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breather tube penetration at firewall

JimW

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Hi all,

We are planning for the remaining routing and tabs for anything that will need to mount to this fuselage. For the breather tube (connected to the slobber pot) we will have a 1" aluminum tube that will need to penetrate the firewall somehow. I haven't exactly seen a bulkhead fitting to do this. I have seen the chapter in Firewall Forward on making protective shields for firewall openings. Is this the standard way to pass the breather tube through? Is it possible to still find asbestos rubber to make a gasket with?

Last question, how high up on the firewall (in relation to the engine mount is fine) should this tube penetrate? I understand the need for gravity flow to the exit point of the aircraft. Anyone have a general rule of thumb for this?

cheers,
Jim

 

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