Uncategorized
Inventor
Composite propeller blade
Counter-rotating propellers
Propeller
Variable pitch propeller
LandOfFree
Frank Walker Caldwell does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with Frank Walker Caldwell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frank Walker Caldwell will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-P-33314