Sunday, February 21, 2010

Development of the Imperial Japanese Navy Battle Cruiser (Part 9)



Showa9,
The torpedo ship 'Tomoduru' was capsized by the sea of stormy weather during training.

'Tomoduru' is the ship which the Fujimoto shipbuilding official designed.

'Loading weight on a deck can be enlarged, so that the numerical value of the width/draft of a hull is large.'

Fujimoto had established this theory, when young.

This was new discovery on the theory of shipbuilding.

If it says simply, If it designs according to his theory, many arms can be carried by the hull of the same size.
This is 'Flat bottom form' theory.
The imperial navy appointed this theory to be a military secret till end of war.

The early destroyer of high free board built by this theory, and was maintaining stability.
As a result, the upper division of a navy has demanded reinforcement of arms.

And since this request is met, a design side does its best in extension of arms.
And, as a result, draft became deep and the ship of low free board has been done.

The ship of the flat bottom had the large inclination as compared with the conventional hull.
However, it surely restored and was not capsized.

But, there was a blind spot that nobody notices in this theory.
That, when a hull inclines, a wave overcomes a deck. In this case, the stability of a hull is lost rapidly.
A ship will be capsized in an instant.

This is a strange blind spot. The capsize of torpedo ship 'Tomoduru' was this case.
The navy starts check of the stable ability of all naval fleets.

*
The torpedo ship of the imperial navy is the meaning of a small destroyer.
'Tomodoru' was 550t in displacement and there were 111 crew members.

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