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Dashing and superbly-equipped. Excellent performance and handling. StingSport is a complete and deluxe airplane. by Dan Johnson
 
The StingSport overflies a green Czech valleyPerformance & Comfort

Performance and comfort are the perfect partners. Behind the Sirius - the new high wing carbon composite aircraft from TL Ultralight - stands the experience of more than 650 of its low wing siblings, the Star and the Sting. It is a refined aircraft with elegant contours, superb flight performance and unmatched comfort in the cockpit. These features, together with the company's trademarks of meticulous fit and finish, durability, reliability and ease of handling, make the Sirius the perfect travel partner for relaxed and luxurious flying.

The StingSport overflies a green Czech valleyNew benchmarks in comfort and ergonomics.
The Sirius sets new benchmarks in comfort and ergonomics. The well-appointed cockpit is easily accessible and offers generous space for pilot and passenger, with 46 inch cabin width, deluxe cushioned, body-countoured seats, ergonomically designed control and operating systems, dual yoke controls for aileron and elevator, electric flaps and a spacious baggage compartment.

The view of the ground is excellent – thanks to the high wings. Like the Sting, the Sirius also runs very smoothly – low vibration and a very low noise level (58 dbA) contribute to the feeling of pure enjoyment.

The StingSport overflies a green Czech valleyPowerful, versatile, reliable.
Once in its element, the Sirius shows its full potention: it transforms engine power efficiently into cruising speeds up to 120 knots and aero towing for gliders up to 1,587 lbs. Its range is enormous. The 34 gal standard tank offers 6 to 7 hours of safe flight endurance with a range of 700 to 800 miles.

The Sirius combines high performance and docile flight characteristics, its controls are agile and maneuverable and it is predictable during landing and touch-down procedures.

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Fabrication of the StingSport / Sting S3 roll barDesign/Construction

Pilots of light sport aircraft want performance and usability comparable to standard category aircraft. Those were the criteria that guided the design of the Sirius.

The Sirius was designed with the aid of virtual CAD prototyping and refinedthrough extensive physical prototyping and testing. The result is an airplane that offers dimensions and capacities equivalent to higher weight categories, with even better performance and economy.

To realize the benefits of the Sirius’s design in a production aircraft, TL-Ultralight overhauled its manufacturing process. Highly accurate CNC machine technology now performs repetitive tasks with great precision. The Sirius is light, strong and safe, with a comfortable interior, a tough airframe and exceptional performance.

Fabrication of the StingSport / Sting S3 roll barThe Sirius has a tapered wing, fixed horizontal and vertical stabilizers, effective flaps and powerful elevator, rudder and aileron surfaces. Conformal cowling follows the engine contours, directing cooling air precisely to the areas where it is needed. This permits the use of smaller air inlets, presents less frontal and wetted area and reduces drag.

The Sirius is built with composite-reinforced epoxy structures. For weight-savings and superior strength, carbon fiber products comprise approximately 85% of the reinforcing materials. The wing surfaces and fuselage are made from carbon/epoxy sandwich construction cored with closed-cell foam and assembled with epoxy adhesives. Wing and fuselage skins are vacuum bagged and oven cured. Wing spar caps and other heavily loaded components are autoclaved.

Fabrication of the StingSport / Sting S3 roll barGRP (fiberglass), used in the landing gear, dampens impact well and makes the Sirius forgiving of even hard landings.

High-quality molds and care in layup yield a sleek, paintable exterior surface without the need for gel coat, saving 50 pounds of non-structural dead weight. Wings, fuselage and empennage are finished in white, two-part epoxy paint. Colorful graphics are available in vinyl, applied over the painted finish.

Passenger and pilot are enclosed in the carbon-fiber-reinforced cockpit cage with integral rollover protection.

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The standard Rotax 912ULS 100 hp engine in the StingSport and Sting S3Power & Prop

The 100 peak horsepower Rotax 912 ULS four cycle, four cylinder engine is lightweight, powerful, well-proven and reliably flown all over the world. We mount it with an oversized radiator and oil cooler, and a three-bladed, ground-adjustable Woodcomp composite propeller that is perfectly matched to engine and airframe.

Rotax is a subsidiary of Bombardier Recreational Products and the world's leading supplier of aircraft engines for light aircraft.

The 912 ULS produces 100 peak horsepower at 5800 rpm and 95 horsepower at 5500 rpm in continuous operation, and burns 92 octane unleaded auto fuel or 100LL aviation fuel. Cylinder heads are liquid-cooled, utilizing an oversized radiator, to increase operating efficiency and allow optimum power extraction under all operating conditions. The coolant also provides a CO-free heat source for the cockpit and for the carburetor de-icing system, which operates full-time without causing power degradation.

The Woodcomp 3-blade ground adjustable wood/composite propeller in the StingSport and Sting S3DUC Propellers
The DUC Swirl is a simple, ground-adjustable propeller that performs like a complex constant-speed prop. It is the propeller of choice for faster airplanes.

The blades of the Swirl propeller are designed to adjust the effective angle of attack under differing aerodynamic loads to optimize performance while maintaining engine RPM in the optimal torque range. This is done without movement or twisting of the blades. As a result, the DUC Swirl propeller has a constant speed effect, even though the pitch is set on the ground.

