Aeropro EuroFOX

The VSKYLABS Aeropro EuroFOX

The VSKYLABS Aeropro EuroFOX project for X-Plane flight simulator


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The VSKYLABS Aeropro EuroFOX Project

The development of the VSKYLABS Aeropro EuroFOX Project for X-Plane 11 was approved by Aeropro. Although acknowledged by Aeropro, it is an independent VSKYLABS project which is not affiliated with and/or endorsed by Aeropro.
Project Introduction:
The VSKYLABS Aeropro EuroFOX aircraft add-on for X-Plane 11 is a project that is designed with the focus on simplicity and effectiveness. The flight model is tuned to meet with the relevant EuroFOX flight handling characteristics and operation techniques.

The project consists Three versions of the EuroFOX; The Tricycle (Aerotrek 240), the standard Tail wheel version (Aerotrek 220), and the Tundra tires Tail wheel version. All of them with a 100 hp engine. The package contains a zip file with two separate folders within, each folder for each version of X-Plane (X-Plane 11).

The VSKYLABS Aeropro EuroFOX project is under constant development. Package updates are to be expected. Update/upgrade plan is including (among other things): 3D modeling, 3D cockpit and aircraft performance refinements. The free updates are being pushed out automatically to all buyers. 

Project's Update Log could be found here:

Project support:
You are invited to use the EuroFOX topic in the VSKYLABS Support Forums for feedback, questions, comment, bug reports etc.



'Mudspike' website recently posted an independent review of the VSKYLABS EuroFOX, which covers several aspects of the package. Click the picture below to get directed to the review at Mudspike:

Version v5.3

Version v5.1b1

Version v5.0b1

Version 003.1a till 00.3.5:

Version 002:

Version 001:

 EuroFOX background and history

The  Aeropro company was formed in 1990, in Slovakia. Since 1999, two versions have been produced; Tricycle and Tail-dragger configurations. Both versions features an enclosed cabin with two-side-by-side seats and folding wings. In Europe, the EuroFOX is sold in both kit form and factory complete form. In the USA, it is only available as a factory built aircraft.

In the USA and Canada, the EuroFOX is marketed by Aerotrek, and it's two versions (Tricycle, Tail-dragger) are named A240 (Tricycle) and A220 (Tail-dragger). Both versions are offered with the 80 hp Rotax 912UL and the 100 hp Rotax 912ULS engines.

Aircraft variants:
  • EuroFOX-3K: Tri gear version. Sold in North America as the Aerotrek A240.
  • EuroFOX-2K: Tailwheel version. Sold in North America as the Aerotrek A220.
  • Note: The VSKYLABS Aeropro Eurofox package is including both the A240 and A220 versions, and a third, modified A220 version for STOL operations, which is equipped also with Tundra tires. 

Useful External links and Documents:

Please refer the following documents (Pilot Operating Handbook and Flight Training Supplement) of the real EuroFOX aircraft as the operation manual of the VSKYLABS Aeropro EuroFOX for use in X-Plane flight simulator, as well as a supplement for flying the aircraft in X-Plane, in terms of flying characteristics, handling, techniques etc...

Operations supplement for X-Plane

Recommended Settings:

The VSKYLABS Aeropro EuroFOX add-on is currently being tested and operated on a machine with these specifications:
  • CPU: Intel® Core™ i7-6700 CPU @ 3.40GHz × 8
  • Memory: 32 GB Memory
  • GPU: GeForce GTX 1070/PCIe/SSE2
  • X-Plane 11 (current version).
For balanced field of view, It is recommended to set the 'Lateral Field-of-View' to 85+ Degrees. This is done from X-Plane's rendering options windows in X-Plane.

