Questions and Answers If you have general RC questions or answers discuss it here.

OS 120ax fuel tube

Reply

Old 04-28-2008, 02:39 PM
  #1  
fallingleaf
Senior Member
Thread Starter
My Feedback: (1)
 
fallingleaf's Avatar
 
Join Date: Apr 2008
Location: Auckland, NEW ZEALAND
Posts: 377
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default OS 120ax fuel tube

Hi all. just wondering from those out there with the 120 what sized fuel tubing you are using? Manual says approximately 2.5mm inner diameter tubing but I can find an exact match. The closest is 3/32 tubing however that comes in at 2.3mm in diameter.

What does everyone reccomed for this sized engine? Putting it in a goldberg ultimate bipe. Cheers!
fallingleaf is offline  
Reply With Quote
Old 04-28-2008, 05:47 PM
  #2  
kwhite.6
Senior Member
 
Join Date: Jan 2005
Location: windsor, NC
Posts: 190
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS 120ax fuel tube

I've been using 3/32 for over a year now and it works fine.this engine uses the same amount of fuel as my 61, so larger tubing is not needed.
kwhite.6 is offline  
Reply With Quote
Old 04-28-2008, 06:40 PM
  #3  
fallingleaf
Senior Member
Thread Starter
My Feedback: (1)
 
fallingleaf's Avatar
 
Join Date: Apr 2008
Location: Auckland, NEW ZEALAND
Posts: 377
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS 120ax fuel tube

Great in that case I am sorted as I have a TONNE of greatplanes 3/32 tubing! How is this engine without a pump is the fuel tank is up front? I have heard it generates quite good fuel draw without a pump. Planning on using a 10oz tank with it (plenty of space up front in the ultimate for a bigger tank). Just curious about the pump in terms of if the plane ends up a lil nose heavy and have to move the tank back a wee bit!
fallingleaf is offline  
Reply With Quote
Old 04-29-2008, 06:14 AM
  #4  
Flying freak
Senior Member
 
Join Date: Jun 2006
Location: granby, QC, CANADA
Posts: 1,407
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS 120ax fuel tube


ORIGINAL: fallingleaf

Great in that case I am sorted as I have a TONNE of greatplanes 3/32 tubing! How is this engine without a pump is the fuel tank is up front? I have heard it generates quite good fuel draw without a pump. Planning on using a 10oz tank with it (plenty of space up front in the ultimate for a bigger tank). Just curious about the pump in terms of if the plane ends up a lil nose heavy and have to move the tank back a wee bit!

don't forget to balance with the tank empty! an empty tank will make lil to do difference in cg.... (if moved only by an inch or too..)

Steven
Flying freak is offline  
Reply With Quote
Old 04-29-2008, 06:29 AM
  #5  
Zippi
Senior Member
My Feedback: (10)
 
Zippi's Avatar
 
Join Date: Jun 2004
Location: Evansville, IN
Posts: 4,970
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS 120ax fuel tube

I'm running two of the OS 120AX engine and I use the 3/32" ID fuel line with no problem. These engines are great on fuel with a lot of HP swinging an APC 17X6 prop.
Zippi is offline  
Reply With Quote
Old 04-29-2008, 06:10 PM
  #6  
fallingleaf
Senior Member
Thread Starter
My Feedback: (1)
 
fallingleaf's Avatar
 
Join Date: Apr 2008
Location: Auckland, NEW ZEALAND
Posts: 377
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS 120ax fuel tube

Great. Are the pitts mufflers (bisson etc) good with this engine or is it better to use the powerbox muffler. I have a feeling that the powerbox won't fit under the ultimate cowel so might get the pitts one as it is far slimmer. is the engine still as reliable with a pitts in terms of back pressure, fuel draw etc?
fallingleaf is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service