Evening Sunbeam,

I had a similar problem with my Napier Lion engine, no carbs, I was very lucky as I was able to borrow a cutaway set of carbs from a museum engine and re-engineer a pair, is there another Dyak that still has it’s carb’s ? could they be borrowed and copied ?

I would really like to see how you are going with the build.

Andy

Hi Powerandpassion, Alan and all,

Thanks for the pint, it was tasty, full bodied and fruity, just like the buxom wench !

Alan, the rocker arm assembly can rotate on its location before tightening the locking ring.

Andy

G-AAAZ was one of the sister a/c to G-AAAW that was scrapped at Old Warden in 1935, I have the Lion engine from G-AAAW

Andy

Morning gentleman,

Thinking a little more about the timing on the Lion engine and others, as one magneto supplies the spark for the inlet side and the other supplies the exhaust side of the cylinders, maybe there is a slight difference in the charge density from on side to the other and this changes the burn time to end up with a central expansion ?

This is a section of an early Lion engine.

Andy

Mornin P&P,

On full advance the Lion Va fire’s at 40 BTDC on the exhaust side magneto and 45 BTDC on the inlet side magneto, the Magneto’s are BTH AV12’s.

https://www.youtube.com/watch?v=-FyHOXJp7YQ&index=24&list=PLDRCGAMcnKEgf4AV_Cm0lEC4vXsQEoz8f

There is plenty of starter magneto spark capability as on a couple of occasion’s I have started the engine with the main mag’s switched off and as long as I carry on turning the starting handle shaft to drive the starter mag the engine runs well.

Andy

Evening all,

The engine that Merlinpete refers to was sold at an auction in Staffordshire in 2008, this is a photo I took on the day,

Sorry I don’t remember who the winning bidder was.

Andy

It looks very much like a modern vehicle wheel hub or drive flange to me, it even has the smaller hole to fix the brake disc on ?

Andy