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Hi! Lynn
Three questions : Why is the filter before the 2nd cooler & not in front of the first? what did you do with the Mazda pump? How much weight do you think the dry sump systems adds? On Andy's system the set up is unknown, so he could have had restrictions or supply problem at different attitudes (Atkins said that he used bits & pieces from an helicopter).
Georges B.
-------Original Message-------
Date: 05/21/05 04:06:03
Subject: [FlyRotary] Re: Seized 13b
In a message dated 05/20/2005 12:09 Central Daylight Time, WRJJRS@aol.com writes:
It must have been a really bad "dry sump." Since the engine seized there as a bad problem.
Bill Jepson
I think there is far more to the story than has been exposed here.
The bearings are very large in area and if just wetted with oil will run for quite some time with light load and zero oil pressure. When I worked in the cabinet shop we had a jointer with 4 knives and a 60 pound rotor to carry them. It got a few drops of oil each morning, and ran just about all day. It had poured babbit bearings. It was 60 years old when I used it and is still running today, 35 years later.
A full throttle takeoff with no oil pressure would do it in with a high probability.
We did race for years without a windage plate between the engine and the pan. When braking hard, the entire oil supply would run up into the front cover and uncover the pickup.
Just a wiggle in the gage would indicate there was much reduced oil pressure. No damage ever resulted.
Picture is my dry sump layout.
Lynn E. Hanover
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