"Nothing wrong," said the engineer. "That's what you get with gravital."
"You mean they're supposed to run that way? Overlapping so that for five minutes we have Earth or Earth-and-a-half gravity and then none?"
"It's not supposed to be that way," said Vogel. "But nobody ever built a setup like this that worked any better." He added defensively: "Of course, if you want, you can check with the company that makes these units."
"I'm not trying to challenge your knowledge, and I'm not anxious to make myself look silly. I have a sound reason for asking these questions. There is a possibility of