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©2015 Toni Clark practical scale GmbH Zeiss-Str.10 D-32312 Lübbecke Tel. 0049 5741/5035 Fax. 05741/40338 www.toni-clark.com

Instructions Valach VM 120 B2-4T

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Last revision: November 13th, 2015

Content

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Specifications Valach VM 120 B2-4T

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Engine application

4

Description of the engine

4 Fuel
5

Mounting of the intake RAM tube

5

Mounting the prop shaft

5 Installation
5

Fuel tank

6

The ignition

6

Exhaust header

7 Silencer
8

Crank case venting

9 Carburetor
11 Propeller
11  Tighten the prop screws the right way
11  Safety instructions, the right use of propellers
12  Starting the engine
12  Ignition safety shut off
13  Breaking-in the engine
13 Maintenance
14  Changing the spark plugs
14  Adjusting the valve gap
15 Lubrication
15 Repair
15  Scope of supply

16

Appendix

Basics of petrol engines

16  Engine cooling
16  Example of installation, the VM 170 B2-4T in a EMW 3m Pitts
17  Installation of the fuel tank
18  Fuel tank connections
19  Fuel tubing
19  Installation of the ignition
21  Carburetor linkage
23  VM 120 B2-4T rear view, Scale 1:1

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Содержание VM 120 B2-4T

Страница 1: ...Toni Clark practical scale GmbH Instructions ...

Страница 2: ...cer 8 Crank case venting 9 Carburetor 11 Propeller 11 Tighten the prop screws the right way 11 Safety instructions the right use of propellers 12 Starting the engine 12 Ignition safety shut off 13 Breaking in the engine 13 Maintenance 14 Changing the spark plugs 14 Adjusting the valve gap 15 Lubrication 15 Repair 15 Scope of supply 16 Appendix Basics of petrol engines 16 Engine cooling 16 Example ...

Страница 3: ...range 4500 to 5000 RPM on the ground Fuel mixture 1 30 1 25 while breaking in Gasoline At least 95 octane ideal BP Aral Ultimate 102 Oil Valvoline SynPower 2T Breaking in time 3 hours the first 2 hours with 1 25 mixture Needle setting Low speed needle L 1 3 4 turns factory setting for breaking in 1 1 4 turns later with intake RAM tube High speed needle H 2 turns factory setting for breaking in 1 1...

Страница 4: ... shorter Mixed fuel has to be used within 30 days The first two hours of the breaking in time has do be done with a mixture with a ratio of 1 25 this equates 4 oil in the gasoline After that we recommend a mixture of 1 30 The whole breaking in time is approx three hours After many tests the oil we recommend for the Valach Motors four stroke engines is Valvoline SynPower 2T The extremely high quali...

Страница 5: ... are securely tightened We recommend the use of lock washers DIN 127 or a threadlocking with a medium strength Loctite 642 To move the engine forward if necessary stand off s are supplied with the engine Do not use longer standoffs they are torsionally not stiff enough and cause a lot of vibration in many circumstances If necessary built an engine dome Do not use rubber shocks They are not needed ...

Страница 6: ... two beeps with a risingpitch Theinactivestate after1minutewithoutturningthepropeller isindicated in the same way at regular intervals by two beeps with falling pitch Exhaust header With four stroke engines feasible header lengths have almost no effect on power but header length has a pronounced effect on the sound When the engine is run without a silencer a longer header produces a warmer more pl...

Страница 7: ...eturns about 400 RPM more compared to other silencers The advantage of using only one silencer is the phenomenally light weight and the engine is not much louder than with two silencers When quietness has the highest priority for your engine installation we can supply twin silencers with a rear exhaust 7275 as well as with a front exhaust 7270 The picture shows exemplarily the instal lation of two...

Страница 8: ...illed with absorbent cotton wads from the dentist The oil is absorbed by the cotton and will not come out while the wildest aerobatic maneuvers I use an empty 100 ml bottle of our silver solder flux H1 The cap has a double sided tank nipple and eight 3 mm venting holes in it Do not omit the venting holes they are absolutely necessary The small tube on the nipple guides the oil in the middle of the...

Страница 9: ...lly in and screw them out two turns and 1 3 4 turns for the low speed needle The fine tuning for best performance and throttle response is made after the engine is mounted in the model Onmyengine afterbreaking inthehighspeedneedleis11 2turnsandthelowspeed needle 1 1 4 turns open The diaphragm pump into the carburetor is supplied with the pulsing crankcase pressure by a tube Keep an eye on the cond...

Страница 10: ...nd full throttle The throttle valve will open on the full servospeed The servoarm should have a lenght of about 14 mm to maintain the full servotrack To link the throttle valve drill a 2 mm hole into the existing arm and attach a ball joint Keep the throttle linkage as light as possible a carbon rod is the best choice By no means remove the spring The life time of the throttle valve bearing of the...