Reference Screenshots:

Please use the following screenshots as a reference to the information that is described down this page. Please note that the model is constantly being updated and improved, so screenshot's details may vary a it can only get better than what you see ;)

Cabin overview:

Cockpit Panel - Various Switches and Handles:


Cockpit Panel - Flaps, Trim handles + Master fuel shut-off valve:


 Fuel Level Meters, Wing Tank Fuel Valves:

 External Lights - Landing / Taxi Lights:

 External Lights - Position / Strobe Lights:

 External Lights - Position / Strobe Lights:

 Experimental / LSA Autopilot system (click to enlarge):

Aircraft Main Systems

Electrical System:
Electric system is formed single-wire system of cabling with ground connection negative pole. Network supplies alternator with rectifier with 250W power and accumulator 12V / 16Ah. Board network is switched by a switch key of switch box. Individual circuits of appliances are switched by separate switches and protected by a safety limit switch.
  • Note for X-Plane:
    • The Master-On power switch is located on the right side of the cockpit panel. Use this switch as a master-on power switch.

Engine and Propeller:
The EuroFOX (A240) is powered by the Rotax 912ULS 100-hp engine. It is a four-cylinder, four-stroke, horizontally opposed, center-camshaft engine with overhead valves. Engine cooling is of a combined type; cylinder heads are water-cooled while cylinders are air-cooled. The engine has dry-sump lubrication. The ignition system is a dual, electronic and capacitor flywheel magneto type. The engine is equipped with an electric starter, AC generator and a mechanical fuel delivery pump. The propeller is driven by an integrated reduction gearbox with mechanical damping.

Engine specs:
  • Engine manufacturer: Rotax GmbH., Austria
  • Engine model: Rotax 912ULS
  • Max. power - take-off: 100 hp
  • Max. engine speed (MSL) - take-off: 5800 RPM (max. 5 min)
  • Max. engine speed (MSL) - continuous: 5500 RPM
  • Max. cylinder head temperature: 280 F
  • Min. oil temperature: 122 F for full-throttle operation
  • Normal operating temperature: 190 – 230 F
  • Max. oil temperature: 300 F
  • Minimum oil pressure: 12 psi min oil pressure below 3,500 rpm
  • Maximum oil pressure (cold start only): 103 psi
  • Normal oil pressure range: 29 – 73 psi
  • Oil consumption: max 0.06 quarts/hour
  • Fuel pressure - minimum: 18 bar (2.2 psi)
  • Fuel pressure - maximum: 4 bar (5.8 psi)
  • Propeller gearbox reduction ratio: 2.43 : 1
The standard propeller is manufactured by Woodcomp in the Czech Republic. The propeller is a 3-blade, ground-adjustable prop. Propeller is 68" diameter.
  • Notes for X-Plane (engine and propeller):
    • The VSKYLABS Aeropro EuroFOX aircraft is fitted with the 100 hp Rotax 912ULS engine.
    • The dual-ignition switches are located in the left side of the instruments panel, above the Master Switch. The switches are activating both Magnetos.
    • The Carburetor heating handle is located near the Throttle lever. 
    • Originally, the throttle lever is a Rotatable lever/knob; rotate for fine power settings (clockwise to increase power, counterclockwise to reduce power), and for larger changes just push/pull the throttle when the frontal button is pressed and held. The VSKYLABS Aeropro EuroFOX initial version does not features the rotate feature, but it will be implemented in future updates.

Fuel Tanks System:
Fuel system has a total usable capacity of 22 US Gallons. It consists of two wing tanks (10.6 Gallons each) and of an 1.1 Gallons equalizing tank in the fuselage, connected through the pipes with the fuel cock and filter. Fuel level indicators are part of each tank, the minimum fuel warning light is mounted as a standard.
  • Notes for X-Plane:
    • Wing tanks fuel valves:
      • Above/behind each pilot seat, there is a fuel valve that controls the fuel flow from each wing. These valves are operational (through a mouse click), and you can switch between feeding from the left wing tank or the right wing tank.
      • For simplicity, these valves are programmed to toggle (between each other) so when you set up a certain valve to 'ON', the other valve is automatically set to 'OFF'.
      • At the moment, the aircraft is set automatically (when loaded, either 'cold-start' or 'with engine-running'), in a "ALL" state, in which both valves are opened and fuel is drawn from both tanks to the equalizing tank.
    • Master shut-off valve: is located in the left side below the cockpit panel.
    • Fuel level meters: Positioned in each wing-root, above the pilots heads. Note that these fuel level meters are acting as spirit levels (connected vessels principle in each wing tank), and they will show the correct amount of remaining fuel only when the wings are level.  
    • Minimum fuel indicator bulb (1.1 US gallons): is located in the from instrument panel, upper left side. Push the control button to check the system.
    • X-Plane known issues: When starting (any) aircraft with Engines Running, the fuel system is automatically set to draw fuel from 'ALL' fuel tanks. will see both of the wing-tanks-fuel-valves set to "open". If you do nothing, the fuel will be drawn from both tanks (not at a time but in every few seconds it will draw fuel from the other tank, keeping it equal). If you want to operate the fuel system so it draws fuel only from one tank (forcing you to change the valves every once in a while during the flight to keep it equal), just click once on of the wing-tanks-fuel-valves and it will set it up so you will be responsible to manage fuel quantities by switching these valves every once in a while. Be aware that in the current version of the aircraft, once you have decided to manage the wing tanks separately by closing one of them, you will be switching the system to a mode of operation of either using the left or the right tank, until a new flight is selected (load a new aircraft etc...).

