Believe me I've tried every combination of pitch/throttle available on the radio that came w/ the package.
It's a Futaba FP-6VH and is no more advanced than my 20 year old Airtronics radio (other than it's about 1/5
the price). I talked to the guys @ great planes & they seem to have never flown this combination even though
they sell it as a package. They all seem to use the EMS w/ CCPM. The package uses MMS with the whole servo
tray sliding back & forth for collective.
ORIGINAL: ncrego
I'm betting low headspeed. Change your throttle/pitch curves for less pitch and more throttle.