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Minicopter Joker
2
Video
1(18 Meg)
Video
2 (24 Meg)
Based on the great success of the Joker
and on the experience gained a completely new model
was created, which employs the latest technical advances
in the electric flight sector.
The Joker 2 is more flexible and allows for a much wider
choice of motor and controller.
Following the high praise given to the Acrobat we have
decided to adopt the complete main gear
and tailrotor design and specification from this 3D-model.
So a model was created with a unique spectrum of practical
usage and great flexibility.
The Joker 2 can be used as pure beginner model as well
as for daily 3D-flights or for commercial
usage. The life time of the mechanics is many hundreds
of flight hours
without needing to replace parts, so the maintenance
costs are very low.
For Extreme-3D usage extra strong components now availbale,
which makes the Joker 2 into one of the most powerful
helicopters available today.
The noise of the model is substantially reduced by employing
a very quiet belt drive.
Master data
Fully Aerobatic Electrical Helicopter
using 10-12 Lipo or 28-32 NiCd/NiMH cells
Main rotor diameter: 1560 mm
Tail rotor diameter: 290 mm
Weight: Lipo: 4,5 – 5,0 kg (9,9 - 11,0 lb); NiCd:
5,2 – 5,5 kg (11,4 - 12,0 lb).
Flight time: Lipo: 8-20 min; NiCd: 5-8 min, NiMH; 6-12
min dependent on flight style and rotorspeed
The Power
Motor and gear
Brushless-motor with 8mm-shaft of your personal preference;
we recommend: Kohler actro (self cooling thru the out-runner
principal plus massive torque) or Plettenberg HP 370/40/A2
Two stage gear with quiet belt drive in the first stage
and spur gear in the second stage; gear reduction alternatively
from 9,0 to 11,6:1 dependent on motor and usage.
Adjustable motor mount for correct adjustment of belt
tightness.
Right or left turn of the mainrotor.
Autorotation clutch with two needle bearings in the
first gear stage, so the tailrotor is driven during
AR, stationairy tailrotor is also possible.
Tail rotor drive directly from the first stage, so
less power is lost. Tail rotor gear transmission 4.79:1.
The gear system is fully covered by the canopy for
maximum noise reduction.
Tail rotor drive with silent toothed belt and special
rollers for higher power transmission.
Easy to change ball bearings in the drive chain.
Large separation of the main rotor shaft bearings for
high torque transmission from rotor to frame.
All servos mounted in the drive train frames to save
space using high-grade push-pull linkage for high-precision
swash-plate control.
Tail system
Light weight
Simple structure
easy to service
fully ball raced bellcranks
CNC tail pitch slider with links
Left and right mounting possible
CF-vertical stabilizer with well formed fin
CF-Elevator
Aluminium blade grips with propeller moment weights
Two radial and one thrust bearing in each blade grip
Rigid tail rotor hub
The frame
High strength, light weight, technically optimized construction
yielding a tortionally stiff frame system made from
2,0 mm carbon plates.
Side profiles have cut-outs for weight reduction.
Lower side frame (standard wide 60 mm) can be widened
with spacers for battery types with bigger dimensions.
Full aluminium landing gear with stainless steel clamps,
CF-landing gear as option.
Battery mounting either with self-locking Velcro-tabs
or two mounting bolts.
Battery is freely position able for optimizing the
CG.
Central position of receiver for short cables to servos/esc/gyro
Front spacer panel can be tilted to optimize the position
of the Esc and to aid cooling air flow.
Enclosed front battery carrier for maximum battery
protection, 60 mm wide, 70 mm high.
Gyro mount on the tailboom
Who should fly the Joker
Beginners and sports fliers
Expert fliers
Competition fliers F3C
Scale pilots for use in fuselages
3D-fliers and Extreme-3D-fliers
Private or commercial camera usage
Kit content
CF-frame
Aluminium landing gear
Main gear
Swashplate
MFS-mainrotor head
Tailboom with support
CF-Tailrotor linkage
CF-tail fin
Tailrotor gear
Tailrotor with PP-tailrotorblades
Canopy yellow or white with smokeglass window
Battery mounting parts
Small parts
Decals
Manual on CD-ROM
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