A few years back "collective management" was all the rage. This was something the hot pilots had figured out. In general terms, hot pilots have their helis setup for extreme pitch, aileron and elevator. Like maybe 14/10/10 degrees (or more if they can get it). These kinds of settings can cause blade stalls at the extremes. Also, power systems can't keep the head speed up with these extreme blade angles.
The answer is use extreme blade angles sparingly. That is, manage your collective. Also, faster head speeds help but, there is a limit to what power systems can deliver. Cyclic rings are also used to keep from poping links and binding in the corners.
Since converting my 450 to flybarless, I can finally start to get the kinds of pitch, flip and roll speeds I've been after. However, after cranking up the pitch from 55 to 60 in the swash mix, I started getting blade stalls when trying to pull out at the bottom of loops and, at other full (left) stick moves. This was exciting the first time it happended. I was diving towards terra firma out of a loop and slammed the stick to pull out, the blades started barking like a pack of dogs and the heli response turned to mush. Amazingly, I realized the problem and pulled back on the collective. The blades came out of stall and the heli recovered.
Then it hit me,
collective management! Since that is too much work, I just upped the head speed from about 3000 to about 3300 RPM.
jrohland
07-03-2008, 05:20 AM
Learning to fly--collective management
Linear Mode
