COZY III Owner's manual

SIDE-BY-SIDE LONG EZ – THREE SEAT – COZY III
Pilot’s Operating Handbook
Version 1.0
Registration: ______
Serial Number: ______
Owner: ____________

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Pilot’s Operating Handbook Page 2

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Pilot’s Operating Handbook Page 3
REGISTRATION NUMBER:
BUILT BY:
ADDRESS:
DATE OF MANUFACTURE:
ENGINE TYPE:
ENGINE SERIAL NO:
HOURS SMOH AT INSTALLATION:
DATE OF FIRST FLIGHT:
SOLD TO:
ADDRESS:
DATE SOLD:
NOTES:

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Pilot’s Operating Handbook Page 4
Table of Contents
GENERAL DESCRIPTION..........................................................5
NORMAL OPERATIONS...........................................................16
EMERGENCY PROCEDURES.................................................29
PILOT EXPERIENCE REQUIREMENTS AND CHECKOUT....35
WEIGHT AND BALANCE..........................................................37
APPENDIX I: (Initial Systems Checkout) ................................41
APPENDIX II: (Flight Test Procedures)...................................51
APPENDIX III: (Maintenance / Inspection)..............................58
APPENDIX IV: (FAA Records)................................................64
APPENDIX V: (Performance Data) .........................................65
COZY CHECK LIST...................................................................75
NOTES ......................................................................................80
Document Version Descriptions
Version 1.0
Text recognition and manual correction from scanned copy
of First Edition – May 1986
includes misspellings and
strange case, no updates. Removed page references.
NOTE
THE INFORMATION IN THIS MANUAL REFERS TO
AIRCRAFT BUILT ACCORDING TO THE COZY
MANUFACTURING MANUAL. ANY HOMEBUILDER
MODIFICATIONS MAY ALTER THE APPLICABILITY TO HIS
(OR HER) AIRCRAFT.
WARNING
THIS MANUAL IS OBSOLETE UNLESS UPDATED BY
NEWSLETTER #12 AND ON.

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Pilot’s Operating Handbook Page 5
GENERAL DESCRIPTION
The COZY is a small, compact, high performance, high utility
sportplane. It features side-by-side seating for an average size
couple or smaller, full dual controls, an expansive instrument
panel, and a large baggage bay in the rear which could double
as an extra seat. While recommended mainly for day-VFR
operation, competent pilots can also equip it for night and IFR
flying. The recommended power plant is any model of the 0-235
Lycoming. A mechanical fuel pump is required. It has an
alternator powered electrical system and can be equipped with
an electric starter. The cockpit layout is designed to complement
pilot and/or co-pilot work load, with throttle, mixture, carb heat,
pitch trim, aileron trim, landing brake, landing light, nose wheel
crank, cabin heat and fuel tank selector valve lo-cated in a center
console for equal access to both pilot and copilot, and individual
side-stick controllers on both outside armrests. Seating provides
armrest, lumbar, thigh and head support for "recliner-chair"
comfort not found in conventional aircraft seats. This allows long,
fatigue-free flights.
The COZY uses the very latest aerodynamic technology,
combining winglets, a high aspect-ratio wing with Eppler airfoils
optimized for efficient cruise, and a configuration with far less
wetted area than conventional airplanes. Because its power-off
glide angle is only 3.7 degrees, a belly mounted landing brake is
used to steepen descent to landing.
DIMENSIONS
Wing Span / Area............ 26.1ft (7.9m) / 81.9 sq. ft (7.62 sq. m)
Canard Span / Area....... 12.5 ft (3.8m) / 13.6 sq. ft.(1.26 sq. m)
Total Wing Area.....................................95.6 sq. ft. (8.88 sq. m)
Length................................................................16.8 ft. (5.12 m)
Height ................................................................... 7.9 ft. (2.4 m)
Cockpit Width..............................................................................
Front .............................................................40.0 in (1.02 m)
Rear..............................................................25.0 in (0.64 m)
Cockpit Height ............................................................................
Front .............................................................36.0 in (0.91 m)
Rear..............................................................35.0 in (0.89 m)
Cockpit Length............................................................................
Front ................................................................70 in (1.78 m)
Rear.................................................................54 in (1.37 m)

