.55-.72 GP 55 EP INSTRUCTION MANUAL SPECIFICATIONS Wingspan: Length: Weight: Wing Area: Wing Loading: 69 in [1753mm] 47-3/4 in [1213mm] 7.5 – 8.25 lb [3400 – 3740 g] 493 in 2 [31.8 dm 2 ] 35 – 39 oz/ft 2 [107– 119 g /dm2 ] Engine: .46–.55 [7.5– 8.9cc] two-stroke glow engine or .70–.72 [11.5– 11.8cc] four-stroke glow engine Electric: RimFire .55, O.S. 50 Motor Radio: 6-channel WARRANTY Great Planes ® Model Manufacturing Co.
TABLE OF CONTENTS INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Academy of Model Aeronautics . . . . . . . . . . . . . . . . . . 2 SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 3 DECISIONS YOU MUST MAKE. . . . . . . . . . . . . . . . . . . . . 3 Engine Recommendations. . . . . . . . . . . . . . . . . . . . . . 3 Motor Recommendations. . . . . . . . . . . . . . . . . . . . . . . 3 Flight Battery Recommendations. . . . . . . . . . . . . . . . .
SAFETY PRECAUTIONS DECISIONS YOU MUST MAKE Protect Your Model, Yourself & Others… Follow These Important Safety Precautions This is a partial list of items required to finish the Cirrus SR22 ARF that may require planning or decision making before starting to build. Order numbers are provided in parentheses. 1. Your Cirrus SR22 ARF should not be considered a toy, but rather a sophisticated, working model that functions very much like a full-size airplane.
❍ Stick-on segmented lead weights (GPMQ4485) ❍ 36" Metal Ruler (HCAR0475) ❍ Pliers with wire cutter (HCAR0625) ❍ Dremel® Moto Tool and cutting bits Radio Equipment The Cirrus SR22 ARF requires a 5-channel (6-channel if using the optional lights) radio system with three standard servos with 44 oz-in of torque and four micro servos with 39 oz-in of torque.
Mail parts orders and payments by personal check to: 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.
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. ❏ ❏ 3. Noting the grain direction, use 6-minute epoxy to glue the two 3/16" x 3/8" x 1/2" [4.8 x 9.5 x 12.7mm] hardwood blocks to the bottom of the aileron servo cover. ❏ 2.
❏ ❏ 6. Use the string in the wing to pull the aileron servo ❏ ❏ 10. Position the control horn so that it is inline with the aileron servo horn and the clevis pin is aligned with the aileron hinge line. On the aileron, mark the two mounting holes. Remove the control horn and drill a 1/16" [1.6mm] pilot hole at each mark. Do not drill completely through the aileron. Attach the control horn using two #2 x 3/8" [9.5mm] sheet metal screws. Use thin CA to harden the holes. wire through the wing. ❏ ❏ 7.
Use the servo cover as a guide to drill 1/16" [1.6mm] holes through the plate in the wing. Secure the cover using four #2 x 3/8" [9.5mm] sheet metal screws and four #2 flat washers. ❏ ❏ 1. Connect a 9" [229mm] servo extension to one of the Use thin CA to harden the screw threads. flap servos. Cut a piece of black heat shrink tubing in half. Slide the heat shrink tubing over the connector. Shrink the ❏ ❏ 6. Thread a nylon clevis 20 turns onto the end of a 2-56 tubing by heating it.
Install the Main Landing Gear ❏ ❏ 4. Apply a drop of thread locker to the threads of a 6-32 x 1/4" [6mm] socket head cap screw. Slide a 4mm wheel collar onto the axle. Thread the 6-32 x 1/4" [6mm] socket head cap screw into the wheel collar and tighten it on the flat at the end of the axle. ❏ ❏ 1. Locate the fiberglass left main landing gear by fitting the main gear in the recess in the left wing.
ASSEMBLE THE FUSELAGE Install the Stabilizer ❏ 4. Use epoxy to glue the two 1/8" x 5/8" [3 x 16mm] nylon stabilizer dowels 5/16" [8mm] into the root of the stabilizers. ❏ 1. Insert the carbon fiber wing joiner tube in the fuselage. Slide the two wing halves onto the tube and secure the wing halves to the fuselage with two 1/4-20 nylon wing bolts. ❏ 5. Slide the 5/16" x 9-3/4" [8 x 248mm] aluminum stabilizer joiner tube through the fuselage.
