On the 2000EX I have three engine driven and one electrical standby hydraulic pumps.
Does the 2000 Ex have a 3rd engine generator or are you refering to the APU, did they add one (not trying to be funny, trying to educate myself?
How does the stby hyd pump a source on electricity ( I was not trying to get into a total system redundancy comarison)?
For me to lose all four would mean having a dual engine failure, complete electrical failure, loss of APU and loss of two aircraft batteries. In this case, I'm pretty well doomed anyway and a RAT wouldn't help me in the least.
A Dual Gen failure requires you to take that ONE bat and have a min of 22v remaining to start the APU, by the time you get to that point on the checklist ( dark over the pond, reading a check list with a flash light trying to start a cold soaked APU, you better be quick because 22v in the sim comes up pretty quickly, while trying to declare an emergency on the tracks). On the G4/5 or 604 the back up electric system just kicked on automaticly, and I am reading a checklist with lights. What about a bus failure? it's my understanding that on the 2000 you can lose the bus's and then have the same problem?
You are correct in your statement about Dassault not wanting the 2000 to compete with the 900. But it's not because the 900 has three engines. It's because the 900 is their flagship, aka their most expensive seller. Why shoot yourself in the foot? Had Dassault left the original 900 fuel quantity in the 2000 (and had the 2000 had the thrust to carry that much more fuel) it would have waved as it passed the 900 stopping for gas.
Not exactly, the F50 was still in production, with the 50ex on the drawing board when the 2000 was designed. Dassault was still trying to market the 50 as the intl aircraft over the 2000. According to the sales men I spoke to, Dassault did not want to lose market share on the 50 so they designed the 2000 as G2 CL600 replacement.
I completely agree that backup systems are great. But do I need a backup to the backup backup system?
Apparently Boeing, Airbus, Gulfstream, Bombardier and even Dasault (with the 3 engine aircraft) feel that it is a good idea[/QUOTE]
Have a nice day