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the pictures aren't interesting
Thank you very much for adding those pictures Graham, the family resemblance and development of the governor from the horizontal engines is there to see, my thanks to Geoff.Is the engine featured fuelled with petrol? I reckon that is the case because it doesn't have two valves on the inlet side?I can't increase the size of the image of the open crank vertical enough to see the detail of the governor for those earlier engines which have the trigger block positioned 'outboard' whereas the trigger block is inboard between the inlet and exhaust valves in these latest photos. I'll certainly consider whether I can use a spring to control the trigger (not sure of the correct terminology) but it might have to be a hybrid depending on how the essential components can be mounted on the Retlas castings. Perhaps I'll complete the engine as per the plans and get it running before I try enhancements that copy the original engines.I will make the stirrup and tension spring for the exhaust valve, that will look good.Andy
Hi Graham, after yet another look at the photos of the original Gardner vertical inlet valve chest, I reckon the positions of the gas and inlet valves are reversed on the Retlas, what do you think? The big end bearing also looks different to me, the original appears to be steel throughout probably with bronze shells rather than the large bronze block used in the Retlas plans, could that be due to the National Gas Engine influence as per the studs going through the rebate in the main bearing caps? Reckon I'll make a con rod with a steel cap and bronze shells like the Gardner '0' type model.Andy