Wing extension STOL CONVERSION is FAA STC and Canadian STC approved on the following CESSNA series of single engine aircraft: Cessna 170,172,175,180,182,185 all years and all models.

WING-X STOL will increase your flight performance by as much as 30% and your gross takeoff weight by 50 to 400 Lbs depending on the models . You can now carry that extra passenger or payload and still have great performance.

Improve your aircraft performance by adding more than three feet to the wingspan or approx. 12.4 square feet of wing area to your aircraft. "More Wing More Lift it's that simple". The Wing-X STOL modification has a specially engineered wing Reinforcement along the main spar. This modification increases the overall strength of the wing and allows for an important gross weight increase on most models.

Cessna 170,172,175 airplanes will benefit from a GTOW increase varying from 50 to 125 pounds depending on the year and model.

All C-180 and C-182 owners will benefit with a GTOW of 2,950 lbs. approved on wheels, floats and skis as well as providing enhanced performance throughout the flight envelope.

Cessna 185 owners will immediately benefit from an increase of 175 lbs. in the useful load and a newly certified GTOW of 3,525 lbs. approved on wheels, skis, amphibs and straight floats.

Please visit Gross weight/ CG graphs to see the gross weight increase and CG Graphs per model.



Flight performance summary*
  1. Reduced stall speed;
  2. Reduced takeoff and landing distances;
  3. Reduced water landing impact loads by 8%;
  4. Increased takeoff performance by as much as 30%;
  5. Increased rate of climb by 12%;
  6. Increased lateral stability in all phases of flight;
  7. Increase service ceiling by almost 1,000 feet (7% more wing area);
  8. Increase cruise speed 2% at cruise settings of 65% and 75%;
  9. Increased fuel performance 1% to 2%;
  10. Increased flight safety margin and stability at low speed;
  11. STC approved in combination with other STOL kit modifications on all series of Cessna 180, 182 and 185 on wheels, skis or floats.

* Flight Test performance averages are based on pilot technique as demonstrated on various aircraft models and configurations. Cessna 180 tested at 3,194 lbs. Cessna 182 tested at 2,950 lbs. Cessna 185 tested at 3,600 lbs.Cessna 206 tested at 3,800 lbs.

Increase gross takeoff weight**

  • Cessna 170, 172, 175 from 50 to 125 lbs.
  • All Cessna models 180, 182 GTOW 2,950 lbs. Approved on all series. Some late model Cessna 180's approved at 3,190 lbs. when combined with additional modifications.
  • Cessna 185 models GTOW 3,525 lbs. approved on all series and in all configurations.
  • Cessna 206 series gross take off weight 3,600 lbs. There is no gross weight increase available for the 206 series.

* * Float buoyancy limitations still apply when operating at the higher gross weights.

Wing Extensions are a Canadian product sold throughout the world manufactured by Air Research Technology Inc.

Air Research Technology Inc.
3440 McCarthy Street
Montreal, Quebec
Canada H4K 2P5
Toll Free: 1-888-325-2588 (in North America)
Tel.: 514-337-7588 (international)
Web Site:

Contact your regional distributor

Please contact your nearest "Wing Extension" or "Wip-Tip" distributor, or use our on-line form to request more information. You can also email us at 


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