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HOKUSEI MODEL
RADIO CONTROLLED ALMOST READY-TO-FLY MOTOR POWERED
Primus EPP
Assembly/Operation Manual
* The above color scheme is for prototyping. Real products may differ.
Warnings:
RC models are not toys!
•
This product is designed for advanced hobbyists. It is
advised that less experienced users should consult people
who have experience in this type of models before starting
their build.
•
Small-size parts included in the kit may pose a danger to
young children. Please keep them in places that cannot be
reached by young children.
•
Always be a responsible RC flyer. Check your plane and
your flying field for safety before enjoying each flight.
•
Keep this manual for future consultation.
•
The product is an ARF kit. Not all parts have an exact fit
without some cutting or sanding.
* For better performance, the product design may be altered without notice.
Before your build, please carefully read this manual.
ALL-EPP AEROBATIC PLANE
* This manual is copyrighted by Hokusei.
* It is strictly forbidden to be republished and redistributed without permission.
Specifications:
Wingspan 870mm
Length 940mm
Total weight 360g (without battery)
2
Wing area 21.22dm
Recommended power set-up (motor)
AXI221-26 or Hyperion Z-2213-24
Prop GWS SF 1047 or 1147; or
Prop APC 1047 or 1147
Radio 4 to 6 channels, 4 servos and 1 ESC
Recommended batteries
LiPo 11.1V 600-800mAh
Not included: glass fiber tape, 3M Scotch 6225n
glue, instant glue and kicker.
Kit Contents
• 1 assembly/operation manual
• 1 EPP fuselage and main wing set
• x EPP stabilizers and control surfaces
• x EPP motor spacers
• 1 main gear (steel wire)
• 1 tail skid (steel wire)
• 1 set tail skid reinforcement material
• 1 plywood base for the main gear
• 2 wheels for the main gear
• 1 laser-cut plywood motor base
• 4 laser-cut plywood horn bases
• 8 laser-cut plywood servo frames
• 4 micro dual-root resin horns
• 1 set of push rods (3 short and 1 long)
• 2 EPP sheets for repairing
• 2 pieces of black-color Velcro
• x pieces of white-color Velcro
HOKUSEI SANGYO CO., LTD.
WINGSPAN: 870mm
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Table of Contents
Summary of Contents for Hokusei Primus EPP
- Page 1 * For better performance, the product design may be altered without notice. HOKUSEI SANGYO CO., LTD. * This manual is copyrighted by Hokusei. * It is strictly forbidden to be republished and redistributed without permission.
- Page 2 Before the build, please first get familiar with the EPP material. It is flexible and can stand some impact without being damaged. Even when it is damaged, the damage is often in the form of just some tears, which can be easily fixed with glue (e.g., 3M Scotch 6225n glue). 1.
- Page 3 3. Connecting Control Surfaces The positions of all hinges are marked. Please align the corresponding marks when connecting control surfaces. Make sure that control surfaces can freely rotate a sufficiently large angle around their hinge axes. All control surfaces need to be securely hinged. It could be dangerous if control surfaces are not properly connected with the airframe in flight.
- Page 4 4. Installing Servos The laser-cut plywood servo frames are of two kinds: the frames marked with an F are meant for Futaba servos, and the ones with a W are meant for Waypoint servos. You need to try to fit the servos into their frames first, then glue them to the airframe. Apply glue to each frame outside the hole for the servo.
- Page 5 5. Installing and Connecting Horns Cut off the roots of the horn for the elevator and make the gluing surface flat. Then glue the horn to the CF reinforcement strip on the elevator. Use the included z-shape wires and hot shrink tubes to make push rods. Each push rod is made of two z-shape wires wrapped with two or three segments of hot shrink tubes so that the length of the push rod can be adjusted.
- Page 6 6. Installing Motor and Closing the Upper Part of the Fuselage Use the EPP spacers as needed to accommodate motors of different sizes. Glue the plywood motor base to the fuselage and wrap the joint from top to bottom with glass fiber tape as reinforcement. Install the motor onto the plywood motor base with 4 self-tapping screws. (Use washers to create a right thrust.) Make sure that the motor rotates in the right direction.
- Page 7 8. Finishing Steps … The triangular-shape sheet is used to strengthen the tail part of the fuselage. It should be folded to fit the tail of the fuselage. Glue the sheet to the fuselage. Get the wire through the plywood piece and the triangular sheet. Insert the wire into the EPP fuselage.
- Page 8 Similarly, violent maneuvers such as blenders and snap-rolls may also lead to disintegration of the plane in the air. Please manage the throttle and flying speed wisely. Hokusei will not be held liable for such disintegration.
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