Electric Fuel Pump:
The EuroFOX is equipped with an electric fuel pump (Boost Pump) with an on/off switch and "on" indicator light on the instrument panel. The electric fuel pump serves as a booster or backup to the engine-driven mechanical fuel pump. The electric fuel pump should be used at any time when the sudden failure of the engine-driven mechanical fuel pump and a loss of fuel pressure could cause a loss of engine power and compromise safety. Normally this will mean utilizing the electric fuel pump during takeoff, during climb-out to a safe minimum altitude, during any low-altitude operations, and during landing.
  • Notes for X-Plane:
    • The Electric Fuel Pump switch and its indicator light are located in the left side of the instruments panel.

Controls Systems:
The EuroFOX is equipped by dual stick control. Elevator and ailerons are controlled by a system of rods whereas the rudder is cable controlled. The wing flaps are controlled by the lever and rod and through the counter-shaft is threaded into aileron-flapperon circuit.

Trim control is mounted as a standard. All engine controls are placed on the instrument board.

Rudder control – pedals of foot control are situated on the floor in front part of cockpit . Moving of pedals is transmitted on the rudder through steel cable. Wing flaps – handle of wing flaps is situated in middle part of cockpit.
  • Notes for X-Plane:
    • The Flaps and the Trim handles are positioned down between the two pilots seats.
    • When loading the aircraft, the aircraft trim is set-up for takeoff ("neutral").
    • Throttle operation: The throttle can be operated with the mouse; press and hold the mouse button while on the throttle lever and set the mouse forward and backwards to adjust power.
    • Flaps operation: The Flaps can be operated with the mouse; press and hold the mouse button while on the Flaps lever. If you "throw it" up or down, the flaps will go all the way to it's limits (up/maximum down). You don't have to wait, just "throw" it up/down). For fine and gradual operation of the flaps, press and hold the mouse button, and slowly move it up or down, to set it in a desired position.
    • Airspeed Indicator display units: To toggle between mph to kph, just click on the Air Speed Indicator edges.

Aircraft Lighting Equipment:
The A220 features the Whelen LED wingtip lights. This system consists of a white rearward-facing LED lights and a flashing LED strobe light on the side of both wingtips, a green forward-facing LED light on the right wingtip and a red forward-facing light on the left wingtip.

There is also a landing light (two lights) fitted to the lower nose cowling which also acts as a taxi light. Power for the light system is taken from the aircraft's main power supply.

Note: The EuroFOX is NOT approved for night flight, and the exterior aircraft lighting does not comply with all the FAR requirements for night flight.
  • Notes for X-Plane:
    • Lighting switches are located in the right side of the front cockpit panel.
    • The instrument panel features a non-adjustable, low consumption flood light, which may be useful when flying in dawn or dusk.

Flying the VSKYLABS Aeropro EuroFOX
in X-Plane flight simulator:

The VSKYLABS Aeropro EuroFOX was designed to perform as close as possible to the described information and to handle realistically within the real aircraft's limitations.

