Technical, Techniques, Hints, and Tips > Engineering Techniques and Materials.
Removal of sterntube from Epoxy treated wooden hull
1967Brutus:
--- Quote from: Treble on January 08, 2024, 03:05:49 pm ---To limit the spread of heat to adjacent areas would suggest you look at using La-Co Cool Gel. It ain't cheap , but it is good . Once you got it you will be surprised how many uses you'll find for it. I use a similar American version , which is water soluble , and I can hold a 15mm copper pipe in one hand whilst soldering on a fitting a relatively short distance away with only the gel barrier between. Trevor.
--- End quote ---
I was actually amazed how limited the spread was, as it was: the tunnel was some sort of home made piece using copper fittings, one of them had outside thread and was basically "cast-in" in Epoxy. The entire tunnel loosened in a matter of minutes, but the thread formed in the epoxy held and I could screw the tube out rearwards for a good part. I had to remove that Epoxy with a drill bit afterwards.
1967Brutus:
--- Quote from: 1967Brutus on January 08, 2024, 07:31:57 pm ---I was actually amazed how limited the spread was, as it was: the tunnel was some sort of home made piece using copper fittings, one of them had outside thread and was basically "cast-in" in Epoxy. The entire tunnel loosened in a matter of minutes, but the thread formed in the epoxy held and I could screw the tube out rearwards for a good part. I had to remove that Epoxy with a drill bit afterwards.
--- End quote ---
I tried that with a 75 Watt soldering iron, but it did not do much, purely due to the minimal heat transfer through the contact area.
The hot gasses from the tiny flame however, wow...
I could hold my fingertip at the other end of the tunnel (where the combustion gasses exited) and never felt any heat, but the entire tunnel from rear to front came loose within minutes nevertheless.
Just to tease you guys a bit: This is the NEW tunnel and prop...
https://www.modelbouwforum.nl/attachments/20240107_230537-1-jpg.566442/
https://www.modelbouwforum.nl/attachments/20240107_230548-1-jpg.566439/
(Yup... it's a variable pitch prop... :D :D :D )
Navigation
[0] Message Index
[*] Previous page
Go to full version