Below is all the information pertaining to the Sling 4 aircraft. To reveal the content click on each title bar.

The Sling 4 concept emerged from the performance of the standard Airplane Factory Sling 2 during Mike and James' 2009 circumnavigation. Conceived as a 600kg MAUW "light sport" aircraft, it was soon clear that, even with a normally aspirated 100hp motor, the standard Sling was able to climb and perform well right up to 970kg. The first consequence is that The Airplane Factory Team performed all the required tests and approved the standard aircraft at 700kg MAUW. We also simultaneously commenced work on development of a light 4 seater version of the same aircraft.

The chief differences between the Sling 2 and the Sling 4 are the wing size, the engine and the centre fuselage arrangements. Where the standard Sling customarily uses a 100hp Rotax 912 ULS or iS engine, the Sling 4 will be fitted with the 115hp turbocharged Rotax 914 UL engine. Although a 15hp difference doesn't sound like the world, the turbocharged engine gives full power at up to 15 000 feet, at which altitude the 100hp would only be delivering approximately 55hp. So on a hot day the swing in power between the 912 ULS and 914 UL engine is in the vicinity of 36%, not just 15%.

Some of the features which make the Sling such a fine aircraft include:

• Her flying characteristics - perfectly coordinated, highly responsive controls (she feels like a fighter jet without being over-sensitive);
• Her performance - close to the best across the full range of qualities;
• Her aluminum construction - for ease and consistency of construction and proven strength and lifespan;
• Her airframe strength and durability – she won’t break easily and if you treat her right, she’ll last you for the rest of your life;
• Her excellent instrumentation options;
• Her wide cockpit, excellent all around view and substantial luggage capacity;
• The incorporation, by design, of a ballistic parachute for safety;
• The use of high quality components throughout


The Sling is flown subject to a MAUW restriction of 600kg. In this configuration the Sling complies with all the requirements of ASTM F2245 – "Standard Specification for the Design and Performance of a Light Sport Aircraft".


The Sling is flown subject to a MAUW restriction of 700kg. In this configuration the Sling complies with all the requirements of the "Certification Specifications for Very Light Aeroplanes, CS-VLA".

The aircraft specifications, save for fuel capacity and weights, however, are the same in each category.
The performances are different and are provided for both of the categories.

Seats 4
Engine Rotax 914 UL
Horsepower 115 hp / 86 kw (turbo)
Propellor make/operation Airmaster / Constant speed
Propellor blades/diameter 3 / 72”
Main Avionics MGL Odyssey EFIS
Secondary Avionics Analogue backup instruments
Overall Length 23ft 5in  /  7.1m
Height 8ft / 2.45m
Wingspan 32ft 8in  / 9.965m
Wing Area 134 sq ft  / 12.4 sq m
Cabin Width 43.8in / 1.11m
Max take off weight 2 028 lbs   (920 kg)
Standard equipped empty weight 1 036 lbs    (470 kg)
Useful load 992 lbs      (450 kg)
Full fuel payload 703 lbs      (319 kg)
Luggage capacity 88 lbs (40 kg)
Capacity 48.1 US gal  / 182 litre
Consumption at cruise 5.8 gal per hr   (22 lt per hr)
Max Speed (VNE) 140 kias  /  161 mph
Cruise Speed 75% power (6 000 ft above sea level) 120 ktas  /  138 mph
Stall Speed – clean 47 kcas  /     54 mph
Stall Speed – full flaps 42 kcas  /     48 mph
Max Demonstrated Crosswind 15 kcas  /     17 mph
Take off ground roll – concrete 700 ft / 213 m
Landing distance – braked 500 ft 152 m
Rate of climb – sea level 750 fpm
Max operating altitude 15 000 ft
Range at 75%, 45 min reserve 780 nm  / 1,450 km
Limit loads +4-2
Wing loading 15.1 lb sq ft  / 74.2 kg sq m
Power loading 17.6 lb per hp / 8.0 kg per hp
Cost per nautical mile $0.48
Cost per hour $57.50


Below are the various kits available for the Sling 4, as well as any optional extras available.

Kit builders do not only receive support from the friendly staff at The Airplane Factory, but you also have support through the extensive kit building manual supplied with your kit and our Kit Build Channel on YouTube, supplying you with informative videos which assist in building your Sling kit.

