Yak-18A (Yak-20) by A.S.Yakovlev ('Max')

87k color photo, courtesy of 9see his periodically changing Page)

The Yak-18U with tricycle landing gear turned to be somewhat overweight for M-11FR engine. When new A.I.Ivchenko AI-14 9-cylinder became available, it was quickly fitted to Yak-18U airframe. Smaller outer diameter allowed to replace helmet-type cowling to simple NACA-type with cooling gills, providing all-new look to the aircraft. New metal V-530-D-35 two-blade controllable pitch propeller was installed.

Other changes included metal skinning extended back to the tail, fin area increased (by a small dorsal fillet). Canopy was slightly enlarged, with new raked whip aerial installed. On some late production batches more powerful AI-14FR was fitted, boosting top speed of Yak-18A to the 300km/h.

Yak-18A was first mentioned by Soviet Press as Yak-20.

1052 were assembled in the USSR (Kharkov and Arsenyevsk) during period from 1957 to 1962, and 1796 more in China.

Predecessors	Modifications
Yak-18U	Yak-18P

References	Links
"Russian aircraft since 1940" by Jean Alexander, p.449...454;	Yak-18A at the Knowledge Adventure Encyclopedia; Yak-18A Yak at UK	Yak-18 at Virtual Aircraft Museum Yak-18, Yakovlev 'Max' YAK-18T Max DOO Flightsimulator page by Oleg Devjatkin;