The production I-Z with Townend ring and other refinements. The metal wing of the prototype was supplanted by a wing of wooden construction

The IP-1 in its definitive service form, with large dorsal fin and the recoilless weapons replaced by orthodox guns.

The CCF-assembled G-23, a derivative of the FF-1 operated by the RCAF as the Goblin

The FF-1, the first shipboard fighter with enclosed cockpits and retractable undercarriage.

The Grigorovich DI-3 two-seat escort fighter of 1931

The Grigorovich DI-3 two-seat escort fighter of 1931