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Main Forum - Helicopter Talk R/C Helicopters and the people who fly them. VENDOR TOPICS DO NOT GO HERE. Full Scale Heli threads go in OT please |
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05-09-2012, 06:01 AM | #1 (permalink) |
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Join Date: May 2011
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How many flights should I be getting out of this RX LIFE Pack?
I use a 3800mah 6.6 LiFe pack on my velo 50 to power my servos and vbar, it is a hyperion pack how many flights should I be getting before having to charge? I notice after a flight or so it will drop to 6.6 and stay there for a bit. Im wondering how many 7:30 minute flights I can have before charging again
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Trex 700L NEO / Mikado Logo 600SX Vbar 6.0/ Trex 470LM NEO, Oxy 2 CC Talon 25 NEO, 450 pro vbar 6.0pro/ Trex 700n DFC OS105HZR, Velocity50 Vbar 6.0pro -Oxy 5 NEO-/Trex 600efl PRO (Night Flyer) vbar/CC HV80 ......ALL VBAR CONTROL |
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05-09-2012, 07:53 AM | #2 (permalink) |
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You really need to fly it 2-3 flights and then see what you put back into the pack. Then....at the end of the day...(if you safely think you have room) fly it 4-5 flights and then put it on a discharger and see what you have left in it. That way you're developing REAL confidence in what your pack will give you and how you and your heli use the power.
Just for starters though.....and don't trust these verify it yourself.....I fly aggressive sport wanna be 3D and I use 115-150 mAh on a Trex 550. A buddy flies very aggressive on a 90 and pulls closer to 300 mAh on a flight. |
05-09-2012, 08:37 AM | #3 (permalink) | |
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Quote:
You cannot depend on a voltage reading on a LiFe pack. Look at the discharge curve for LiFe batteries. They hold their voltage very flat following the initial drop until they are exhausted and then fall off rapidly. Unlike a Lipo, their state of charge cannot be determined by their voltage.
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mSR;T-rex 500 3G, DX7, Futaba 9257, DS510s, 5s w/15 pinon; Pantera w/OS50,Futaba 9452s, Quark/DS650, T-rex 600 w/OS55, 3G; mCPx; Whiplash 90 FBL, AR7200BX, OS105HZ-R, Hatori Pipe, JR8717x3,JR8900G, Fromeco Sahara,Throttle Jockey w/RevGlo |
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05-09-2012, 09:07 AM | #4 (permalink) |
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Join Date: Jan 2010
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+1 to all the above. After monitoring my own 2080mah Hyperion LiFe packs I get 4 flights out of one pack and put back about 1700mah. This is on a 600 size FBL nitro with Futaba cyclicks and a JR tail servo and on board glo igniter.
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Airtronics SD10G, SK540 Synergy N5c, Novarossi .57 3DS MAAC #85462 |
05-10-2012, 01:19 AM | #5 (permalink) |
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Yep, check it out yourself. Different servos pull widely differing amounts of power. My KDS N680 cyclics can suck an 1800 mAh Life pack dry in 4 light sport flights.
I've just changed to Align DS610, but have not flown them yet. I'm hoping that they will use way less power. Fly one or two flights - recharge and work-out how much was used per flight, work-out how many flights you can get applying the 80% rule. Then add a safety margin on top of that. Then do a capacity test on your LiFe pack to verify the claimed capacity and repeat this at least once a year and adjust your number of flights accordingly. I've decided that 3 flights is my limit, so I have 3 main packs, and when they're empty then all the packs get charged. 3 main (parallel) and the LiFe pack on a dedicated charger.
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