Go Back  RCU Forums > RC Boats > RC Airboats
Reload this Page >

Length from Stern?

Notices
RC Airboats Discuss R/C Airboats here!

Length from Stern?

Old 04-11-2014, 01:13 AM
  #1  
Croc Man
Junior Member
Thread Starter
 
Croc Man's Avatar
 
Join Date: Feb 2011
Location: Mulgoa, AUSTRALIA
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default Length from Stern?

Hi, on a 40inch flat bottom build, with a 31cc Zenoah, what would be the distance back from the stern that would be a good starting point for
the Engine? Does 7inches sound correct from stern to piston centre? Cheers.
Old 04-11-2014, 10:09 AM
  #2  
1QwkSport2.5r
 
1QwkSport2.5r's Avatar
 
Join Date: Oct 2006
Location: Cottage Grove, MN
Posts: 10,409
Received 74 Likes on 67 Posts
Default

Originally Posted by Croc Man
Hi, on a 40inch flat bottom build, with a 31cc Zenoah, what would be the distance back from the stern that would be a good starting point for
the Engine? Does 7inches sound correct from stern to piston centre? Cheers.
Pusher or puller prop will define where you should start. Generally you want the prop at about 1/3 (hull length) from the transom/stern. On a 40" hull that's about 13.3". This is for a puller configuration and is a starting point only. Either puller or pusher will require moving the engine around to find the perfect balance. I don't use pusher configurations on any of my boats so I can't give you a starting point for that. I don't believe the same "rule" applies to pushers.

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 -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.