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8

NOTES WHEN APPLYING
AN ELECTRIC STARTER

Do  not  over-prime.  This  could 
cause a hydraulic lock and damage 
the  engine  on  application  of  the 
electric starter.

If  over-primed,  remove  glowplug, 
close  needle-valve  and  apply 
starter  to  pump  out  surplus  fuel. 
Cover  the  head  with  a  rag  to 
prevent  pumped  out  fuel  getting 
into your eyes.

9

INTRODUCTION

THE MAX-10LA,15LA,25LA have been developed to 
meet  the  requirements  of    beginners  and  sport 
flyers. Of modern design and having a separate 
needle-valve  unit  mounted  at  the  rear,  where 
manual  adjustment  is  safely  remote  from  the 
rotating  propeller,  they  offer  the  advantages  of 
reliability and easy handling, at lower cost. Like all 
O.S.  engines  they  are  built  to  standards  of 
engineering excellence that have evolved through 
more than 60 years' experience in the design and 
production of model internal-combustion engines. 
Advanced modern precision machinery, top quality 
materials and the efforts of highly skilled craftsmen 
and  technicians  are  combined    to  ensure  a 
continuation  of  the  levels  of  performance, 
durability  and  reliability  for  which O.S.  is  world 
famous. 

The  'midnight  blue'  external  finish  may  be 
decolorized  by  very  high  surface  temperature  or 
by certain solvents. Such decolorization does not 
affect engine perfor-mance, however.

Cylinder head

Carburettor 

Silicone Tubing

Crankshaft

Propeller nut

Propeller washer

Drive Hub

Crankcase

Needle valve

Cover Plate

Fuel outlet

Fuel inlet

Glowplug

Connect  the  short  length  of  fuel  tubing  supplied 
securely  between  the  fuel  outlet  and  the  fuel  inlet.  In 
the  event  of  the  tubing  becoming  damaged,  it  should 
be replaced with a suitable length of best quality 5mm 
ODX2mm  ID  silicone  tubing.  Use  similar  material  to 
connect the fuel inlet nipple to the fuel tank.

Содержание MAX-10LA

Страница 1: ...trol equipment etc are accessible for checking at the same time 1 CONTENTS SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O S ENGINE ENIGNE CONSTRUCTION NOTES WHEN APPLYING AN ELECTRIC STARTER INTRODUCTI...

Страница 2: ...onous Do not allow it to come into contact with the eyes or mouth Always store it in a clearly marked container and out of the reach of children Never operate your engine in an en closed space Model e...

Страница 3: ...check the tightness of the propeller nut and retighten it if necessary before restarting the engine Also check the tightness of all the screws and nuts before restarting the engine If you install a s...

Страница 4: ...paring your model for flight If you have to carry the model to the take off point with the engine running be especially cautious Keep the propeller pointed away from you and walk well clear of spectat...

Страница 5: ...0 years experience in the design and production of model internal combustion engines Advanced modern precision machinery top quality materials and the efforts of highly skilled craftsmen and technicia...

Страница 6: ...um Tighten second nut firmlydown onto first nut Tighten this nut first Steel washer 3mm steel nuts 3mm steel screw Spring washer or lock washer 12mm min 12mm min Hardwood such as cherry or maple Sprin...

Страница 7: ...ories etc The following items are necessary for operating the engine Fuel Model glowplug engine fuel of good quality preferably containing a small percentage of nitromethane See Advice on selection of...

Страница 8: ...rom adhering to the tank wall under suction and restricting fuel flow slots may be filed I the end of the weight Alternatively O S Non Bubble Weight is available as an optional extra It is recommended...

Страница 9: ...cal experiment Trainer Sport LA Series Never touch or allow any object to come into contact with the rotating propeller and do not crouch over the engine when it is running Running in Reminder 17 GLOW...

Страница 10: ...nal extra part Wrench Alternatively a spinner assembly enclosing the propeller boss may be used but make sure that it isof sturdy construction and that the spinner shell does not loosen when the start...

Страница 11: ...or to choke intake Turn the propeller two revolutions while watching fuel line 7 Priming When the engine is being started for the first time turn the propeller two revolutions after fuel reaches the f...

Страница 12: ...ect battery leads as shown polarity is immaterial 23 12 Apply electric starter Check that the throttle is one third open from the fully closed position Bring the starter into contact with the spinner...

Страница 13: ...re disconnected close the needle valve a little approx 45 further and restart the engine 16 Needle valve adjustment 2 As the needle valve is closed beyond the initial readjustment the rpm of the engin...

Страница 14: ...pm is reached and will fall off or engine will stop if needle valve is closed any further Exhaust gas will be very light Finally exhaust note is now a steady high pitched sound rising higher in pitch...

Страница 15: ...he engine installed in the model The process is as follows 29 1 Start the engine and with the throttle fully open open the needle valve an extra half turn 180 from the optimum setting This will produc...

Страница 16: ...n from maximum r p m setting Yes No Yes Engine stops Engine stops Engine stops 31 15 25LA CARBURETTOR AIR BLEED ADJUSTMENT Pre Flight Check Start engine and adjust needle valve as previously described...

Страница 17: ...t priming procedure referring to 7 Priming Close needle valve half turn 180 and wait for several minutes then re start Priming is not necessary Make sure that tank is filled with fuel Check that there...

Страница 18: ...lem 35 Do not close the needlevalve and air bleed screw too far as this will cause a lean setting and over heating of the engine This can in turn create nitromethane oxide leading to internal rusting...

Страница 19: ...00 20810007 21109005 21758000 21620006 21001000 21001010 21002000 21007000 21781970 24981837 26381501 21014000 21013000 71605300 21225000 22681957 22325300 21125409 1 8 Description Code No No Cylinder...

Страница 20: ...0007 21109005 21758000 21620006 21751000 21751010 21752000 21757000 21757100 26711305 21781970 24981837 26381501 21714100 21713000 71605300 21225000 22681957 22325300 21225400 1 10 Description Code No...

Страница 21: ...000 23210007 24009000 22558000 22020001 22551000 22551010 22302000 22557000 22557100 26711305 24081970 24981837 26381501 22564000 22563000 71605300 22325020 22681957 22325310 22625404 Description Code...

Страница 22: ...tions are subject to alteration for improvement without notice 43 1 1 1 2 3 4 5 6 7 22081408 22081313 21781200 21783600 21783100 21783300 21015001 23081706 N M3x6 N M2x14 N M3 5x5 N M2x6 1 1 1 2 3 4 5...

Страница 23: ...ons are subject to alteration for improvement without notice Description 45 71909410 73101000 1 4 28 for 10LA for 25LA 71909310 for 15LA 71908100 21125108 for 10 15LA 22325100 for 25LA 21225030 for 10...

Страница 24: ...specifications are subject to alteration for improvement without notice 23 38 6 11 7 44 3 27 5 23 5 20 62 15 9 23 2 M5x0 8 33 2 11 31 4 38 7 19 2 4 3 3 2 2 8 47 MAX 10LA THREE VIEW DRAWING Displaceme...

Страница 25: ...0 61 hp 15 000 r p m 197g 6 94 oz 25LA SPECIFICATIONS Displacement Bore Stroke Practical R P M Power output Weight 2 49 cc 0 1517 cu in 15 2mm 0 598 in 13 7mm 0 539 in 2 500 18 000 r p m 0 41 ps 0 42...

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