Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Unexpected power gain

Reply

Old 08-07-2011, 04:36 PM
  #1  
freakingfast
Senior Member
Thread Starter
My Feedback: (3)
 
Join Date: Jan 2005
Location: Mather, CA
Posts: 2,222
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Unexpected power gain

I had to do a bearing change on one of my OS 46 VXDF engines. This is a well used engine but just as strong as the day it was broken-in and this is the third change it's going on. This time I went with stainless/polymite retainer rear and steel/polymite front. I purchased them from Boca because they had what I needed for the rear bearing, the others didn't. Like always, the two seals were pulled from the rear bearing. Usually, I then pull one seal off the front bearing, this time I left both on. This is a rear intake engine, so there's no port in the crankshaft. On most engines there is a close running fit between the shaft and the housing to keep the case pressure in. On these engines the fit seem looser, so I opted to keep both seals on the front bearing.

I cant give you a new speed number, but other several guys said it was noticeably faster then before, so it wasn't just my imagination. This is about the twentieth flight on the new bearings.
freakingfast 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