RE: BVM BobCat and Wren 54
Well, my BobCat (the original) has knocked up over 200 flights with a PST 600 in temps as high as 40 C inc off a short grass runway and still going strong . Been timed at 199 mph from a shallow dive and will do a vertical 8 from the bottom up . Its light and fuel efficient, a delight to fly, now with Spektrum 2.4 More power = a bit more speed and more vertical, (and higher fuel burn) as on my XL with a JetCat P70. You simply dont need more than a PST 800 or Wren Supersport, both wonderful engines.
Regards,
David Gladwin.