My mob was very slow to buy the B-727 so for a number of years we flew the DC-9-32 on legs much longer than it was really designed for. In order to get the required fuel and payload into the sky we bought zero flap T/O data from Douglas and used it quite often on certain segments. Slats were of course extended.
This used to produce some interesting R/T at U.S. airports:
"Uh, Air Canada, this is XXX behind you - you know that you have no flap out?"
"Affirmative"
"Y'all going flying that way?"
"Affirmative"
"Ummmm...."
On a hot summer day those little nosewheels sounded awfully close to their critical speed underneath the floor!