How to pre-calculate e-foil ride times? (Voltage, Motor, KV, Prop combos)

Build, Repair & Mod
#1

Good day everyone!

1st post and to this whole DYI e-foil thing

I’ve read a lot in this forum but can someone explain (demystify) a way to get a rough calculation to estimate e-foil ride times when on foil between various battery / motor size and KV / prop options out there?

There are so many options, tring to sort out which would be the optimal runtime vs weight vs power for an efoil project…

  • Which Voltage? 14S10P or 16S10P or 18S10P
  • What size motor?
  • What motor KV?
  • Propeller size and pitch based off the motor size / kv and voltage

Foil size would be based off weight but 1200cm foil for under 175lbs and 1500cm for 175-225lbs.

Any info would be greatly appreciated.

Thank you, Koa

#2

Not an expert,

For batteries, if you want long run time go as big as you can. The extra weight won’t have much of an impact on range. Also recommend 14s as voltages above are getting a little scary with salt water.

For max run time, slower the better, so a big efficient foil.

For max range, it’s a bit tricker finding the right balance between drag and lift and speed. I’m not sure if you can calculate that easily.

#3

@Strongarm

You said “ Also recommend 14s as voltages above are getting a little scary with salt water.”

I’m not disputing your point about 14s being scary but I wouldn’t limit that to salt water. Actually more people are injured or worse in fresh water