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OMP Hobby BIGHORN 49" Manual
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OMP Hobby BIGHORN 49" Manual

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OMP Hobby 49" Bighorn is a sport RC model airplane built in the traditional way: balsa and film cover.
The airplane features light yet strong structure, and abundant power, making the airplane easy to fly and
capable of a lot of advanced aerobatics, such as hover. The big wheels provide enough clearance for easy
takeoff and landing on grass field. Flaps (if equipped) of the airplane makes it ideal for short field takeoff
and landing, and air brake in crow configuration.
The optional 49" Bighorn receiver ready version is an almost completed finished kit in factory. Motor, ESC,
servos, Ailerons, flaps, elevator, are all installed. Landing gear is preassembled. Propeller is included in the
kit. It takes no more than an hour to put the kit together and ready for the sky.
Wingspan
49 in（1250mm）
Wing Area: 27.4dm² or 425
square inches
Motor: Sunnysky X2820
1100KV Outrunner
Propeller: SunnySky Eolo
12x6.5" electric propeller
www.OMPHobby.com
Length
41 in（1040mm）
Wing Loading: 49.7~51.5g/dm²
ESC: 40A
Servos: 6 (flap version) or 4
(non-flap version) of 17g
OMPHOBBY metal gear digital
servos.
www.OhioModelProducts.com
CG:
58 ‐ 66mm from the leading 
edge of main wings
Flying Weight: 1365~1410g
Battery: 3S 11.1V LiPo,
2200~3000mAh
Flight time: 5~12 minutes
1

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Summary of Contents for OMP Hobby BIGHORN 49"

  • Page 1 OMP Hobby 49” Bighorn is a sport RC model airplane built in the traditional way: balsa and film cover. The airplane features light yet strong structure, and abundant power, making the airplane easy to fly and capable of a lot of advanced aerobatics, such as hover. The big wheels provide enough clearance for easy takeoff and landing on grass field.
  • Page 2 Three color schemes available Package contents (receiver ready version) 1. Fuselage 2. Left half wing 3. Right half wing 4. Horizontal stabilizer 5. Rudder 6. Tube 7. Adhesive  Velcro 8. Spinner 9. Link Rods 10. Landing gear 11. Propeller...
  • Page 3 Main Features of the Airplane (receiver ready version) *Main landing gear has been assembled in  factory.           *All ball tie rods are preassembled.          *All servo horns have already been installed.       *All ball joints have been installed.             *Hinge slots are cut in factory. *Servo leads taped for easy access.           *The cowl is installed in factory. ...
  • Page 4 Horizontal stabilizer and elevator installation 1. Insert the horizontal stabilizer into the fuselage. 2. Insert the carbon tube of main wings into fuselage, to ensure that the horizontal stabilizer is parallel to the carbon tube. 3. Appy CA glue to secure horizontal stabilizer.

  • Page 5: Rudder Installation

    Rudder Installation 1. Insert rudder hinges into slots in vertical stabilizer. 2. Ensure that there is 1 ~ 2mm clearance between fuselage and rudder. 3. Apply thin CA glue to secure the hinges.

  • Page 6: Landing Gear Installation

    Landing Gear Installation 1. The mounting screws of landing gear are installed on the fuselage to prevent missing parts. 2. Take out the screws from the bottom of fuselage with 2.5mm Alan screwdriver. 3. Align the landing gear to the hole locations and tighten the three screws.

  • Page 7: Installation

    Installation of Tail Wheel Align tail wheel assembly to the rear bottom of fuselage as shown in the photos. Make sure the gear is centered and pivot is aligned to rudder hinges. Install screws at locations as shown in the photos.
  • Page 8 Installation of Servo Link Rods 1. Servo horns are installed at center position in factory. Hook servos to a receiver to check center point if necessary. 2. Level the control surfaces, and set rudder arms at 90 degree positions. 3. Adjust the link rod length by turning the ball joints to appropriate positions.
  • Page 9 Installation of Servo Link Rods (continued) 5. Electrify the servos to make sure all the control surfaces are installed in the center positions. Installation of Spinner Installation sequence of spinner parts: aluminum alloy base plate → propeller → washer → nut → spinner →...
  • Page 10 Recommended Settings of Dual Rates and Exponentials of Control Surfaces Low rate Low rate exp High rate High rate exp Ailerons Elevator Rudder Flaps For customer support in the USA, please  For customer support outside of the USA,  contact Ohio Model Products in Ohio. please contact OMPHobby in China. Tel: +1‐614‐733‐9488 (9am ‐5pm, ET) Tel: +86‐755‐8672‐4337 Email: support@omphobby.com Email: sales@omphobby.com Website: www.OhioModelProducts.com Website: www.OMPHOBBY.com Disclaimer and Safety • This product is not a toy. It is not recommended for children under age 14.  • Fly the airplane by abiding by local laws and rules. •...