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Silent 2 Electro

The SILENT 2 Electro is the only self-launching sailplane incorporating the Front Electric Self-Launcher/Sustainer (FES) in serial production.
The aircraft is capable of both unassisted take-off and periods of powered flight – as may be necessary to sustain soaring flight.

 

 

Electric Self-Launch Sailplane FAI CLASS 13.5m

The SILENT 2 Electro is the only self-launching sailplane incorporating the Front Electric Self-Launcher/Sustainer (FES) in serial production. The aircraft is capable of both unassisted take-off and periods of powered flight – as may be necessary to sustain soaring flight.
The highly efficient 22kW brushless electric motor installed in the nose is powered from two purpose built rechargeable Lithium battery packs and drives a folding propeller.
The power chain is aerodynamically clean and operationally very simple compared to a retractable power plant. It is also effectively maintenance free.
A typical self-launch will require a ground run of about 100m on a hard runway (~120m on grass) and can be expected to consume about 20% of the available battery capacity, leaving about 40 minutes of power available for use as a sustainer. There is no forward pitch moment on take-off and the motor delivers the same performance regardless of altitude.
Two purpose built Lithium battery packs, with built-in Battery Management System and a combined capacity of 4.4kWh are located behind the cockpit; very close the centre of gravity. Weighing just over 15kg each they are easily removed for charging.

timbro-faiDesigned for the new FAI 13.5m class, every component of the glider is built to the very highest standard and everything is incredibly light!  All control linkages are automatic; rigging could not be easier!

With a maximum take of weight (MTOW) of 300kg (or 313,5 kg if equipped with the optional ballistic recovery system) and a stall speed of less than 65 kph (35 kts) the aircraft is de-regulated in terms of air worthiness in most countries.

The glider is trimmed in pitch via an innovative variable-position horizontal stabiliser. The incidence of the horizontal stabiliser is governed by the flaperon setting; the five settings of the flap control produce corresponding changes in the incidence of the stabiliser, thus defining the trim airspeed in relation to the flap setting while the conventional elevator minimizes trim drag.

Thanks to the near full span flaperons, the SILENT 2 Electro soars effortlessly, even in the lightest air yet penetrates well, while the highly innovative drive chain delivers clean and efficient power – at the turn of a knob. The aircraft is a delight fly!


Wingspan

13.5 m, 44.55 ft

Wing area

9 m², 95.8 ft²

Aspect Ratio

20:1

Fuselage length

6.34 m, 21 ft

Empty weight (Typ)

200 kg, 441 lb

Maximum pay load (Typ)

100 kg, 220 lb

Wing load factors

+5.3g/-2.65g (at 150kph and 315kg)

Maximum wing loading

35 kg/m2 (at 315 kg)

Best glide (VbL/D)

1:40 at 90kph, 1:40 at 48 kn

Minimum sink (VbMS)

0.6 m/s at 85kph, 1.12 kn at 46 kn

Stall speed (VS)

< 65kph, <35 kn

Manoeuvring speed (VA)

150 kph, 81 kn

Maximum speed (VNE)

220 kph, 119 kn

Motor power

22 kW

Motor weight

9.5 kg

Propeller diameter

1 m

Propeller speed (max)

4,500 rpm

Battery capacity (max)

4.3 kWh

Rate of climb (max power)

>2 m/s, >4 kn

Details

Key features:

• SILENT 2 Electro – 13.5m, electric, self-launching sailplane.
• The Front Electric Self-Launcher (FES) is very efficient, simple to operate and aerodynamically clean. 

• Highly reliable electric brushless motor delivers instant, variable power and is effectively maintenance free.
• Consistent performance, regardless of altitude.

• No forward pitch on take-off and no change of centre of gravity when the motor is deployed.
• No flammable liquids on-board and environmentally very clean.
• Ample electrical power to sustain even the most sophisticated panel!

• Retractable main wheel – with wheel brake operated via the air-brake lever
• In-flight adjustable rudder pedals.
• Removable winglets.
• Front hinged canopy – with clear-view panel and integrated scoop
• Fixed or steerable tail-wheel
• Self connecting controls – for all control surfaces
• Lightweight composite sandwich wing skins – with pultruded Carbon spars and integrated air-brakes. Each wing-panel weighs just 34 kg. Rigging could not be easier!
• Generous and highly effective 11m flaperons – with 5 flap settings.
• Effective T-Tail – with generous rudder, integrated radio antenna and 3-way probe.
• Elliptical horizontal tail-plane – incorporating a variable incidence stabiliser and a conventional elevator
• The tailp-lane is automatically trimmed – via an innovative variable incidence stabiliser set in accordance with the flap setting.
• Both winch and aero-tow hooks are available as options – leaving the full capacity of the batteries available for use as a sustainer.
• The aircraft is De-regulated in most countries – leaving maintenance in the hands of the owner/pilot.
• Options for integrated Ballistic Recovery System, LED strobe, anti-collision markings, and much more.