Flight safety is something all pilots speak about. They Reside it, settle for it, and usually hope to decide on it of their day-to-working day lives inside the aviation planet. For that Tremendous Cub fanatic, the Extended Slotted Wing from Dakota Cub gives pilots the opportunity to greatly enhance their security margin in addition to boosting the climb overall performance of the plane.
Imagine traveling your Super Cub in a high angle of assault with the airspeed indicator looking through twenty mph, then rolling into 60-levels of lender and initiating a climbing spiral even though selecting an influence placing which is fewer than whole throttle! That is definitely The standard exhibition that sells the Dakota Cub Extended Slotted Wing. The next most talked about high quality of this wing is the chance to have entire flight Regulate authority at large angles of assault. No additional smooth controls, plopping it down, or wing fall on stall.
Mark Erickson, the founding father of Dakota Cub, started his mission within the 1990’s. All he desired was a Cub rib. Almost nothing from Piper was available at an affordable Price and Considering that the Piper ribs had been so fragile, he chose to build his very own. He used modern-working day engineering to an outdated Piper wing that was originally developed for that YL-14 liaison version of the J5C Cub. The YL-14 wing was a slotted wing. In line with Erickson, there were only fourteen of those slot pg plane crafted before the close of World War two. They were being especially engineered for short consider-offs of one hundred-feet and climbs with high angles of assault. You will find only two of those nonetheless within the air right now – one particular in Spain; the other in Nebraska.
The Dakota Cub Prolonged Slotted Wing has numerous variances in comparison to the initial Cub wing plus the L-14 wing for that matter. Erickson revised the original Piper US35B airfoil useful for the L-14. He produced a customized “T” shaped extrusion with the same dimensions that when used in creating a truss-style rib, is lighter, less complicated to work with, plus much more strong than the initial wing. Erickson obtained a STC for The brand new wing in 1993.
Erickson’s new rib only provides seven lbs to the load of every initial Piper wing. The brand new wing has long been structurally examined to in access of 2,200 lbs, nevertheless, the STC restrictions the gross fat to one,750 lbs for the initial wing or 2,000 lbs for those wings Outfitted with the Wipaire 1 Ton Cub STC. This artificial reduction will with any luck , be improved in the future. Inside the intervening several years, Erickson has intended ribs and many other sections which might be FAA PMA-ed for all rag-wing Pipers. Erickson was granted the STC for the entire-length leading edge slot in 1998. This slot helps protect the boundary layer of airflow at slow speeds. On top of that, Erickson engineered a squared off wing and got rid of the idea bow giving the wing a further six% surface spot, improved the flaps which ends up in forty four% more flap region, and pushed the ailerons outward 23-inches to the edge of your wing. He calls it the “Prolonged Wing.” The squared wing adds about eight lbs to the initial Piper wing.
Introducing a slot into the Extended Wing provides another nine lbs per wing, although the amplified protection envelope from which to fly is nicely well worth the trade-off. The flight qualities of your squared-off and slotted wing, which Erickson calls the “Extended Slotted Wing”, is the first edge and emphasis with regard to option of wings to include as part of your Cub project. The Extended Slotted Wing is the greatest performing wing provided by Dakota Cub. It’s a 135-inch slot, a squared-off wing with 102-inch ailerons, as well as a ninety.twenty five-inch flap. Dakota Cub also provides the common Cub wing along with a squared-off wing without the slot.
The Prolonged Slotted Wing is just a safer wing. It permits an increased vital angle of attack, slower stall pace, and virtually eliminates the unexpected lack of lift rather than a straight wing. It delays the separation in the air stream in the wing area, As a result aileron authority is taken care of and in lots of scenarios the sole sign of the stall will likely be an increased-than-usual level of good. This phenomenon enables the sink charge of the aircraft on approach to landing for being managed by electrical power by yourself enabling a far more precise touchdown point with out concern of a wing stalling or slipping off on one aspect. The wing also has an improved roll level because of the ailerons becoming prolonged to the top from the wing.
If you would like consider full advantage of the Extended Slotted Wing with your Tremendous Cub, then it is suggested to set up a three-inch gear extension. The gear extension allows the sluggish velocity abilities with the wing to acquire complete effect upon landing. Greater tires will offer for this too. Limited gear coupled with tiny tires will result in tail wheel first landings and also a consider-off operate that’s lengthier than ideal mainly because it’s tougher to accomplish that bigger angle of assault.
The final result of All of this innovation is often a Cub which has greater climb effectiveness, greater sink Regulate, slower landings, in addition to a A great deal better margin of basic safety. A wide-human body fuselage from Airframes, Inc characteristics an extended fuselage, and when coupled with the greater Handle surfaces and the slot, a pilot can fly at a 45-diploma nose-up Angle, land at 25 knots, and continue to Have a very wing that hangs while in the air.