Go Back  RCU Forums > RC Boats > RC Boats General Discussion
Reload this Page >

Fiberglass the hull

Notices
RC Boats General Discussion Discuss general rc boating topics here.

Fiberglass the hull

Old 07-14-2010, 06:38 PM
  #1  
MadManAndrew
Senior Member
Thread Starter
 
Join Date: Dec 2007
Location: Dallas, TX
Posts: 3,954
Likes: 0
Received 0 Likes on 0 Posts
Default Fiberglass the hull

Would an experienced boat builder please explain how to fiberglass balsa boat hulls? I made an attempt at it today using techniques and reccomendations I found on a how-to site, but it turned out far from acceptable. I'd also appreciate some tips on removing hardened glass resin from balsa...Just fine-grit sandpaper? Thanks in advance.
Old 07-14-2010, 07:00 PM
  #2  
Dreamin Hemi
 
Dreamin Hemi's Avatar
 
Join Date: Nov 2004
Location: Milton, DE
Posts: 2,638
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fiberglass the hull

firststatecomposites.com/howitsdone_.html

The link above will give you the basics. Even though it shows how I build fiberglass hulls from my molds, the techniques are the same. Getting resin off balsa? Lots of sandpaper. How about some pictures of what you got yourself into...

A few questions for you....
  1. What weight cloth are you using?
  2. How are you manipulating the cloth?
Old 07-14-2010, 07:06 PM
  #3  
MadManAndrew
Senior Member
Thread Starter
 
Join Date: Dec 2007
Location: Dallas, TX
Posts: 3,954
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fiberglass the hull

I was trying to use 3/4 oz., as I'm basicly just trying to seal the wood, but it seems just way to fragile to even work with it...Even just sliding it around on the table to cut it started to stretch and unthread.
Old 07-14-2010, 07:22 PM
  #4  
Dreamin Hemi
 
Dreamin Hemi's Avatar
 
Join Date: Nov 2004
Location: Milton, DE
Posts: 2,638
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fiberglass the hull

use a 1/4" nap 3" long paint roller or disposable brush and apply a coat of resin directly to your hull FIRST. Once covered with a thin coat of resin, drape the cloth you have over and roll or use your brush and work the glass in different directions as shown in my website page.
Old 07-14-2010, 07:36 PM
  #5  
Dreamin Hemi
 
Dreamin Hemi's Avatar
 
Join Date: Nov 2004
Location: Milton, DE
Posts: 2,638
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fiberglass the hull

Another thing, to avoid snags while trimming the cloth, use sharp scissors.....it makes a huge difference. When cuttign your cloth from the roll or table, try using a straight edged ruler and a new razor knife ran along the edge. It holds the cloth nicely and the shap razor glides across without pulling the fibers around.
Old 07-14-2010, 07:41 PM
  #6  
MadManAndrew
Senior Member
Thread Starter
 
Join Date: Dec 2007
Location: Dallas, TX
Posts: 3,954
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fiberglass the hull

That's where the problems came in. I draped the cloth over the hull and began to try and pull and spread the wrinkles and creases out, but the resin made it so that it just folded over itself and created large folds I couldn't work out, and I ended up having to scrap the cloth.
Old 07-14-2010, 07:42 PM
  #7  
MadManAndrew
Senior Member
Thread Starter
 
Join Date: Dec 2007
Location: Dallas, TX
Posts: 3,954
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fiberglass the hull

That's where the problems came in. I draped the cloth over the hull and began to try and pull and spread the wrinkles and creases out, but the resin made it so that it just folded over itself and created large folds I couldn't work out, and I ended up having to scrap the cloth.
Old 07-14-2010, 07:45 PM
  #8  
Dreamin Hemi
 
Dreamin Hemi's Avatar
 
Join Date: Nov 2004
Location: Milton, DE
Posts: 2,638
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fiberglass the hull

Sounds like you may be doing too large an area at once. Work on one section at a time. Overlap each section by 1/4 to half an inch. You will have pleanty of time to work the glass around. Heck, I glass an entire mold with two layers of different glass types before it kicks off. Take you time and plan ahead what you will need before you mix your resin.
Old 07-14-2010, 07:47 PM
  #9  
MadManAndrew
Senior Member
Thread Starter
 
Join Date: Dec 2007
Location: Dallas, TX
Posts: 3,954
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fiberglass the hull

Okay, thanks for the tips. I'll have another go at it tomorrow and report back with results!
Old 07-14-2010, 08:03 PM
  #10  
Dreamin Hemi
 
Dreamin Hemi's Avatar
 
Join Date: Nov 2004
Location: Milton, DE
Posts: 2,638
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fiberglass the hull

Good luck. If you feel the need to give me a call, please do not hesitate. PM me if you would like my number. I'll be in the shop most the day but always have my cell with me.
Old 07-18-2010, 09:30 PM
  #11  
MadManAndrew
Senior Member
Thread Starter
 
Join Date: Dec 2007
Location: Dallas, TX
Posts: 3,954
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fiberglass the hull

Fiberglassed the bottom of the hull today! Using a few things I picked up from you, and a couple tips I got from talking to my dad about the big boats, it turned out pretty good.  Pics when I get the rest done.
Old 08-17-2010, 11:01 PM
  #12  
Doc.316
Senior Member
 
Join Date: Nov 2007
Location: Wichita, KS
Posts: 303
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Fiberglass the hull

A really cool tip for fiberglassing...Use the backing off of Monokote..(ya know the stuff the airplane guys use)....which can be obtained at a hobby shop (they sell it in monokote rolls at the shop I go to)......well wett the surface (boat/airplane)....lay glass down ..wet glass.....put monokote backing on ......get your credit card out (don't worry it wont cost ya unless you get epoxy on the card)...start at the middle and work all the air bubbles out ...and at the edges mop up the excess with a paper towel......tape down the edges...and let it set...

The next morning get up and peel off the monokote backing. You will have a surface with light sanding and priming that is ready for paint..

It works really well.

Steve

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 or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.