Question
There has been an X-plane intended to investigate steering by thrust vectoring. Which number did it have? (You are encouraged to use this link)
The X-21
The X-27
The X-31
The X-34
The X-21
The X-27
The X-31
The X-34
Answers
GPT-4o mini
The X-plane intended to investigate steering by thrust vectoring is the **X-31**.