Prop down?

I have a sea duck and a P 38 I would like to use 4 cell I have the stock props that came in the c pack what do I need to prop down to to use a 4 cell or can I use the props that came with it?
 

tamuct01

Well-known member
I think the default prop for the 3 cell setup of the C pack is a 9x6 or 10x4.7. I run my Guinea Pig on 4S with 8x6 props and it runs great.
 

Corsair714

Well-known member
I'd need a radar gun to know for sure, but in my experience 8x6 visually looks like it's going faster than an 9x4.5. I have used both on my simple scout.