[Szybowski]

Hello McBeck

It was fantastic to see some new pics of what is going on in Peter Madson's shop.

It looks like he is using a little different ring bracing structure to support the main pressure hull in the UC3 then he used in Kraka and what we see in the Euronaut. The Euronaut used rolled I-beams which is a very practical way to get a strong ring quickly with allot less welding. I don't like welding around the corner anyway. I was thinking of doing a design on my sub much like what I see Peter is doing on the UC3 but I liked the idea of not having to cut up large panels of steel for those flat vertical sections of the rings then trying to use up the scraps else were.

I think the I-beam design is stronger but I was concerned about rust and condensation between the welds holding the I-beam type ring onto the outer hull? As you know if you don't design a sub to be able to reasonably deal with rust in saltwater you'll pay for it later. I see Kraka is already needing some rust work. Do you know what kind of primer and then paint Peter is using on the outside of Kraka? Also I would love to know what kind of steel he is using on the rings and the outer hull as well as the thicknesses if you could ask him?

More later

Cheers