Jay, Per FAR 1, Definitions, an LSA of any type cannot have an inflight
adjustable propeller.
Also, unless Zenith is willing to build and certify a CH-750 as an SLSA
(Special Light Sport Aircraft) per FAR 21.190 and give you the necessary
documentation to meet FAR 21.193e you cannot register it as an ELSA
(Experimental Light Sport Aircraft) per FAR 21.191i(2). You can, however,
register it as EAB (Experimental Amateur Built) per FAR 21.191g.
Rick Girard
On Thu, Mar 18, 2010 at 9:18 AM, Jay Parker <zeus45601@yahoo.com> wrote:
> Does anyone here have any data regarding the use of using an Airmaster
> AP420 http://www.airmasterpropellers.com/wab487.html with the Jabiru
> engine preferably using the smaller 2200 on a Zenith CH-750 or comparable
> sized plane? I=92m wondering if the Jabiru 2200 /w 85HP and Airmaster wo
uld
> show noticeable improvements in average cruise speed, climb, takeoff, to
> handle as well as the aircraft just fitted with a Jabiru 3300 with no
> constant speed prop, power-wise. I=92m a little reluctant to use a small
er
> engine under 100 HP on the Zenith CH-750 even though Zenith says it will
fly
> with engines with horsepowers in the range of 80 to 125 HP, but I would
> consider the 85HP Jabiru 2200 if it were fitted with an Airmaster AP420 i
f
> Constant Speed propeller if I could be shown to get the economy of a 4
> stroke (4gals/hr) engine, with the assurance of no sluggish handlings on
> take-off or climbs. I was told I would have to register such a plane wit
h
> an Airmaster as an Experimental-LSA as opposed to just an Amateur Built-L
SA.
> I=92m not certain of the repercussions, cons or pros of registering a pla
ne
> one way or another, but for the sack of fuel economy and dependable power
> when needed, I=92m toying with this idea of a CH-750 with a Jab 2200 engi
ne
> and an Airmaster AP420 Constant Speed Propeller combo. I would appreciat
e
> any word, rumors etc on this topic and realize that such a combo would be
> rare here in the States, but may not be unusual in Australia, New Zealand
or
> Tasmania since both the Jabiru and Airmaster are products of that region.
>
> Jay Parker
>
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>
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