Pawel
That Skooter is looking great. I love the lines of this classic aircraft. The wells can pass off to staining and grime buildup.
The K's engines got modified too but not visible with the cowlings on. The cowls were modified by deleting the scoop at the front top lip and adding one on the top aft section,but some of the K's pictures at NKP I have seen had the older style cowl. I forget who makes a resin update for it but I'm leaving the old stile cowl on mine..
Bish
Reading from the A-26 Invader in Action Squadron Series book, it details that the K's were highly modified by a firm called On-Mark Engineering Company located in Van Nuys, California in 1964. The wings were strengthened and rebuilt and the fuselages remanufactured without the turrets. They added the beefier KC-135 brakes and tires, Pratt & Whitney R-2800-103W, a monster prop, enlarged dorsal fin and updated avionics. They served with the USAF 609th SOS well into late 1969. The last known fully armed Invader in military use made its last flight in July of 1977 under Indonesian Air Force service.
The Invader aircraft had quite a colorful and long service record starting in WWII, and going thru Korea, the Congo, Angola, Cuba and Nam.
Back in the early 1980's, my police sub station was located just west of the Miami International Airport. We had an aviation firm a block away and I recall them having a fairly stripped Invader fuselage with partial instrumentation on their property. I actually went on board and sat in the pilot's seat. I took a picture of this and now I'm on a mission to find it. I know I have it somewhere.