RCU Forums - View Single Post - K&B .65 Sportster
View Single Post
Old 12-02-2007, 01:52 PM
  #29  
NM2K
Senior Member
My Feedback: (14)
 
Join Date: Jan 2002
Location: Ringgold, GA
Posts: 11,488
Likes: 0
Received 2 Likes on 2 Posts
Default RE: K&B .65 Sportster


ORIGINAL: bigdaddy

Fine aluminum particles released during break-in process kills the plug element. See D.B. Mathews comments in 5/2000 Flying for Fun pg 79 5/2000 issue of Model Aviation.
He suggests breaking in the engine with the plug removed, lots of oil, and turning the engine at 1,000rpm for 30 minutes via a lathe. Cheers bigdaddy

-------------


This used to be a hot subject of debate in the model mags, many, many years ago.

The conclusion back then was that you could not obtain the same effect from spinning an engine backwards or forwards as you could from running the engine. The connecting rods of engines spun by electric motor were "worn in" in a useless direction since no pressure from the piston was applied to the connecting rod.

My .28's received about an hours worth of running each on the bench, but were still breaking-in in the air for quite a while after their first flights. I'm convinced that using fuel with all castor lube would have sped things up considerably, but this is only a hypothesis.


Ed Cregger