Saito FG-57TS Operating Instructions Manual

Thanks for buying SAITO FG-57TS 4-stroke gas-engine
exclusively for model airplanes.
In order to avoid misuse, please be sure to read well this instruc-
tion manual carefully. If there should be any deficiency, inconve-
nience, etc. concerning the manufacture, our company will
repair them with responsibility.
Any failure or trouble caused by unnecessary disassembly,
modification, or other uses than those provided in the instruc-
tion manual is not subject to the warranty, however.
Moreover, all responsibilities for the use of the engine, and other
obligations and responsibilities based on laws, regulations, etc.
are borne by the purchaser and the user, and
SAITO SEISAKUSHO CO., LTD. is exempt from any responsibilities.
SAITO FG-57TS is the updated model exclusively for Acrobatic flight based on FG-57T which has been gotten good reputations
from many scale flyers. The standard equipments such as stand-off mount and heatsink make installation easier and bring it
durability against heat during your active flight. Of course, its reliability and beautiful twin sound have been taken from FG-57T.
Notification about treatment of 4-stroke model gas-engine
◎Since valve timing is designed to get high power and high speed, the overlap range is relatively wide. So sometimes fuel get flown
back from the carburetor. (It may spatter in the engine room.）
◎Since the oil for lubrication is mixed in the fuel, waste oil from the breather nipple is dirty. Depending on treatment of waste oil, it
can be spattered on the plane. （Ref. chapter 9）
◎Since lubrication is through breather, sometimes the oil oozes from each joint or commissure however it s no problem on performance.
◎Depending on the quality of the oil, sometimes there can be rust inside the crankcase. But it s no problem on performance as long
as there are no abnormal noise or backlash.
Specifications
Bore
Weight
Practical speed
Propeller
Fuel
Fuel consumption
Battery for ignition system
Standard accessories
1. Propeller
Depending on the airframe, please adopt the standard size in
the data and use a reliable product which is generally on the
market. (Carbon prop is recommended)
Since a large-diameter prop is used, please maintain sufficient
balance. Since an imbalanced prop is vibratory and dangerous
with lowered performance, please maintain balance with a
balancer. Moreover, a cracked prop is dangerous. Make sure to
check any time and replace it with a new one if it s cracked.
*Prop and fuel consumption
If the load is large (the diameter & pitch of the prop is large) for the
engine characteristics, the air-fuel mixture should be rich. Thus the
main needle has to be opened. That is, even if the revolution is low,
the fuel consumption is high. Conversely, when the load is small and
the revolution is high, the fuel consumption is lowered because the
main needle can be closed.
In order to decrease the fuel consumption and prolong the engine life,
a propeller should be used whose revolution is maximized when the
throttle-valve is fully opened, while using an airframe which enables
all flights with about 90% of the output of the propeller. In this case,
the throttle valve will be further throttled during horizontal flight. On
the contrary, an airframe which can only deliver performance in fully
open condition will suffer worsening fuel consumption and life.
SAITO FG-57TS
4-Stroke Gasoline twin Engine Operating instructions
36.0mm x 2
Body: 2,090g / Muffler: 90g / Ignition system: 170g Engine mount: 80g (20g x 4）
Approx. 1,500-7,000rpm
D21 x23 P10 x11
Regular gasoline ： Oil＝20:1 (Volume ratio)
Approx. 35cc/min (At full throttle 6,500rpm)
*Fuel flow varies depends upon prop load. More fuel flow with larger load and less fuel flow with smaller load.
Voltage:6-9V higher than 1,000mA is recommended
Engine mount set (Stand-off 35mm)
Ignition system （w/ sensor）
Spark plug [NGK CM-6] （Attached to engine）
Muffler set (2 Flexible mufflers & Bracket)
Carburetor adjustment bar
Choke bar
Stroke
28.0mm x 2
Max on Gnd
Approx. 6,000 7,000rpm
Static thrust Approx. 6 8kgf (Depend on prop）
Applications
4pcs Aluminum prop washer (w/steel washer)1set
1set Limit gauge (0.1t) for tappet adjustment 1pc
2pcs Spanner for tappet adjusting lock nut 1pc
1set Hexagonal wrench set
1pc Plug wrench
1pc Anti-loosening nut
Outside dimensions
60
103
4- Ø 5.2
E.C
E.C
78
Fig.1
(97)
-1-
Disp.
57.0cc
Gas-engine 50cc class
83
49.5
34
M10x1.25
38
96
159
217
1set
1pc
1pc
68.5
3