Go Back  RCU Forums > RC Airplanes > Questions and Answers
Reload this Page >

OS 70 Surpass Prop

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

OS 70 Surpass Prop

Old 04-05-2007, 01:06 PM
  #1  
kc31406
Member
Thread Starter
 
Join Date: Oct 2006
Location: toledo, OH
Posts: 53
Likes: 0
Received 0 Likes on 0 Posts
Default OS 70 Surpass Prop

What size prop do you use on your OS 70 Surpass 4-stroke engine for Sport flying?

I have an astro hog and would like to know.
Old 04-05-2007, 03:57 PM
  #2  
scott282
Senior Member
My Feedback: (7)
 
scott282's Avatar
 
Join Date: Sep 2004
Location: Buffalo, MN
Posts: 110
Likes: 0
Received 0 Likes on 0 Posts
Default RE: OS 70 Surpass Prop

kc,

I use a 12x8 MA K-Series on my US 40+ with a OS .70 Surpass. You could also try a 13x6. I use the 12x8 on my Saito .72 also.

BTW - Your going to love the Astro Hog. It's an excellent flying airplane.

Scott.
Old 04-05-2007, 04:04 PM
  #3  
MILDBILL-RCU
My Feedback: (6)
 
Join Date: Apr 2003
Location: ROCKWELL, NC
Posts: 397
Likes: 0
Received 0 Likes on 0 Posts
Default RE: OS 70 Surpass Prop

I have an 11-10 on one of mine for ground clearance issues, but does do quite well, the rest have 12-6, 12-8, 13-6, or 14-5. I have a pair going into a B-25 that will run 12-6 three blade props. All keep the rpms under 10,000 on the ground.
Old 04-06-2007, 11:39 AM
  #4  
MinnFlyer
Senior Member
My Feedback: (4)
 
MinnFlyer's Avatar
 
Join Date: Apr 2002
Location: Willmar, MN
Posts: 28,519
Likes: 0
Received 5 Likes on 5 Posts
Default RE: OS 70 Surpass Prop

For an OS 70 (one of my favorite engines) on a Hog Bipe (One of my favortie planes) it would hurt me deeply to use anything but a Graupner 12x8

[link=http://www.hobby-lobby.com/grprop.htm]Graupner Props[/link]
Old 04-06-2007, 10:37 PM
  #5  
chashint
Senior Member
 
Join Date: Dec 2001
Location: Rowlett, TX
Posts: 1,309
Likes: 0
Received 0 Likes on 0 Posts
Default RE: OS 70 Surpass Prop

My favorite for the 70 is 13x6.
Old 04-07-2007, 08:13 AM
  #6  
crasherboy
Senior Member
 
Join Date: Oct 2006
Location: Bryant Pond, ME
Posts: 113
Likes: 0
Received 0 Likes on 0 Posts
Default RE: OS 70 Surpass Prop

I think a 12x8 K series would be a good one on this engine. I have a Funster that had an Enya 60 4c and I used a 12" on that too.It worked out well.

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 - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.