Kits Available

Empennage Kit:
Kit for construction of complete horizontal and vertical stabilisers, rudder and elevators, hinges, control connectors, trim tab, composite tips.
Wing Kit:
Kit for construction of complete set of wings, including already assembled main spars, flaps, ailerons, hinges, bellcranks, fuel tanks, pitot mount brackets, composite wing tips.
Fuselage Kit:
Kit for construction of complete forward, mid and rear fuselage, including fully assembled centre spar, rear spar, seats, all control mechanisms (throttle, brake, stick, pedals etc), firewall, engine mount attached to firewall.
Undercarriage Kit:
Complete undercarriage kit including main and front gear, main gear mount bolts, front spring & related parts, wheels, tyres, tubes, axles, bearings, hydraulic brake system.
Canopy and Instrument Panel Kit:
Complete canopy kit including slider, front and main canopy frames, front windscreen, main canopy, closing panels
Final assembly and finishing Kit:
Kit includes everything required to effect final assembly of aircraft, including nose cowling, all composite closing fairings, pushrod assemblies, related rivets and hardware.


• Kit packed in separate cardboard & plywood boxes - required for freighting
• Fuel system including aux fuel pump, selector valve etc.
• Warp Drive propellor, prop extension, spinner
• MGL EFIS system complete plus backup analogue flight instruments
• MGL V6 Radio, VHF antenna (includes internal intercom)
• Electrics, switches, circuit breakers, batteries, wires, actuators etc.
• Landing lights
• Airframe components, wheel spats, steps etc.
• Leather upholstery, carpets etc.
• Extras, first aid kit, fire extinguisher, covers etc.
• Documentation, fees & inspections
• Paint (estimate)
• Tools, clecos, pneumatic riveter etc.


• Trig transponder with antenna and harness
• Auto Pilot system
• Aveo triple PowerBurst LED strobe and nav light system with lifetime warranty
• Parachute recovery system with mount and cables

Standard Equipment

•  Sling constructed from CNC punched aircraft grade aluminium
•  Dark grey carpets with sound proofing underneath
•  Anodised main spars and all aluminium parts are Alodined for corrosion protection
•  Centre console with padded armrest and small storage hatch
•  Rotax 914 ULS (115 hp) engine with automatic carb heat system & stainless steel exhaust
•  Cabin heater - both sides
•  3 bladed ground adjustable Warp Drive composite propellor with nickel leading edge & 10" composite spinner
•  Oil cooler and radiator for hot and cold operation with in-line oil thermostat
•  Front gear, engine mount and pedals made from 4130 steel
•  Auxillary electric fuel pump
•  Robust main gear from uni and biax glass fibre & aircraft grade epoxy
•  Robust coil spring with needle roller bearings on front gear
•  MGL Explorer iEFIS multifunction touch screen primary instrument which also displays: EGT, CHT, oil temp, oil press, rpm, fuel level, fuel press, fuel flow, manifold press
•  3 1/8" backup instruments - ASI, altimeter, 2 1/4" slip indicator, standard panel mount compass
•  MGL V6 VHF radio / intercom & Rami 10V VHF antenna
•  150 Litre (39 US gal) wet fuel tanks in wings (75 Litre for LSA)
•  Large electrically operated slotted flaps
•  Ailerons and elevator use pushrod controls with bearings & all control surface hinges use ball bearings
•  Cast aluminium unheated pitot tube with angle of attack
•  Inspection hatches at all junctions and inspection points Internal red LED cabin light

•  Full dual controls - sticks, pedals, throttle and brakes
•  Glove / map box in instrument panel
•  Matco axles, wheels and powerful hydraulic disc brakes with park brake - 5" front & 6" main wheels with 4/6 ply aviation tyres Landing / taxi lights (double 55 W) on one wing
•  Composite wheel spats on all 3 wheels
•  Locking fuel caps
•  Andair fuel selector valve (selection - left, right, off)
•  Fixed front windscreen, roll-over protection bar and rear sliding main canopy with lockable canopy lock
•  Painted single colour on the outside and grey interior
•  Electrically operated elevator trim tab
•  Flap controller - 4 position auto switch panel Halon fire extinguisher, first aid kit with emergency signal strips
•  RAC stick grip with PTT, elevator trim and flap buttons on LH seat stick & RAC stick grip with ptt on RH Sling Sunshield, lightweight canopy cover, plugs and covers for intakes and pitot tube
•  Circuit breakers in the instrument panel Fuel tester, engine tool kit
•  Adjustable seats - both base and back, adjustable pedals
•  Side handle for climbing onto the wing
•  Leather upholstery (seats, map pockets and stick boots) and new style leatherette interior side panels with pockets
•  Padded leather dash top with cooling vent for instruments.
•  Log books, pilot operators and maintenance manuals
•  Registered and with flight authorization or with the necessary paperwork for export orders
•  Test flown, trimmed and instruments calibrated

