RC Airboats Discuss R/C Airboats here!

How much engine do I need?

Reply
Old 08-09-2013, 09:29 AM
  #1
rash_powder
Thread Starter
 
Join Date: Feb 2005
Location: Grand Forks, ND
Posts: 13
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default How much engine do I need?

I am looking to build my first airboat. Been lurking and reading off and on for years now, and finally getting to where I think I should do it. The boat is going to be about 20" x 40" with a flat bottom. I'm pretty sure I have all the details of the build worked out in my head, but I am not sure how big of an engine I will need. I am looking to use a 3 blade 16"x10 pusher propeller. First I am going to get the engine, mod what I need to on that and build the boat around the mounting needs of the engine. It just seems smarter/easier to go engine first. So, knowing I am looking to use the 16x10 pusher, would a 30.1cc Echo chainsaw engine be enough? I have found one locally for $50. The propeller is @ Tower hobbies, they only offer a 16" 3 blade. If 30.1cc isn't big enough, what size should I look for? Would getting a pipe for the engine help any or no? I know the tuned pipes help a lot on my Baja and make the race boat motors scream. Thanks!
rash_powder is offline  
Reply With Quote
Old 08-09-2013, 05:03 PM
  #2
Altered1
 
Join Date: Apr 2011
Location: Melbourne, AUSTRALIA
Posts: 274
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

I would get your engine sorted, then by the sound of it, you are going to have to mod it for use with a prop. Get that done first, and then we can sort out a prop. Check the Gas engine conversion thread: http://www.rcuniverse.com/forum/engine-conversions-92/

Your hull size is about the same size as my body board builds. I run a .60 and a .52 glow engines on 10 - 12 inch props. My second hull has a 25cc Homelite conversion, spinning a 18 x 6 prop. All work fine.

Good luck with the build
Altered1 is offline  
Reply With Quote
Old 08-10-2013, 11:28 AM
  #3
DJLaPalme
 
Join Date: Oct 2006
Location: Cocoa, FL
Posts: 438
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

An Echo 30.1cc engine should be more than enough power. You need to check the rotation of the engine because as far as I know chain saw engines turn cw not ccw like most engines. That is actually a good thing because you can use regular tractor props instead of just pushers, which have a limited selection. Only use nylon, or plastic props. Wood will chip and fly apart in time. I have not used carbon fiber props but they should work too, they just cost a lot more. Dennis
DJLaPalme is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

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



All times are GMT -8. The time now is 09:48 PM.