O.S. Engines Support Ask Bill Baxter your questions about O.S. Engines.

OS 55AX Noisy

Reply
Old 04-21-2012, 05:38 PM
  #1
dgerhard
Thread Starter
 
Join Date: Jun 2009
Location: West Farmington, OH
Posts: 46
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default OS 55AX Noisy

When flying aroud half to quarter throttle i get a noise that sounds like lots of knocks. Some guys say it sounds as if it detonating but the noise is normal. from another post i read was wondering if the same applied http://www.rcuniverse.com/forum/fb.asp?m=9831530
dgerhard is offline  
Reply With Quote
Old 04-23-2012, 06:05 AM
  #2
Bax
 
Join Date: Apr 2002
Location: Monticello, IL
Posts: 19,479
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS 55AX Noisy

The LA-series of engines do not have crankshafts supported by ball bearings. The AX-series of engines, do. You cannot get noise from the same source. The crank of an AX-series engine should not move around. If it does, then the bearings could be bad. Usually, though, in mid-to-low throttle settings, you get additional exhaust noise caused by unburned fuel exiting the engine and burning in the exhaust port and/or muffler. It will vary, depending upon the exhaust system, fuel used, and propeller. It's common on larger engines, but not unheard of with engines as small as the .55.
Bax 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 11:08 AM.