Inrunner and outrunner motors?  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> Electric Aircraft Universe >> Electric Training >> Inrunner and outrunner motors?
Page: [1]

Login
Message << Older Topic   Newer Topic >>
Inrunner and outrunner motors? - 4/16/2008 12:43:18 AM   
dandodge


 

Posts: 32
Joined: 3/30/2008
From: Old Hickory, TN, USA
Status: offline 		Ok guys

New to electrics but not RC flying.

What''s the difference between an inrunner motor and an outrunner motor. I''m assuming it has to do with application.

Danny
       Post #: 1

RE: Inrunner and outrunner motors? - 4/16/2008 5:29:11 AM   
jdetray


 

Posts: 1184
Joined: 12/7/2004
From: Napoleon, OH, USA
Status: offline 		The most obvious difference is that in an outrunner, the fixed windings are on the inside, while the outer can holding the magnets rotates around the windings. With an inrunner, the fixed windings are on the outside, while an inner shaft holding the magnets rotates inside the windings.

- Jeff

_____________________________

My other hobby: www.AstronomyBoy.com

(in reply to dandodge)
       Post #: 2

RE: Inrunner and outrunner motors? - 4/16/2008 10:36:00 AM   
whitecrest


 

Posts: 46
Joined: 8/8/2007
From: Orleans, MA, USA
Status: offline
quote:

ORIGINAL: dandodge

Ok guys

New to electrics but not RC flying.

What''''s the difference between an inrunner motor and an outrunner motor. I''''m assuming it has to do with application.

Danny


Also, outrunners generally produce greater torque while spinning more slowly than inrunners. This allows for the use of larger props in applications requiring greater thrust and slower speeds. Inrunners are good for spinning smaller props at higher speeds in applications that require greater speed at the expense of thrust. You have assumed correctly.

_____________________________

Some things that count can''t be counted, and some things that can be counted don''t count. << A.E.

(in reply to dandodge)
       Post #: 3

RE: Inrunner and outrunner motors? - 4/16/2008 1:06:49 PM   
dandodge


 

Posts: 32
Joined: 3/30/2008
From: Old Hickory, TN, USA
Status: offline 		Thanks Guys

(in reply to whitecrest)
       Post #: 4

RE: Inrunner and outrunner motors? - 4/16/2008 5:54:53 PM   
-pkh-



Posts: 2300
Joined: 5/28/2004
From: Emmaus, PA, USA
Status: online
quote:

ORIGINAL: whitecrest
Also, outrunners generally produce greater torque while spinning more slowly than inrunners. This allows for the use of larger props in applications requiring greater thrust and slower speeds. Inrunners are good for spinning smaller props at higher speeds in applications that require greater speed at the expense of thrust. You have assumed correctly.


Because of the torque difference mentioned above, outrunners are typically used to direct drive props, while inrunners are typically used with gearboxes to drive props. Although some inrunners are used to direct drive small props, especially in small, high speed planes.

Direct driving with an outrunner has the advantage of not having a gearbox that can generate noise and suffer mechanical failure. Using an inrunner with a gearbox has the advantage of flexibility, you can choose from a wider range of props, and adjust the gearbox ratio to keep your current draw within the limits of your motor/ESC/battery. With an outrunner, you have a more limited prop selection to keep under your max current limit.

_____________________________

Paul - Helis: Two Raptor 50V2s, Venture 30CP, Blade CX2
Planes: Twist 150, Twist 60, Tribute 36, GP .40 Mustang

(in reply to whitecrest)
       Post #: 5

RE: Inrunner and outrunner motors? - 4/18/2008 1:46:24 AM   
Swift427



Posts: 482
Joined: 3/15/2007
From: Minneapolis, MN, USA
Status: offline 		Which motor (outrunner vs. inrunner) is more efficient = less watts/amps required to power the same direct drive ducted fan.

Is the 5100Kv outrunner a better investment at $63 or the 5100Kv inrunner introductory price of $35. Which one will outlast the other given the same use-care. Please explain.

5100Kv inrunner - http://www.hobby-lobby.com/brushless-eth.htm
5100kv outrunner - http://www.hobby-lobby.com/littlescreamers.htm

_____________________________

Never Give Up, Never Slow Down, Never Grow Old, and Never Ever Die Young

(in reply to -pkh-)
       Post #: 6

Page:   [1]
All Forums >> Electric Aircraft Universe >> Electric Training >> Inrunner and outrunner motors?
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.844RCU1