605 / Daimler-Benz DB 601 engines
The DB 605 was a development of the DB 601 and was
very similar in basic construction to that power
unit. The main improvements increased the maximum
Altered valve timing increased the inlet period
and improved the scavenging to give greater
volumetric efficiency at higher r.p.m.
A complete redesign of the cylinder block obtained
the maximum possible bore with existing cylinder
centres. The new design also repositioned the
spark plugs. The cranksahft big-end bearings were
CONSTRUCTION: Cylinder barrels of steel are
screwed and shrunk into the cast Silium-Gamma-alloy
cylinder blocks. These dry liners project beyond
block providing attachment by means of threaded
rings which pull the liners against the finished
face of the crankcase.
view of the Daimler Benz DB 601N.
Two inlet and two exhaust valves per cylinder
operated by rocker arms directly from a single
camshaft carried upon the head. Stellited valve
seats, exhaust valve sodium cooled, ball joints
interpose rockers and valve stems.
Forged light-alloy pistons have concave heads,
each piston has a floating pin and three
compression and two oil-scraper rings with one
below the pin.
Forked type connecting rods with serrated joints
at big ends, roller bearing at big end has three
tracks of 24 rollers each. Forked rod is keyed to
outside of roller race, plain rod runs on
lead-bronze bearing over race.
One piece forged steel crankshaft carried in seven
plain lead-bronze bearings. Eight balance weights
attached to crank webs, splined forward end to
receive splined sleeve of reduction gear pinion.
Deep light alloy crankcase with webs at main
bearings, tubular mounting at rear below
crankshaft for installation of cannon which can
fire through propeller shaft, light top cover.
Centrifugal supercharger on port side of engine
driven through a fluid coupling by a shaft at
right angles to crankshaft. This shaft is driven
through bevel gears from the crankshaft, variation
in propeller speed secured through variable
filling of fluid coupling by two-stage
enginedriven pump receiving lubricating oil from
the main pressure filter.
First stage delivers oil direct to coupling and
second stage delivery is passed in varying
proportions between crankcase and coupling by
piston valve controlled by a capsule which is
sensitive to inlet pressure. Second stage cuts in
at approximately 5,000 ft. and full delivery
occurs at approximately 11,500 ft.
Butterfly throttle which is capsule controlled
regulates supercharger delivery, second throttle
which is pilot operated controls air supply to
engine and manifold pressure, first throttle
subjected to pressure between two throttles,
increased boost for take-off controlled by
clockwork mechanism, mixture delivered by
supercharger to looped manifold by large diameter
pipe, dry-sump pressure-feed lubrication, gear
type oil pumps, spray of oil directed upon
reduction gears, main oil pressure line feeds
crankshaft bearings, secondary line feeds
supercharger fluid pump.
Scavenging pumps at rear end of camshafts, single
spur type propeller reduction gears, provision for
mounting controllable-pitch full-feathering
propeller, centrifugal pump circulates coolant
consisting of equal parts water and
Daimler-Benz DB 605
1937 (DB 600
1,475 (1,099 kw)
6.1 in. (154
mm) x 6.3 in. (160 mm)
2,179 cu. in.
1,663 lbs. (756