The Challenger II 503 Deluxe Airframe includes all the add-ons, accessories and upgrades to provide maximum performance, utility and comfort in Canada. This package is rated for a gross weight of 960 lbs at +6G / -3G ultimate loads.

The tail, wings and fuselage are pre-built at the factory from 6061-T6 aircraft grade aluminum. All hardware is provided and is AN aircraft quality.

Superflite fabric is provided pre-sewn into socks for the tail, pre-cut into top and bottom sections for the wings, and precut into panels for the fuselage.

Full dual controls - sticks and rudder pedals - are installed at the factory. Throttles are provided for front and rear seats. Cushions and seatbelts with shoulder straps are standard for both seats. In-flight adjustable flaperons and pitch trim are standard with this package.

The cabin is fully enclosed with a Lexan wraparound windscreen plus doors on both sides. Very few ultralights have doors on both sides which is significant on floats when docking since the wind often takes away the choice of which side to put towards the dock. If you only have one door then half the time there is no way to get from the cockpit to the wharf!

The instruments included are Air Speed Indicator, Altimeter, Tachometer, Hour Meter, Compass and for the 503 a Cylinder Head Temperature gauge.

A 10 USgal fuel tank is included as standard.

For maximum speed, and good looks, the package includes the fibreglass nose fairing and three-piece mid-wing gap covers as well as full streamline strut and gear fairings plus wheel pants for the mains and nose gear.

The landing gear includes upgraded main gear legs of 2024-T3 aluminum with chromoly steel inserts and an oversized nose fork. All three wheels are upgraded to heavy duty oversized aluminum rims with larger tires. This Canadian wheel and tire setup is excellent for virtually all rough or soft surfaces. For extreme conditions you can use the same wheels and simply install tundra tires. The new third generation brakes are included.

The Challenger II 503 Deluxe Power Pack is centered on the Rotax 503 UL DCDI engine and includes everything you need to create thrust and go.

This engine, purpose-built for aircraft and well-proven via thousands of real world installations, has numerous internal improvements to enhance reliability. The engine comes complete with dual electronic ignition, two spark plugs per cylinder, dual carbs, impulse fuel pump, air filter and a very effective muffler. To attach this engine to the airframe we include the motor mount with Lord mounts to isolate the airframe from vibration as well as a stainless steel exhaust mount.

The 503 is air-cooled via an engine-driven fan and is virtually immune to overheating on even the most trying days in the most trying circumstances.

An integrated generator produces AC current (12V 170W) which is converted by the supplied regulator/rectifier to 12V DC (nominal). Electric start is standard including solenoid and wiring. Also included is a backup manual recoil starter.

The reduction drive is the preferred "tall" 2.6-to-1 unit. This turns a highly efficient 60" two-blade fixed pitch wooden prop. This prop is the simplest, lightest and most economical choice for the 503 and it gets out 100% of the horsepower. With the 503 there is no advantage to turning a 3-blade prop, in fact performance would actually diminish.

CHOOSE Wing Span: long = 31.5 ft for max lift for floats and soaring OR clip = 26 ft for more speed and maneuverability. (See also chargeable 29.5 ft option.)

CHOOSE Cabin: wide with low cockpit side rails OR narrow with high sides.

CHOOSE Lexan: tinted OR clear wraparound windscreen and doors.

CHOOSE Prop: fine pitch for best takeoff/climb OR coarse pitch for cruise.

The 29.5 ft wing span is achieved via a special fibreglass "Hoerner" wingtip that takes a foot off each side. The wing itself is the same as the 31.5 ft version but the standard 1.5 ft bow wingtips are replaced with the optional 0.5 ft ones.

The benefits are a slightly higher cruise speed (still not a Lear jet though!) as well as a quicker roll rate for more sporty handling. This mid point between the long wing and the clip wing is suitable for float operations.

The factory 17 USgal long range fuel tank represents by far the best value in terms of dollars per gallon versus other large aftermarket tanks. Many owners install long range tanks for their convenience and flexibility.

This option upgrades the propeller with Uralight epoxy leading edge protection to mitigate the impact of spray, slush and rain. Leading edge protection is strongly recommended for operations on floats.