The Manhattan Project was a highly classified operation, so it's possible a person with that name could have been involved but their records were never made public. However, without further information, it's impossible to verify this.
To better help you, could you provide any additional details about Frank Winters? For example:
* What role do you think he played in the Manhattan Project?
* Do you have any more information about him, such as his area of expertise or where he worked?
* Do you have any source or reference that mentions him?
With more information, I can provide a more accurate and helpful answer.