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4

NOTES

These  engine  were  designed  for  model 
helicopters.  Do  not  attempt  to  use  it  for  any 
other purpose.

Mount the engine in your model securely, fol-
lowing the manufacturers' recommendations, 
using appropriate screws and locknuts.

Install an effective silencer (muffler). Frequent 
close exposure to a noisy exhaust (especially 
in  the  case  of  the  more  powerful  high-speed 
engines)  may  eventually  impair  your  hearing 
and  such  noise  is  also  likely  to  cause 
annoyance to others over a wide area.

Check  the  linkage  to  the  throttle  arm  before 
each flight.

Avoid sudden high r.p.m. immediately after the 
engine is started, as the clutch will engage and 
you may be struck by the rotor.

After starting the engine, carry out any needle-
valve readjustments after stopping the rotor by 
closing the throttle to the lowest r.p.m.. 
Stop  the  engine  before  attempting  to  make 
other adjustments to the carburetor.

Use  an  electric  starter.  The  wearing  of  safety 
glasses is also strongly recommended. 
Press the rotor head down securely.

Take  care  that  the  glow  plug  clip  or  battery 
leads  do  not  come  into  contact  with  rotating 
parts.

Adjust  the  throttle  linkage  so  that  the  engine 
stops when the throttle stick and trim lever on 
the transmitter are fully retarded. Alternatively, 
the  engine  may  be  stopped  by  cutting  off  the 
fuel  supply.  Never  try  to  stop  the  engine 
physically.

5

NOTES

Take care that loose clothing (ties, shirt sleeves, 
scarves etc.) do not come into contact with the 
rotor. Do not carry loose objects (such as pen-
cils, screwdrivers, etc.) in a shirt pocket from 
where they could fall through the rotor disc.

For their safety, keep all onlookers (especially 
small children) well back (at least 20 feet or 6 
meters) when preparing your model for flight. If 
you have to carry the model to the take-off point 
with the engine running, be especially cautious. 
Hold the rotor securely and keep well clear of 
spectators.

Warning! lmmediately after a glowplug-ignition 
engine  has  been  run  and  is  still  warm, 
conditions  sometimes  exist  whereby  it  is  just 
possible  for  the  engine  to  restart  when  turned 
over  WITHOUT  the  glowplug  battery  being 
reconnected.  Remember  this  if  you  wish  to 
avoid the risk of accidents.

Содержание MAX-91SX-HRING C Spec PS VIPER

Страница 1: ...LE SERVO CARE AND MAINTENANCE EXPLODED VIEW PARTS LIST O S GENUINE PARTS ACCESSORIES THREE VIEW DRAWING MEMO 7 8 13 16 30 10 36 22 24 24 27 29 32 35 37 38 It is of vital importance before attempting t...

Страница 2: ...many other possibilities generally less obvious sources of danger but which under certain circumstances may also cause damage or injury 3 WARNINGS Never touch or allow any object to come into contact...

Страница 3: ...head down securely Take care that the glow plug clip or battery leads do not come into contact with rotating parts Adjust the throttle linkage so that the engine stops when the throttle stick and tri...

Страница 4: ...oove onto the connecting rod BDC position Rotate the crankshaft so that the connecting rod comes to this position 7 Note on installing the engine Note on heating the glow plug Cooling fan cover from s...

Страница 5: ...h torque type starter DO NOT however confuse tightness with the symptoms of hydraulic lock caused by an excess of fuel within the cylinder often the result of over priming Attempting to force the engi...

Страница 6: ...the under surfaces of the engine s mounting lugs are in contact with the engine mount 11 ABOUT THE PUMP SYSTEM Please understand the pump construction before piping Pump functions in accordance with t...

Страница 7: ...el in the pump Stop the fuel flow to the pump with the stopper and run the engine at idling to use out the fuel in the pump After stopping the engine rotate the engine by electric starter to eject fue...

Страница 8: ...1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

Страница 9: ...and connections carefully for any cracks on the tubes and loose connections as the engine runs ejecting excess fuel 17 4 Glowplug battery The power source for heating the glowplug may be either a lar...

Страница 10: ...is disconnected the heat retained within the combustion chamber remains sufficient to keep the plug filament glowing thereby continuing to keep the engine running Ignition timing is automatic under re...

Страница 11: ...Ixture Control Screw Lean With a model helicopter adjustments may vary due to various factors such as climatic conditions fuel muffler main rotor weight of the model gear ratio etc 89 degrees When the...

Страница 12: ...ating a dangerous situation 23 In case the engine does not stop Hold the rotor head and pinch the fuel line to stop the fuel supply If it still does not stop pull off the fuel line from the carburetor...

Страница 13: ...15 30 nitromethane Bear in mind that fuels containing relatively large percentages of power boosting nitromethane operate at richer mixture settings than are needed for mild fuels and will therefore r...

Страница 14: ...se at medium r p m e g hovering speeds is most important since this is a power range widely used in helicopter flight The optimum fuel air nixture strength at medium speeds is dependent on obtaining b...

Страница 15: ...mostly accumulate here SUBSEQUENT READJUSTMENTS Once the engine has been run in and the carburetor controls properly set up it should be unnecessary to alter the mixture settings except to make minor...

Страница 16: ...re Close the High Speed Needle Valve Turn clockwise Land the model Idle for approx 10 seconds then reopen throttle to observe transition Float the model Idling OK Lean mixture Rich mixture High Speed...

Страница 17: ...ide your refueling container will prevent the entry of foreign material into the fuel tank It is also recommended that a good in line filter be installed between the tank and carburetor 1 Finally inje...

Страница 18: ......

Страница 19: ...881810 27881800 27881820 45581820 29084100 27881330 27681340 27081900 27981910 24981837 46181940 46181941 26711305 46181950 Ratchet Spring Needle Needle Valve Assembly Fuel Inlet Rotor Guide Screw O R...

Страница 20: ...MP 10set Cap Screw Set M2 6x5 10pcs set 79871010 M3 5x10 79871070 7091 71530500 For 70SZ H 91SX H Needle Adjusting Screw 5pcs M2 6x5 41621100 37 THREE VIEW DRAWING Displacement Bore Stroke Practical R...

Страница 21: ...d in Japan TEL 06 6702 0225 FAX 06 6704 2722 6 15 3 Chome Imagawa Higashisumiyoshi ku Osaka 546 0003 Japan URL http www os engines co jp U N E Q U A LLEDQ U A LIT Y P R E C IS IO N P E R F O R M A N C...

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