Comments sought on new build: A CNC Router for RC Gliders and Planes

**Clive S** · 19-12-2014

Neil I used the Wests System and found it easier to weigh out the two parts with a digital scale rather than by volume and mixing with a flat paddle (strip of ply etc) if this helps. Good luck. ..Clive

**njhussey** · 19-12-2014

Originally Posted by Clive S

Neil I used the Wests System and found it easier to weigh out the two parts with a digital scale rather than by volume and mixing with a flat paddle (strip of ply etc) if this helps. Good luck. ..Clive

Yes the reactive resins is done by weight, twice as much epoxy to harder I seem to remember....will write it down in big numbers so I can't get it wrong!!! I've got some proper mixing sticks this time...

**m.marino** · 21-12-2014

Do you have access to a vacuum pump? IF so, you can put the well mixed resin in an over sized container and degas that way (a sealed 50 gallon drum can act as a chamber if the pump can handle the volume). That gets rid of pretty much all gas in the resin which will make for a much better pour and no worry over bubbles. The issue is getting access or having a vacuum pump that can handle the volume.

Michael

**Clive S** · 21-12-2014

Or a drum that can take a vacuum .. Clive

**njhussey** · 22-12-2014

Ive not got access to a vacuum pump but I'm not too concerned about it as before I did the two pot mixing and pouring through a hole from about 12" and there were very few bubbles. Those that did form were dealt with by a piece of welding wire (didn't have a cocktail stick at work) which as Neale said also helped it find its level.

**njhussey** · 22-12-2014

Cleaned the rails with thinners and used a tack rag to get all rubbish off then put silicone sealant down and put the oiled moat back on. Now waiting for the sealant to go off overnight so I can trim it back inside and then tomorrow am I'll do the epoxy mix and pour. That way it'll have 10 days over Xmas to set!

**njhussey** · 23-12-2014

Well......epoxy pour is done....triple weighed everything and double checked...

Leveled the frame on the floor...

Weighed the epoxy out...

Weighed the harder out...

Mixed it in a cut down 2 litre milk carton first...

Then transfered to a flatter container with a 7mm (ish) hole drilled in a bottom corner with tape over...poured it from a couple of feet high to mix it as it was transferring

Stirred it some more then poured it in the moat with fingers crossed for no leaks....

There are a few bubbles but a quick swizz with a lollipop stick and they went. There are a few microscropic bubbles but I'm not too worried about them...

There are 3 leaks, one from a corner joint on the bridge, and 2 where there must be a gap under the wood. Happy with that as they were stopped with some paper towel and parcel tape.

You could see the epoxy going across the bridge where it was leveling itself off so it obviously works!

Clive, I used a flat stirring stick this time

**njhussey** · 23-12-2014

Nearly all bubbles have gone, leaks have been stopped so now I can stop crawling round on the floor...

**Clive S** · 23-12-2014

Neil Looking good as you know I just flashed the surface with the hot air gun and the small bubbles just disappeared like magic. Happy Xmas. ..Clive

**njhussey** · 23-12-2014

Originally Posted by Clive S

Neil Looking good as you know I just flashed the surface with the hot air gun and the small bubbles just disappeared like magic. Happy Xmas. ..Clive

Clive, I was going to use my blowtorch but there were only a couple of bubbles so i popped them with the lollipop stick, there were so few microscopic ones that I didn't bother....thosse seem to have floated up to the surface and popped over lunchtime.

Merry Christmas and a Happy New Year to you Clive.