GRAUPNER Skalar, Manual

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elektro
Skalar
2
Introduction
The
elektro Skalar
is a high-performance electric helicopter which offers extreme flexibility in
terms of power system and rotor size. The model is designed for use with a brushless out-run-
ner motor, a speed regulator (for constant RPM) and LiPo flight batteries with 5 … 10 cells.
In its basic form the model’s rotor diameter is 1365 mm, and power comes from a Compact
555/20V brushless out-runner motor in conjunction with an 8-cell LiPo battery. In this configura-
tion the helicopter is capable of flying in a highly dynamic style, including classic aerobatics and
“3-D” manoeuvres, and its performance is entirely the equal of a comparable glow-powered
model. Fitting a 10-cell LiPo pack instead of an 8-cell one provides a substantial increase in the
power reserves required for demanding (“3-D”) flying.
However, it is also possible to operate the model with a (relatively low-cost) 5-cell LiPo battery if
you install a Compact 555/18.5V motor; the result is a smooth-flying model suitable for a less
energetic piloting style.
At the other extreme you have the option of fitting the higher-torque Compact 655/20V motor, in
which case the model can be operated with 8 to 10 LiPo cells and a larger rotor diameter of
around 1500 mm. This system can then be installed in one of the numerous enclosed fuselages
in the Graupner/Heim helicopter system; alternatively it can be fitted with the separately available
tail boom (approx. 80 mm longer) to form an open-style (pod-and-boom) model.
The flight times which can be achieved vary primarily according to the motor, the flight battery,
the selected rotor blades and the mechanical set-up; a typical example would be around 15 min-
utes with eight 4.8 Ah cells.
The flight batteries are positioned at the bottom of the helicopter in a strong, lightweight tray
which is housed inside the chassis. The tray is assembled from machine-cut carbon fibre plates;
access is good, and the batteries can easily be replaced.
The tall chassis provides adequate tail rotor ground clearance in conjunction with the curved tail
boom, through which the tail rotor shaft runs in a curve, eliminating the problem of oscillation.
The helicopter’s large tail rotor diameter provides excellent control response around the vertical
(yaw) axis. The tail rotor is actuated by a free-running, slop-free CFRP pushrod, and is driven in
auto-rotation mode.
The lightweight mechanics fairings is moulded in GRP and supplied pre-painted; it is mounted
on rubber grommets to absorb vibration, and can be fitted and removed in moments, providing
excellent and speedy access to the radio control components and mechanical system.
The long black eloxided tail boom is adequately supported by four braces, and can be replaced
in a matter of minutes if damaged; its length is designed to allow the use of a range of rotor
blades, giving possible main rotor diameters of 1160 to 1365 mm.
The
elektro Skalar mechanics kit, Order No. 4476 , is designed to be installed in any suitable
fuselage in the Graupner/Heim system. It contains the main chassis including main rotor head,
plus tail rotor and tail rotor gearbox, but excludes the tail boom, skid landing gear, main rotor
blades and cabin.
Specification
Length excl. rotor approx. 1310 mm
Width excl. rotor approx. 240 mm
Height approx. 430 mm
Rotor Ø range 1160...1365 mm
All-up weight min. approx. 4000 g