Many new things have been going on with the C4 program recently and we thought it would be an appropriate time to bring you up to speed. As most of you know, The Flight Design C4, the new advanced four-place GA aircraft, achieved its first flight on April 9th 2015 at Kamenz airfield (EDCM) in Kamenz, Germany. The successful test flight was performed by Damian Hischier an FAA and EASA approved test pilot living in Switzerland.
The flight lasted one hour and the C4 was tested for basic handling, longitudinal trim, spiral stability in 20 and 30 degree banks, approach to stall and practice go–arounds. The primary engine operating parameters were also confirmed. The test flight was performed in a special test area at an altitude of 5500 Ft. MSL.
The process for flights by a non-certified aircraft in Europe is different than in the U.S. The plane is issued a “Permit to Fly” under a process involving EASA and the local CAA, in this case the German LBA. In meetings with EASA managers the basic design is reviewed, the load tests and aerodynamic calculations are verified and the flight-conditions for the test plan are approved.Prior to the first flight, the C4 passed numerous ground tests including control stiffness tests, a ground vibration test from an independent engineering firm and a powerplant installation audit by a Continental Motors engineering representative.
Since the first flight, additional flight tests have been performed to open up the weight and center of gravity envelope to establish a baseline stall speed at gross weight and the most forward center of gravity for stall speed determination. The C4 has now flown at 2640 Lbs. (1300 Kg) and shown a stall speed of less than 54 kts. The rate of climb has been demonstrated to be in excess of 950 FPM at gross weight and a cruise speed can now be projected of 145 Kts. The airplane is still in very basic condition aerodynamically (no fairings, rough wing profile) and as such the top and cruise speed can only be projected at this time. Upcoming tests are planned during the next few months to further open up the center of gravity envelope aft, more stability tests and more detailed performance testing.A photo Essay of the C4 first flight Day 4-9-15 By Tom Peghiny Flight Design USA
Taxing out to the departure end of runway 21 at Kamenz The C4 climbing out over the German countryside30degree banks were spirally neutral as expected Looking good EZFD, how about a formation break? See you on the ground! Back in the hangar for disassembly for the Aero Expo The Continental IO-360AF FAA Type Certified
Safety Box Program Update
In cooperation with the province of Jiangsu, AeroJones is breaking ground on a 250,000 square foot, brand-new production facility based in the city of Changzhou. AeroJones will produce airframes for the Light-Sport CTLS as well as Flight Design’s certified four-seat C4.Test Pilot Damian Hischier
Damian did the certification flight testing for the EASA certified version of the CTLS and is a graduate of the National Test Pilot School (NPTS) located at Mojave, CA. USA. Damian is an accomplished engineer, project manager and test pilot. He has experience with experimental and certification flight tests on Part 25, Part 23, LSA and Experimental aircraft. He holds an EASA Category 1 Flight Test Rating, an EASA Class 1 Medical (FAA equivalent) is a current ATPL, has flown 102 aircraft types. In addition he is a Bachelor of Information Sciences and Software Engineering and has provided technical expertise related to flight test and aircraft operational issues in support of design development activities. In addition to Flight Test duties for Flight Design GmbH., Damian works with other light aviation companies including, Stemme and Aquila.
Thank you for your continued interest in the C4. With the first flight of the C4 proof-of-concept, we are excited to be able to stay in communication with all interested C4 customers. We will continue to print new information about the program as it becomes available.