As written above, please refer the linked documents up this page (Pilot Operating Handbook and Flight Training Supplement) of the real EuroFOX aircraft as the operation manual of the VSKYLABS Aeropro EuroFOX for use in X-Plane flight simulator, as well as a supplement for flying the aircraft in X-Plane, in terms of flying characteristics, handling, techniques etc...

For your convenience, I've pasted down here some of the information that is available is the official EuroFOX aircraft manual. Scroll down and get familiar with the aircraft's limitations, performance and flying procedures. 

The information and checklists below are only to use with flight simulation software. It is not a replacement to any real aircraft checklists and documentations.

Aircraft Specifications
  • Wingspan: 29'11.3", wing area 122.53 sq ft 
  • Aircraft length: 18'6.5"
  • Aircraft height: 7'4.5" 
  • Cockpit width: 44.1" (4.6" wider than Cessna 172) 
  • Dimensions with wings folded:
    • 7'10" max width
    • 21'6" length
    • 7'6.5" main gear width 
  • Max height with wings folded:
    • A220 = 72.5"
    • A240 = 74" (at prop tips, with standard tires) 
  • Empty weight: 655 lbs. (with typical options installed) 
  • Maximum gross weight: 1235 lbs. 
  • Useful load: 580 lbs. 
  • Fuel capacity: 22.5 gallons

Aircraft Limitations
(All air speed values in this chapter are presented in MPH Indicated Airspeed)
  • Stall speed (IAS) at maximum take-off weight with wings level: 
    • Flaps down: 43 mph. 
    • Flaps up: 49 mph. 
  • Flaps extended speed range (IAS): 
    • Lower limit: 41 mph. 
    • Upper limit: 93 mph. 
  • Maximum maneuvering speed (IAS): 
    • Max. maneuvering speed: 109 mph. 
    • Never exceed speed: 143 mph.
  • Crosswind and wind limitations for takeoff and landing: 
    • Max headwind: 28 mph (25 knots). 
    • Crosswind: 17 mph (15 knots). 
    • Tail wind: 7 mph (6 knots). 
    • Crosswind take-offs and landings require training and experience, the higher crosswind component, the better your skill must be. Do not fly without proper experience when the wind speed is approaching the limit. Avoid take-offs with a tail wind when possible – the total take-off distance is significantly longer and longer ground distance is required to gain altitude. When landing with a tail wind the aircraft ground speed is higher resulting in longer landing distance.
  • Service ceiling:
    • 14,760 ft (standard atmosphere).
  • Load factors: 
    • Max positive FLAPS UP: +4Gs / FLAPS DOWN +2 Gs 
    • Max negative FLAPS UP: -2Gs / FLAPS DOWN 0 Gs
  • Prohibited maneuvers:
    • Aerobatics and intentional spins are prohibited. 
    • Maximum angle of bank: 60° 
  • Other limitations:
    • IFR flights and flying in clouds is prohibited.
    • Night Flights are prohibited.
    • Flight into know icing conditions is prohibited.
    • Flights at ambient temperature between 14 F and 32 F are permitted only under no icing conditions and when the carburetor heating is activated. 

Aircraft Performance:
  • Rate of climb (MTOW 1235 lb)1000 fpm.
  • Cruise speeds4800 rpm 90 mph indicated.
  • Max. cruise speed132 mph.
  • Max takeoff power5800 rpm. Note that static rpm will be lower. 
  • Max continuous power5500 rpm. 
  • Cruise flight4200 - 5200 rpm.
  • Idle speed1450-1800 rpm. Note that during flight these values may get higher.
  • Fuel Consumption:
    • Takeoff power performance: 7.1 US gallons per hour. 
    • Max continuous performance: 6.6 US gallons per hour. 
    • Cruise performance: 3.2 - 5.0 US gallons per hour.
  • Range600+ miles
  • Endurance: 5.7+ hours endurance at good cruise speed.
  • Glide ratio: 10:1 at 70 mph.

