Kress thrust???
I've heard that with a thrust ratio of 1:2, you'll get pretty good performance. With 1:3, you get moderate performance, and with 1:4, you get sluggish (but still fliable) performance. Of course with a 1:1 or better, you should be able to get vertical performance!
Can someone else back me up on this one?
If you can, post some picts of your plane!
Talk to you later
Russ