Help with CC 120 Log(Lost power)

[Albertian]

I had a problem today on my second flight,( i have attached CC Log sheets), im running governor mode with 1950,2050,2150. This time i was just trying ST1 which is 2050, when this happened, also for more info i was running Timing @ 5, 8 pmw, and 14 Gov Gain.

i was coming down quickly and the head i heard abit of overspeed, just like the chart shows, then when i tried to recover i lost headspeed FAST!! and it was trying to recover but didnt come out of it it just kept trying i after a couple seconds i hit TH and brought her down. i Ran over expecting the ESC to be hot, but everything was cool ESC,Motor and batterys. so everything looked allright. now keep in mind these battreys were good and charged abut i was running a lower headspeed then normal(2050)

i then tried to spool it up again (twice) and it was like pulsating or missing as i was trying to spool up. (also shown on chart) ?? anyone??

Thanks in advance

[f22warzone]

check your motor to esc connections, bet one has a cold solder joint that vibrated loose on the over speed.

[Albertian]

F22- Thanks, i check them and they seem fine, now i checked my OWB and main gear bolts and they were "semi-loose" i dont know if that has anything to do with surges or anything but the OWB would move the wrong way with little pressure so i did like a previous post and Loctite them and now its solid.

i ran without the head on and everything spooled up good, so i will try tommorow again, and if theres anything else someone could think of im open to suggestions!

Thanks

[ealt]

Originally Posted by Albertian

F22- Thanks, i check them and they seem fine, now i checked my OWB and main gear bolts and they were "semi-loose" i dont know if that has anything to do with surges or anything but the OWB would move the wrong way with little pressure so i did like a previous post and Loctite them and now its solid.

i ran without the head on and everything spooled up good, so i will try tommorow again, and if theres anything else someone could think of im open to suggestions!

Thanks

My friend also happen like this...but after troubleshooting and analysis, the main culprit is the external bec. After used cc bec pro, everything working as it should...can hard 3D until now....