The Queen is Chet Morton's bright yellow jalopy. However, in some of the original books it is said to be green or red. A familiar sight around Bayport, Chet is immensely pround of it and spends much of his free time souping up the engine.
In The Tower Treasure, a thief stole the jalopy while attempting to make a quick getaway. The Hardy Boys solved the case after being trapped in a water tower by Hobo Johnny.
Chet was highly distressed when it was stolen.