Manual

ManualsBrandsGreat Planes ManualsAir equipmentCherokee GP/EP ARF - GPMA1033

INSTRUCTION MANUAL

Wingspan: 60 in [1520mm]

Wing Area: 606 in

[39dm

]

Weight: 6.75 – 7.25 lb [3060 – 3290g]

Wing Loading: 26 – 28 oz/ft

[79 – 85g/dm

]

Length: 46 in [1170mm]

Radio: 4-channel minimum with four to seven

standard servos and standard size receiver

Engine: .40 – .46 cu in [7 – 7.5cc] two-stroke,

.56 cu in [9.2cc] four-stroke,

42-50-800kV brushless out-runner motor

WARRANTY

Great Planes

Model Manufacturing Co. guarantees this kit to be free from defects in both material and workmanship at the date of purchase.

This warranty does not cover any component parts damaged by use or modiﬁ cation. In no case shall Great Planes’ liability exceed the

original cost of the purchased kit. Further, Great Planes reserves the right to change or modify this warranty without notice.

In that Great Planes has no control over the ﬁ nal assembly or material used for ﬁ nal assembly, no liability shall be assumed nor accepted

for any damage resulting from the use by the user of the ﬁ nal user-assembled product. By the act of using the user-assembled product,

the user accepts all resulting liability.

If the buyer is not prepared to accept the liability associated with the use of this product, the buyer is advised to return this kit

immediately in new and unused condition to the place of purchase.

To make a warranty claim send the defective part or item to Hobby Services at the address below:

Hobby Services

3002 N. Apollo Dr., Suite 1

Champaign, IL 61822 USA

Include a letter stating your name, return shipping address, as much contact information as possible (daytime telephone number, fax

number, e-mail address), a detailed description of the problem and a photocopy of the purchase receipt. Upon receipt of the package

the problem will be evaluated as quickly as possible.

READ THROUGH THIS MANUAL BEFORE

STARTING CONSTRUCTION. IT CONTAINS

IMPORTANT INSTRUCTIONS AND WARNINGS

CONCERNING THE ASSEMBLY AND USE OF

THIS MODEL.

Champaign, Illinois

(217) 398-8970, Ext 5

airsupport@greatplanes.com

Summary of content (28 pages)

