Turbo Research was in the midst of designing their first engine , the 3,000 lbf TR - 4 '' Chinook '' , and it was decided to continue working on the Chinook to gain experience even though they had no intention of producing it .
Turbo Research was in the midst of designing their first engine , the 3,000 lbf TR - 4 '' Chinook '' , which could easily be scaled up for the new fighter design . 
 It was decided to continue working on the Chinook to gain experience even though they had no intention of producing it .