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| Electronics Discuss radios, chargers, etc... |
Topic Review (Newest First)
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| 02-27-2016 09:37 PM | ||
| RICHARD PAINE |
Re: dedicated battery eflight retracts Just for the record, I was guesstimating on the 25 cycles on my 250ma nimh dedicated battery for the eflight retracts on my new Brian Taylotr plan ME 109. I charged the battery & gave up cycling at 53 cycles, it was still going strong. I think I will stay with the dedicated system. Thanks for the thoughts & opinions |
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| 02-27-2016 11:41 AM | ||
| stegl |
Re: dedicated battery eflight retracts Thanks David. What I figured , likely.... 1C discharge. I think my 60-120 retracts quit when voltage reached about 4.2-4.4 volts and this was with a larger AA pack. What happens at 900 mah max draw; it sucks the voltage down too low and then one or two ( in trike setup) fail to operate . Not a good thing. Those 250 mah 4.8 packs may work well in a micro plane setup with 2 micro servos but would be heavier than The equivalent 1S lipo. |
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| 02-27-2016 11:31 AM | ||
| davidmc36 |
Re: dedicated battery eflight retracts Quote:
http://www.alibaba.com/product-detai...339820358.html But only at 1C...... 
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| 02-27-2016 10:27 AM | ||
| stegl |
Re: dedicated battery eflight retracts Quote:
CC usually state under what conditions their stuff will operate and the cheap stuff just barely give you information. Just curious who makes 250 mah Nicads or Nimh batteries.... pretty small cells. |
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| 02-27-2016 10:24 AM | ||
| stegl |
Re: dedicated battery eflight retracts I was thinking more in the line that at 900 mah overloading the capacity of the 250 mah battery being able to handle the current draw with a nicad or Nimh . Still think it is a mite optimistic, in the air...... He didn't say if he had the gear legs and wheels attached adding to the load. Then there is also the air drag when operated under real conditions. Only that it was operated on the bench. With the stated capacity ; as it is used up the battery voltage will start to drop and that is when the retracts will stop operating even though there may be a remaining charge in the batteries themselves. |
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| 02-27-2016 05:31 AM | ||
| davidmc36 |
Re: dedicated battery eflight retracts Sounds like you will have tons of operating time. At 900ma it should be able to run one gear for 16.6 minutes? Three for 5.5 minutes? Or is the current spec for all three? |
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| 02-26-2016 10:52 PM | ||
| stegl |
Re: dedicated battery eflight retracts So you have cycled the gear 25 times ... in the air... with a 250 mah battery pack and got 25 cycles ? According to the manual operating current is 900 mah and operating voltage 4.8 to 7.4v... |
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| 02-26-2016 08:50 PM | ||
| RICHARD PAINE |
Re: dedicated battery eflight retracts The E-fight retracts I am using are the units designed for the ME 109 with 81 degree travel. #ELFG 509 Also I was not clear on my wiring, The two batteries, [rec & gear] share a common ground. The signal wire & ground wire from the receiver for the retracts go to the retracts. A separate 4.8 batt with switch is spliced into the lead. As mentioned, it all works on the bench. The extra battery weight is not a issue {250 ma nimh] & can cycle the gear 25 times plus, Warbirds usually need nose weight anyway. |
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| 02-26-2016 10:35 AM | ||
| Cougar429 |
Re: dedicated battery eflight retracts Quote:
Most BEC's are "Power Limited", including both CC units. As the input voltage increases the output current drops. Just something to consider. A couple others are ratings for extensions and any other connectors or switches in the system. |
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| 02-26-2016 10:08 AM | ||
| stegl |
Re: dedicated battery eflight retracts Quote:
In any case the Eflites are quite low power drain in comparison. |
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