[mike@af]

First question, The only similar engine I know of is in the Ford Vicking Snap Together kit by Testors I believe. Its not that hard to scratch build one if you can get some dimensions.

Second question, no, polyester putty would not be suitable for building pillars. I would using a combination of brass and styrene. Use the brass as the strength of the structure and then styrene over it to give it the detail and proper shape.