Light-Sport Aircraft Yahoo group Re: Variable Ratio PSRU

Route reference to your question about a variable transmission instead of an in-flight adjustable propeller.

There are basically two authorities which must be satisfied.

Firstly your engine must exceed the minimum requirements set out by the relevant ASTM standard, secondly that particular standard must be accepted by the FAA.

An example at the moment is that the ASTM have approved a standard for electric aircraft but this standard is not accepted by the FAA because they still use the word reciprocating engine in all of their documentation, obviously an electric engine is not a reciprocating engine so even though we have compliance with the standards the standard is not accepted by the FAA and therefore we cannot have LSA electric aircraft at this particular time.

I doubt although I am happy to be corrected that your variable transmission idea would fall into line with any current ASTM standard.

You can have the best chicken in the world but unless it has approval to lay eggs you can't make an omelette!

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