R/C Tech Forums - View Single Post - Drivetrain Weight/Mass

10-03-2003 | 04:39 AM

#82

sands

Tech Addict

Joined: Sep 2003

Posts: 620

From: Iowa

You are 90 correct, most race engines have a very aggressive cam profile and lift, which makes low rpms very rough. They either need a slightly hevier flywheel or a higher idle to keep running. given that racers had rotating mass, they will go for th lighter fly and rougher idle. races aren't run at idle.

If you ever go to a real track, this is why the divers are allways blipping the throttle at idle. To keep the car running.

Sands

Quote:

Originally posted by PitCrew
Still mis-understood.......

I didn't say the flywheel made or decreased, or increased compression, nor did it have ANY effect on compression. Merely that the flywheel carried kinetic energy, to keep the enging spinning to aid the compression stroke. I was theorizing that with a heavier fly wheel, you could increase the compression ( by different bore, stroke, valve life/duration/timing to increase power output without stalling the engine.

OK I was wrong. I do'nt know too much about these electric engines..

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