Two runs of 1/2″ 3003 Aluminum tubing are run from the firewall up to the nose of the aircraft, and then covered in heat shrink tubing to add some insulation value to the line. At the aft end, the lines are installed with nuts and unions to a pre-made (by the factory) plate, and safety-wired. At the nose, we needed to install a 2-way valve so that we can select to heat either the fresh air oil cooler/cabin heater, or the recirculating air cooler/heater. An aluminum bracket was installed to hold the valve steady against the load of operating the valve, and stainless steel flexible tubing was run to and from each cooler/heater.

Oil Tubing with Heat Shrink

Oil Lines at Firewall

Rear Cooler Bracket

Oil Diverter Valve Installed

Oil Tubes Return Tee and Supply 3-Way valve

Oil Tubing to Both Nose Coolers/Heaters

Nose Cooler Duct

Nose Cooler Valve


Posted By: Brett Ferrell
Saturday May 24th, 2003 at 8:51 PM

Categories: Cabin Heat Engine Plumbing
Tags: Building Cooling Engine Fuselage Oil

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