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• Standard Type Glow Plug •
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How Glowplug Ignition Works
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With a glowplug engine, ignition is initiated by the application of a 1.5-volt power source. When the battery is disconnected, the heat retained within the engine's combusion chamber remains sufficient to keep the engine running. Ignition timing is 'automatic': At higher rpm, the plug becomes hitter and, appropriately, fires the fuel/air charge earlier; at reduced rpm, the filament becames cooler and ignition is retarded.
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Particuarly in the case of very high performance engines, glowplugs have to be regarded as consumable items. However, plug life can be lengthened and performance maintained as follows:
•Fit a plug suitable for the engine.
•Use fuel containing a moderate percentage of nitromethane unless essential for contest use.
•Do not run the engine lean, or leave the plug connected while adjusting the needle-valve.
•Use a fuel containing as low nitro as possible.
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When to replace the Glowplug
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Apart from when actually burned out, a plug may need to be replaced because it no longer delivers its best performance, such as when:
•Filament coil has became distorted.
•Filament surface has roughened while.
•Foreign matter had adhered to filament or plug body has corroded.
•Engine tends to cut out when idling.
•Starting qualities deteriorate.
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How to select a suitable glowplug in each category.
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| Type A3 |
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For R/C Aircraft
Running-in, Engines smaller than .32 capacity
Engine types: 25SF, 25FX, 10-40LA
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For R/C Helicopter
Running-in, Smaller than .32 capacity engines (for beginners)
Engine types: 32SX-H
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For R/C Cars
Running-in,For beginners (rich needle setting)
Engine types: 12/15CV and 15LD
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| Type No.8 |
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For R/C Aircraft
General purpose
Engine types: Most O.S. engines
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For R/C Helicopter
General purpose
Engine types: Most O.S. engines
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For R/C Cars
General use, 1/8 Off-road racing
Engine types: 12/15CV, 15LD, 21RG and 21RZ-V 01b
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| Type A5 |
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For R/C Aircraft
Larger than .60 capacity engines
Engine types: 61/91FX, 65LA,140RX, 160FX,BX-1, and BGX-1
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For R/C Helicopter
With higher nitro fuel, to reduce overheating
Engine types: All O.S. helicopter engines
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For R/C Cars
1/8 Off-road racing, 1/10 Circuit racing, 12 class GP touring racing
Engine types: 21RG, 21RZ-V01b, 12/15CV and 15LD, 12TR
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| Type R5 |
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For R/C Cars
1/10 and 1/8 Circuit racing
Engine types: 15RX and 21RZ-R
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| Type F |
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Engine types: All Four-stroke engines
Engine types: 140RX-FI·
160FX-FI·49PI
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