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Old 04-19-2017, 11:53 AM   #671
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Prop or NO prop? Is the prop providing Flywheel effect or there is enough rotational inertia inside the engine?


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Old 04-19-2017, 09:25 PM   #672
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I don't want to get ahead of myself, but the single run of the original Quarter Scale prototype memorialized on Youtube by its original designer, was made without a prop. With a cylinder firing every 60 crankshaft degrees, the inertia of the prop probably isn't as important for keeping an engine running as it would be on a one or two cylinder engine. Most of the V-4 and V8 models I've seen don't have significant inertial loads.
I don't think I'd try running one of my radials without its prop. Those engines would probably heat up pretty quickly without the prop wash to cool them. It's pretty scary standing close to either of them, but especially the 18 cylinder, while it's running. If I'm lucky enough to get the Quarter Scale running, it'll probably be even scarier. - Terry


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Old 04-20-2017, 07:49 AM   #673
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Terry
Off topic but what spark plugs did you use in your howell v twin
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Old 04-20-2017, 10:56 AM   #674
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FYI some of those warbird belly radiators were raised up and down via a hand crank to prevent stone damage during take off and landing.
If you came in to land with your wheels up or your radiator down you would have a red flare shot at you by the ground crew to remind you.
Followed by a chewing out by the squadron leader.

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Old 04-23-2017, 01:27 AM   #675
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Quote:
Originally Posted by geo View Post
Terry
Off topic but what spark plugs did you use in your howell v twin
Regards Geo
Geo,
I used the Rimfire VR2L (long reach) plugs in my V-4.
Terry


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