FunJet

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Multiplex FunJet

The MultiPlex FunJet is an electric pusher-prop jet made of very durable Elapor Particle Foam Construction. It offers plenty of room internally for avionics in an attractive package.

Features

• Suggested Retail Price of $65 USD
• Elapor Particle Foam construction
• Assembles in minutes with only Medium CA glue
• Fiberglass Wing Spar
• Moderately priced
• Detachable canopy for access to internals
• Plastic Motor Mount
• Wide flight speed envelope (slow without stalling, through fast)

Specifications

• Wingspan: 31.29" (795mm)
• Wing Area: 232 sq in (15 sq dm)
• Weight: 21oz (620g) _all up_
• Weight w/o powerplant (for estimation): 330g
• Bare weight: 165g
• Length: 29.52" (750mm)
• Airfoils: Airfoil: Semi-symmetrical, mid wing at the fuselage sides

Payload Area

• Fuselage is 1.60" (40.6mm) wide x 20" long

Recommended Setups

Manufacturer Recommendation

Remember this is a hot sport plane so the manufacturers recommendation reflects typical desired performance and may not be the best match for UAV operations.

• Motor: Himax HB2815-3000 Brushless Motor
• Battery: 3S1P 2100-3200mah LiPo
• Servos: 2 Nano sized (HS-55)

Group Member Setups

Martin

• Motor: AXI 2212/26
• Battery: 3S1P 2100mAh LiPo
• Prop: 9x6

Matthew Currie

Multiplex FunJet

Multiplex FunJet

Multiplex FunJet

• Motor: AXI 2212/26
• Battery: LiPower Lites 3S1P 2100mAh 18C LiPo
• Prop: APC 9x6E (checked to draw ~ 11.5A)
• Receiver: Berg 4L
• Servos: 2x Hitec HS-55

Servos

Multiplex calls for 2 Hitec HS-55 or 2 HS-65 servos

Hitec HS-55

• MSRP: $13 USD
• Torque: 13/16 oz/in @ 4.8/6.0v
• Speed: 0.09/0.08 seconds/ 60deg @ 4.8/6.0v
• Weight: 0.29 oz (7.8g)
• Size: 0.9 x 0.46 x 0.95"

Hitec HS-65HB

• MSRP:
• Motor Type: 3 Pole Ferrite
• Bearing Type: Top Ball Bearing
• Torque 4.8/6.0v: 22 / 26 oz (1.6 / 1.9 kg.)
• Speed 4.8/6.0v: 0.16 / 0.13 second
• Size: 0.9"x 0.5"x 0.9" (24 x 12 x 24m)
• Weigh : 0.39oz. 11.2 g.

Recommended Motors

Himax HB2815-3000 Brushless Motor

PDF Datasheet

• MSRP $69.95 USD
• Dimensions: 27mm x 38mm
• Weight: 86g
• KV: 3000
• Max Amps: 30A
• Max Watts: 275W

AXI 2212/26

http://www.modelmotors.cz/index.php?page=61&product=2212&serie=26&line=GOLD

MSRP $69.95 USD

• Dimensions: 1-3/32" diameter, 1-3/16" case length, 3.17mm (1/8") shaft
• Weight: 57 g
• KV: 920
• Max Amps: 12A
• Max Watts: 275W
• Prop's:

9x6, 24.5 ounce thrust, 14:12 full throttle.

8x6, 19.5 ounce thrust, 19:38 full throttle.

Funjet Back Plate Construction

Funjet back plate construction components

• A suitable precursor for the back plate is 5mmx75mmx75mm balsa sandwiched by 1mmx75mmx75mm plywood. The laminating adhesive used was PVA glue. The sandwich was left to dry overnight clamped by similar size wooden plates in a vice.

• An outline of The 7mm elapor profile, cut from the back of the Funjet canopy, is drawn in a CAD/CAM program.

• download Funjet back plate CADopia drawing (pdf)

• A laser cutting firm transferred this outline to CorelDraw and cut an acrylic (Perspex) template.

• download Funjet back plate CorelDraw drawing (pdf)

• The balsa/plywood sandwich was attached by double sided tape to the acrylic template and the correct outline achieved by routing around the acrylic border.

Funjet back plate fitted

Tiny v2.1 in a Funjet

• The fitted plate looks remarkably similar to that displayed in the image on the right found on the main page of the wiki.

Online Discussion on FunJet topics

• Modifying the motor cowling to increase airflow
• Adding prop spacers to move prop further back
• Mounting a MicroDan 2505 Brushless Outrunner college essay

Photos

Included Motor Mount

Example of high visibility paint job

Idea for wing tip skid

Misc Notes

• Multiplex FunJet Instruction Manual - English
• Multiplex FunJet Instruction Manual - Original Multilanguage
• Painting Elapor should be primed primer
• Fiberglass wing spar: 22.5" (571mm) x .25" (6.35mm)
• Motor Screws (to hold plastic motor plate to plastic motor cowl) are slot head and appear to be 3.0mm x 0.5mm (thread) x 16mm long
• Screws for AXI "outrunner" motor are 3.0mm Diameter x 0.5mm Thread x 6 mm Length