❏ 8. Gather together a couple of sheets of paper towel, the way into the elevator halves. Use a toothpick to remove denatured alcohol, mixing cup, mixing stick, epoxy brush, 8" any excess epoxy the squeezes out. Then, fit the elevator [203mm] or longer wire (not included) and 30-minute epoxy. halves the rest of the way on. Move the elevator up and down a few times to help align ❏ 9. Mix together 1/2 oz. [15cc] of 30-minute epoxy.
Install the Nose Gear ❏ 4. Position the control horn on the elevator so that the four holes on the control horn are inline with the elevator hinge line. Mark the two control horn mounting holes on the elevator. Remove the control horn and drill a 1/16" [1.6mm] pilot hole at each mark. Do not drill completely through the elevator. Attach the control horn using two #2 x 3/8" [9.5mm] sheet metal screws. Use thin CA to harden the holes. ❏ 1. File a flat spot at the end of the nose gear axle.
❏ 3. Use sandpaper to roughen the nose gear wire (where ❏ 6. Install the nose gear axle assembly on the nose gear shown) and the slot in the wheel pant. Then clean both areas with a paper towel dampened with denatured alcohol. wire. Tighten the set screw on the flat spot at the end of the nose gear wire. ❏ 4. Insert the nose gear wire in the wheel pant. Apply a drop of thread locker to a 6-32 x 1/4" [6mm] socket head cap screw. Thread the cap screw into a 4mm wheel collar.
❏ 9. Install the nylon nose gear steering block to the front of the fuselage with four 6-32 x 5/8" [16mm] socket head cap screws, #6 flat washers and #6 lock washers. Apply a drop of thread locker on the threads of the cap screws before installing. ❏ 12. Insert the bent end of the pushrod in the outer hole of the steering arm. Slide the pushrod in the hole in the firewall. Insert the nose gear wire in the nose gear block and through ❏ 10. Cut a 2-56 x 36" [914mm] metal pushrod in half. the steering arm.
Install the Motor Note: If you are installing a glow engine, proceed to page 17, Install The Engine. ❏ 14. Make a bend in the steering pushrod so that it is aligned with the screw-lock pushrod connector. Center the servo arm and nose wheel. Cut the steering pushrod 1/4" [6mm] past the pushrod connector. Insert the steering pushrod in the pushrod connector. Apply a drop of thread locker to the threads of a 4-40 x 1/4" socket head cap screw.
❏ 4. Attach the motor box to the firewall with four 6-32 x 5/8" [16mm] socket head cap screws, #6 flat washers and #6 lock washers. Be sure to apply a drop of thread locker to the threads of the cap screws. ❏ 5. Assemble the motor following the instructions included with the motor. Attach the motor to the motor box with four 6-32 x 1/2" [13mm] socket head cap screws, #6 flat washers and #6 lock washers. Be sure to apply a drop of thread locker to the threads of the cap screws.
❏ 7. Make a hole in the front of the fuselage to route the battery plug and ESC control wire into the fuselage. Plug the ESC into the receiver. Connect the three motor wires to the ESC. See page 21, step 5 for hole location. Install the Engine ❏ 8. Cut three 1" [25.4mm] long pieces of hook material (the rough material) and glue it to the battery tray using CA glue. ❏ 9. Glue a strip of loop material to the side of the motor battery. ❏ 1.
❏ 7. Make the throttle pushrod by threading a nylon clevis 20 turns onto the leftover 2-56 x 17-1/2" [444mm] metal pushrod (previously cut from the 36" [914mm] metal pushrod). Slide a silicone clevis retainer over the clevis. ❏ 3. Install the engine on the engine mount with four 6-32 x 1" [25.4mm] socket head cap screws, #6 flat washers and #6 lock washers. ❏ 8. Insert the throttle pushrod into the outer pushrod tube in the firewall.
connector with a nylon retainer. Switch on the radio system. Center the throttle stick on the transmitter and install a servo arm on the throttle servo perpendicular to the centerline of the servo. Install the Fuel Tank ❏ 1. Insert the one long and two short aluminum tubes through the large fuel tank stopper plate, rubber fuel tank stopper and the small fuel tank stopper plate. Thread the fuel tank stopper screw into the small fuel stopper plate. Do not tighten the screw. ❏ 2.
