Leadscrew force and efficiency calc spreadsheet uploaded

I have up uploaded a spreadsheet compiled from sources blatantly plagiarized
from the web. It will allow you to calculate efficiency, force, and speed
for different leadscrews and motor combinations.

If any of you mathematical types find problems, let me know and I be more
than happy to fix them.

Richard Spelling, http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma