005”.ģ/ Turn camshaft in direction of rotation until clearance is taken up.ĥ/ Check by turning engine in direction of rotation and noting position in degrees point when inlet valve just begins to open.Ħ/ Tighten and lock the driving wheel retaining devices. Worm Gear :- ġ/ Turn crankshaft in direction of rotation to 20° before T.D.C.Ģ/ Set clearance on no.1 inlet valve to. Dual Ignition :- gives quicker flame rate. Flame Rate :- time taken for mixture to burn. of degrees measured on the crankshaft by which a valve opens before TDC. Exhaust :- Piston goes up, forces gas through outlets. Compression :- Piston goes up, compresses mixture. Induction :- Piston goes down, draws in mixture. The scavenging pump has larger mesh than pressure pump to keep sump empty. VOL III } List of spare parts, contains a checking list.Ģ/ Dry Sump :. Part II } Fits, Clearances & Repair Tolerances VOL II Part I } General Orders & Modifications Self-lubricating from oil it pumps.Ī wet-sump has its disadvantages:- the oil never gets cooled properly. Outlet pipe is small than inlet so pressure is built up. Oil is drawn in by suction caused by rotating cogs. Opens at pressure of 45 lbs.Ī by-pass valve in filter opens when filter clogs up, and the dirty oil is carried round engine, which is better than none. Įxcessive pressure forces spring open and oil escapes to sump. Aerobatic Screen prevents oil flooding cylinders when ‘plane is upside down.
Cover with fitters blue and rub on surface table, then scrape of high spots.įilter gauze cleans oil as it drops from pistons into sump. Also a sump is needed, bolted under the crankcase with an oil-tight joint between. An oil pump is needed to lubricate by pressure. In this type some parts are lubricated by splash and others by pressure.
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