Normal Procedures
(All air speed values in this chapter are presented in MPH Indicated Airspeed)
  • Engine starting:
    • preflight inspection COMPLETED
    • safety belts ADJUST AND SECURE
    • brakes CHECK FUNCTION
    • control stick FREEDOM OF MOVEMENT
    • engine controls FREEDOM OF MOVEMENT
    • doors CLOSED, LOCKED
    • master switch SWITCH ON
    • main fuel valve OPEN
    • wing tank fuel values BOTH OPEN
    • throttle HALF A TURN OPEN (idle when choke is used)
    • control stick PULLED (clamped between legs)
    • brakes ON
    • propeller area “CLEAR”
    • ignition (mag) switches BOTH ON
    • master switch STARTER
    • after starting the engine avoid exceeding 3000 RPM until 90 F oil temp achieved.
    • instruments CHECK READINGS
    • choke OFF
    • avionics and other switches SWITCH ON (GPS,radios...)

  • Taxiing:
    • taxiing speed is 9 mph maximum. Steering is performed by the rudder pedals controlling the nose wheel. Avoid excessive speed and use proper braking techniques to avoid brake overheating. In crosswind hold ailerons ‘upwind’, using the control stick. In strong crosswind perform the taxiing with an assisting person holding the wing by its windward side. When taxing on gravel surfaces use as low engine power as possible to help prevent damage to the propeller leading edges. When taxing on paved surfaces, avoid power settings that would result in prolonged braking. When taxing downhill, or with a tail wind, use periodic braking bringing the aircraft to a complete stop before beginning to taxi again. Short harder braking is preferable to long, weaker braking, as the brake system will heat up during prolonged use and can cause brake fade and even unexpected failure.

  • Engine warm-up, power check:
    • brakes on. 
    • start the engine (see 'Engine starting' procedure above). 
    • warming-up: first at 2500 RPM for 2 minutes, then at 3000 RPM to reach oil temperature of 122 degrees F. 
    • ensure temperature and pressure values - within operating limits.
    • ignition check (magnetos) – set 4000 RPM, RPM drop should not exceed 300 RPM on either magneto nor 115 RPM differential between magnetos. 
    • idle speed – 1450-1800 RPM. 
    • all engine instrument readings must not exceed operating limits under any power setting.

  • Normal take-off - Prior to take-off:
    • brakes BRAKES ON
    • speed 4000 RPM
    • magnetos CHECK (R, BOTH, L, BOTH)
    • carburetor heating ACTIVATE WHEN NECESSARY
    • trim NEUTRAL
    • flaperons TAKE-OFF POSITION (typically half flap)
    • master switch ON
    • ignitions BOTH ON
    • main fuel valve OPEN
    • instruments CHECK (and strobes on if desired)
    • door CLOSED, LOCKED
    • safety belts FASTENED, TIGHTENED
    • controls FREEDOM OF MOVEMENT
    • electric fuel pump ON
    • runway not occupied by another aircraft or by an aircraft on short final

  • Take-off:
    • throttle full
    • engine instruments CHECK
    • elevator control ROTATE at 46 MPH
    • initial climb speed 70 MPH
    • engine instruments CHECK
    • wing flaps slowly FLAPS UP ABOVE 150 FT (min)
    • trimming TRIM
  • Notes:
    • Continuously increasing engine power to maximum, bring the aircraft into motion. Slightly pulling the control stick rearward, raise the nosewheel off the runway. At a speed of approximately 43 mph, slightly pull the control stick back, bringing the main landing gear off the runway. Continue acceleration after liftoff until airspeed increases to 56-62 mph and then slowly pull the control stick back to get the aircraft climbing at a speed of 62 - 73 mph.

  • Climbing:
    • Best angle of climb speed (Vx):
      • throttle MAX RPM
      • airspeed 69 mph
      • engine instruments CHECK
    • Best rate of climb speed (Vy):
      • throttle MAX RPM
      • airspeed 75 mph
      • engine instruments CHECK

