Hello, good idea as there is much more aicrafts than with previous RF versions. Can you give some exemples of the typical words you will use (electric, gas, turbine, .. isn't necessarily in the name).
@tomer568, good news! It already exists. In the aircraft selection dialog, click the "Show Filter" button or press Ctrl-F on your keyboard to open the filtering options. Simply start typing to show only vehicle names matching certain text (try "cub", for example), then hide the filter options to see the results.
You can also use Ctrl-F while flying to use the Quick Load dialog.