DIY_EFI Digest V5 #879

[Steve.Flanagan at VerizonWireless.com]

Much agreed Bill

But the difference here is a fighter aircraft cost at least 20M and is
provided for
by a huge budget where survivability is the biggest concern.

Regarding Doms initial email, if he is looking to spend $100 for the brains
of
his daily driver, then he has no room to ask for redundancy, these days $100
bucks
wont even get you a nice night out with your spouse.  If he ups his
budget, then he could have as much redundancy as he would like to purchase.

Redundancy has a price.

steve





-----Original Message-----
From: bill.shurvinton at nokia.com [mailto:bill.shurvinton at nokia.com]
Sent: Tuesday, November 20, 2001 3:00 AM
To: diy_efi at diy-efi.org
Subject: RE: DIY_EFI Digest V5 #879


Depends how you define a failure and what service level you expect
afterwards.

Anyway redundant batteries, fuel pumps and ECUs are quite common in
rally cars.

If you have a double pulley system you have redundant fan belts, as my
car does.

Transmissions have multiple gears. If one goes then you have others. If
clutch goes you can still drive (depending upon failure mechanism) etc. 

Or put it another way. If you work on fighter aircraft you don't deal in
failures, as one is always guaranteed, you deal with mission
survivability.

Bill

-----Original Message-----
From: ext Steve.Flanagan at VerizonWireless.com

Can't make every single point of failure redundant on a auto, otherwise
we
would have to carry two of the following:

Batteries
Alternators
Fuel pumps
ECUs
Fan belts
Transmissions
etc

Sometimes you just have to take some risks, and carry a cell phone.
   

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