Instruction Manual Book PITTS Item code: BH85-A. New improvement. ALL BALSA - PLY WOOD CONSTRUCTION. COVERED WITH ORACOVER. 95% ALMOST READY TO FLY SPECIFICATION Wingspan: 1,500mm 59.06 in). Length: 1,330mm (52.36 in). Weight: 4.7kg (10.34 lbs). Wing area: 74dm2. Wing loading: 64 g/dm2. Wing type: Naca Airfoil. Spinner: 70mm. Gear type: Aluminium Hi-grade for main gear and spring wire for tail gear (included). Parts listing required (not included). Radio: 06 channels.
PITTS Item code: BH85-A Instruction Manual This instruction manual is designed to help you build a great flying aeroplane. Please read this manual thoroughly before starting assembly of your PITTS. Use the parts listing below to identify all parts. WARNING Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it is capable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOU ASSUME ALL RISK & RESPONSIBILITY.
PITTS Item code: BH85-A Caution: This model is not a toy! If you are a beginner to this type of powered model, please ask an experienced model flyer for help and support. If you attempt to operate the model without knowing what you are doing you could easily injure yourself or somebody else. Please keep your safety and well-being in mind at all times.
PITTS Item code: BH85-A Instruction Manual REPLACEMENT SMALL PARTS 4 3 2 4x20mm 10 3x10mm 4x30mm 2 1 3x12mm 2x10mm 5x45mm 8a 9 8 8b 1. Plastic - engine mount. 2. Wheels. 3. Wheel pants (left & right). 4. Aluminium landing gear. 5. Wing strut. 7. Tail gear set. 8. Fuel Tank 8a.Clunk. 8b. Stopper (three line). 9. Spinner. 10. Covering of main gear. 11. Wood - motor mount. 3 x 12mm 3x12mm 3x10mm 3x25mm 5 4x30mm 5a 11 4x70mm 5b 5c I.
PITTS Item code: BH85-A Instruction Manual Drill a hole 1.5mm Secure 2x10mm 5) Repeat the procedure to install the aileron servos in the other wing half. 3. INSTALLING THE AILERON CONTROL HORN Secure Electric wire 1) Remove the covering from the slot on the bottom of the aileron. 2) Insert the control horn into the slot and secure it by A+B Epoxy glue. 3) Using the thread as a guide and using mask- ing tape, tape the servo lead to the end of the thread: carefully pull the thread out.
PITTS Item code: BH85-A Using pliers, carefully make a 90 degree bend down at the mark made. Cut off the excess wire, leaving about 6mm beyond the blend. Instruction Manual Repeat the procedure to install the opposite wing half. II. INSTALLING THE ENGINE MOUNT See pictures below: Cut. Insert the 90 degree bend down through the hole in the control horn. Install one nylon snap keeper over the wire to secure it to the control horn.
PITTS Item code: BH85-A Instruction Manual Throttle pushrod OPTION 2: ENGINE MOUNT III. FUEL TANK 1. INSTALLING THE STOPPER ASSEMBLY 4x30mm 1) The stopper has been pre-assembled at the factory. 2) Using a modeling knife, cut one length of silicon fuel line (the length of silicon fuel line is calculated by how the weighted clunk should rest about 8mm away from the rear of the tank and move freely inside the tank).
PITTS Item code: BH85-A 5) Test fit the stopper assembly into the tank. It may be necessary to remove some of the flashing around the tank opening using a modeling knife. If flashing is present, make sure none of it falls into the tank. 6) When satisfied with the alignment of the stopper assembly tighten the 3mm x 20mm machine screw until the rubber stopper expands and seals the tank opening. Do not over tighten the assembly as this could cause the tank to split.
PITTS Item code: BH85-A Instruction Manual 3) Slide the cowl back over the engine and secure it in place using four wood screws. See picture below. Top side 4) Install the muffler and muffler extension onto the engine and make the cutout in the cowl for muffler clearance. Connect the fuel and pressure lines to the carburetor, muffler and fuel filler valve. cut away the tail block Trim covering Drill a hole 2.5mm 5) Drill four 2.
PITTS Item code: BH85-A Bottom side. Instruction Manual control horn Bottom side. Mark line. 1. A+B Epoxy glue 5) Remove the stabilizer. Using the lines you just drew as a guide, carefully remove the covering from between them using a modeling knife. When cutting through the covering to remove it, cut with only enough pressure to only cut through the covering it’s self. Cutting into the balsa structure may weaken it. This could lead to possible failure during flight. Top side. Remove the covering.
