chuckhager
Key Veteran
Location: Clovis, CA
| stanc,
Even though the voltage you run your packs down to is a critical factor, I pay more attention to the mah that I use out of the pack. I try to aim for 75% to 80% mah used. I would fly for five minutes and recharge the pack to see how much I used. Then I fly it again, but this time I fly it for 6 min, recharge, then 7 and so on until I find out how long I can fly and only use 75% to 80% of the total packs mah with my flying style. Everyone has a different flying style, so this time will be different for most, so you will need to figure out what your average time per flight will be.
Doing it this way will increase the number of cycles you can get out of the pack over time. These packs are expensive, and I want them to last a long time. It's the same story when I recharge. I use a balancer and only recharge at 1/2C. The less stress you put on a lipo, the longer it will last.
If you used 3300 mah out of your 4200 mah pack your right in the perfect range. (3300 divided by 4200 = 78%)
Even if you don't use the 75%-80% rule as I do, these larger eHelis will always tell you when you've reached that dangerous low voltage area because your heli will loose power fast. LAND IMMEDIATELY. Lipos are great at maintaining constant power to the end. And then the power drops off like a rock. And even then, you will still find the voltage well above the danger zone. Personally, I don't recommend doing it this way, but some pilots do fly their lipos to the end of the power cycle.
Chuck Hager |
