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Old December 21st 04, 04:13 AM
Nathan Young
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On Tue, 21 Dec 2004 01:18:18 GMT, "Casey Wilson"
wrote:

....have an option for a constant speed prop prior to 1975?


No.

There are aftermarket conversions for the -A3A engines that have the
hollow crank shaft.

MT-Propellers has an STC for an electric (3-bladed?) CS prop.