ORIGINAL: Ernie Misner
And is it too pipey for 3D?
The pipe added a pronounced 800rpm step up and I left the pipe a bit long at that. It isn't a smooth RPM curve any more like the DLE 20 is known for. It is high on the fun factor though. The heli guys in my club laughed at my plane with this long black pipe on it when they first saw it but when I accelerated straight up about as fast as some of their .90 sized helis, there were a few "holy s**t" coming from the gallery.
The down side is that the midrange can be a bit bubbly if you fly it at part throttle for a while but admittedly, I run mine slightly on the rich side since the pipe adds quite a bit of heat to the engine at WOT. The power has about killed the plane the engine is on though (Texas R/C Planes Drastik .60 size). I've broken the rudder and elevator a couple of times and the firewall strength is coming into question despite having beefed this thing up quite a bit when I built it. I'm currently looking for a new plane to put this engine combo on as it is just too much fun. A profile in the 8lb range might be interesting as the power to weight ratio would be right at 2:1.