Christianbothe From Germany, joined Jan 2000, 124 posts, RR: 0
Reply 1, posted (13 years 8 months 3 weeks 4 days 20 hours ago) and read 1052 times:
the stream of hot exhaust gases on the upper side of the wing causes an increased lift (the so-called Conda Effect). Besides the chances of FOD is lower, so it can be used on primitive airstrips. But it is harder to maintain and check the engines.