Motors - WattFlyer RC Electric Flight Forums - Discuss radio control eflight

General Electric Discussions Talk about topics related to e-powered RC flying

Motors

Old 08-06-2006, 06:55 PM
  #1  
Richard Parkes
Member
Thread Starter
 
Join Date: May 2006
Location: Isle of Wight, UK
Posts: 55
Default Motors

I have been running two Komodo KH2407-16 brushless motors. They produce a wonderful 105W and 24oz thrust with a 3 cell and a 9 x 4.5 prop. With 10A max Im getting great flight times from a 1100maH LiPo.

They have a 3.2mm shaft that the manufacturere calls hardened. However, even with a prop touch on a grass field when the wheels dip into a hole I have been getting bent shafts. I reckion to replace a shaft every 2nd time I go flying. Ive suggested to Komodo that they make a strionger shaft.

Does anyone have experience of this motor, or similar shaft bending problems ?
Richard Parkes is offline  
Old 08-06-2006, 07:27 PM
  #2  
randey
New Member
 
Join Date: Dec 2005
Location: Hot Springs Village AR
Posts: 2
Default

Get a prop saver held on with rubber O ring
randey is offline  
Old 08-06-2006, 07:48 PM
  #3  
Solid Hit
Just call me ... Bill
 
Solid Hit's Avatar
 
Join Date: Mar 2006
Location: Upstate of SC
Posts: 1,186
Default

I agree 100% with randey.

When I fly at home, I have a problem with rough ground. The prop saver has saved me a bundle on wrecked shafts and props. Instead of "0" rings, I use the tiny rubberbands that girls use for their hair. 2 of them works on a prop work great and they will give when your prop hits the ground
Solid Hit is offline  
Old 08-06-2006, 11:17 PM
  #4  
Richard Parkes
Member
Thread Starter
 
Join Date: May 2006
Location: Isle of Wight, UK
Posts: 55
Default Bent shafts

Ive seen 100Watts quoted on thsi site as a cut off for using Prop savers - is this real ?

However my problem isnt broken props they last just fine, I have not boken one yet, its bent shafts in the motor.

Richard
Richard Parkes is offline  
Old 08-06-2006, 11:49 PM
  #5  
B.L.E.
multi-hundredaire
 
Join Date: Jul 2006
Location: Southern shore of Lake Travis, TX
Posts: 157
Default

Originally Posted by Richard Parkes View Post
Ive seen 100Watts quoted on thsi site as a cut off for using Prop savers - is this real ?

However my problem isnt broken props they last just fine, I have not boken one yet, its bent shafts in the motor.

Richard
"Prop saver" is kind of a misnomer, they are really "shaft savers".
B.L.E. is offline  
Old 08-07-2006, 02:59 AM
  #6  
Solid Hit
Just call me ... Bill
 
Solid Hit's Avatar
 
Join Date: Mar 2006
Location: Upstate of SC
Posts: 1,186
Default

I'm using a prop saver on an UltraFly B/06 rated at 150+ watts with no problems
Solid Hit is offline  
Old 08-07-2006, 03:01 AM
  #7  
Solid Hit
Just call me ... Bill
 
Solid Hit's Avatar
 
Join Date: Mar 2006
Location: Upstate of SC
Posts: 1,186
Default

I'm using a prop saver on an UltraFly B/06 rated at 150+ watts with no problems flying my Mini Ultra Stick.
Solid Hit is offline  
Old 08-07-2006, 08:13 PM
  #8  
Richard Parkes
Member
Thread Starter
 
Join Date: May 2006
Location: Isle of Wight, UK
Posts: 55
Default

Do you use the standard approach of an O ring and a prop saver at this power level, or do use another technique ?

My particular setup is fitted with a 9 x 4.5 spinning at 8040 rpm and 24.9 noz thrust at full power.
Richard Parkes is offline  
Old 08-10-2006, 08:10 PM
  #9  
Solid Hit
Just call me ... Bill
 
Solid Hit's Avatar
 
Join Date: Mar 2006
Location: Upstate of SC
Posts: 1,186
Default

Originally Posted by Richard Parkes View Post
Do you use the standard approach of an O ring and a prop saver at this power level, or do use another technique ?

My particular setup is fitted with a 9 x 4.5 spinning at 8040 rpm and 24.9 noz thrust at full power.
I'm using an APC 9x6 on my B/06 and it turns at about 7400 rpm. I don't know the thrust. I don't have any more "0" rings so I'm using rubberbands.
Solid Hit is offline  
Old 08-10-2006, 08:17 PM
  #10  
Rugar
FAA# OUTLAW!
 
Rugar's Avatar
 
Join Date: Jul 2005
Location: San Bernardino, Ca. USA
Posts: 2,621
Default

Originally Posted by Solid Hit View Post
I'm using an APC 9x6 on my B/06 and it turns at about 7400 rpm. I don't know the thrust. I don't have any more "0" rings so I'm using rubberbands.
You can get "0" rings at your local Hardware store. Ive read of some guys going to a Medical Supply store and getting some surgical tubing and then cutting out their own "0" rings from it. I think they were using 3/8 tubing if I remember correctly.
Rugar is offline  
Old 08-10-2006, 08:57 PM
  #11  
Solid Hit
Just call me ... Bill
 
Solid Hit's Avatar
 
Join Date: Mar 2006
Location: Upstate of SC
Posts: 1,186
Smile

Originally Posted by Rugar View Post
You can get "0" rings at your local Hardware store. Ive read of some guys going to a Medical Supply store and getting some surgical tubing and then cutting out their own "0" rings from it. I think they were using 3/8 tubing if I remember correctly.
.... but these little rubber bands that my daughter uses are just the right size and cost about $1.00 for somewhere around a million of them. I use two per prop and change them at the start of each flying session. That way I don't worry about nicked or stretched "0" rings. (And they come in nice colors).
Solid Hit is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Lancifer
Brushless Motor Construction
9
07-26-2008 04:57 PM
Jollyroger
Motors and Speed Controllers for sale & WTB
14
08-10-2007 03:23 PM
adamdb
Power Systems
3
07-14-2007 08:43 AM
re3626
Motors and Speed Controllers for sale & WTB
0
04-23-2006 12:39 AM
ms08
General Electric Discussions
5
03-22-2006 07:56 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Quick Reply: Motors


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

Page generated in 0.12707 seconds with 13 queries