Cozy III
Pilot’s Operating Handbook Page 56
ENVELOPE EXPANSION
With first flight completed and any squawks resolved, you are
ready to expand your flight envelope. Do not promptly charge
out and test-fly your aircraft at the extreme c.g. position and
weights shown on page 40. Expand your envelope in small
increments. Remember, you have to spend 40 hours in your test
area, so put the time to good use and do a professional job of
flight testing. Before expanding the weight and c.g. range shown
for initial testing, spend a few hours and become thoroughly
comfortable in your piloting tasks. When you feel at home in the
airplane, begin your expansion of the weight, c.g. position, load
factor, and airspeed ranges. Don't feel obligated to expand into
the full ranges shown in the plans and in this handbook. Expand
your limitations slowly, and if you reach a point that you feel
uncomfortable, stop! The ranges shown are those demonstrated
by the designer. Feel free to restrict your airplane as you
determine in your own testing; just don't exceed the design limits
shown.
Do not assume that your aircraft will fly exactly the same as
N22CZ,, the COZY prototype. Minor homebuilder construction
tolerances can affect flying qualities and performance; for
example, your aircraft may exhibit less or more stall margin. As
with any aircraft, completely determine your stall characteristics
at a safe altitude, and then operate your aircraft accordingly.
After you complete the expansion of the c.g. envelope on your
aircraft, you may want to change the placarded minimum and
maximum front seat weights to those with which you are
comfortable.
Some words of general caution - Wear a parachute for your flight
testing. Never leave a squawk unresolved; find and fix problems
as you encounter them. Airplanes usually give a hint of
impending trouble. The problem is we pilots don't always listen.
If something changes, a slight roughness or vibration, new oil
leak, trim change, new squeak, etc, look until you find it. Don't
rationalize it away. Have bunches of fun!
FLIGHT - FLUTTER ENVELOPE
EXPANSION
Before you exceed 150 knots (150 mph), you should be
absolutely certain your elevators and ailerons are balanced per
specs, you should be wearing a parachute, and you should be at
a height of at least 7,000 ft. AGL. You should expand the
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