Engines > From Kits/Castings
The Alyn Foundry IF Allman engine.
Jasonb:
--- Quote from: Alyn Foundry on August 22, 2018, 07:17:19 PM ---
It took me two days of time to finally get a single chuff. The reason? Mr Allman hadn't realised that the piston would cut off the passage to the ignition tube due to his " special " spherical combustion chamber design.
--- End quote ---
Or was it that Mr Corry did not look closely enough at the Patent drawings particularly items "b" and "c" :LittleDevil:
Look forward to the video.
Jo:
You mean the small igniting-port b and the feed groove c.
The original pretty gear arrangement looks interesting on the engine :)
Jo
Jasonb:
Gearing is simple enough, just need the main bearing castings so I can get crankshaft height and that will allow me to work out where to place the pivot for the larger gear.
Jo & Andy, do you have 22DP cutters or would it suit to go with the more common 24DP and add a couple of teeth?
Alyn Foundry:
Touché. :)
Jo, I take it you like the rather " coarse " tooth form depicted in the patent drawings?
As you're aware a finer tooth count helps with valve timing but this engine is pretty forgiving as there's masses of adjustment available.
Jason, the sun has appeared but my son has disappeared, MOT time. Fingers crossed for a video later on.
Cheers Graham.
Alyn Foundry:
Jason, try these!! :LittleDevil:
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