Argus As 10

Argus As 10
	; Argus As 10
Type:	V-engine , hanging
Design country:	German Empire
Manufacturer:	Argus Motors Company
Number of pieces:	more than 28,000

The Argus As 10 is a historic aircraft engine made by Argus Motoren Gesellschaft in the 1930s.

construction

The As 10 is a hanging ( crankshaft up) eight-cylinder V-engine with a 90 ° bank angle. The crankcase is made of cast electron . The four-cranked crankshaft has five bearings; two connecting rods each engage in a crank pin . Since the right and left cylinder banks are symmetrical, a fork connecting rod and a single connecting rod that reach into the fork are used for each crank pin. The pistons were manufactured in series production using the permanent mold casting process and have three compression rings and an oil control ring. The cylinder heads with one inlet and one outlet valve per cylinder are made of cast aluminum .

The hanging valves are actuated by a central camshaft with five bearings via tappets , push rods and rocker arms with roller bearings . The camshaft is driven by spur gears . The valve train is completely encapsulated and oil-tight.

Two backflight compatible SUM 729a or 730a are installed as carburettors . The dry sump lubrication system is equipped with a pressure pump and two suction pumps (in the cylinder heads) and can be expanded with an oil pump for inverted flight suitability. Three coarse filters and a slotted filter are provided for cleaning the oil .

The aircraft-standard double ignition system with two magneto igniters and two-stage electrical adjustment of the ignition timing came from Bosch . To start, the ignition is set to "late" (ignition after overcoming top dead center), which prevents the engine from kicking back in the event of a misfire and allows the engine to start better. After starting, the system switches over to advance ignition immediately.

The engine is started either via a manual starting device (hand crank) or a compressed air starting system . A Bosch starter for a 24 V direct current electrical system was also available as an option.

Today's meaning

Only a very small number of Argus AS-10 motors are currently in use. There are probably less than ten of them worldwide, three of which are used in the German Messerschmitt Bf 108s that are still flying and two in the airworthy Fieseler Storch . How many potentially restorable engines are still in museums or privately owned cannot be determined. The few surviving vintage aircraft with an original Argus AS-10 engine are still occasionally shown at air shows.

Technical data As 10 C

Argus As 10 C

Characteristics

8 cylinders in V-arrangement, hanging, 90 ° cylinder angle, Otto four-stroke, air-cooled
Compression ratio 6.9: 1
Bore × stroke: 120 mm × 140 mm
Total displacement: 12,667 cm³
Starting power: (5 min) 240 PS (176 kW) at a speed of 2000 rpm
Emergency power: (30 min) 220 HP (162 kW) at an engine speed of 1940 rpm
Travel power: 200 HP (147 kW) at an engine speed of 1880 rpm
Cylinder power: 30 hp
Displacement Power : 18,95 PS / l
Power-to-weight ratio : 0.89 kg / hp
Piston Load: 0.265 PS / cm³
Installation weight: 232 kg
Fuel consumption petrol (min. 78 octane ) when cruising: approx. 60 liters / hour
Maximum propeller diameter: 2300 mm
Firing order : 1-5-4-8-7-2-6-3
Direction of rotation of the crankshaft: right
Reduction gear : no
Maximum cylinder temperature: 285 ° C
Idle speed: 350 / min
Speed limit for one minute of throttled dive: 2600 / min

Technical data As 10 E

8 cylinders in V-arrangement, hanging, 90 ° cylinder angle, Otto four-stroke, air-cooled
Compression ratio 6.9: 1
Bore × stroke: 120 mm × 140 mm
Total displacement: 12,667 cm³
Maximum power: (1 min) 270 (198 kW) PS at a speed of 2100 rpm
Starting power: (5 min) 240 PS (176 kW) at a speed of 2000 rpm
Emergency power: (30 min) 220 HP (162 kW) at an engine speed of 1940 rpm
Travel power: 200 HP (147 kW) at an engine speed of 1880 rpm
Installation weight: 232 kg
Fuel consumption petrol (min. 78 octane) when cruising: approx. 60 liters / hour
Maximum propeller diameter: 2300 mm

The increase in performance of the E version compared to the C version is achieved through a larger air passage cross-section in addition to a larger jet in the carburetors .

