I don't seem to have enough torque to start the motors spinning

[treadmill]

Sort of what it says in the title. I'm doing a Li-Ion 2S build with 2650kv 1505 motors coming off of a Verygood RC F7 40A AIO. Everything seems to work right, motors are spinning the right direction, whole nine yards, but when I mounted the props and armed, nothing would spin. That is, nothing would spin unless I gave each prop a flick, then they'd come up to idle.

Do I need to add a cell to increase current or could my garbage solder work be causing problems on all four corners? I'm using decent Sony VTC6 30A 18650s that just came off the charger and I'm showing a clean 8V in betaflight with everything spinning at idle (I know, I know, shouldn't be plugged into a computer with props mounted).

Thanks for the help!
-treadmill

 

[holtneil]

Hi I would say up the battery the motors are rated for 4 to 6 cell so a 2 cell is not going to get it flying

 

[treadmill]

Appreciate the reply - if I wanted to swap motors instead of adding more batteries, do you have a recommendation for specific motors or general specs that'll do the job with 2S power?

 

[Dugdog47]

You could try to increase the min throttle in betaflight

 

[holtneil]

Sorry it will just be looking for a motor to run on 2cell , but first try what dugdog47 said and up the throttle , but you may still find if it takes off there will not be enough power to recovery a dive from the quad
When I was running a 450 quad with 1200kv motors I had the power to recover but the plastic blades flexed to much so had to fit carbon blades