Timmy can usually make six paper airplanes in an hour. However, if he gets interrupted by his parents, he can only make four per hour. His friend John can make seven paper airplanes per hour. One day, Timmy and John decide to have a three-hour-long contest to see who can make the most paper airplanes. During the contest, Timmy is interrupted once every hour. John also had to take a break and do chores for an hour. How many more paper airplanes does the winner make?

Timmy's rate of making paper airplanes when uninterrupted is 6 per hour, but when interrupted, his rate drops to 4 per hour.

During the three-hour contest, Timmy is interrupted once every hour, so he can make:
Hour 1: 4 paper airplanes
Hour 2: 4 paper airplanes
Hour 3: 4 paper airplanes

Total paper airplanes made by Timmy: 4 + 4 + 4 = 12 paper airplanes

John's rate of making paper airplanes is 7 per hour. However, he had to take a one-hour break to do chores, so he can make:
Hour 1: 7 paper airplanes
Hour 2: 7 paper airplanes
Hour 3: He had to do chores

Total paper airplanes made by John: 7 + 7 = 14 paper airplanes

Therefore, the winner of the contest is John, who made 14 paper airplanes. John made 14 - 12 = 2 more paper airplanes than Timmy.