Identify indicator

[marcelo_malara]

I didn’t realize the shafts could be coupled while rotating. This makes sense, similar to what jet engines do when shutdown and restarted mid-air.

I’d imagine the revolutions would have to be closely matched to avoid damage, probably not undertaken lightly.

Yes, that is my doubt, it seems beyond the technology of the day. Nowadays this is done by a SSS Clutch.

https://www.sssclutch.com/en/how-it-works/

https://www.youtube.com/watch?v=rOT4O-l ... SSGearsLtd

[Herr Nilsson]

I've colored Hipper's clutch and I hope it helps to understand the mechanism:

They used a bevel gear to synchronise the revolutions of the turbine (blue) and propeller (yellow) shaft. In case of indentical revolutions the green part wouldn't rotate anymore (except the upper bevel wheel). The revolutions indicator (Gleichlaufzeiger) would stand still and the connection between the two parts of the shaft could be established by moving the red connecting sleeve (red) to the left.

[marcelo_malara]

I've colored Hipper's clutch and I hope it helps to understand the mechanism:

They used a bevel gear to synchronise the revolutions of the turbine (blue) and propeller (yellow) shaft. In case of indentical revolutions the green part wouldn't rotate anymore (except the upper bevel wheel). The revolutions indicator (Gleichlaufzeiger) would stand still and the connection between the two parts of the shaft could be established by moving the red connecting sleeve (red) to the left.

Thanks! Smart indeed. Do you have many original plans of German warships?

[wadinga]

Hi Marcelo,

Over the years Herr Nilsson has proved he has original source material beyond our widest dreams, and he releases a quantum every now and then for our amazement and enjoyment.

Even more enigmatically, sometimes he hints that he is constrained from allowing some of the most exciting to be better known.

All the best

wadinga

[Herr Nilsson]

@Marcello Malara

Original plans? No, not plans in a narrower sense.
On the whole I would estimate 1.5-2 m shelf space originals (operating manuals, building regulations etc.).

@wadinga

Thanks for the compliment, but this certainly overexaggerated.
There are so many wonderful small design and engineering details to write about, but like everything in life, it's always a matter of time...or better: the lack of it.

[marcelo_malara]

@Marcello Malara

Original plans? No, not plans in a narrower sense.
On the whole I would estimate 1.5-2 m shelf space originals (operating manuals, building regulations etc.).

@wadinga

Thanks for the compliment, but this certainly overexaggerated.
There are so many wonderful small design and engineering details to write about, but like everything in life, it's always a matter of time...or better: the lack of it.

Wonderful, a little like Gene Slover´s USN documents. I wish I could read German