Optional Upgrade Items

•  Aviation start keyed switch - master|left|right|both|start
•  VSI 0 - 2,000 ft/min
•  Aveo triple AveoFlash LED strobe and nav light system with lifetime warrantee
•  Aveo triple PowerBurst LED strobe and nav light system with lifetime warrantee
•  Kuntzleman triple strobe streamline head with nav light system
•  Kuntzleman LED landing light (single) instead of standard Halogen (price for each one)
•  Additional standard landing lights on RH wing
•  Special colour paint scheme per extra colour
•  Carbon fibre look on panel and centre console
•  Golf bag luggage extension
•  Put parachute cables and all mount brackets and skins in readiness for a parachute
•  Magnum 601 ballistic parachute
•  Whirlwind 3 bladed ground adjustable 70" prop
•  Airmaster 3 blade constant speed prop with nickel leading edges and aluminium spinner
•  Trig 21 Mode S transponder
•  Vacuum pump system with gauge and regulator
•  Artificial Horizon gyro vacuum gauge

•  Artificial Horizon gyro electric gauge
•  Special complex stripes on fuselage, wings or spats
•  Direction Indicator gyro gauge
•  Dual toe hydraulic brakes instead of hand operated brake
•  Countersinking of all exterior rivets
•  Xenon landing light (single) instead of standard Halogen (price for each one)
•  Turn Coordinator Indicator electric gauge
•  Garmin SL30 NAV COM with AV 12L antenna (instead of MGL V6)
•  Garmin GTX 327
•  Course Deviation Indicator gauge
•  Garmin SL40 radio and intercom with 10V VHFantenna (instead of MGL V6)
•  Zaon Collision Avoidance PCAS XRX installed
•  PM 1000 II Intercom with VOX and music input
•  Ram mount and charge connection for iPad
•  FT-6- Red Block Fuel Flow Transducer (instead of the standard flow sender)
•  Ameriking ELT (Emergency Locator Transmitter) Night lights on "6 pack" analogue instruments with dimmer
•  A second MGL Explorer iEFIS and backup battery (no analogue gauges)
•  MGL autopilot servos connected to Voyager EFIS (roll & pitch autopilot)
•  A second MGL Explorer iEFIS with backup battery (keeping analogue gauges)
•  Elevator trim on both sticks (full dual operation)
•  Arrange CAA test flights and approvals for flight school training
•  Authority to Fly

GAP - Global Aviation Products

TAF Safety Alert 001 131112 912iS fuel connector
TAF Safety Alert 002 180613 fuel hose
TAF Safety Alert 003 291113 Flap Controller (Kit Built)
TAF Safety Alert 004 130314 Fuel Filter (912iS)
TAF Safety Alert 005 140314 Fuel tank pickup
TAF Service Bulletin 001 080414 Cracks in landing gear
TAF Service Bulletin 0002 140814 Centre to rear fuselage join
Sling LSA Pilot Operating Handbook Ver. 2.3
Sling LSA Maintenance Manual Ver. 2.2
Sling 4 Pilot Operating Handbook Ver. 1.3
Sling 4 Maintenance Manual Ver. 1.2
Sling 4 Specifications & Performance
The app is titled Sling Builder and is listed in the iTunes store for Free at the following link

To make a general enquiry or request a quote please complete the form below. If you require information via e-mail PLEASE ENSURE that you provide your address.
Enquiry: Sling MGL Avionics Airmaster General
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Sling 4 Logo


The Sling 4 can be flown either as a Light Sport Aircraft (LSA) or as a Very Light Aircraft (VLA)