  • Cruise flight:
    • put the aircraft into level flight
    • engine speed 4000 - 5500 RPM Optimal 4500
    • airspeed 69 - 120 MPH as required
    • engine instruments CHECK 
    • fuel tank levels CHECK
    • Test min fuel light
    • Electric fuel pump off
    • carburetor heat on if required
  • Notes:
    • During cruise flight an RPM up to 5500 can be used. Always monitor all engine parameters during cruise flight, especially when high engine power settings are used. Higher RPM means higher speed, but fuel consumption is increased at the same time. An RPM setting around 4500 is usually the best compromise between speed and fuel consumption. Check the operation of the minimum fuel indicator bulb by pushing the control button when the fuel level is approaching the minimum fuel quantity (1.1 U.S. gallons).
    • When carburetor icing is possible, activate carburetor heating. The fuel consumption and remaining fuel on board should be monitored. Always make a comparison between estimated and actual time above any waypoint.
    • Take care when selecting the flight path – avoid flying over large urban areas, large forests or large water areas as well as over mountains. Landing possibilities are very limited in case of engine failure or other emergency over those areas. Always have some suitable landing area within a gliding range. When it is necessary to cross a large area not suitable for emergency landing, always climb to an appropriate altitude to reach a suitable landing site should an emergency occur.

  • Descent:
    • throttle JUST ABOVE IDLE
    • engine instruments CHECK
    • carburetor heating ACTIVATE WHEN NECESSARY
  • Notes:
    • During long approaches and when descending from a considerable height, it is not advisable to reduce the engine throttle control to idle. In such cases the engine becomes over-cooled and a loss of power might occur. When descending, set the power to just above the idle so that engine instrument readings range within the limits for normal use.

  • Downwind:
    • Enter at pattern altitude 45 degrees mid field
    • Radio call
    • power 4000 - 5000 RPM
    • airspeed 75 - 90 MPH
    • engine instruments CHECK
    • safety belts TIGHTEN
    • base leg and final leg airspace CHECK FOR OTHER TRAFFIC
    • landing site SITUATION

  • Base Leg:
    • Radio call
    • power 3000 RPM
    • airspeed 65-70 MPH
    • engine instruments CHECK
    • wing flaps TAKE-OFF (HALF)
    • trimming TRIM

  • Final and landing:
    • Radio call
    • sideslip limits 60 - 110 mph max 65 mph w/ full flaps
    • airspeed 65-70 MPH
    • power ADJUST AS NEEDED
    • carburetor heating ACTIVATE WHEN NECESSARY
    • electric fuel pump ON
    • engine instruments CHECK
    • wing flaps LANDING (FULL) strong crosswind 1/2 flaps
    • trimming TRIM
    • engine instruments WITHIN LIMITS
    • check for clear landing site (people, obstacles)
    • 50 feet, reduce the engine speed to idle
    • Maintain speed of 65-70 MPH until the flare
    • 1.5 to 3 feet above the runway, pull the control stick rearward.
    • Touchdown ~45 MPH.
    • sideslip limit with flaps: 65 mph - 110 mph
    • sideslip speed range: 60 - 110 mph
  • Notes:
    • Always judge, based on your experience, whether the available runway is of sufficient length for a normal landing. Always make a realistic estimation and be ready to abort any landing.
    • At a height of about 50 feet, reduce the engine speed to idle. Maintain speed of 65-70 MPH until the flare. When flaring at a height of 1.5 to 3 feet above the runway, allow the airspeed to decrease by gradually pulling the control stick rearward. Ideally, the aircraft should touch down at a speed of about 40 – 45 MPH.
    • When landing with a significant crosswind component, do not set the flap to the landing position (FULL) – instead, use take-off setting to touch down at higher speed to ensure proper control over the aircraft during the latter stages of the landing

  • After landing:
    • Clear runway
    • wing flaps RETRACT
    • electric fuel pump OFF
    • Carb heat off

  • Engine shut-down:
    • power cool down the engine at 2000 RPM
    • engine instruments CHECK
    • avionics and other switches OFF
    • ignition (mag) switches OFF
    • master switch OFF
    • main fuel valve CLOSED
  • Notes:
    • Secure the aircraft chocks and tie-down ropes or other ways to prevent the aircraft from unintended movement, lock the controls (using seat belts).
    • During normal operation, the engine is usually sufficiently cooled during the approach and landing. Make sure that all avionics and other instruments are switched off before the engine is shut down. Do not rely on only parking brake to hold unattended aircraft.

Stay tuned for more development updates