This is the end of 2025 and I nearly give up to do this plane:'v

Flying Magikarp(?)~

SNCAO ACA.5 Kolko

The SNCAO ACA.5 Kolko was a mysteriously unconventional French fighter aircraft concept conceived in 1939 just before World War II. It wasn’t a production aircraft and likely never flew; instead it remained a paper project and wind-tunnel model tested by SNCAO (Société Nationale des Constructions Aéronautiques de l’Ouest), the nationalised French aircraft manufacturer of the late 1930s.

The design came from an inventor/engineer known only as Andre Kolko, who submitted drawings and a patent for his ideas—including a light aircraft, a bomber design (B-5), and this very compact fighter, the ACA.5—to SNCAO. The principle behind the concept was to pack as much of the aircraft’s structure and components as close as possible to its center of gravity, theoretically reducing aerodynamic moments and enhancing maneuverability.

Contemporary reports stressed that many of the high performance figures quoted in the original proposal—such as a maximum speed over 640 km/h or lofty service ceiling—were optimistic or unrealistic, particularly given the lack of provisions for pilot pressurisation and adequate cooling.

Possible Aircraft Nicknames:

• "Kolko’s Cube" : A humorous reference to its stubby, block-like fuselage and compact arrangement.

• "Le Blob Fighter" : A light-hearted name for its unusual silhouette, common on modelling forums that enjoy whimsical nicknames.

• "Wind Tunnel Wonder" : Reflects its life as mainly a wind-tunnel test subject rather than a flying machine.

• "Mini Mess" : A self-deprecating moniker used in hobby-forums poking fun at its odd proportions and questionable aerodynamics (based on typical forum humor around such designs).

• Just add yours in the comments, let's discuss :)

C O N T R O L S
Trim : Flaps, cruising 'rotate' adjuster
VTOL : Further flaps