The Wandering Albatross - with a wing-span of more than 11 feet (3.5m) There is a Wikipedia page on the species - see related link...
About 13 feet across is Maximum Ride's wingspan.
Skating
10 to 16 in across depending on breed
The longest distance across a circle is its diameter
250 kg * m/s
500 kg·m/s
NH1
The diameter (across the widest part) is the longest chord that can be drawn on a circle.
No one has ever swam across te longest river
If you mean the longest length across it then it is its diameter
Longest distance you can drive in fla
It is 250 kgm/s in the direction of the skater's motion.