Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 3 of 3

  1. #1

    Join Date
    Feb 2005
    Location
    Grand Forks, ND
    Posts
    11
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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!

  2. #2

    Join Date
    Apr 2011
    Location
    Melbourne, AUSTRALIA
    Posts
    273
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback
    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

  3. #3

    Join Date
    Oct 2006
    Location
    Cocoa, FL
    Posts
    410
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback
    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


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 05:44 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.