Brodhead Pietenpol Association

Original Posted By: H RULE
Subject: Pietenpol-List: hand propingSome things I don't understand or it doesn't make sense to me.What does turning the prop backwards accomplish?If this is necessary why doesn't the engine with electric start have a reversible starter to do the same as a hand prop engine ?You will have to over look my stupidity as I'm not the sharpest knife in the set.Ted Stonecorvair piet builder**************New Low Prices on Dell Laptops =93 Starting at $399 ttp:%2F%2Fad.doubleclick.net%2Fclk%3B213540506%3B35046329%3Bx)________________________________________________________________________________Date: Wed, 1 Apr 2009 14:19:49 -0700 (PDT)

Original Posted By: TGSTONE236(at)aol.com
If the engine is flooded, by turning the engine backwards, the valve sequence works in reverse.The exhaust valve opens and pulls fresh air (no more gas) into the exhaust pipes,thru the engine and then the intake valve opens and the gas vapor rich air is pushed out the intake manifold. By repeating this the flooded engine is flushed of the gas, and dries it out.It's not done on the modern engines cause thay are controlled by a computer, and rarely flood.While our planes are working with 1940's technology.walt evansNX140DL ----- Original Message -----

Original Posted By: H RULE