Hello NP317,
Great work with your Heisler!
There is on more severe advantage using stainless steel for the jacketing: Thermal losses by radiation will be reduced a great deal due to the reflecting inner side of the jacket
Experience with both my locos which are equipped with boilers and jackets made of ss are showing this effect
Jack,
Please think once more regarding plans to use the tiny handrail tubes for electric wires. Even using teflon insulated wires won't make it an easy job to insert them in case there are any bends in those handrails. It might be almost impossible to change those wires In case of troubles!
With my DB class 44 I inserted wires into such tiny ss tubes (2.5 mm) to meet the prototype. Wires broke at (leaded) connections after some time and needed replacement
. Impossible to draw or shift them through (bended) tubes!
Please watch the photo which is showing such connection in repair.
I would recommend to hide the wires under the running board ore else (next time).
Best regards
Asteamhead