I recently got asked some questions via PM about this airplane, so I just wanted to post a few of the answers here.
Q- Omega 130 on 4s, is it good?
A- Heck yeah! My first two SuperVypers were built with the Omeag 130g on 4s power. I really liked how well the Omega handled the 750 or so watts with ease, and the 12x6 is plenty of prop for this plane. I even tried a 13x5 and it worked well also, and made some of the 3d manuevers easier. That said, I still thought the 12x6 was the perfect combo with the Omega.
Q- Will it 3D?
A- Yes! Is it as easy to 3D as a 48" Edge? No! This plane is a Hybrid between precision/pattern and all out 3D. So it has to give up a little in some areas so that it can excell at both. What I found was that the wing rock was increased compared to a traditional 3D airplane, such as the 47" SHP or 48" Edge. However, some have said that the extra effort to fly this airplane 3D style transferred over to other airplanes, and made them better pilots. For me, I haven't felt as confident with any other 48" airplane doing both slow and fast Knife Edge passes a few feet off the ground. This airplane completely locks in to KE flight, and really builds confidence.
Q- 4s or 3s, pull-pull or tail servo?
A- I liked it better on 4s. It is such a light (yet strong) design that it was fun to really open the throttle up and zip aronud sideways. 3s wasn't slow by any stretch, but for me, the Vyper really came alive on 4s. I like the idea of a tail servo setup for the rudder, because you can still transittion between 3s and 4s if you want to, just by changing the prop and using a 3s2660 to a 4s2200. With the servo in the tail, you can easily put the CG where you want it by adjusting the battery on the battery tray.
Hope this helps, and I'll be posting a mini-review of a 48" SV that I'm going to start building within the next week to few weeks.