Sisson Triple

[gondolier88]

D!esel and petr0l also might work.

Greg

[MGMarine]

Thank you for the explanation, though I didn't think the usual name (honouring a German Doctor, sorry, Doktor?) for a non-spark-plug suck-squeeze-bang-blow engine was classed as an expletive. However, we live and learn. What a complicated world! Sisson Triples were so simple - but not low-tech in their day. How about a smiley -

[gondolier88]

Perhaps to soothe the injustices bestowed upon D!esel it's a comfort to know that the Crossley family (of said engine fame) chose to power their launch with a Sissons Triple....! That is worth a smiley

Greg

[andym]

This is an open front engine and the crank will be rotating up and over towards the operator in AHEAD rotation. Engineer will be situated on the stbd side of the boat. Drive looks to be LH end via coupling and a barring boss is fwd RH end. This places the crosshead load directly on the guide face closest to the centre line of the engine, which is sensible. If the engine rolls better the other way, there is an issue with valve settings. Crosshead loads in ASTERN are the opposite and bear on the back face of the guide with the load transferred indirectly via the fastening bolts.

This engine has radial valve gear, but if the engine had Stephenson reverse, a propulsion engine usually has the ASTERN eccentric rod top end offset. (A double ended ferry engine and a winch engine may have both eccentric rod top ends offset.) Radial valve gear design does not favour Astern or Ahead.