throttlle cable routing

[PA1195]

Re: throttlle cable routing

If the temp's not too hot I use spiral wrap available at auto or electronics stores. Also use split fuel hose over the line or cable. It can be split with scissors in a radial fashion or simply in a straight cut. Nylon ties also have base mounts that self stick or can be fastened with hardware to surfaces and the tie loops through them.

Gary

[Scott]

Re: throttlle cable routing

Scott which adheres and stays flexible longer, pro seal or RTV?
Carlton

Depends on the material you're trying to adhere to. Pro seal is generally a far superior product, much stronger and it's fuel proof which RTV is not. Certain RTVs can also cause corrosion to certain metals. RTV is available to resist higher temperatures and of course it's convenient one-part out of a tube. Proseal is not cheap and it is two parts so must be mixed. It's easy to make a mess with either so it's worth taking some time to mask things off if necessary.

Spiral wrap is ok, but it doesn't stop chafe, it only provides a less abrasive surface. The fuel tank is soft aluminium. I'd prefer not to have anything rubbing it, not even spiral wrap. Eventually it will get oil/dust/grit in it and work a little like grinding paste.

An alternative would be to stick a piece of baffle material to the tank if there is too much movement for the dab of sealant option. Clear silicone adheres well to the silicone-based baffle materials.

[PA1195]

Re: throttlle cable routing

What Century are we trying to preserve the aircraft for? Given mine is 1941>2018 (77 yrs) I think reasonable chafing precautions are ok, but unless the solution's life won't exceed the problem, then why be over concerned about method? Do the best we can but there does come a time to fly the project. Tach cables require movement and should be dressed accordingly. The rest is Oshkosh trophy baiting in my opinion unless you're a high time yearly Part 135 op.

Gary

[astjp2]

Re: throttlle cable routing

Tim, though I am not 100%sure, mine looks like the garden variety spiral wrap and has been on there over ten years. Still good and pliable.

If you are in the engine compartment, you need the high temp spiral wrap or it has a chance of melting. If under the gas tank, anything will work. I personally used the factory routing and then I don't have to worry about the gas tank. But I also do not have the factory exhaust, I am running the Hanolin Wilson Mufflers from an Aeronca because I wanted heat. Tim

[Scott]

Re: throttlle cable routing

Sure, pick the easy fix, in this case it's easier and also more effective to use a dab of sealant, or glue a piece of rubber to the underside of the tank.

Spiral wrap is one of those things that is perceived to be convenient but is actually a bit of a Pita. But hey, whatever floats your boat!

[PA1195]

Re: throttlle cable routing

I first saw RTV used as an anti-abrasion or standoff tool in the early 1980's. Charly Center (Crosswinds STOL: http://crosswindsstol.com) had literally glued a modified PA-12 together that was used for his STC development. It was everywhere and held most anything that could move from doing bad to itself and others. He worked on my planes (Citabria and Super Cub) and we did similar to potential wear or abrasion prone items.

Later when it came time to remove or adjust them I saw a problem...removing the goo and refastening. RTV is not solvent friendly and often has to be physically removed by scraping. It can't be painted unless it's spec'd as such initially. It's hard to remove traces of the material.

However, the benefit of high temperature and solvent resistant RTV in the engine compartment is well documented. It can be used for successfully sealing cooling baffling and making standoff/fixed location holds in unusual spots that might prove difficult for conventional methods or heat intolerant materials.

Examples of high temp/solvent or oil resistant RTV: https://www.permatex.com/product-cat...gasket-makers/

Gary