Cozy III
Pilot’s Operating Handbook Page 9
equipment and builder workmanship. The maximum allowable
gross weight for takeoff is 1500 lbs., except as noted below.
The front seat, because of its location approximately 40" ahead
of the acceptable loaded c.g. range, will have a minimum and
maximum weight limit, which will be determined for each airplane
after completion as part of the weight & balance. The prototype,
with a light engine installation, no starter, battery in the aft
location, and a heavy instrument installation, has a 185 lb.
minimum and 340 lb. maximum front seat limit. Pilots lighter than
the minimum, when flying solo, MUST add ballast to the nose
compartment. The maximum weight limit cannot be extended by
use of ballast.
The back seat can structurally accommodate a maximum of 200
lbs., if gross weight limit of 1500 lbs. allows, and if placed over
c.g. so as to not affect c.g. adversely.
Total loading of aircraft with people, baggage, and fuel must
meet both c.g. and gross weight limitations. NOTE: A gross
weight in excess of 1500 lbs. for take-off only can be allowed
only under certain conditions. See "Weight & Balance" section of
this manual.
ENGINE & PROPELLER
All models of the Lycoming 0-235 are currently approved for use
in the COZY. A mechanical fuel pump is required. If the engine
was originally installed in a high-wing airplane, like a Cessna, it
will not have a mechanical pump. However, one can be
retrofitted at a nominal additional cost. Other accessories such
as alternator, starter and vacuum pump may be used. The most
desirable model is the 100 octane with dynafocal mount. All
models are suitable for pusher operations in this application.
Most models are in current production. Used engines are
preferred over new ones, because they are much less expensive
and less likely to overheat during initial taxi and flight testing.
Due to weight and balance and structural considerations, heavier
or higher horsepower engines are not recommended. The Rolls-
Royce Continental 0-240 (130 hp) is probably also satisfactory,
because it meets the weight limitation, but has not been flight
tested in the COZY.
Only the light-weight, fixed-pitch, solid wood propellors are
approved. Turbo charging and constant speed, variable pitch or
metal propellors are not approved.
The modern wood prop uses a plastic leading edge to minimize
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