PAGE 1
INSTRUCTION MANUAL Wingspan: 60 in [1520mm] Wing Area: 606 in2 [39dm2] Weight: 6.75 – 7.25 lb [3060 – 3290g] Wing Loading: 26 – 28 oz/ft2 [79 – 85g/dm2] Length: 46 in [1170mm] Radio: 4-channel minimum with four to seven standard servos and standard size receiver Engine: .40 – .46 cu in [7 – 7.5cc] two-stroke, .56 cu in [9.2cc] four-stroke, 42-50-800kV brushless out-runner motor WARRANTY Great Planes® Model Manufacturing Co.
PAGE 2
easy to fly and would be appropriate for beginners who have mastered a trainer or for the veteran pilot who just appreciates the rich history of the Cherokee. TABLE OF CONTENTS INTRODUCTION ................................................................................2 AMA ...................................................................................................2 SAFETY PRECAUTIONS ..................................................................2 DECISIONS YOU MUST MAKE .......................
PAGE 3
. You must take time to build straight, true and strong. DECISIONS YOU MUST MAKE 4. You must use an R/C radio system that is in first-class condition, and a correctly sized engine and components throughout the building process. This is a partial list of items required to finish the Cherokee .40 ARF that may require planning or decision making before starting to build. Order numbers are provided in parentheses. 5.
PAGE 4
If using the recommended brushless motor, a 60A brushless ESC is required: ❏ ADDITIONAL ITEMS REQUIRED Great Planes Silver Series 60A brushless ESC high volt (GPMM1850) Required Hardware & Accessories Propeller This is the list of hardware and accessories required to finish the Cherokee .40 ARF. Order numbers are provided in parentheses: If you are installing a glow engine, choose a prop based on the engine manufacturer’s recommendation.
PAGE 5
❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ • Photos and sketches are placed before the step they refer to. Frequently you can study photos in following steps to get another view of the same parts.
PAGE 6
If additional assistance is required for any reason contact Product Support by e-mail at productsupport@greatplanes.com, or by telephone at (217) 398-8970.
PAGE 7
KIT INSPECTION Before starting to build, take an inventory of this kit to make sure it is complete and inspect the parts to make sure they are of acceptable quality. If any parts are missing or are not of acceptable quality, or if you need assistance with assembly, contact Product Support. When reporting defective or missing parts, use the part names exactly as they are written in the Kit Contents list. Great Planes Product Support: 3002 N.
PAGE 8
over the rectangles with the grain direction perpendicular to the covers. Allow the epoxy to cure undisturbed. PREPARATIONS ❏ 1. If you have not done so already, remove the major parts of the kit from the box and inspect for damage. If any parts are damaged or missing, contact Product Support at the address or telephone number listed in the “Kit Inspection” section on page 7. ❏ ❏ 2. Cut three arms from a four-armed servo arm for the aileron servo.
PAGE 9
❏ ❏ 5. Use the string taped inside the aileron servo bay to pull the servo lead through the wing ribs. ❏ ❏ 8. Position the control horn over the plywood plate in the aileron (if you cannot see it, hold the aileron at a shallow angle in good lighting or use a small pin to puncture the covering), using the position of the servo arm as a guide. Align the holes in the control horns directly over the aileron hinge line and mark the location of the control horn mounting holes. ❏❏ 6. Thread a #2 x 3/8" [9.
PAGE 10
❏ ❏ 12. Install a control horn onto the flap using two #2 x 3/8" [9.5mm] screws. Make note that these screws are shorter than the ones used for the aileron control horns. As you did with the aileron, install a 4" [102mm] pushrod onto the flap. Before connecting the pushrod to the flap servo, use your radio system to operate the flap servo through the whole range of motion.
PAGE 11
Fixed Flaps BUILD THE FUSELAGE If you are not installing operational flaps, follow these steps to lock the flaps into the neutral position. If in the future you choose to add operational flaps, simply cut the ABS strips along the inside edge of each flap and install the flap servos and linkage as described in previous steps. Install the Tail Surfaces ❏ 1. Locate the two 3/4" x 1-1/2" [19 x 38mm] ABS flap strips. ❏ 1.
PAGE 12
Install the Tail Servos & Pushrods ❏ 1. Cut two arms from a four-armed servo arm and enlarge the outer hole of one remaining arm with a 5/64" [2mm] drill bit and the second inner hole of the other remaining arm with the same bit. Center the rudder servo with your radio system and install the servo arm perpendicular to the servo case as shown, with the outer drilled hole toward the center of the fuselage. ❏ 3. Drill 3/32" [2.4mm] holes at your marks completely through the elevator.
PAGE 13
[2mm] drill bit. Center the elevator servo with your radio system and install the servo arm onto the elevator servo as shown. Mount the elevator servo next to the rudder servo with a gap of approximately 1/4" [6mm] between the tips of the servo arms. Leave enough room for the throttle servo. Glow Engine Installation The Cherokee .40 ARF is designed to be flown with a .40 to .46 two-stroke glow engine, .56 four-stroke glow engine, or a brushless out-runner motor.
PAGE 14
ends of each side by approximately 2" [51mm]. Insert the straps into the slots in the plywood fuel tank tray as shown. ❏ 4. Fit the fuel tank tray into the fuselage by inserting the tab at the forward end of the tray into the slot in the firewall. Press the tray down onto the receiving tabs in the fuselage former and cross brace. Drill two 1/16" [1.6mm] holes through the tray and into the hardwood mounting blocks.
PAGE 15
the engine head will be on the right side. Leave the screws slightly loose. Test fit your engine between the mount halves. Slide the mount halves against the sides of the engine and finish tightening the mount screws. ❏ 9. Drill a 3/16" [4.8mm] hole in the firewall inline with throttle arm in the carburetor using a long drill bit (if you do not have a long drill bit, you may need to temporarily remove the engine).
