I wanted to advise the readers about our STC for 400 series twins Cessna’s that improves cruise speed and climb by a measurable amount. There has been articles in Twin and Turbine (October 2012) as well as the Twin Cessna Flyer (January 2013). In addition, the forum of Twin Cessna Flyer have been ablaze with; in order, doubt, curiosity, interest, amazement and satisfaction. Needless to say, while simple in concept, the new result is an improvement of fuel efficiency of 5-10% depending on how you use the increased lift and performance change. What is most impressive is that they work at all altitudes but work even better when heavy or up high due to the higher angle of attack. The shape and engineering has been perfected and refined with the aid of computer assisted design (CAD) and is covered under a United States patent.

 

Currently they are approved for the 402C, 414A and 421C. FAA paperwork is being processed to add the Cessna 425 and 441 Conquest series at this point in time. Plans are for adding the Cessna Citation series in the Summer of 2013. We have 2 Cessna 425’s flying now with the wheel covers and have recorded cruise speed increases of 9KTAS at FL250 (both with spar straps). Similarly, the Cessna 421C’s have been reporting cruise speed increases of 6-13 KTAS at various altitudes. Twin-engine climb rate increases have ranged from 100 fpm at sea level to as much as 350 fpm at and above FL200. Pilots are reporting that the plane climbs better now even with a higher climb speed. These properties will certainly reduce the time and surface area exposed to icing conditions, which has been and is a concern to all 400 series cabin-class operators. The ability to climb thru FL200 without having to pitch up to 120- 125 KIAS will greatly increase the safety margin and reduce pilot stress.

 

Besides the improved performance, fuel efficiency, payload and range, the added performance will most certainly improve the resale value of certified aircraft. In lieu of adding 25 hp per side, the STC should propel the 400 series as a serious contender in the persistent demand for cost effective business and personal travel for entrepreneurs' and small businesses.

 

Premiere-Aviation Inc. is a small company based in Concord, CA (KCCR), we can be reached at (925) 788-9010, premiere-aviation@comcast.net or visit our website www.premiere-aviation.net. The cost of the STC including all components is being held at $2000.00. This puts it as the best value in performance improvement options available in the general aviation industry. Premiere-Aviation Inc. has several additional modification that will be certified in 2013 that will reduce the gap between the 400 series pressurized twins and the King Air 90 series.

 

 Any questions, feel fee to contact me Peter Danto at the above contact.