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OS 46SF & Royal 45


Old 04-28-2008, 12:54 AM
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Default OS 46SF & Royal 45

Yes, I know these engines are NOT from the current crop but many modellers would have a few of these laying around. The Royal 45 I have is the earlier version that has the removable front housing (looks like an OS FSR clone - nice [)]).

Home brew fuel being 70% methanol, 10% nitro, 10% red Klotz & 10% castor (Castrol M). Air temp about 75F & dry.

Same glow plug (OS 8), same prop (Bolly 10.5 x 6) for all tests. Engines fitted with standard OEM mufflers

OS 46SF = 13,200 RPM

Royal 45 (removable front housing) = 12,900 RPM

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