Страница 11: ...ide of the propeller longer than needed Make absolutely clear to spectators that they have to stay behind the propeller area Check the propeller before every flight Do not repair propellers or use damaged propellers Check every day before the first start if the six M5 prop screws are tightened Check the length of the M5 prop screws before you attach the propeller On the one hand they have to be lo...

Страница 12: ...e for about 10 seconds 10 Accelerate to 25 throttle to warm the engine up for about 30 seconds until you taxi to the runway If your engine had run during the last hour 1 Close the choke valve completely 2 Open the throttle valve a bit more than required for normal idle 3 Ask a reliable and strong person to hold your model 4 Flip the engine once with the ignition switched off 5 Open the choke valve...

Страница 13: ...ery 30 minutes until after about five hours only minor changes will occur Afterwards it is enough to check it every four or five hours The backside of the crankcase is connected to the carburetor with a tube This tube guides the alternating crankcase pressure to the diaphragm pump into the carbure tor to actuate it If you deploy the engine for aerobatics with long vertical climbs and hover maneuve...

Страница 14: ...is means that both valves are slightly open i e one valve begins to open while the other starts to close In this position of the crank shaft you can adjust the valve gap of the opposite cylinder 3 Firstoffallmeasurethegapwiththefeeler gauge 0 1 mm The gap is OK when the gauge can easily without strong resistance be pushed through the valve end and the rockerarm Thegapistobig ifnofrictioncan be fel...

Страница 15: ...tains PTFE and has a temperature range up to 250 C The pictures show the lubricating points on the rocker arm bearings and the valve shafts Repair If you have any trouble with your engine feel free to contact us Toni Clark practical scale GmbH Zeiss Str 10 D 32312 Lübbecke Tel 0049 0 5741 5035 Fax 40338 e mail reinsch toni clark com Scope of supply Engine Feeler gauge 0 1 mm Instructions Ignition ...

Страница 16: ...ine asitwillgrindin itwillnotcauseinterferenceanditisnotsensitivetovibrations Air which flows in a distance of more than a few millimeters from the cooling fins has no effect on the cooling of the engine In other words The worst cooling is achieved by a cowling with a huge volume a big intake and no attempt to force the air through the cooling fins of your engine Example of installation the VM 170...

Страница 17: ...seamesh and thelatterhavealargecapacity allowingairtoaccumulateandtherebycausingtheengine tostop duetothesuddeningestionofthisaccumulatedairbythecarburetor Thesecond and very important reason for using our cotton felt filter is that in petrol there is always a certain amount of suspended matter that is almost impossible to see with the naked eye This dirt will easily pass through the model filter ...

Страница 18: ...to fill the tank Thesetwolinesarealwaysshutoff withtwo3 5mmselftappingscrews15mmlongwith heads removed while the model is flying or otherwise parked Because the threads are so coarse enough air can enter the tank but even during violent stunting no fuel will be lost The saving in fuel is considerable This system is simple and 100 reliable alsoduringfillingthetank youwill notspillfueloveryourmodel ...

Страница 19: ...emodeltoensurethatthereareno sharpbends Thistubeisnotespeciallyheatresistant thereforeitfollowsitmustnotmake contact with any hot engine parts Installation of the ignition Pleaseinstallallcomponentsoftheignition includingtheignitionbatteryasfarawayfrom the remote control components as possible Pleaseinstallallcableswithgreatestcare Especiallythehighvoltageignitioncablesshould not rub anywhere Only...

Страница 20: ...ough from the warm sound go through The super stiff engine mount is made from 10x0 3 mm stainless steel tubes It weighs despite of its size just 330 g The black pump on the bottom of the firewall is an Emcotec smoke pump It injects the oil over 3mm stainless steel tubes into both exhaust header The oil reservoir is mounted with Velcro and can easily be removed to drain it The microprocessor Igniti...

Страница 21: ... 1 on www toni clark com Carburetor linkage To link the throttle valve I drilled a 2mm hole into the existing arm and attached a M2 ball joint The pushrods are made from 3 mm carbon rods The ball joints are bored out to 3mm and glued on with Araldite 2011 The existing choke arm faced into the wrong direction so I removed it file down the bulged end of the rod and replaced it with our Novotex arm 6...

Страница 22: ... 2015 ToniClarkpracticalscaleGmbH Zeiss Str 10 D 32312Lübbecke Tel 00495741 5035 Fax 05741 40338 www toni clark com Instructions Valach VM 120 B2 4T 22 ...

Страница 23: ...Valach VM 120 B2 4T Instructions 23 VM 120 B2 4T front view Scale 1 1 ...

Страница 24: ...Instructions Valach VM 120 B2 4T Toni Clark practical scale GmbH Zeiss Str 10 D 32312 Lübbecke E Mail reinsch toni clark com Tel 0049 0 5741 5035 Fax 0049 0 5741 40338 www toni clark com ...

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