The Invincible D-D was a prototype three/four seat touring aircraft, built in the US in 1929. One example flew but development was ended by the Great Depression.
The Invincible D-D was a prototype three/four seat touring aircraft, built in the US in 1929. One example flew but development was ended by the Great Depression. (en)
The Invincible D-D was a prototype three/four seat touring aircraft, built in the US in 1929. One example flew but development was ended by the Great Depression. (en)