Light-Sport Aircraft Yahoo group Re: Variable Ratio PSRU

It is not my intent to build a certified light sport aircraft, rather to build an expiremental aircraft that meets the light sport requirements. As I understand the regs one can use any engine and prop combination you want to in an expiremental plane as long as the finished product isn't obviously unsafe. It is also my understanding that a Light Sport pilot can legally fly an expiremental category aircraft that meets the LSA regs pertaining to weight, speeds, etc. and has a single engine with a fixed pitch prop.

The current situation with electric LSAs is just silly considering the reliability of electric motors compared to IC engines. You can ask any RC modeler about that comparison.

Vince Homer

--- In Sport_Aircraft@yahoogroups.com, Michael Coates <mcoates@...> wrote:
>
> 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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