PITTS Item code: BH85-A Instruction Manual Bottom side C/A glue. Top side ELEVATOR SERVO INSTALLATION 1) Install the rubber grommets and brass collets into the elevator servo. Test fit the servo into the servo tray. C/A glue. 2) Mount the servo to the tray using the mounting screws provided with your radio system. Bottom side. Elevator servo Secure. Elevator pushrod Using pliers, carefully make a 90 degree bend down at the mark made. Cut off the excess wire, leaving about 6mm beyond the blend.
PITTS Item code: BH85-A Instruction Manual 3. RUDDER SERVO INSTALLATION VI. RUDDER INSTALLATION Rudder install as same as the way of aileron. Please see pictures below. Rudder servo install as same as method of elevator servo. Rudder pushrod Rudder servo Flaslink Pushrod wire Servo arm Snap keeper 1. RUDDER CONTROL HORN INSTALLATION Rudder control horn install as same as method of elevator control horn. VII. MAIN GEAR INSTALATION PARTS REQUIRED 1. A +B 2.
PITTS Item code: BH85-A Instruction Manual 2) Assemble and mounting the wheel pants as shown in the following pictures. 3x10mm Secure Aluminium landing gear VIII. MOUNTING THE TAIL WHEEL BRACKET Flat washer. M5 nut. Collar. 1) Set the tail wheel assembly in place on the plywood plate. The pivot point of the tail wheel wire should be even with the rudder hinge line and the tail wheel bracket should be centered on the plywood plate. Repeat the procedure to install the opposite gear.
PITTS Item code: BH85-A Instruction Manual Switch Drill a hole 2mm diameter 3) Secure the tail wheel bracket in place using three 3mm x 12mm wood screws. Be careful not to overtighten the screws. Secure X. INSTALLING THE RECEIVER AND BATTERY 1) Plug the servo leads and the switch lead into the receiver. You may want to plug an aileron extension into the receiver to make plugging in the aileron servo lead easier when you are installing the wing. Plug the battery pack lead into the switch.
PITTS Item code: BH85-A Aluminium tube. Instruction Manual 19mm. 481 mm Open and Close *** Test fit the aluminium tube dihedral brace into each wing haft. The brace should slide in easily. If not, use 220 grit sand around the edges and ends of the brace until it fits properly. Attach the aluminium tube into the fuselage. XII. INSTALLING COCKPIT FUSELAGE Please see pictures below. Pillot Push in Insert the wing panel as pictures below. A/B Epoxy glue. Push in 2.
PITTS Item code: BH85-A Position the canopy so the rear frame on the canopy is aligned with the rear edge of the cockpit opening. Use canopy glue to secure the canopy to the canopy hatch. Use low-tack tape to hold the canopy in position until the glue fully cures. Wrap the tape completely around the canopy hatch, as the tape does not stick well to the covering. We used balsa sticks to hold the lower edges of the canopy tightly against the canopy hatch.
PITTS Item code: BH85-A Instruction Manual 3x12mm 5b 5a 5c Secure Repeat the procedure to install the opposite wing half. Push in XIII. INSTALLING THE SPINNER Push in Install the spinner backplate, propeller and spinner cone. The spinner cone is held in place using two 3mm x 15 mm machine screws. Secure Top side low wing Push in BALANCING 1) It is critical that your airplane be balanced correctly. Improper balance will cause your plane to lose control and crash.
PITTS Item code: BH85-A 2) Mount the wing to the fuselage. Using a couple of pieces of masking tape, place them on the top side of the wing 106mm back from the leading edge, at the fuselage sides. 3) Turn the airplane upside down. Place your fingers on the masking tape and carefully lift the plane. Accurately mark the balance point on the top of the wing on both sides of the fuselage. The balance point is located 106mm back from the leading edge.
I/C FLINGT WARNINGS aerials or other dangerous areas including airports, motorways etc. behind the propeller, and do not allow any part of your body to be in line with the propeller. Always operate in open areas, away from factories, hospitals, schools, buildings and houses etc. NEVER fly your aircraft close to people or built up areas. DO NOT dispose of empty fuel containers on a fire, this can lead to an explosion.
