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

motor size?

Notices
RC Airboats Discuss R/C Airboats here!

motor size?

Old 02-15-2008, 01:26 AM
  #1  
flytahoe43
Junior Member
Thread Starter
 
Join Date: Mar 2007
Location: South Lake Tahoe, CA
Posts: 19
Likes: 0
Received 0 Likes on 0 Posts
Default motor size?

Hey is there anything against using a .75 in an airboat? Ive got an extra and want to do sumthin with it.

Also, where is a good place to start? Never done this before.
Old 02-15-2008, 08:13 AM
  #2  
jasperrc
Senior Member
 
jasperrc's Avatar
 
Join Date: Aug 2005
Location: Arlington, TX
Posts: 395
Likes: 0
Received 0 Likes on 0 Posts
Default RE: motor size?

Nothing at all wrong with using that motor on an airboat.

What are you looking for in your boat? Classic handling with sliding turns, all out speed, precise control?

What kind of hull are you interested in building? Flat bottom, three pointer, tunnel, hydro, stepped?

What materials are you interested in using? Wood, foam, plastic, metal?

Lots of questions to answer your question.

I'd start with a foam or wood flat bottom. They are easy to build and a lot of fun to drive.

I use a loose formula to determine the size of a flat bottom hull. Based on the specs for the OS .75 AX, the largest prop you would run would be 15". Based on that I would make a hull 18" wide by 32"- 36" long by 2 1/2" deep.
Make the rake start about 1/3 of the length from the bow.
Shoot for a balance point about 1/3 of the length from the stern.

I'm sure others will chime in as well.

The most important thing is to be safe.
The second most important thing is to post pics and vids.
Old 02-15-2008, 12:25 PM
  #3  
flytahoe43
Junior Member
Thread Starter
 
Join Date: Mar 2007
Location: South Lake Tahoe, CA
Posts: 19
Likes: 0
Received 0 Likes on 0 Posts
Default RE: motor size?

Alright thanx for the insight! Im not sure which type im interested in. I think I want to build with balsa. Ive been seeing that some guys build balsa, enforce with ply, and than fiber glass it. Is this a proper tech? Or is the foam core idea better?
Also, could I do a foam core with a balsa shell, and then glass it? Or is that TOO much?

Im stoked! Ive been flying planes for years, but I think this has grasped my attention pretty tight!

Thanx ahead of time for the knowledge boys!
steve
Old 02-16-2008, 11:22 AM
  #4  
D Bronk
Senior Member
 
D Bronk's Avatar
 
Join Date: Apr 2005
Location: Wpg, MB, CANADA
Posts: 2,162
Likes: 0
Received 0 Likes on 0 Posts
Default RE: motor size?


ORIGINAL: flytahoe43

Alright thanx for the insight! Im not sure which type im interested in. I think I want to build with balsa. Ive been seeing that some guys build balsa, enforce with ply, and than fiber glass it. Is this a proper tech? Or is the foam core idea better?
Also, could I do a foam core with a balsa shell, and then glass it? Or is that TOO much?

Im stoked! Ive been flying planes for years, but I think this has grasped my attention pretty tight!

Thanx ahead of time for the knowledge boys!
steve
Yes..Think,, "Foam Core Wings"
Old 02-17-2008, 08:36 PM
  #5  
jasperrc
Senior Member
 
jasperrc's Avatar
 
Join Date: Aug 2005
Location: Arlington, TX
Posts: 395
Likes: 0
Received 0 Likes on 0 Posts
Default RE: motor size?

Foam core with balsa sounds good. I'd say epoxy without glass cloth would be fine.

Keep us posted on your progress.
Old 02-18-2008, 01:17 AM
  #6  
flytahoe43
Junior Member
Thread Starter
 
Join Date: Mar 2007
Location: South Lake Tahoe, CA
Posts: 19
Likes: 0
Received 0 Likes on 0 Posts
Default RE: motor size?

so just sheet with balsa, and then just layer on the epoxy?
Old 02-19-2008, 12:00 AM
  #7  
jasperrc
Senior Member
 
jasperrc's Avatar
 
Join Date: Aug 2005
Location: Arlington, TX
Posts: 395
Likes: 0
Received 0 Likes on 0 Posts
Default RE: motor size?

Yep. Epoxy will add strength. Glass will add more strength but more weight too. Although with that size motor, you might want to consider thin ply rather than balsa. There's a lot of power in that .75.
Old 02-20-2008, 08:44 PM
  #8  
flytahoe43
Junior Member
Thread Starter
 
Join Date: Mar 2007
Location: South Lake Tahoe, CA
Posts: 19
Likes: 0
Received 0 Likes on 0 Posts
Default RE: motor size?

alrighty then! Ill get to work.



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 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.