Technical data of the As 10 C in detail

Installation dimensions:
- Length, large (without hub): 1105 mm
- Width, gr .: 880 mm
- Height, gr .: 718 mm

Fuel:
- Octane number: at least 78
- Fuel pressure: 0.12 to 0.2 at

Lubricant:
- Summer: Aeroshell Schwer / Stanavo 120 / Grünring
- Winter: Aeroshell Schwer / Stanavo 100 / Rotring
- Lubricant pressure: 3–6 at
- Lubricant content: 3.5 l
- Inlet temperature: up to 85 ° C
- Outlet temperature: 97 ° C
- Heat dissipation 2.9 kW (2500 kcal / h)

Weights:
- Dry weight: 213 kg
- Installation weight: 232 kg

Center of gravity of the engine:
- behind propeller trailing edge: 545 mm
- under crankshaft center: 128 mm

Lubrication:
- Dry sump pressure lubrication
  - a pressure pump
  - two suction pumps in one housing
  - three coarse sieve filters
  - a slit fine filter

Starter:
- Kickback-proof, automatically engaging Argus hand turning device
- Compressed air 20 bar or electric Bosch crank starter

Crankcase:
- five-part
- Made of tempered electronic casting
- double bearing walls make it particularly flexible and torsionally rigid

Crankshaft:
- cranked four times, with screwed on counterweights
- Drop-forged from tough tempered special steel and machined on all sides
- five lead bronze crankshaft bearings in steel shells

Connecting rod:
- Fork and center connecting rods with H-section
- Drop-forged from tough tempered special steel and machined on all sides
- Connecting rod bearings made of lead bronze in steel shells

Piston:
- Cast from special aluminum alloy in a permanent mold
- three piston rings
- a lubricant wiper ring
- floating piston pin

Cylinder:
- Bushings made of hardened and tempered special steel, drop forged
- Cylinder heads cast from a heat-resistant aluminum alloy
- Outlet valves made of special steel
- Inlet valves, valve guides and spark plug seats made of bronze

Control:
- Valve stems hardened by nitriding
- Exhaust valve carrier with hard metal coating

Carburetor:
- two SUM carburetors
- Model 729 and 730 with mixture control and inverted flight system
- Mixture preheating by exhaust gases

Fuel delivery:
- a mechanical JUMO double fuel pump (size 2) with automatic pressure control

Ignition:
- two Bosch ignition magnets with electrical two-stage adjustment of the ignition timing and snap-on coupling
- two spark plugs per cylinder, thread M12 × 1.25
- Interference suppression of the entire ignition system

Cooling:
- Air cooling with special cooling air duct
- Cooling air flow through the partly double-walled crankshaft housing through cooling air ducts below the crankshaft bearing shells

Propeller hub:
- Rupp flange hub for fixed propeller or type-specific hub for adjustable propeller

Auxiliary drives:
- two free drives with flange connection on the rear cover for any attachment of:
  - Power generator
  - MG control
  - Inverted flight lubricant pump
  - Oil or air compressors

use

Arado Ar 66
Arado Ar 76
Arado Ar 77
Arado Ar 96 A
Fieseler Fi 156 "Storch"
Fieseler Fi 256
Focke-Wulf A 43 "Falke" (later called Fw 43)
Focke-Wulf Fw 47
Focke-Wulf Fw 55
Focke-Wulf Fw 56 "Stößer"
Focke-Wulf Fw 58 "Consecration"
Focke-Wulf Fw 186
Gotha Go 145
Gotha Go 147
Gotha Go 149
Heinkel He 74
Henschel Hs 121
Henschel Hs 125
Hoarding H VII
Terminal Kl 36 B
Terminal Kl 151
Messerschmitt Bf 108 "Taifun"
Messerschmitt Bf 163
Messerschmitt Me 208
Mráz K-65 "Čáp"
Sack AS-6 "Flying Beer Coaster"
Siebel Si 201

literature

Operating manual Argus As 10 C, series 3, (1937)
Messerschmitt AG works brochure (French language, printed in Germany, 1939)
Airplane type book - manual of the German aviation and accessories industry. Born in 1939/40

Web links

Commons : Argus As 10 - Collection of images, videos and audio files

Individual evidence

↑ Handbook ARGUS aircraft engine AS 10 C series 3. 2nd edition with supplementary sheets added later to compare the changes AS 10 C to AS 10 E, Berlin 1937.

[1] Handbook ARGUS aircraft engine AS 10 C series 3. 2nd edition with supplementary sheets added later to compare the changes AS 10 C to AS 10 E, Berlin 1937.