Which Peter :-) On an Airbus there are 3 primary flight computers and 2 secondary flight computers. Only one computer is needed to fly teh aircraft and these all work in parallel so there is no "changeover" delay. The primary and secondary computers are designed and built by different companies to make sure there are no what are called "common cause failures". Each control surface is controlled by a number of actuators each of which is driven from a different channel, so one computer or one actuator going down won't affect the control of that surface. There are three different hydraulic systems using different routes through the aircraft. I'll take the other Peter's word on the fuel management system. I'm not so familiar with that. On signalling systems we tend to have a two out of three system using identical computers and if it all suffers "perpendicular mammary syndrome", we just turn the signals to red and stop all the trains! Cheers Peter (Trowbridge, Railway Signalling Engineer) On Wed, 5 Nov 2008 08:27:42 -0000, "kenny" <kenny.macdougall@xxxxxxxxxxxxxx> wrote: > Hi Peter > Do you work with Aeroplanes > Kenny > Skye > > ----- Original Message ----- > From: <peter.chadwick@xxxxxxxxxxx> > To: <modeleng@xxxxxxxxxxxxx> > Sent: Wednesday, November 05, 2008 8:16 AM > Subject: [modeleng] Re: Fw: airbus cockpit 380 360 view > > >> >They don't have fuses - they use circuit breakers.< >> Not always the right ones, though. >> >> Boeing 747-436, G-BNLA 03-96.pdf >> >> >> ---------- >> Zarlink Semiconductor Limited is a Company registered in England and > Wales >> under number 00705031 with its registered office at Cheney Manor, > Swindon, >> Wilts SN2 2QW, England. >> >> This email is confidential and may contain information that is > privileged >> and >> exempt from disclosure by law. If you have received it in error, please >> contact >> the sender immediately by return email and then delete it from your >> system; you >> should not copy it or disclose its contents to anyone. Emails are not >> secure >> and cannot be guaranteed to be error free as they can be intercepted, >> amended, >> lost or destroyed, or contain viruses. Anyone who communicates with us > by >> email >> is taken to accept these risks. >> >> >> MODEL ENGINEERING DISCUSSION LIST. >> >> To UNSUBSCRIBE from this list, send a blank email to, >> modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the > subject >> line. >> > > > MODEL ENGINEERING DISCUSSION LIST. > > To UNSUBSCRIBE from this list, send a blank email to, > modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject > line. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.