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engine internals question

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Old 05-13-04, 09:36 PM
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engine internals question

why are the center and outer plates iron? do they have to be?

does the rotor housing have an iron insert where the apex seal scrapes like a cylinder liner or is it all aluminum?
Old 05-13-04, 10:21 PM
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Re: engine internals question

Originally posted by projekt
why are the center and outer plates iron? do they have to be?

does the rotor housing have an iron insert where the apex seal scrapes like a cylinder liner or is it all aluminum?
the accounting dept said so. no, and they werent until they tooled up for the r100 in 68.

the rotor housing is cast around a peice of steel bent into the correct shape, and then the steel is chrome plated
Old 05-15-04, 09:16 AM
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so then it would be possible to make a one piece block as long as you can install the rotors, right?
Old 05-15-04, 10:30 AM
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Re: engine internals question

Originally posted by projekt
does the rotor housing have an iron insert where the apex seal scrapes like a cylinder liner or is it all aluminum?
The aluminum rotor housing is cast around a sheetmetal insert, which is then hard-chromed for wear resistance.

This was not uncommon back in the day for boingers... many WWII airplane engines had hard-chromed cylinder liners. Then again they were expected to basically run WOT for thousands of hours between overhauls.
Old 05-15-04, 12:30 PM
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actually some of the old boingers are a steel tube and a another flat peice of steel bent around and welded up to be the water jacket
Old 05-18-04, 09:19 PM
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Originally posted by projekt
so then it would be possible to make a one piece block as long as you can install the rotors, right?
I wouldn't think so. Why would you want to do this?
Old 05-26-04, 11:48 PM
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http://racingbeat.com/resultset.asp?PartNumber=11051

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