The Horton STOL Conversion will give the advantage of taking-off and landing at a slower speed, the ability to get out of grass strips easier, obtain better performance at high altitudes, with better aileron control at low speeds, reduce the tendency to spin and reduce the stall speed.
The slow landing performance is not your main concern but safety is. The Horton STOL conversion will provide that extra margin of safety. In the event of an engine failure and you are forced to land in an unfamiliar area, the STOL conversion gives you more time and control of your airplane by allowing you to reduce forward airspeed, while reducing the sink rate.
The combination of these results will give you the possibility of touching down at a fraction of the normal speed, the chances of personal injury and aircraft damage is greatly reduced.
Your aircraft will be modified with only the necessary and approved items to improve take-off, slow flight and landing characteristics.
Only STC's and certified materials and quality parts are used in the Horton STOL conversions. The FAA has issued a Parts Manufacturing Approval (PMA) to Horton STOL-Craft for the production of our STOL conversions.
The Flight Bonus packages includes five components, including streamlined nose gear, streamlined main gear, a cowling and propeller closure kit, low drag wing strut fairings and a contour kit, plus flap well and aileron gap seal kits.
The new torque link replaces the original Cessna scissors torque link. Hortons link holds the front tire above the slipstream of the propeller, so that the nosegear doesnt drop down on takeoff and become a speed brake. The new cowl fairings are simply attached over the lower portion of the Cessna lower cowling. These new fairings direct the slipstream around the nose gear and nose gear strut for a reduction in overall drag
A 1991 Aviation Consumer article that reported a speed increase of 14 knots following the Flight Bonus installation on a 1968 Skylane.
The 180 up to 200 HP increase for the Cessna 172. Currently in the experimental/exhibition category. The powerplant is a LS3 V8 engine that is getting 5 GPH on 87 octane pump gas @ 2500 RPM cruise settings. . The prop is a fixed pitch prop. The prop will be available in a 2 or 3 blade with 3 ground adjust setting of climb, cruise, and speed settings.
Upon certification - the HP will be the 180 HP version. Advantages of this powerplant are: 87 octane pump gas at 5 GPH efficiency/200 lb increase useful load increase/longer TBO/quicker overhaul/much cheaper motor options
Frequently Asked Questions
What is the average installation time?
The average installation time for a Horton STOL Kit is 35-40 hours plus painting time. The average installation time for the Horton Flap and Aileron Gap Seals is 8.5 hours, plus painting
What kind of performance changes can I expect?
While we have brochures which were published with ideal test results and converted to standard conditions, we find there can be a test difference of over 10% in the same model, same year of aircraft, in various categories. The different efficiencies in engine and propeller performance, aircraft rigging, and pilot capability adds to the complexity of the comparisons.
On an average you can expect to get a 4-7 knot reduction in stall speeds. Flying at these lower stall speeds you can reduce the take-off and landing distances by 10%.
Can I purchase replacement wing tips now and later on purchase the rest of the kit?
Horton's replacement wingtips are not interchangeable with the Horton STOL conversion, if at a later date you decide to install the STOL kit. Replacement wingtips fit to the existing Cessna leading edge cuff. Wingtips used in the STOL kit extend out to fit the new modified leading edge.
What additional charges could I encounter when installing a STOL kit?
Some of the additional charges you may encounter when installing a STOL kit are:
- Labor and material required for painting. - If weight and balance on the aircraft is not current, you may want to weight the aircraft. - Models that require a wingtip exchange, may or may not need to have the navigation and or strobe light retainers changed to conform to the new fiberglass wingtip. - Retainers changed to conform to the new fiberglass wingtip.
Can I install a Horton STOL kit, but keep my original wing tips?"
Horton STOL conversion the STC requires the use of a drooped wing tips, but they do not have to be Horton wingtips. Horton's does provides the fiberglass drooped wingtips with the modification that extends out to conform to the new leading edge cuff which will eliminate any drop off between the leading edge cuff and wingtip.
PARTS FOR STOL KITS
WING FOIL MODIFICATION
Very important is the addition of a special leading edge which increases the leading edge profile. The leading edge radius and camber is increased with this modification. Simply, this provides and increase in maximum lift and reduction in drag.
For the owners of new Cessna aircraft with the Camber Lift Cuff, HORTON STOL-CRAFT has designed and engineered a new leading edge, for increased performance, to replace the Cessna Camber Lift Leading Edge.
CONICAL CAMBERED WING TIPS
Low speed aileron effectiveness is improved by special wing tips. Induced drag is further reduced since the HORTON STOL-CRAFT tips reduce wing tip vortex strength. They also increase the wing area and decrease the stall speed.
As you recall from your flight training days, modern general aviation aircraft are designed in such a manner that the stall starts at the inboard portion of the wing and then moves outwards as the angle of attack is increased.
The HORTON STOL-CRAFT stall fence controls the stall span wise progression and therefore maintains longer aileron effectiveness through higher angles of attack.
As a result, the low speed handling qualities of the aircraft are greatly enhanced, and then lower portions of the wing, depending on the aircraft manufacturer.