Related Clues:

• Cousins of monorails
• Tiger's rival Ernie
• Trains overhead
• Old measures equal to 45 inches
• These wings don't flap
• Urban transportation
• Some connecting pipes
• New wings
• Pipe bends
• 2002 British Open champion
• Ernie of the PGA
• Railways with a view
• Subway relatives
• Blueprint features
• See 55-Down