Problem with a bogging motor
 

I just finish working on my T-rex V2. Everything seems to be set up properly. The heli hovers pretty good for a few seconds and then suddenly the mptor starts to bog down. I am using the stock motor (with 12T pinion) and ESC that came with the heli. I power it up with a 22C pack lipo. I even tried it on different lipo with same results. I also tried to put the same Align ESC (as the stock) also the same results. I couldn't find the problem. It seems I am out of options. Needing some help to figure it out.

RE: Problem with a bogging motor
 

you might either have too much pinion (try a 10t or 11t) or you might have too much pitch on the blades at a low rpm. since the pitch is easier to change try lowering the pitch curve to see if that helps.

RE: Problem with a bogging motor
 

You mention the max discharge rate of the battery, 22C, but you do not mention the capacity or the brand. Both are relevant pieces of info.

RE: Problem with a bogging motor
 

Sorry. I am using the 11.1v Align lipo with 2100mAh 22c.

RE: Problem with a bogging motor
 

What pitch are you running? If you follow Finless Bob's recommendation, a 5 point pitch curve in normal mode works out to be 40,45,50,75,100. This works perfect for me, about -2 degrees at 0 throttle and +11 degrees at 100% throttle.

If it is not a pitch problem and you have tried (2) good Lipo packs, I guess it could be a defective ESC or motor. Do you have a spare to try?

RE: Problem with a bogging motor
 

give that a shot, also unplug the motor and check your pitch, when i was learning to hover i used -2 and +8. Also, see if theres any binding in the head, give it full throttle and spin with your hand, see if its still easy to do.

RE: Problem with a bogging motor
 

All my set ups are base on Finless Bob's video. I also tried switching with my spare ESC still the same thing happens. Right now I am in the process of using the stock ESC and an Align motor which is the 3500kv with 12T pinion. I'll see what happens next.

RE: Problem with a bogging motor
 

Well after using different motor, ESC and pinions still the same results. The heli will hover for a few seconds and starts to bog down. Still needing help. Thank you.

RE: Problem with a bogging motor
 

what pitch?

you have not addressed that
Which pitch gauge are you using?

RE: Problem with a bogging motor
 

Maybe could be someting binding.Belt to tight ,Pinion to tight to the main gear.Everything should spin free .

RE: Problem with a bogging motor
 

If you are asking pitch values. I am using the once Finless Bobs recommends on his video. I am using the align pitcg gauge.

RE: Problem with a bogging motor
 

do you have someone local that can look at it?

RE: Problem with a bogging motor
 

No. I don't know anybody around here who flies heli. I've been doing these all by myself. Infact I got 3 other T-rex that I built but nothing like this happen to me before.

RE: Problem with a bogging motor
 

Go take a look at the [link=http://www.modelaircraft.org/clubsearch.aspx]AMA club search page[/link]. There are 16 clubs within 25 miles of zip code 60077. I bet that some of those clubs have some of the members who fly helis.