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Figure 1: Cozy III Three View with Dimensions

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FLYING QUALITIES
The flying qualities of the COZY are superb. It is a very solid,
stable airplane that has responsive ailerons, good turbulence
resistance, excellent "hands-off" stability and docile stall
characteristics. It resists stall or spin even when maneuvered
sharply to full aft stick. Flight tests show the prototype to be free
from stall departures and spins. Climb is excellent, even at full aft
stick speed. Trim changes due to power, gear retraction or
landing brake are all very small.
The COZY's approach and landing speed are 80 mph (68 kts.)
and 65 mph (55 kts) at normal landing weights. The approach
and landing are docile and conventional. Forward visibility is
excellent even during touchdown.
UTILITY
The COZY adds side-by-side seating, a large instrument panel,
full dual controls, and a large baggage compartment to the
unusual efficiency, speed and range of the Long EZ, from which
it was derived*. This allows passenger to assist with piloting
and/or navigating duties, making long trips more enjoyable and
less fatiguing. More complete instrumentation and navigation
aids adds a margin of safety on long trips, particularly if
deteriorating weather is encountered enroute.
Range will depend upon the cruise speed selected and the
amount of payload available for fuel. Fast cruise at 8,000 ft. and
180 mph results in a fuel burn of 6.7 gph. With a full load of fuel,
range would be 1,200 miles in 6.7 hrs with a 1 hr. reserve.
Economy cruise at 12,000 ft. and 140 mph results in a fuel burn
of 3.6 gph and with full fuel, range would be 1,800 miles in 12.8
hrs. with 1.5 hrs. reserve.
The COZY is not suitable nor recommended for operations from
unprepared surfaces; i.e. gravel, loose dirt, or rough fields.
The COZY requires management of front seat loading within
predetermined limits as discussed below in "Weights" and in the
"Weight & Balance" section.
*Under a written license agreement with Rutan Aircraft Factory.
WEIGHTS
The normal equipped empty weight is approximately 900 lbs.
Actual weights for each airplane will vary, according to installed

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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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rain erosion and has an efficiency close to the best metal
propellors, while offering a solution to the fatigue problem. For
good takeoff and climb performance, a propellor should turn in
excess of 2400 rpm on the ground (static), since horsepower is a
function of rpm. The higher the static rpm, however, the higher
will be the rpm at 75% power cruise (full throttle at 8,000 ft.). A
good "climb" prop will turn 100 to 200 rpm over the engine's
rated rpm at 75% power cruise. With light wood props, this
overspeed condition is not considered by most people to be
detrimental to the engine. Overspeed at maximum cruise can be
avoided by selecting a higher pitched "cruise" prop; however
takeoff and climb might be affected as much as 25%, and cruise
speed will not necessarily be any faster. Data on propellors of 4
different suppliers in a 125 hp Long EZ is shown below:
Manufacturer
Diam / Pitch
RPM Static
RPM Cruise
Ted’s
62 x 66
2360
2900
B & T
63 x 67
2300
2920
Great American
62 x 62
2520
2925
Sensenich
64 x 72
2150
2860
For lower horsepower engines, the pitch should be less. We
prefer a "climb" prop to get best takeoff performance, and like to
cruise at about rated rpm. At 75% power cruise, the "climb" prop
will overspeed, but be slightly faster than the "cruise" prop.
LANDING GEAR
The COZY features a tricycle landing gear with fixed mains and
a retractable nose wheel. The main landing gear is a one piece,
molded S-fiberglass/epoxy unit which gives exceptional energy
absorption for bounce-free landing. For minimum drag penalty
with fixed main gear, the gear strut is mo1ded into an airfoil
shape, eliminating the need for superficial fairings. The main
wheels are streamlined with wheel pants. The retractable
nosegear strut is also molded glass, and is mechanically
actuated by a simple crank in the front cockpit. The nose gear is
retracted in flight for optimum performance and also on the
ground to provide nose-down parking. This stable, self-chocking
parking position allows easy entry for a back seat passenger.
Nosegear position is displayed to the pilot through a plexiglass
window, through which he views the nose wheel directly.
The COZY is equipped with a buzzer gear-warning system which