Just thought that I would share the photos of a Daimler Sleeve Valve Engine rebuild.
I have not carried out a full mechanical restoration as there have been some cost limitations.
The engine is about 1925, it has two sleeves per cylinder as opposed to the more common single sleeve found in many aero engines.
Each cylinder is topped by a single head. This provides a sealed top "cap" and locates the sliding sleeves.
The head has a large piston ring known as a "Junk" ring, this name being carried to the head also.
Each sleeve is operated by a small con rod connected to a small crank in place of the more familiar camshaft.
As the exhaust and inlet sleeves operate, they uncover their respective ports.
Lubrication is given by a finger pump delivering oil into dip trays which accept the scoop at the bottom of each con rod. The oil also throws up into galleries for the main bearings, There is no oil pressure feed.
Sleeve valves are particularly prone to heavy oil burning, giving significant smoke trails. The dip tray on this engine neatly connects to the throttle to allow it to cleverly rise and fall to regulate oil delivery ie. the full throttle, "up" position allows the con rod scoop to collect more oil than when the tray is in the "down"..idle position.