G3 Forum

Diesels, Electrics & All Things "Modern Image" => Locomotives (diesel & electric) => Internal Combustion Power for Model Locos. => Topic started by: Peaky 556 on Feb 18 2013 22:50

Title: Engine Types
Post by: Peaky 556 on Feb 18 2013 22:50
What are the views on types of internal combustion engine most suitable?
I'm looking at a four-stroke 0.4 cu in glow engine, being an old OS FS-40.  It fits in the space (height wise), can offer up to 700W output power should I want it, should not be too noisy if speed is kept down.  I have yet to try it out so watch this space...
Regards,
Tim
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Title: Re: Engine Types
Post by: Peaky 556 on Feb 19 2013 23:26
Correction - the OS-40FS gives a max power of about 500W at around 12000rpm.  That will sound far too busy and I only need about 100W of mechanical power, so this might be achievable with 3-5000 rpm.

I'm also ignoring the Graupner model wankel engine, as I'm told they really scream!

Regards, Tim
Title: Re: Engine Types
Post by: Peaky 556 on Jan 27 2014 22:48
Current plan is to use a pair of these OS-40FS engines, side by side.  That way they are a bit like the big Sulzer twin bank diesels like in the 'Peaks'!!

Gearing choice is being finalised such that when running at 4500 rpm they turn the generator at about 5000 rpm, to get the voltage required.

Why 4500 rpm I hear you ask?  At this speed a 4-stroke twin will have the same firing frequency as the 12-cyl Sulzer running at 750 rpm!

More anon, Tim