HMS Holland 1 - 3D CAD model in the making

[Subculture]

I beleive the periscopes on the four boats were all slightly different, certainly differences between Holland 1 and Holland 5, the latter I believe got the first one.

Here's an image of Holland 1 periscope base.

[DrSchmidt]

That's an awesome foto which would have saved me quite some time. So I might redo the cowling again....that's my current version:

[Subculture]

Got it from this website

https://www.nauticalarchaeologysociety.org/holland-no5-submarine

[DrSchmidt]

Closer....

[Subculture]

Here is a side shot of Holland 5. Unfortunately this boat is now on the sea bed covered in marine growth, so not the greatest for reference. The Rn submarine museum in Gosport may be able to give you some additional reference.

[DrSchmidt]

I British gentleman shared his research material about the Holland 1 with me and I got plenty of photos of the current Holland 1 at Gosport. Unfortunately they didn't cover the periscope dome in good detail. But that issue is fixed now due to your help. Thanks for that....

I found another photo that is a riddle to me....

https://www.alamy.de/projektleiter-ron-houghton-und-wartungspersonal-len-taylor-restaurieren-holland-1-grossbritanniens-erstes-u-boot-im-u-boot-museum-in-gosport-hants-die-holland-wurde-1901-in-betrieb-genommen-und-70-jahre-lang-versenkt-bevor-sie-errichtet-und-restauriert-wurde-27-februar-1994-foto-von-roger-bamber-image615128313.html

It shows Holland 1 with a restored interior. That's definitely not the current status of the boat and I couldn't find any additional info. So I'm wondering if they tried to restore ist and had to undo all of it again because of preservation purposes. The long time in the salt water didn't do the metal no good.

[Subculture]

It was like that when I visited the Gosport museum about fifteen years ago.

A lot of the corrosion happened after it was removed from the sea bed, as the boat was kept outside. After a few years it became evident the boat was at risk of dissolving into rust unless something was done, and subsequently the boat was encased in a sealed pod and treated to remove all salts out of the steel. It stayed that way for several years before it was removed and located in a custom built building with humidity carefully controlled.

The Hollands were built from a higher grade of steel than other vessels of the day called s-grade. This may be a factor in their longevity on the sea bed.