TST-10MB Atlas


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In year 2007 a development of TST 10 MB has started.

The first prototype of this modified version was finished in the spring of 2008 and after series of functionality tests a regular production has begin. Till now five of these motorized gliders are flying in the Czech Republic and France.

TST-10MB was developed from its predecessor, the successful version TST-10M, which brings joy of flying to our costumers almost on all continents.

Main differences of TST 10 MB from its predecessor:

retractable main undercarriage

As a standard the MB version is equipped with electronic servo motor, which is operated by two ways switch for retracting and extracting. This switch is equipped with safety lock for protection against accidental activation. The extracted position of undercarriage is signalized by green light and retracted position is signalized by red light on instrument panel.
For higher level of safety, the unit is equipped with acoustic signal, which informs pilot about retracted undercarriage if air brakes are operated.
In case of electricity problems or empty battery, the pilot has also the possibility to extract the undercarriage by hand operated lever for safe landing.
Thanks to retractable undercarriage the glide ratio was increased by one point.

automatic connection of controls for wing to fuselage assembly:

This system simplifies the assembling of aircraft, abbreviates time of preparing before fly and it is contributing to the comfort of operation. Wings are simply joined with fuselage through root pins and controls of air brakes and ailerons are connected simultaneously and automatically, without any further adjustment. Assembling person has to install and secure only two main pins of wings.

new seat base shape

We have achieved larger space above a pilot´s head, more comfortable sitting in cockpit and usability for taller people thanks to lowering a seat base.

larger fuel tank

New design of controls paths enables an increasing of fuel tank capacity up to 20 liters / usable amount /.

optimized winglets, zig-zag tape and eddy generators

New reshaping of winglets, an experimentally verified position of zig-zag tapes and eddy generators have contributed to the increasing of glide ratio by one point.



Brief Glider Characteristics:
  • 15 meter wing span
  • Glide ratio 42
  • Long-life all-composite structure
  • Retractable Rotax 447 power unit
  • Independent taciing and take-off; no off-airport landings and return transports
  • Ability to extract and retract the engine anytime during the flight
  • Up to 250 km range with the engine engaged
  • Aerotow capable
  • Club class conformance
  • Easy assembly, disassembly and transport
  • Easy maintenance

TST-10MB - Technical Description

Airframe
CHARACTERISTICS
The TST-10M is a single-seat, mid-winged monoplane with a cantilever wing, T-shaped tail and a classical one-wheel undercarriage. Its composite structure is made in negative molds.
WING
The wings with sandwich structure are equipped with ailerons and air brakes on the upper surface. There are no ribs in the wing. The strength system of the wing is formed by the main spar, by the aileron spar and by the root rib. All the wing profile of the sandwich structure forms the torsion box.
The wings are interconnected by fittings and two horizontal pins. The connection wing-fuselage is made by means of pins and fittings placed in the fuselage and the wing root rib. The composite ailerons are hung by four hinges with the turning axis on the upper side. Air brakes on the upper side of the wing are made of aluminium and are retracted into pits.
FUSELAGE The fuselage with a shell structure is made in the negative mould together with the fin.
TAIL
The tail is a T-shaped sandwich structure.
CONTROLS The controls, enabling pitch, roll, air brake and trim controlling, are of the lever design with a push-pull rods system. The relevant backstops are placed on the stick. Yaw control is transmitted via cables and includes adjustable foot pedals. The airplane can be trimmed by a torsional member in the elevator drive that is controlled by a lever in the left of the cockpit.
RETRACTABLE UNDERCARRIAGE
The undercarriage consists of one unsprung wheel 300x100 mm, which is fully automatically retracted with the use of electric motor. The brake handle is on the control stick. The wingtip wheels serve for independent taxiing and take-off. The turnable tail wheel 80x30 mm enables easy manipulation on ground.
Power Plant
ENGINE Rotax 447 with two separate membrane carburetors and belt reducer, ratio 1:2. Electric starter.
PROPELLER The propeller is wooden, two-bladed with fixed adjustment; diameter 1200 mm.
EXTRACTION The power plant is extracted by a 12V DC servo motor. The servo motor also ensures automatic opening and closing of the engine door in the aircraft fuselage and controls the locking pin, which balances the propeller into a horizontal position prior to engine retraction.
CONTROLS
The retractable mechanism is handled inside the cockpit through the instrument panel. The pilot controls the extracting and retracting of the power unit with two push buttons on the instrument panel. The very movement is ensured by an electronic unit controlled by a microprocessor, which takes care of the automatic opening of the engine door, monitors the limit position of the power unit, signals the pilot about the exact situation and activity and connects the starter only in the fully extracted position. This electronic system also prevents any retraction of a running engine. Entire engine extraction/retraction lasts approximately 20 seconds. The retractable mechanism of the power unit enables self-launching and restart during flight.


TST-10MB Atlas - Technical Parameters

Technical Data
Wing span 15 m
Wing area
9.85 m2
Aspect ratio
22.8
Length
6.87 m
Number of seats
1
MTOW without BRS
300 kg
MTOW with BRS
322.5 kg 
Weight of the pilot and fuel 65 - 115.5 kg
Vne 180 km/h
Max. maneuvering speed 140 km/h
Max. speed with extended air brakes      
140 km/h
Max. speed in aerotow 140 km/h
Stall speed
60 km/h
Max. theor. glide ratio without winglets  
38 at 88 km/h
Max. glide ratio with winglets  42 at 88 km/h 
Min sink rate
0,62 m/s at 72 km/h
Max permitted load factor
+4 / -2 
Max calculated load factor
+5.26 / -3.26
   
Power unit
Engine
Rotax 447
Power
29.5 kW (40 HP)
Carburetor
2x membrane
Reducer
Belt 1:2
Propeller
Wooden, 1200mm
Fuel tank capacity
20 liters
Fuel consumption when climbing
11 liters / h
Fuel consumption at cruise speed
9 liters / h
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