From: Larry Visoski To: Je vacation <jeevacation®gmail.com> Subject: Fwd: Fun Date: Tue, 01 Dec 2015 20:44:57 +0000 From Pete Sent from my iPhone Begin forwarded message: From: Pete Rawson Date: December I, 2015 at 1:38:14 PM AST To: Larry Visoski Subject: RE: Fun Hi Larry, The answers to the questions from JE and you are; The dorsal allows ram air to normally go through the left and right heat exchangers. They are part of the air cycle machines, nothing to do with the precoolers. There are no components, the only change in flow is speed of the aircraft. It also allows ram air to enter the cabin when "Ram" is selected- part of the emergency pressurization system. The air cycle machines "Packs" then work the temperature for the cabin. The overboard air from the pylonThat is the fan air that goes through the precooler valve, and across the pylon radiator. The panel readings meanLow voltage, should also have low pressure indication- That allows the precooler valve to openAir flows across the pylon radiator and cools the input air to the temp system. High voltage, should also have high pressure- that causes the precooler to closeNo air across the pylon radiator. Each side is separate, both in control and function. See you tomorrowRegards, Pete Original Message From: Larry Visoski Sent: Tuesday, December 01, 2015 9:01 AM To: Pete Rawson Subject: Fun mailto: What does dorsal fin do on the G4, I know in the G2 it provided emergency pressurization EFTA00634240 Sent from my iPhone EFTA00634241