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« on: April 26, 2011, 06:47:37 PM »
paladugu_sujith
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always UP in THE air.!!

hi

i am using this combination on my piper j3

motor

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=15185

ESC

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=2168


i use my 1300mah 20C 11.1 lipo battery with it.. but it discharged in mere 3 minutes.. do u hve to use a 4 cell batt for this.. kindly suggest


regards
sujith
 
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« Reply #1 on: April 26, 2011, 07:06:47 PM »
harsha
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you can use more "MAH" battery
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« Reply #2 on: April 26, 2011, 07:09:05 PM »
harsha
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or u can also use 1300mah with more C rating for more flight time
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« Reply #3 on: April 26, 2011, 07:11:22 PM »
iamahuman
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A higher C rating won't increase flight time.Get a battery with more capacity.But a heavier battery will affect your CG.
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"Chuck Norris once overcharged a lipo. Thank him for the Sun."

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« Reply #4 on: April 26, 2011, 07:16:43 PM »
harsha
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Quote from: iamahuman on April 26, 2011, 07:11:22 PM
A higher C rating won't increase flight time.Get a battery with more capacity.But a heavier battery will affect your CG.
bro then how to increase the flight time?Huh?
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« Reply #5 on: April 26, 2011, 07:20:10 PM »
iamahuman
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A battery with more capacity.Or a more efficient power system.Many ways.Most common is increase in capacity.
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"Chuck Norris once overcharged a lipo. Thank him for the Sun."

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« Reply #6 on: April 26, 2011, 07:24:52 PM »
harsha
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ok thanq bro!!!
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« Reply #7 on: April 26, 2011, 07:50:36 PM »
rajathv8
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The ONLY way to increase duration is MAH. C decides the max current you can pull out. The more you pull out the lesser the duration for wich it will last. 3s, 4s etc decides the terminal voltage- this can also increase capacity but it adds weight.

1000mah 20c 2s – 7.4v can drive a 74w (7.4v X 10A) motor for 1/10th of an hour.
1000mah 20c 3s – 11.1v can drive 111w (11.1v X 10A) motor for 1/10th of an hour.
So using 1000mah 3s on 74w motor will last longer than a 2s for a given RPM.
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« Reply #8 on: April 26, 2011, 08:01:02 PM »
Samanth
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Every Flight is a test & every Crash is a Lesson.
what are the specs of your piper cub ? and what prop. size do you use on it ? because I dont think using an Inrunner Brushless motor for a piper cub would work out well...
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« Reply #9 on: April 26, 2011, 08:28:16 PM »
paladugu_sujith
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always UP in THE air.!!
ok here u go..

Wingspan: 955mm (37.5 inch)
Length: 730mm (29 inch)
Flying Weight: 460g (18 oz)

i use an inrunner setup with 8 X 6 prop..

i used a 1800 mah 25-35 C turnigy lipo but the CG was a big problem.. so.. wanted to go with native 1300 lipo..
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« Reply #10 on: April 26, 2011, 08:32:35 PM »
Divyam
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Just get more batteries! Get like 3-4 batteries and swap them out at the field! Just buy a few more 1300 MaH batteries!
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« Reply #11 on: April 26, 2011, 10:14:56 PM »
akky
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I am not weird...Instead i am a bit different....
first of all use an outrunner a simple emax fc 2822 will do the job with a 20 amp esc and 8043 prop you will get atleast 13 mins of flight time with 1300 mah lipo
...I the wrong motor you have chosen for it thats y you are not getting flight time
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Arcarious @ Akky.....
I have never crashed while flying....Its the Landing only that gets me....
Happy Landings....&.....Happy Crashings
 

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« Reply #12 on: April 26, 2011, 10:17:47 PM »
akky
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I am not weird...Instead i am a bit different....
The most funniest part is you are using a car in-runner on a scale plane  Giggle Giggle Giggle Shocked Shocked Shocked
Just want to ask who suggested you to go for this motor

just look at the prop u used
and the KV rating
3200KV  Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked Shocked
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Arcarious @ Akky.....
I have never crashed while flying....Its the Landing only that gets me....
Happy Landings....&.....Happy Crashings
 

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« Reply #13 on: April 26, 2011, 10:37:40 PM »
paladugu_sujith
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always UP in THE air.!!
i wanted a combination of 18 amp setup .. never checked the specifications..lol..
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« Reply #14 on: April 27, 2011, 09:53:19 AM »
paladugu_sujith
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always UP in THE air.!!
ok

i hve a new motor now

http://www.rcdhamaka.com/index.php?main_page=product_info&cPath=100_93&products_id=273&zenid=45r7122riggm1sgu5ktkmgokp6

with ESC

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=2168

LIPO

20C 1300mah 11.1 3 cell


this should be OK right??
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« Reply #15 on: April 27, 2011, 10:06:45 AM »
spitfire
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That will depend on propeller size.
Here is a link that will help you in propeller selection for this motor.

http://www.headsuprc.com/servlet/the-1529/EMAX-CF2812-Outrunner-Brushless/Detail

BTW go through RC India Gems http://www.rcindia.org/rc-india-forum/the-rc-india-gems/. There is lot motor information a basics about setup covered there so that you will be able to choose setup on your own.
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« Reply #16 on: April 27, 2011, 10:17:08 AM »
akky
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I am not weird...Instead i am a bit different....
yes it will be ok go for it u will get a good flight time this time go for 8043 prop
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Arcarious @ Akky.....
I have never crashed while flying....Its the Landing only that gets me....
Happy Landings....&.....Happy Crashings
 

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« Reply #17 on: April 27, 2011, 10:33:51 AM »
paladugu_sujith
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always UP in THE air.!!
yo..

thnks akky.

will try my luck

regards
sujith
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