Hello,

I have got a very small cracks on my multicopter landing gear made of carbon fibre K3. The cracks are by the middle guided holes on the port side of the landing gear and although there are very small cracks I would like to know if they could be reinforced or fix with one of your products.

Could you please recommend which one will work better in this kind of cracks.

Regards

Miguel

Hi Miguel,

Yes, I would certainly say it would not be difficult to do some local reinforcement of the carbon where you have those crack.

My suggestion would be to get 500g of our EL-2 Laminating Epoxy, a 150mm Mini Roll of 90g Carbon Fibre Cloth, a 1/2" Laminating Brush (nothing special about this, just in case you don't have a brush handy) and then a metre of Unperforated Release Film. To make the repair just key up the damaged area with a 120grit (or thereabouts) abrasive paper and cut some small reinforcement patches out of the 90g carbon. Wet the area to be repaired with some epoxy and then press the first of your repair patches onto that wet epoxy. Wet it through with a little more resin and then add at least one more layer (but as many as you want to build up the strength). You can make the patches increasingly larger so that you end up with a 'feathered edge' to the repair (thinner at the edges, thicker in the middle) so that there's not a step at the edge. When you're done, wrap or pull and tape some release film over the repair until it's cured.

Once it's cured, drill the hole back out again.

I hope this helps; it should be easy to make a good job of a repair/reinforcement like this.

All the best, Matt

Matt Statham
Easy Composites / Carbon Mods - Technical Sales

Thanks a lot Matt for your advice. I will do as you recommend.

With regards

Miguel

Just one stupid question, when you are saying to use EL- 2 Laminating Epoxy to wet the fibre, are you using any of the hardener that come in the pack?

Hi Miguel,

Yes, certainly. Whenever we talk about using epoxy resins for laminating, coating, infusion or anything else we always mean for you to mix it, at the correct ratio, with its hardener.

All the best, Matt

Matt Statham
Easy Composites / Carbon Mods - Technical Sales

OK thanks a lot for your time and info.

Mig