Os-engines 61VF Bedienungsanleitung PDF herunterladen

O.S. MAX-61VF

INSTRUCTIONS FOR O.S. MAX 61 VF ENGINE

The O.S. MAX-61 VF is a high performance engine that has been

developed expressly for FAI type R/C contest models. It em-

ploys schnuerle scavenging and a rear exhaust port to facilitate

the installation of a tuned silencer system, especially where the

latter

built

into

the

fuselage.

This engine features specially developed ABC type piston/

cylinder construction and a 17 mm O.D. crankshaft of heavy

duty alloy steel in order to provide extra power and durability

and is equipped with an O.S. Type 7D carburettor, specially

designed to give good throttle response.

Modern precision machinery and carefully selected top-quality

materials are employed in the manufacture of this engine to

ensure consistent performance and long life.

SPECIFICATIONS

Displacement

Bore

Stroke

Practical R.P.M.

Power output

Weight

9.95

c.c. (.607 cu.

in.)

24.0

m.m.

(.945

in.)

22.0m.m. (.866 in.)

2,000 ~ 17,000 r.p.m.)

1.8 PS (17,000 r.p.m.)

528 g (18.6oz.)

INSTALLATION

Mount the engine securely on rigid hardwood mounts or metal

bearers. For highest performance and safe running, we recom-

mend that the bearers should be as heavy and as rigid as possible.

Make sure the engine bearers are parallel and their mounting

surfaces are in the same plane. Use 4 m.m. or 6—32 steel screws,

such as Alien type, with locknuts, for bolting the engine to the

bearers.

RUNNING-IN ("Breaking-in")

The special ABC type piston/cylinder construction, two ball

bearings, bronze bushed connecting rod, etc., enables this engine

to be operated after a shorter running in period. Preliminary

bench running can be omitted. However, for long life and peak

performance please observe the following procedure:

Install the engine in your model and fly it with a rich needle-

valve setting so that it runs at a fast '4 stroke' for the first two or

three flights. Then readjust the needle valve for a slightly less

rich mixture (i.e. at a reduced speed '2-stroke') for the next four

to six flights.

FUEL

Use a good quality commercial fuel or one of the fuels shown in

the table. "A" is suitable for general use. If higher output is

required, fuels containing 10 to 20% of nitro methane; (e.g."B")

may be used after running in.

Lubricants can be either castor oil or synthetics provided that

they are always of the best quality.

Methanol

Castor Oil

Nitromethane

77%

23%

57%

23%

20%

1 2

O.S. MAX-61VF 1
PARTS LIST 2

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Seite 1 - O.S. MAX-61VF

O.S. MAX-61VFINSTRUCTIONS FOR O.S. MAX 61 VF ENGINEThe O.S. MAX-61 VF is a high performance engine that has beendeveloped expressly for FAI type R/C c

Seite 2 - PARTS LIST

GLOW PLUGSince the compatibility of the glow-plug and fuel can have a con-siderable effect on performance and reliablity, it is suggestedthat the user

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