Ahrens developed AR 404 twin-turboprop 30 passenger or cargo transport, intended to be simple to maintain and having a constant square-section fuselage to provide maximum volume.
Designed by Peter Ahrens in Cali¬fornia for production in Puerto Rico
The prototype N404AR first flew on 1 December 1976, piloted by Herman “Fish” Salmon, followed by the first production-standard aircraft built in Puerto Rico in October 1979, but program halted through lack of funding.
The Ahrens 404 is designed for simple manufacture, harsh conditions, easy repair, the four turboprop utiliplane featured an aft loading ramp.
One other was built, N1028G.
AH 404
Engines: 4 x 420hp GMC-Allison 250-B17B
Wingspan: 65’0″
Length: 48’4″
Useful load: 9400 lb
Max speed: 210 mph
Cruise: 160 mph
Range: 1380 mi
Seats: 31
All Aero 