Tips & Techniques Want to share a tip or special technique you have either in the workshop or at the flying field or race track? Post it right here!

5 mm strut pin alternative

Reply
Old 09-01-2012, 10:37 AM
  #1
Weasel Keeper
Thread Starter
 
Weasel Keeper's Avatar
 
Join Date: Dec 2004
Location: Orlando, FL
Posts: 176
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 5 mm strut pin alternative

I had a little trouble finding 5 mm stock from which to make strut pins that will fit some of the Chinese struts and retracts and found a simple alternative some may find useful. Turns out that electric motors used in .40 size airplanes use a 5 mm shaft that is replaceable. These shafts appear to be hardened steel and even have flats already filed into them. You can find them for as little as a couple dollars. Hope this is helpful to somebody.
Weasel Keeper is offline  
Reply With Quote
Old 09-02-2012, 07:29 AM
  #2
frets24
 
frets24's Avatar
 
Join Date: Dec 2007
Location: charlotte, NC
Posts: 1,242
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 5 mm strut pin alternative

Link or pic?
frets24 is offline  
Reply With Quote
Old 09-02-2012, 08:05 PM
  #3
Weasel Keeper
Thread Starter
 
Weasel Keeper's Avatar
 
Join Date: Dec 2004
Location: Orlando, FL
Posts: 176
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 5 mm strut pin alternative

[link=http://www.hobbypeople.net/index.php/hobby-people-retracts-electric-10lbs-no-hdwr-pr.html]Electric Retract[/link]

[link=http://shop.rcskylite.com/products/40%252d120-Class-Offset-Oleo-Struts-for-P47-Thunderbolt.html]Aluminum Struts[/link]

[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXSDS1&P=Z]5mm motor shaft[/link]

Weasel Keeper is offline  
Reply With Quote
Old 09-03-2012, 06:14 AM
  #4
frets24
 
frets24's Avatar
 
Join Date: Dec 2007
Location: charlotte, NC
Posts: 1,242
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 5 mm strut pin alternative

Thanks Weasle Kpr.

Here is a link to the same retract at a much, much lower price. $8. I'm using several of these on mains and they have a smaller size available that works great as a tailwheel retract with just some minor tweaks to get a steerable TW. There is also a steerable nose wheel version of the larger one that works as a TW on larger planes.

Great tip on the strut pin. I had tried using the smooth part of drill bits but they tend to shatter before too long.

I have also used a bunch of the RCSkylite struts and the pin that comes with them is short and soft. The struts themselves have been excellent and the price is great.


http://www.hobbyking.com/hobbyking/s...dproduct=14838
frets24 is offline  
Reply With Quote
Old 09-03-2012, 06:59 AM
  #5
Weasel Keeper
Thread Starter
 
Weasel Keeper's Avatar
 
Join Date: Dec 2004
Location: Orlando, FL
Posts: 176
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 5 mm strut pin alternative

It's amazing sometimes that the thing i need is in the hobby shop, just in need of a little re-purpose thinking. Another thing you may be interested in is that the c-clip groove can be used to retain the pin in a retract to make it steerable.
Weasel Keeper is offline  
Reply With Quote
Old 09-05-2012, 08:41 AM
  #6
Weasel Keeper
Thread Starter
 
Weasel Keeper's Avatar
 
Join Date: Dec 2004
Location: Orlando, FL
Posts: 176
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 5 mm strut pin alternative

Frets,

Do the HK version of the retract have a metal trunnion?
Weasel Keeper is offline  
Reply With Quote
Old 09-05-2012, 02:15 PM
  #7
YAT-28E
 
YAT-28E's Avatar
 
Join Date: Apr 2003
Location: Columbus, OH
Posts: 492
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 5 mm strut pin alternative

weasel,

How long is that 5mm shaft??
YAT-28E is offline  
Reply With Quote
Old 09-05-2012, 02:54 PM
  #8
Weasel Keeper
Thread Starter
 
Weasel Keeper's Avatar
 
Join Date: Dec 2004
Location: Orlando, FL
Posts: 176
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 5 mm strut pin alternative

I don't know about that particular one, but they come in many lengths. That link was just a ready example. The shafts I used were another brand that I found at the LHS and they ranged in length from around 2 1/2 to 5 inches. Tower is usually pretty good about including dimensions, but not in this case. Don't feel limited to the RimFire brand. There are lots of motors out there and all seem to have replacement shafts available.
Weasel Keeper is offline  
Reply With Quote
Old 09-14-2012, 12:01 AM
  #9
frets24
 
frets24's Avatar
 
Join Date: Dec 2007
Location: charlotte, NC
Posts: 1,242
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 5 mm strut pin alternative


Quote:
ORIGINAL: Weasel Keeper

Frets,

Do the HK version of the retract have a metal trunnion?

No, it's a composite trunion with a brass pivot block molded in. The set screws go through the brass. I have them on a couple of planes and they've worked well.
frets24 is offline  
Reply With Quote
Old 09-28-2012, 05:27 PM
  #10
full rudder
 
full rudder's Avatar
 
Join Date: Oct 2007
Location: north of Montreal, QC, CANADA
Posts: 53
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 5 mm strut pin alternative

Ask any of the electric 450 size heli guys for bent main rotor shafts, they are 5mm and cut em down to the size you need with a dremel cutoff wheel!
full rudder is offline  
Reply With Quote
Old 09-30-2012, 02:59 PM
  #11
YAT-28E
 
YAT-28E's Avatar
 
Join Date: Apr 2003
Location: Columbus, OH
Posts: 492
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 5 mm strut pin alternative

e flite and Top Flite wire gears are 5mm if that helps tha way you can cut a couple pieces form 1
YAT-28E is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

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



All times are GMT -8. The time now is 05:53 AM.