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All Forums >> Electric Aircraft Universe >> Brushed/Brushless motors, speed controls, gear drives >> what is 280 size motor
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what is 280 size motor - 12/19/2012 12:56 AM   
lionstalker


 

Posts: 5
Score: 100
Joined: 6/6/2012
Last Login: 4/30/2013
From: alturas, CA, USA
Status: offline 		I would apreciate some help here.  Kit calls for a 280 size brushed motor with gear reduction. What does 280 stand for? Do I need a gear reduction for a brushless motor? I'm trying to save time and money to modernize the kit to brushless motor. HELP PLEASE.


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RE: what is 280 size motor - 12/20/2012 8:07 PM   
Dr Kiwi


 

Posts: 2089
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Joined: 12/4/2002
Last Login: 5/24/2013
From: Chattanooga, TN, USA
Status: offline 		A bog-standard Speed 280 is probably good for no more than 3A-4A.. maybe 40W-50W at the outside... geared it might spin an 8" prop...FIRST decide what size prop your plane will need, then choose a brushless outrunner with the right Kv to spin that size prop at ~50W...about 4A-5A on 3s, or 6A-7A on 2s.

On 2s a 19g Suppo 2204/14 (~1570Kv) spins an 8x4 GWS HD to get you 310g @ 29mph from 5.90A/44W.

On 3s an 18g Motrolfly 2203-1600v2 (~1645Kv) spins a 7x3.5 GWS HD to get you 326g @ 38mph from 5.40A/59W

_____________________________

Dr Phil Millener, Chattanooga, TN

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RE: what is 280 size motor - 12/21/2012 7:02 PM   
lionstalker


 

Posts: 5
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Joined: 6/6/2012
Last Login: 4/30/2013
From: alturas, CA, USA
Status: offline 		Thank you. That is just the info I was looking for. A good day to you.


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All Forums >> Electric Aircraft Universe >> Brushed/Brushless motors, speed controls, gear drives >> what is 280 size motor
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