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Old 01-13-2014, 05:52 PM   #1
KeninAZ
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Default E-Flite Ultra Stick 25e Battery Size?

I crashed this plane no too long ago and it's now been replaced.
Some of my experienced club members said the plane was too heavy and we all know that the battery is biggest weight in the plane. They tell me that a smaller battery will save weight and that it will be able to fly slower if I want to as it's lighter. That all makes sense so far. But I also know that they like smaller and lighter planes or so it seems to me.
I have the Turnigy 32 (recommended optional setup) on the plane and went with the 4s battery recommended by E-Flite. Their recommendation was for a 4s 4200 and I went with a 4s 4000 which was a little lighter but not much.
The plane flying with mild sport activity flew forever, like over 16-18 minutes (and still have some life left) so that more or less tells me for my style of flying that I could cut back on the size of the battery.
And the 4s 4000 mounted with part of the battery hanging off the shelf it was intended to sit on anyway.
Anyway, building a new one shortly and just wondering what battery you might be running with a similar setup.
I am also using Turnigy batteries and in looking at them I see that my 30C battery, the 4000 mah weighs right at 16 oz. I can replace it with a 3000 mah that weighs in at 15.4 oz. but that saves no weight. I also see that I can use a 2650 mah that comes in at 12.5 oz.
I seem to have plenty of flight time with what I have so if I cut back to a 2650 it would probably put me in the ballpark for normal flight times?
Is saving almost 4 oz. on the total weight of a plane that comes in at 3.4 lbs. going to make that much difference in the way it flies? And the last one weighed in right at that 3.4 lbs. weight they say this plane would weigh ready for flight.
It does not seem like it's going to affect things much other than flight time to me?
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Old 01-13-2014, 06:10 PM   #2
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I flew mine on a 3s 4000 mah and a 4s 4000mah. ill check weights when I hit the garage.

slow stock prop reversal. it flies! easily! 543 watt dual motor bipe slow stick. push-me-pull-you. 242 watt 3 channel slow stick. 365 watt mini ultra stick. 415 watt mini contender. 810 watt ultra stick .25e. 220 watt alpha 450 sport (retired).
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Old 01-13-2014, 06:20 PM   #3
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Interesting. You and I selected the same size battery for it with the 4s 4000. Mine is a 30-40C discharge.
I was running an 11 x 7 prop as I only had a 30 amp esc available but I think I may well up that to a 40 amp esc that I have available now for the rebuild.
In testing with an 11 x 7 APC I maxed out with 30.4 amps and right about 500 watts before with the 32.
It seemed to have lots of power even though I did not use much of it.
I had an experienced friend trim it out for me and he loved the plane so much he ran out and bought his own.
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Old 01-13-2014, 06:49 PM   #4
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4S 4400 is the biggest that fits. It can carry this much but it flies much better with less weight. 4S 3300 and the E-Flite Power 32 or equivalent is a good setup.
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Old 01-13-2014, 06:53 PM   #5
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OK, I may just try to find someone with a 2600-3000 that I can try to see how it flies with it.
I only have 4s 4000s and 3s 2200s right now.
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Old 01-13-2014, 08:41 PM   #6
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that was a typo sorry. it was supposed to say 3000mah on 4 cells. I liked this setup much better. I had the 4000mah3 cell I selected for my bi plane slow stick and used it in this for relaxed flying at 350 watts.

slow stock prop reversal. it flies! easily! 543 watt dual motor bipe slow stick. push-me-pull-you. 242 watt 3 channel slow stick. 365 watt mini ultra stick. 415 watt mini contender. 810 watt ultra stick .25e. 220 watt alpha 450 sport (retired).
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Old 01-13-2014, 08:42 PM   #7
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I flew mine with 4s 3000's. Perfect match of duration and weight for me.
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Old 01-13-2014, 08:47 PM   #8
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I agree. I brought mine in at about 15 mins and with all the power, you could putt around at 1/4 throttle for the whole flight.

slow stock prop reversal. it flies! easily! 543 watt dual motor bipe slow stick. push-me-pull-you. 242 watt 3 channel slow stick. 365 watt mini ultra stick. 415 watt mini contender. 810 watt ultra stick .25e. 220 watt alpha 450 sport (retired).
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Old 01-13-2014, 08:55 PM   #9
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TNX for the replies.
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Old 01-13-2014, 09:11 PM   #10
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Hi Here is a Zippy 2800 mah lipo 4 cell at 10.5 oz , 299 grams

http://www.hobbyking.com/hobbyking/s...4S1P_30C_.html

I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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Old 01-13-2014, 09:52 PM   #11
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Glacier 4S 3300's here, I get 8.5 flight times with up to 30% voltage left . occasionally I toss in a 4S 4000 Zippy that I have, but that is very rare.

Too many hobbies, and not enough time!
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