PAGE 16
into the third outer hole in the remaining servo arm, with a 4-40 set screw loosely threaded into the connector. Center the throttle servo with your radio system and install the servo arm onto the servo as shown. Use the hardware included with the servo and install it next to the elevator servo. Brushless Motor Installation If you have installed a glow engine, skip this section as it only contains information relevant to installing a brushless motor.
PAGE 17
mounting halves are glued together in the direction shown. Attach the mounting tray to the right side of the aluminum motor mount using two 4-40 x 5/8" [16mm] machine screws, two #4 flat washers and threadlocking compound (thread the screws into unused holes in the aluminum mount). If you are installing the recommended Great Planes ESC, glue the three plywood washers onto the face of the mount. Rubber band tabs are provided for other model ESCs. shown.
PAGE 18
battery pack. Also use some self-adhesive hook and loop material to join the 11.1V and 7.4V packs together. The straps you made in step 4 are used to securely hold the battery packs onto the tray. Test fit your packs onto the tray and cut the straps to the desired length. Now would also be a good time to confirm the correct rotation of the motor using the ESC and radio system. If the motor rotates in the wrong direction, unhook any two motor leads and swap their positions.
PAGE 19
❏ 6. Fit a 5/32" [4mm] wheel collar into the nylon steering arm, aligning the threaded hole in the collar with the hole in the arm. Loosely thread a 6-32 x 1/4" [6mm] SHCS (with threadlocking compound) through the hole in the arm and into the collar. Install a brass screw-lock pushrod connector using a nylon retainer into the outer hole on the steering arm. Loosely thread a 4-40 x 1/8" [3mm] SHCS into the screwlock pushrod connector. ❏ 7. Fit the steering arm between the nylon steering block halves.
PAGE 20
FINISH THE MODEL Install the Receiver ❏ 1. Make straps from the included hook and loop material to fit your receiver and receiver pack. Cut pieces of foam rubber (not included) to fit your receiver and receiver pack and strap them to the radio tray as shown. ❏ 10. With the nose gear in place, the muffler can now be installed onto the engine (if applicable). Either the stock muffler can be used or a Pitts style muffler.
PAGE 21
❏ 3. Fit the cowl to the fuselage and align it with the colors on the fuselage. When satisfied with the fit, tape the cowl into position. Measure 3/8" [9.5mm] forward from the aft end of the cowl at each mark you made on the masking tape. Mark the cowl for each of the four cowl mounting screws. ❏ 4. Install a strain relief onto the receiver antenna to protect the solder joint that secures it inside the receiver.
PAGE 22
Install the Wing & Canopy Hatch ❏ 4. This completes the assembly of the Cherokee .40 ARF! Apply the Decals 1. Use scissors or a sharp hobby knife to cut the decals from the sheet. 2. Be certain the model is clean and free from oily fingerprints and dust. Prepare a dishpan or small bucket with a mixture of liquid dish soap and warm water–about one teaspoon of soap per gallon of water. Submerse the decal in the soap and water and peel off the paper backing.
PAGE 23
Battery Precautions/Connecting Batteries Check the Control Directions ❏ This is how to connect four batteries in Series: 1. Turn on the transmitter and receiver and center the trims. If necessary, remove the servo arms from the servos and reposition them so they are centered. Reinstall the screws that hold on the servo arms. ❏ 2. With the transmitter and receiver still on, check all the control surfaces to see if they are centered.
PAGE 24
fuselage. The C.G. is located 3-1/16" [78mm] back from the LE of the wing. This is where your model should balance for the first flights. Later, you may wish to experiment by shifting the C.G. up to 7/16" [11mm] forward or 7/16" [11mm] back to change the flying characteristics. Moving the C.G. forward may improve the smoothness and stability, but the model may then require more speed for takeoff and make it more difficult to slow for landing. Moving the C.G.
PAGE 25
Balance the Model Laterally Balance Propellers ❏ 1. With the wing level, have an assistant help you lift the model by the engine propeller shaft and the bottom of the fuselage under the TE of the fin. Do this several times. ❏ 2. If one wing always drops when you lift the model, it means that side is heavy. Balance the airplane by adding weight to the other wing tip. An airplane that has been laterally balanced will track better in loops and other maneuvers.
PAGE 26
ENGINE SAFETY PRECAUTIONS LITHIUM BATTERY HANDLING & USAGE Failure to follow these safety precautions may result in severe injury to yourself and others. WARNING!! Read the entire instruction sheet included with your battery. Failure to follow all instructions could cause permanent damage to the battery and its surroundings, and cause bodily harm! Keep all engine fuel in a safe place, away from high heat, sparks or flames, as fuel is very flammable.
PAGE 27
❏ 8. Radio Control ❏ 1) I will have completed a successful radio equipment ground check before the first flight of a new or repaired model. ❏ 2) I will not fly my model aircraft in the presence of spectators until I become a qualified flier, unless assisted by an experienced helper. ❏ 3) At all flying sites a straight or curved line(s) must be established in front of which all flying takes place with the other side for spectators.
PAGE 28
advance the throttle the plane will usually turn left slightly. Correct by applying sufficient right rudder to hold it straight down the runway. When the plane has sufficient flying speed, lift off by smoothly applying up elevator (don’t “jerk” it off into a steep climb!), and climb out gradually. Do not use flaps for your initial takeoff. After you have the feel of the Cherokee .40 ARF, takeoffs may be made with the flaps set at 50%. Flight We recommend that you take it easy with your Cherokee .