Genettico

hey guys:

How can you estimate battery running time on a boat based on parameters like:
- prop size
- Battery voltage (mah)
- motor Kv

ryan_t888

You can't, you're missing parameters such as:

- Prop Pitch
- Prop Type
- Hull Type
- Hull Size
- Hull Weight
- Motor Size
- Cell Type
- Cell Count
- Cell Capacity
- Cell "C" Rating / Discharge rate
- Water Conditions
- Ride Attitude

Any one of these variables can greatly reduce run time.

Ryan

headhunter23

It's easier to just to grab battery and run the way you run and time it. Then do a little division and you can get an estimate of run times per 1000mah or 1 amp. For my old hammer before I converted it to brushless I ran 2000mah nimh packs, they averaged 10-12 min runs, so boat was pulling 1000mah per 5-6 min. With the new lipo's and brushless, no idea as I don't yet have adequate cooling to get accurate readings.

You could also stick in one of these between the battery and the esc, this will tell you exactly how much mah you use in a run. I just picked up one and it works amazing.

http://www.unitedhobbies.com/UNITEDH...idProduct=6380

Ivan.