Log in
Search
Latest topics
» A Little 400 Mile Hop for Some Memory Lane Stuff, and to Hit a Swap Meet.by duaneh Today at 10:13 pm
» Duende V model from RC Model magazine 1983.
by 1/2A Nut Today at 7:27 pm
» Free Flight Radio Assist
by TD ABUSER Today at 7:18 pm
» Happy 77th birthday Andrew!
by Kim Today at 9:18 am
» Promote the forum with flyers!
by Admin Today at 1:35 am
» Roger Harris revisited
by rsv1cox Yesterday at 7:34 pm
» Engine choice
by GallopingGhostler Yesterday at 4:03 pm
» My N-1R build log
by roddie Yesterday at 9:19 am
» Night flying at Walters RC park
by 1975 control line guy Sun Nov 24, 2024 7:29 pm
» Cox films/videos...
by GallopingGhostler Sun Nov 24, 2024 7:07 pm
» Cox 020 PeeWee rebuild questions
by LooseSpinner99 Sun Nov 24, 2024 6:13 pm
» Did you spot the Cox engine in this NASA research video?
by balogh Sun Nov 24, 2024 5:08 pm
Cox Engine of The Month
How can you strengthen old models?
Page 1 of 1
How can you strengthen old models?
I have several old models where the plastic is brittle, is there any way to strengthen this, like, say, by wrapping it in fiberglass mesh?
7Mile- Moderate Poster
- Posts : 18
Join date : 2019-08-01
Re: How can you strengthen old models?
I'll kick of the discussion by referring you here:
https://sigmfg.com/products/sig-glass-cloth
https://sigmfg.com/products/sig-glass-cloth
ticomareado- Account Under Review
- Posts : 1089
Join date : 2013-10-03
Location : NC
Mark Diedrichs- Gold Member
- Posts : 434
Join date : 2017-11-11
Age : 72
Location : fairfield ohio
Re: How can you strengthen old models?
This is a difficult one because plastics are very hard to work with - paticularly, old plastics that have degraded. Most glues sutable for plastics work by dissolving and softening the components to be joined - almost making a weld.
Fibre glass needs a resin to apply it. normally this is epoxy but epoxy doesn't bond well to plastic. It can be done but the surface needs rough sanding and some fairly agressive scratching to get the epoxy to bond. It also adds quite a bit of weight.
I recently covered too balsa tailplanes using epoy and very this carbon cloth to strenghten them. They are now rock solid but the weight of each went from 8 grammes to 15 grammes.
If you are strengthening the plastic to fly and aren't worried abount appearance then 3m shipping tape will do the job.
https://www.scotchbrand.com/3M/en_US/scotch-brand/products/catalog/?N=4335+3294529207+3294603581&rt=rud
https://www.scotchbrand.com/3M/en_US/scotch-brand/products/catalog/~/Scotch-Reinforced-Strength-Shipping-Strapping-Tape/?N=4335+3294529207+3294580311&preselect=5584785+7566595+3293786499&rt=rud
Fibre glass needs a resin to apply it. normally this is epoxy but epoxy doesn't bond well to plastic. It can be done but the surface needs rough sanding and some fairly agressive scratching to get the epoxy to bond. It also adds quite a bit of weight.
I recently covered too balsa tailplanes using epoy and very this carbon cloth to strenghten them. They are now rock solid but the weight of each went from 8 grammes to 15 grammes.
If you are strengthening the plastic to fly and aren't worried abount appearance then 3m shipping tape will do the job.
https://www.scotchbrand.com/3M/en_US/scotch-brand/products/catalog/?N=4335+3294529207+3294603581&rt=rud
https://www.scotchbrand.com/3M/en_US/scotch-brand/products/catalog/~/Scotch-Reinforced-Strength-Shipping-Strapping-Tape/?N=4335+3294529207+3294580311&preselect=5584785+7566595+3293786499&rt=rud
ian1954- Diamond Member
- Posts : 2688
Join date : 2011-11-16
Age : 70
Location : England
Similar topics
» Engines for Models by Berkeley Models PDF
» Cox Models
» DPC Models P-38
» Experimenting with foam
» What can you tell me about these models?
» Cox Models
» DPC Models P-38
» Experimenting with foam
» What can you tell me about these models?
Page 1 of 1
Permissions in this forum:
You cannot reply to topics in this forum