Nice pictures, RC is my other hobby. I used to be into planes including big gassers and turbines like the ones in your pictures. I then moved into the world of helicopters. Much to the annoyance of my bank balance I've had everything from a small nitro trainer to a big gas turbine and now all electric models. Believe it or not the electrics are far more powerful then anything else I've flown.
In reality I've reduced my RC time as photography has taken more of a hold, partly because I can do it with my better half.