How many knots would be gained with this?
"Nathan Young" wrote in message
...
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.