

Whichever is correct for scale. probably Fig A. That one will be better for the linkage as it is likely in line with the WTC or pressure hull.

Jason

[redboat219]

I seriously doubt the location of the pivot makes any difference on such a small scale.

Why do you ask?

The X-rudders on the Trumpeter kit are molded in place. They need to be cut off and have control shafts installed. No idea how the real ones are articulated.

[JHapprich]

Go for "Fig.A" and don't tell anybody ;-)

[redboat219]

Aaaaaaaaaa

[CC Clarke]

Fig A follows your three-part mantra.

The angle of the ends needs to match the reference.

[Albacore 569]

Pay Close attention to your model subject too. X stern arrangements vary subtlety but significantly. The x stern on the German /Italian type 212's and the Israeli Dolphins vary a lot from the Norwegian Type 210 Ula boats, versus the Swedish boats. I guess like all curariform rudder stern planes do on most sub designs to sub designs. The Albacores (AGSS569 X tern (the first X stern) was off set. On the Norwegian Type 210 the Stern planes on all the models I have seen online are completely wrong. That sub, the X stern isn't 45 degrees but looks closer to 50 degrees! This because the cross over of the planes internally seems to pass over the centerline prop shaft and makes the X stern narrower - the planes don't extend out as far port or starboard. The 3 d models I seen online totally blow it making them the ubiquitous 45 degrees.

Most use all moving surfaces, but the bases are usually fixed to help water flow smoothly past into the propeller. Hard to get a good picture of the Ula in dry dock to illustrate my assertion. but here is one best I can fnd publicly.

This is some dry dock! Norwegian Navy. And some isolationist idiot in the United States claims NATO doesn't spend enough?