Technical information

3 - 2 - 1 BUILD !



The New Whisper X350 Gen II is available in several options, Basic Kit, Standard Quick-Build-Kit and Ready-to-Fly.


Ranging from  450hrs, 400hrs to 16 hrs  build time.


The standard kit can be purchased in sections to suite your time schedule, budget and space. Each section has its own quick build option allowing you to save some construction time.


The kit has been designed should you like to purchase it sectionally to have the fuselage completed first, this means within a couple weeks you'll have a fuselage ready for interior mock-up and engine installation.


Alternatively you can purchase the Empennage Kit and complete it first, we offer the X350 Gen II kit in a wide range of configurations making it perfect for a first time build.


We are proud of the fact that our customers will have very little fiberglass work to do, depending on the kit you select. However, there is some to be done.


The Whisper X350 Gen II Kit includes all items and hardware required to complete a standard kit, this includes all control assemblies and Grove wheels and brakes.


The X350 Gen II uses AN hardware throughout the aircraft ensuring easy availability of parts.


Our factory carries all replacement parts in stock to minimize any delays in receiving  parts.


The X350 kit can be completed in +-400 hrs depending on your current skill set, when you receive your kit all structural parts and large surfaces will be completed, the kit ships with a base coat already sprayed to insure product quality and ultimately the finished aircrafts quality. The kit ships with complete built Wings, Horizontal Stab, Rudder, Flaps, Ailerons, Elevators and Fuselage. Within a couple days your aircraft will be ready for motor installation.


Photo by Patrick Davidson, Red Bull Air Race Pilot.


"The X350 Gen II is one of those kit aircraft that makes you grin every time you take to the sky.

To say the performance is spectacular would be an understatement indeed!

It's one of those unique and rare aircraft that does everything well "

The X350 Gen II is  an affordable, two-seater, “light” aerobatic sport aircraft designed for cross-country trips, it features a limit load factor of plus 6.0 g’s and minus 4.0 g’s.


The wings feature a carbon fiber structure tested to an ultimate load factor of 12.0 g’s. The Gen II’s wing tanks have a total fuel capacity of 63 US gallons, giving a range of 1,000 nautical miles and an endurance of over 6 hours. This factors in taxi, takeoff and a 45-minute fuel reserve. The aircraft also has one of the widest interiors on the market today, featuring optional leather interior and plenty of baggage room making the Gen II perfect for comfortable cross-country trips.


The X350 Gen II uses a 180 to 200 horsepower engine and has an “economy” cruise speed of 155 knots (178 miles per hour) and a “sport” cruise speed of 175 knots (201 miles per hour). It offers a useful load of 926 pounds and 538 pounds with full fuel.


The X350 Gen II kit allows for a variety of customization. It features a large and modular avionics panel. The interior of the aircraft is not structural giving the builder almost unlimited possibilities to customize the interior.  To maximize comfortability within the cabin, the carbon fiber canopy frame contains integrated air channels to flow cool or warm air to where the builder choses to place the air outlets.

The Gen II also features a “tricycle” or “tri-gear” undercarriage, giving more options to the builders.


The X350 Gen II kit is an extremely easy-to-build composite aircraft, with a little over 425 hours required to have the aircraft in the air. The kit was designed with the “first-time-builder” in mind and would appeal to a builder that desires an aircraft with sleek lines that offers comfort without sacrificing performance.


The X350 Gen II kit can be built in a double garage and requires no “special” tooling to complete. The kit includes Imperial AN hardware and all items and parts required to complete the aircraft except the engine, engine mount, avionics and propeller. However, these items may be purchased with the kit for the builder’s convenience.


A well-detailed construction manual (featuring ample illustrative photographs) is provided with the kit. Quick assistance can also be given by phone  or  via SKYPE call. Whisper Aircraft have a growing builders forum too, where owners can share their construction experience and knowledge.*


*All current build forum aircraft are 1st Generation Whisper Aircraft. 1st Gen X350's is 10% completed kits.

**Engine, engine mount and avionics are excluded in the standard kit, however  they can be supplied.

Whisper Aircraft Logo


* Final performance may vary slightly


The X350 Gen II is the pilot’s plane. It expresses the pilot’s bold statement and style. The exterior paint style and color scheme will be your most important stylistic decision.


It will also be the reason for envy both inside and out of the hangar.




X350 Gen II is Personalized to Suit Your Taste



A Optional full-leather interior, generously crafted seats (with perforated accents), leather on the instrument panel and the inner lining of the doors, as well as black leather trims, is an elegant and sporty result; which fits perfectly into the overall concept of the X350 Gen II.

Loading Whisper Aircraft...






Engine Mount

Gear Configuration

G Loading




Overall Length



Width (interior front)




Gross Weight

Empty Weight

Useful Load

Max Fuel Load

Useful Load Full Fuel


Lycoming / Superior / UL Power

160 hp / 180 hp / 200 hp

Dynafocal / Conical

Tail Wheel / Nose Wheel

+ 6.0, - 4.0




22 ft 6 in / 6.30 m

6 ft 2 in / 1.9 m

26 ft 2 in / 8.00 m

47.2 in / 1,193 mm




2,138 lbs / 970 kg

1,213 lbs / 550 kg

926 lbs / 420 kg

388 lbs / 176 kg

538 lbs / 244kg

Coming Soon




Fuel Capacity                                     

Fuel Consumption ( 55% Cruise, typ)

Fuel Type


Projected Performance at Sea Level - 180HP


Top Speed (typ)

Cruise Speed - Sport  (typ 75%+ Power)

Cruise Speed - Economy  (typ 55% Power)

Stall Speed

Take Off Ground Roll

Landing Distance

Rate of Climb

Max Operating Altitude

Range (Incl. Reserve, Taxi, Takeoff )

Endurance (Incl. Reserve, Taxi, Takeoff )




Tri-Gear Configuration                             Custom Leather Interior

Quick-build Option                                    Additional Fuel Tanks

Ballistic Recovery System                       Tinted Canopy

Dual Center Stick Controls                      Leading Edge Landing Lights




63 USG / 240 liters

8.5 USG/hr / 32.17 liters/hr





184 kts / 211 mph / 340 km/h

175 kts / 201 mph / 323 km/h

155 kts / 178 mph / 287 km/h

52 kts / 60 mph / 96 km/h

984ft / 300m

984ft /300m

1,540 ft/min / 7.82 m/s

25,500 ft / 6,858 m

1001 NM / 1,854 km

6:46 Hours





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