treating the interior of the hull

The Forum for RacingSparrow radio controlled yachts. Focussing on build your own scratch building, free plans for download and a comprehensive builders guide book.

Best wishes and happy sailing, Bryn Heveldt.

treating the interior of the hull

Joined: 05 Sep 2014, 19:31

06 Sep 2014, 09:49 #1

hello everybody I am your newest member definitely not the youngest .I've been sailing model yachts
for about a year now and have just completed the hull of a 750 sparrow and am now ready to glass cloth it .
my other model are glass fibre hulls so do not require treating against water ingress I have thought of treating the inside of the balsa hull with Ronseal mat varnish but would be interested in any suggestions or alternatives
Reply
Like

Joined: 04 Jul 2013, 10:53

07 Sep 2014, 11:13 #2

I sealed the inside of my hull by brushing on a thin coat of clear epoxy resin - the same as I used on the outside of the hull. The only thing to think about is the added weight that coating the inside adds. This is of course no problem if you aren't trying to maximize speed for racing your boat.
Reply
Like

Joined: 05 Sep 2014, 19:31

08 Sep 2014, 13:00 #3

thanks for your feedback Snapperhead I don't intend doing any serious racing just the friendly thrash around our local club pond at Bury in Lancashire England we have a good size pond in a local park only problem at the moment is Canada geese we seem to inundated with them , but we manage to coexist had a look at the
pictures of you RS 750 very nice
Reply
Like

Joined: 14 Dec 2014, 16:43

15 Dec 2014, 08:28 #4

Hi there,
I think that the varnish coating on the inside is probably a good idea, but for
a reason that you might not have thought of.
I have just completed the planking stage and it is evident that if the "planks"
can flex it will be impossible to get a very good finish by sanding. A layer of varnish
in the inside will go into the balsa and stiffen it at least a bit and could help with
the finish on the outside.
But obviously at the stage that I am at I have not tried it myself. I was intending
to though.
Tony...
Reply
Like