Complex sentence: A third and final Brikken was first flown on 3 May 1914, similar to the second but fitted out as a trainer with dual controls; the skids were slightly altered by cutting off their upturned ends.
Split into simpler sentences: A third and final Brikken was first flown on 3 May 1914. It was similar to the second but fitted as a trainer with dual controls; the skids were slightly altered by cutting off their upturned ends.