Waldron1943

Waldron1943 t1_iy8x99l wrote

(1938) - The Adventures of Robin Hood (they still haven't made a better version)

(1959) - Operation Petticoat

(1961) - It's a Mad, Mad, Mad, Mad World

(1964) - Father Goose

(1965) - The Great Race

(1965) - Those Magnificent Men in their Flying Machines

(1966) - The Russians are Coming, The Russians are Coming

(1966) - What Did You Do in the War, Daddy?

(1967) - Doctor Doolittle

(1968) - Chitty Chitty Bang Bang (does have a scary character, the child catcher)

(1969) - Monte Carlo or Bust

(1971) - On Any Sunday

(1971) - Willy Wonka and the Chocolate Factory

(1973) - The Three Musketeers

(1976) - Cannonball!

(1976) - Car Wash

(1976) - The Gumball Rally

(1980) - Silver Dream Racer

(1980) - The Gods Must Be Crazy

(1981) - History of the World, Part 1

(1981) - The Cannonball Run

(1982) - My Favorite Year

(1982) - Six Pack

(1983) - A Christmas Story

(1983) - Stroker Ace

Y'know; off the top of my head.

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Waldron1943 t1_iwerj2m wrote

Reply to comment by evilleppy87 in How an engine works. by ooMEAToo

They do open before BDC. Imagine a graph with two curves plotted. One curve is the "benefit" you get from leaving the valve closed and using every last bit of pressure. The other curve is the "benefit" you get from opening the valve early and starting exhaust flow. Those two graphs cross before BDC; there's more "benefit" to opening the valve than there is to keeping it closed.

Also, it's actually open past TDC. Right at TDC you've invested energy in establishing flow; if you slam the exhaust valve right then that flow just "piles up" against the valve, which doesn't help you. As a matter of fact, the intake valve opens (and stays open a surprisingly long time) before the exhaust valve closes...that's called "valve overlap". Less overlap = low RPM power, longer overlap = high RPM power. Overlap uses that flow through the exhaust valve to pull more fuel & air mixture into the cylinder.

Valve Overlap

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