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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.
Specifications
Bore
36.0mm x 2
Body: 2,090g / Muffler: 90g / Ignition system: 170g Engine mount: 80g (20g x 4）
Stroke
28.0mm x 2
57.0cc
Disp.
Weight
Practical speed
Approx. 1,500-7,000rpm
D21”x23“~P10”x11”
Max on Gnd
Approx. 6,000~7,000rpm
Gas-engine 50cc class
Propeller
Static thrust
Approx. 6~8kgf (Depend on prop）
Applications
Fuel
Fuel consumption
Battery for ignition system
Standard accessories
Engine mount set (Stand-off 35mm)
4pcs
Ignition system（w/ sensor）
1set
Spark plug [NGK CM-6]
（Attached to engine）
2pcs
Muffler set (2 Flexible mufflers & Bracket)
1set
Carburetor adjustment bar
1pc
Choke bar
1pc
Aluminum prop washer (w/steel washer)1set
Limit gauge (0.1t) for tappet adjustment 1pc
Spanner for tappet adjusting lock nut 1pc
Hexagonal wrench set
1set
Plug wrench
1pc
Anti-loosening nut
1pc
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
SAITO FG-57TS
4-Stroke Gasoline twin Engine Operating instructions
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.
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 itʼs no problem on performance.
◎Depending on the quality of the oil, sometimes there can be rust inside the crankcase. But itʼs no problem on performance as long
as there are no abnormal noise or backlash.
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 itʼs 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.
Fig.1
Outside dimensions
60
4-
Ø
5.2
Ø
10
32.2
6
(85) 66
60
53
103
E.C
83
68.5
49.5
34
M10x1.25
103
E.C
78
(97)
96
38
159
217
3
