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Technical information

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"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 offers increased performance and headroom, a full leather interior, dual L&R Controls,  optional Ballistic Recovery System,  optional 2-Axis Autopilot and a more spacious instrument panel to accommodate 10.4 inch EFIS screens to name a few.


The New Whisper X350 Gen II is available in 3 options, Standard Kit, Quick-Build-Kit  and  Ready-to-Fly.


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 Gen II Standard Kit  have some structural and fuselage parts  completed, including the first paint primer coat and most of the exterior work.


The remaining work and finishings includes all electronics, engine fitments and interior work to be done by the owner. No prior knowledge of composites is required or necessary.

Internally, you'll notice a full leather  interior with 4D Carbon Fiber trims and textured Kydex avionics panels. The Kydex is a durable, easy to work with panel, ensuring an easy avionics installation. We import our leather from Italy to ensure quality and durability, as well as comfortability for those long, cross country trips.


The Gen II have one of the widest cockpits available allowing plenty elbow room and leg room making it perfect for cross-country trips.


All parts required to finish the Whisper are included within the kit.  The estimated time to complete the kit will take an average of 900 man hours , depending on your skills or assistance from friends or others.**

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

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


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.





Seats                                                  2

Engine                                               Superior / Lycoming

Horsepower                                    160 hp / 180 hp  / 200 hp





Overall Length                                22 ft 6 in / 6.30 m

Height                                                6 ft 2 in / 1.9 m

Wingspan                                         26 ft 2 in / 8.00 m

Internal Cabin Width                    47.2 in / 1,200 mm




Gross Weight                                   2,094 lbs / 950 kg

Empty Weight                                 1,279 lbs / 580 kg

Useful Load                                     816 lbs / 370 kg

Max Fuel Load                                310 lbs / 140 kg



Fuel Capacity                                               50 USG / 190 liters

Fuel Consumption @ Cruise                  9.25USG/hr / 35 liters/hr

Fuel Type                                                      AVGAS / Unleaded Automotive Gas


Performance at Sea Level


V ne                                                                   200 kts / 230 mph / 370 km/h

V a                                                                    120 kts / 138 mph / 222 km/h

Cruise speed 75% Power @ 6000ft     190 kts / 218 mph / 350 km/h

Stall Speed                                                   52 kts / 60 mph / 96 km/h

Take Off Ground Roll                                656 ft / 200 m

Landing Distance                                       509 ft /155 m

Rate of Climb                                              1,540 ft/min / 7.82 m/s

Max Operating Altitude                           25,500 ft / 6,858 m

Range (no reserves)                                  1,180 miles / 1,900 km





Tri-Gear Configuration                           Custom Leather Interior

Quick-build Option                                 Additional Fuel Tanks

Ballistic Recovery System                    Tinted Canopy

Dual Left and Right Controls               Leading Edge Landing Lights



* Final performance may vary slightly





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.

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.*


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