How to decide on headspeed: KV of the motor, and pinion tooth count. I have additional information for calculating headspeed RPM, but it goes deeper than before and considers motor RPM first. There are few who delicately calculate the both motor RPM and headspeed RPM for optimal flight time and power combination. Those two factors [...]
Archive for the ‘Battery’ Category
New E-Calculator Formula
Posted: September 21, 2011 in Battery, Governor, Heli, Lessons Learned, RPM, Setup0
This is the the formula that has worked well for me. I recommend any electric pilot to follow this process for optimal performance and flight time too. :-) MainGear / Pinion = GearRatio 3.7 x (cell count) = NominalVoltage NominalVoltage * KV = MotorRPM MotorRPM / GearRatio = MaxHeadSpeed _________________________________________ MaxHeadSpeed - HeadSpeed = HeadRoom (HeadRoom [...]
I received my Extra300 and got it from the box to the air in about 2 hours. I temporarily stole the Futaba receiver from my helicopter, but can easily re-install it with velcro and connect the s.bus wire and I’m back to the heli again. My new Extra 300 flew like an absolute dream. Super smooth take [...]
I have the iCharger 3010b and it works very well on a 24v 60A DC power supply. But I recently learned of a mistake I was doing that was unsafe and not optimally charging my lipo batteries – using Fast Charge mode that does not balance the cells. Instead what you should do is set [...]
I have a friend who helped me see the cost over time of an electric helicopter vs a nitro helicopter. Here are general numbers for fuel cost comparisons alone on a 90 size heli excluding tax and shipping: Nitro: $30 for 1 gallon of 30% fuel 7 flights = $4.30 per flight ** not including the [...]
After I spent all that time saturating my lipo cells at 1A I found it made no difference in subsequent flights. Oh well. :)
I currently fly two lipo 6s packs in series to make a 12s connection, but I charge them both in parallel. This method only applies to lipo batteries! By charging lipo batteries in parallel allows any charger that can charge 6s batteries. All the batteries connected are seen as a single 6s pack regarding voltage, [...]
An attempt to restore an old, used, and abused set of 6s ThunderPower 6s 5000mAh 45 packs.
