Not much info here but here's some thoughts...
I am considering the following scenario.
1) Open the shaft coupling, and remove the aft-facing half of the coupling. Slide a gear over the shaft, and re-attach the motor coupling to the shaft. Re-attach the two halves of the coupling together...At this point you have a spinning gear tooth on your prop shaft.
Thought: Just install a toothed sprocket permanently. Lot less to deal with under adverse conditions.
2) Now, in parallel to the shaft, install an electric motor that pivots/tilts inwards towards the shaft and engages the gear.
Thought: just go with a chain drive that the motor could be permanently mounted. Possibly to regen electricity during the "steam" time.
3) In case of main power plant failure, you just undo the motor coupling, pivot in the electric drive, and the prop shaft now turns through this gear system....Or maybe the backup electric motor is coupled to the gear on the prop shaft via chain/belt?
Thought: Ya chain/belt, Chain would be better so that you didn't have resistance from tension on a belt.
The reason for all this is that the main power is a steam engine and if it stops operating, I'm considering a backup electric drive system. There is no opportunity to simply drop a Torquedo outboard alongside the hull (round fantail)....sound plausible or just too weird?
Hell your playing with electricity in a boat, how much weirder can you be??? :o)
Steve in Solomons MD
Lagoon 410 SE
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