❏ 4. Place the plywood fuel tank spacer over the neck of the fuel tank. ❏ 7. Install the muffler and connect the fuel line from the pressure tube to the muffler. The end of the muffler screw may need to be filed down if the screw is hitting the fuselage. Install the Cowl ❏ 5. Install three pieces of fuel tubing (not included) on the aluminum tubes exiting the fuel tank. Mark the pressure tubing. Glue a piece of RC foam to the fuel tank tray. This will keep the fuel tank from sliding around.
❏ 2. ❏ 5. On the left front side of the fuselage, cut a hole to route Remove the muffler. Install the cabin/hatch on the fuselage. Slide the cowl over the engine or motor. Trim the bottom of the cowl to fit around the nose gear. the landing light wires into the fuselage. Electric Only: Route the landing light wires through the same hole the ESC wires pass through. Electric Only: Also open the intake on the left side of the cowl for better motor cooling. Then, proceed to step 5. ❏ 3.
❏ 7. Insert the landing light wires through the hole in the front of the fuselage. Position the cowl on the fuselage. Install the spinner backplate on the prop shaft. Position the cowl so that it is centered on the spinner backplate. Tape the cowl in position. Electric Only: With the RimFire .55 or O.S. .50 motor, the center of the spinner backplate will need to be enlarged to 5/16" [8mm]. ❏ 8. Drill a 1/16" [1.6mm] pilot hole through the cowl and cowl blocks.
Install the Receiver Battery ❏ 4. If the plane is nose heavy, wrap the receiver battery in R/C foam and secure it between the servos with a hook and loop strap. If the plane is tail heavy, the receiver battery can ❏ 1. Secure the cabin to the fuselage with two 4-40 x 3/8" be mounted under the front of the battery tray. [9.5mm] machine screws and #4 flat washers. ❏ 5.
❏ 3. Now is a good time to organize the wires in the fuselage. ❏ 6. Glue the cabin bottom cover in place. Connect the aileron and flap servos to the Y-harnesses. Straps to hold the wires in position can be made from #64 rubber bands (not included) cut into strips. The strips can be glued over the wires. Remember, the wires from the wings cannot be strapped down if the wings are to be removable. ❏ 7.
Please use the following pictures and box top as a guide for the decal placement. GET THE MODEL READY TO FLY Balance the Model Laterally ❏ 1. With the wing level, have an assistant help you lift the model by the propeller shaft and the bottom of the fuse 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.
Set the Control Throws At the Servos To ensure a successful first flight, set up your Cirrus SR22 ARF according to the control throws specified in this manual. The throws have been determined through actual flight testing and accurate record-keeping, allowing the model to perform in the manner in which it was intended. If, after you have become accustomed to the way the Cirrus SR22 ARF flies, you would like to change the throws to suit your taste, that is fine.
Balance the Model (C.G.) More than any other factor, the C.G. (center of gravity/ balance point) can have the greatest effect on how a model flies and could determine whether or not your first flight will be successful. If you value your model and wish to enjoy it for many flights, DO NOT OVERLOOK THIS IMPORTANT PROCEDURE. A model that is not properly balanced may be unstable and possibly unflyable.
The engine and motor get hot! Do not touch during or right after operation. Make sure fuel lines are in good condition so fuel will not leak onto a hot engine, causing a fire. CAUTION: Unless the instructions that came with your radio system state differently, the initial charge on new transmitter and receiver batteries should be done for 15 hours using the slow-charger that came with the radio system.
❏ 14. Make sure the fuel lines are connected and are not 4) I will operate my model using only radio control frequencies currently allowed by the Federal Communications Commission. kinked. ❏ 15. Balance your propeller (and spare propellers). ❏ 16. Check that the spinner bolt is tight. ❏ 17. Place your name, address, AMA number and telephone number on or inside your model. This is an AMA rule (see page 31 of this manual). ❏ 18.
to overshoot, smoothly advance the throttle (always ready on the right rudder to counteract torque) and retract the flaps when enough airspeed is gained. Climb out to make another attempt. When the model is a foot or so off the deck, smoothly increase up elevator until it gently touches down.
This model belongs to: Name Address City, State, Zip Phone Number AMA Number 31
