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Discussion Starter · #1 ·
I'm looking to mount some servos for RC in one of my engines but need to "glue" them in place. Normal I mount brass tabs and screw the servos down, but due to space I can't do that on this loco. I want an adhesive that can be removed if the servo fails, but won't soften when the loco gets hot. What is likely to work best? Epoxy? RTV? Goo?

Thanks,
Mark
 

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Epoxy a brass tab to the engine in the appropriate place and bolt the servo to that. If the servo fails it can be replaced by just unbolting it.

I would use JB-Weld.
 

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Discussion Starter · #3 ·
That is what I have done in the past, but I had to remove the servo mounting tabs to fit them in this loco, so I need to glue the servo directly to the cab. Obviously I want the servo to be removable (with some work) if needed.
 

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I have been areomodelling for 30 years and have never used mounts to attach servos in the wings I use a good quility silicon sealant and just bed the servo down onto it when it goes off you will never move it. If I ever need to get it out you can get some very thin wire and slice through the silicon like cheese wire or twist the servo out. A 10 minute epoxy glue could be used but I have found that high tempertures causes the glue to soften again so not sutable for locos.
 

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use a double sided tape. it comes in a thickness about 1/16" thick. I'm away from home. On Wednesday, I'll give you the exact name, it's by 3M. Works like a champ and the servo can be removed without a problem.
 

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I've had good luck installing receivers, servo smoothers and the like with the double-sided tape the R/C airplane guys use, although it leaves a sticky mess if you have to move the component. No experience using it for servos, so I can't say for certain how well it would hold over time, given the torque a servo would generate.
 

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Velcro tape...works great...even helps insulate. If it heat warps/shrinks, you can easily replace the tape too. Completely cover the mounting area with the velcro...so that the servo doesn't move when it operates...don't be stingy.
 

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Try 3M #9485 hoop and loop fastener - it is rated for UV exposure and high temperature. 3m double sided foam mounting tape also works but you need the industrial version - the stuff you typically see at retaillers isn't strong enough for prolonged use. Distrust the manufacturers specifications on acceptable load as these usually refer to the 'pull off' strength - servos tend to exert lateral loads in operation.

I put radio control into my berkshire without drilling a single hole and relied entirely on a combination of double sided foam tape and hook and loop fasteners.

Robert
 

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I drilled 2 holes into the cab floor and put some wire through it, and wrapped it around the servo and twisted it, it worked great.

if u need to remove it, just untwist the wire.
 

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I've used clear silicone sealer with good results over the years. Very solid but removable with some effort and no holes drilled into the steamer...

Carl Malone
 

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Clear silicone works great, BUT, both surfaces need to be very clean for good adhesion. Apply the silicone and clamp in place overnight for best results.
 

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Discussion Starter · #14 ·
Thanks everyone. I currently have the servos mounted with some of Eric's killer sticky red tape that Henner mentioned, but the do move a bit and I was concerned that with heat they might come loose. Did a test firing today and it appear I have some non RC issues to resolve, so I'll just "stick" with the red tape for now and probably switch to silicon once all the gremlins are gone.
 
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