The prop takes a slimmer bite under load, and a fatter bite when cruising, without the need for complex electro-mechanical adjustments. Thanks to this effect, there is very little variation of RPM engine between static and dynamic loads. Duc propellers perform better through the whole of the flight envelope, exhibiting:

  • Constant speed effect in a simple, not complex, propeller
  • Better effectiveness on takeoff and climb due to higher engine speed
  • Better cruise speed for a given RPM
  • Very smooth operating characteristics

In the INCONEL version, the Swirl has the same advantages as the standard version. The Inconel Swirl blade has a very hard Inconel stainless steel insert to protect the leading edge. This propeller is well suited to a hostile environment (sand, gravel, etc....)

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Inside a typical StingSport or Sting S3 cockpitLuxury Inside

The Sirius has a spacious and very comfortable cabin, with contoured side-by-side seating providing absolute comfort after many hours of flight. The ergonomic cockpit layout promotes confident flying. All the controls are well-arranged and located within the pilot’s easy reach.

The layout of the instrument panel facilitates a quick and easy scan. Steering yokes with PTT, and adjustable rudder pedals with toe brakes are provided for both pilot and co-pilot.

In the cabin the pilot can also visually check the content of fuel tanks. The inside of the cabin is lined with high quality carpet.

Inside a typical StingSport or Sting S3 cockpitFour point, inertia reel harnesses are standard, as is fresh-air sourced cabin heat and very effective ventilation.

The cabin has a large baggage compartment with the cargo volume of a Honda Accord (over 14 cubic feet) and a carrying capacity of 75 pounds. Large doors which open upwards towards the wing, locking in place, allow unobstructed and easy access for pilot and passenger. The low noise cockpit is well organized and comfortably appointed for hours of flying fun.

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A typical analog instrument panel in the StingSport or Sting S3 How It Flies

The Sirius has been constructed to offer the crew the ultimate in comfort, ease of entry and ergonomic design where every control falls perfectly in place.

Cabin Entry
The large doors on the Sirius open upwards and are held in place by hydraulic struts, making entry and exit into the aircraft easy for even older pilots with reduced flexibility. The bottom edge of the door is intentionally designed to be located below the seat level making entry easy for even shorter pilots and lots of head room means that your headsets will never touch the roof. You only need to pull the handle and the cabin door will open automatically.

Taxiing
Thanks to the nosewheel design, the aircraft behaves perfectly on the ground offering easy and docile handling. The pedels are fitted with very effective hydraulic brakes and the great view from the cabin makes taxiing easy.

A typical analog instrument panel in the StingSport or Sting S3Takeoff and Climb
Setting the electric flaps to takeoff position, 8.5º, and introducing throttle will immediately move the Sirius down the runway and after a very short takeoff roll the aircraft becomes airborne with the controls being effective even at very slow speeds. The climb rate will exceed most pilots’ expectations and visibility from the aircraft is great during climb out.

Flight Characteristics
The Sirius is a very stable but easily maneuverable aircraft throughout the whole speed range. From just above the stall through to fast cruise the performance will surprise you.

The engineers have paid great attention to the design and aerodynamics of the aircraft which will allow it to perform perfectly at low speed thanks to the large wing area and electric flaps and at high speed the aerodynamc cleanness of the aircraft offers great performance with low fuel consumption.

The aircraft has no tendency to behave badly or spin at low speeds.

The aircraft can be equipped with a wide range of avionics to suit every owners requirements making their flight enjoyable and comfortable. The Sirius offers a great view out of its cabin and if aerial photography interests you, the door can be opend in flight or easily removed on the ground.

Landing
Landing the Sirius could not be easier. At slow speeds the controls are very efficient and controllable even with strong crosswind landings. With maximum flaps set to 40º and the strong hydraulic brakes which are very effective on the ground, the stopping distance is surprisingly short.

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A 3D drawing of the StingSportBrief Specifications

Dimensions, Weights & Capacities

Cockpit width: 46"
Wingspan: 30.8 ft
Length: 23 ft
Height: 6.6 ft
Wheel base: 7.12 ft
Wing Area: 121.1 sf
Max takeoff weight: 1,320 lbs*
Basic empty weight: 760 lbs (varies)
Max useful load: 560 lbs (varies)
Max. crew: 500 lbs
Cargo volume: 14.66 cubic ft
Cargo max weight: 75 lbs
Fuel, standard tank: 34.0 gallons
Design load factor limits: +4 g / -2 g

Speeds & Distances

Never exceed (Vne): 138 knots
Max. deploy rescue system: 138 knots
Max, continuous power (Vh): 118 knots
Cruise, 75% power (Vc): 105 knots
Max structural cruise (Vno): 108 knots
Design manuever speed (Va): 86 knots
Max speed, 1st set flaps: 75 knots
Max speed, 2nd set flaps: 65 knots
Max speed, full flaps: 55 knots
Design climb speed: 75 knots
Climb ( Vy): 65 knots
Climb (Vx): 55 knots
Approach (Vref): 65 knots
Rotation (Vr): 35 knots
Takeoff (Vlof): 42 knots
Stall, no flaps (Vs): 43 knots
Stall, full flaps (Vso): 34 knots
Rate of climb: 1,100 fpm

*The Sirius may be fitted to receive floats and therefore may be rated as LSA seaplane with a MTOW of 1,430 lbs.

 

 



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