Here's my Flycat on a fairly modest power set up as described in the video info. Max speed in the mid 70's
Max size 3s lipo was 1600 but only after removing lots of foam. I glassed the fuse from front to beyond the wing leading edge as well as installing carbon flats.
Nice plane but be aware that the elevator looses a lot of it's effect at low speed and it can tip stall unless you keep the speed up
If you are planning a scratch build why not have a look at the SNice-mitar -Scimitar Wing Clone http://www.rcgroups.com/forums/showt...1499635&pp=100
Similar planform and very nice design