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

OS46 FX - rebuilt?

Reply

Old 02-04-2008, 09:14 AM
  #1  
nexxa
Senior Member
Thread Starter
 
Join Date: Nov 2004
Location: Montreal, QC, CANADA
Posts: 165
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default OS46 FX - rebuilt?

My old OS.46 isn't screaming like before. After 2 years in my Viper500 with APC 9X7 with Ultratrust muffler. This engine is lying in a drawer now and the airplane in a garbage!. If I want to make it scream like before what I need to change?

Bearings and sleeve
Bearings, sleeve and piston
Bearings, sleeve, piston and connection rod

With time the engine lost some compression. When it's cold, it harder to start. It take maybe 30 secondes (need to wait until is hot) before it run and idle ok. Don't know the RPM, but I lost a maybe 2000 or 3000 rpm easely comparing 2 years ago.

Thanks
nexxa is offline  
Reply With Quote
Old 02-04-2008, 09:26 AM
  #2  
daven
Senior Member
My Feedback: (1)
 
Join Date: Dec 2001
Location: Waseca, MN
Posts: 8,455
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS46 FX - rebuilt?

Does it need bearings? Does the prop turn smoothly, or is it gritty?

It may only need a piston and sleeve, but at the cost of those replacement parts, you may want to consider a new engine.
daven is offline  
Reply With Quote
Old 02-04-2008, 10:20 AM
  #3  
Mike Connor
Senior Member
My Feedback: (5)
 
Mike Connor's Avatar
 
Join Date: Jan 2002
Location: Tulsa, OK
Posts: 2,025
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS46 FX - rebuilt?

Sounds like it may be a peeled liner. Pull the head and look inside. A new TT Pro 46 is under $100 and will stay up with the 46FX.
Mike Connor is offline  
Reply With Quote
Old 02-04-2008, 10:28 AM
  #4  
rmenke
Senior Member
My Feedback: (13)
 
Join Date: Jun 2004
Location: Merced, Ca., CA
Posts: 2,118
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS46 FX - rebuilt?

nexxa


If you decide to requild that 46FX, suggest you go to Performance Specialities (Nelson Racing guys, or was) for your high quality piston and abc linner. Will also give you a few rpm's. Not designed to be a cheater engine, just a quality replacement parts. Use their good bearilngs also. Cost is about the same or less than OS, much better quality. No more pealing linner either. Actually my TT's have been better than the OS, current design is stronger for sure in the head area. ENJOY
rmenke is offline  
Reply With Quote
Old 02-04-2008, 12:22 PM
  #5  
Flyboy Dave
My Feedback: (21)
 
Join Date: Mar 2002
Location: Pinon Hills, CA
Posts: 13,775
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS46 FX - rebuilt?

....you can also use the Magnum .46 replacement parts which are much better than the OS parts.
The Magnum liner is true brass, with true chrome liner plating....good.

http://www.hobbypeople.net/gallery/281149.asp

FBD.
Flyboy Dave is offline  
Reply With Quote
Old 02-05-2008, 09:00 AM
  #6  
nexxa
Senior Member
Thread Starter
 
Join Date: Nov 2004
Location: Montreal, QC, CANADA
Posts: 165
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS46 FX - rebuilt?

Thanks.

Flyboy Dave
....you can also use the Magnum .46 replacement parts which are much better than the OS parts.
The Magnum liner is true brass, with true chrome liner plating....good.

http://www.hobbypeople.net/gallery/281149.asp

FBD.
Are you sure these parts will fit the 46FX, just before ordering it!? Thanks for reply.

I took a look of the engine inside. There is little rust on the rear bearings, but no loose at all.
The connecting rod look like new.

I will go with a new sleeve and piston and give a hot antifreeze bath to remove all this varnish on the engine head before putting everything together.

I know I can by a new TT.46 or Magnum for ±100$ but, i hate putting something to the garbage. And I like my little OS.46FX!


nexxa is offline  
Reply With Quote
Old 02-05-2008, 12:41 PM
  #7  
Flyboy Dave
My Feedback: (21)
 
Join Date: Mar 2002
Location: Pinon Hills, CA
Posts: 13,775
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: OS46 FX - rebuilt?

....yes, the parts interchange....it has been done a few times....

http://www.rcuniverse.com/forum/m_69...tm.htm#6936314

http://www.rcuniverse.com/forum/m_66...tm.htm#6604087

http://www.rcuniverse.com/forum/m_58...tm.htm#5858864

FBD.
Flyboy Dave 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