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Old 09-15-2006, 09:24 AM   #1
Alpine328i

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Logic behind the "E" Models?

Why the "E" numbering system and what do the numbers mean?

Like, why the E21, then 30, then 36, then 46, 90, 92, etc.... There's no pattern and it has nothing to do with the year or anything....

Just curious....
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Old 09-15-2006, 09:25 AM   #2
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I am also curious about this
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Old 09-15-2006, 10:22 AM   #3
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the E means development in german. lemme babelfish it to get the right word . . . Entwicklung
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Old 09-15-2006, 10:50 AM   #4
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And the numbers? Anyone?
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Old 09-15-2006, 11:40 AM   #5
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Old 09-15-2006, 01:46 PM   #6
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Well, that partially explains it. So I know what the E and the 3 are for, but what about the second character? (e.g the 6 in E36)
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Old 09-15-2006, 02:21 PM   #7
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sweet site.

even though i new most of that its still fun to read.
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Old 09-15-2006, 04:16 PM   #8
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Well, that partially explains it. So I know what the E and the 3 are for, but what about the second character? (e.g the 6 in E36)
they are just numbers. like the japanese just used to name their weapons type 99 or something. the US named weapons M1, M2, M14, M16, etc. manufacturers mostly use an arbitrary number when they create stuff, they are not going to spend time making up names when they make tons of different things.

its pretty arbitrary. same way with engines. i know honda names their stuff like B16 or something. its just a number available when they start development.

heh, you can tell the document was made in the mid 90's
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Old 09-15-2006, 04:42 PM   #9
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Well, that partially explains it. So I know what the E and the 3 are for, but what about the second character? (e.g the 6 in E36)
You are not reading in the right place. Look for the section titled "1.1.2: Body/Chassis Codes"

A short answer to your question:

'E' stands for development (after the German spelling). The numbers are just incremental serializations of the different designs. Any design that is released for a production vehicle becomes know to the public as the chassis designation for that model.

Like the lubricant, WD-40. That is Dupont's designation for its "Water Displacement" product, 40th iteration of the formula.

Before BMW released the first 2500 sedan (E3 chassis), they probably went through E1 and E2 designs that never received clearance to be taken to production. I imagine they also space them out every so often, just in case they want to go back in there and squeeze something in between existing numbers.

The chassis designations have no real meaning. They simply enumerate the different designs. They will have less of a meaning in the near future, since BMW will now use the Fxx format for its designs, as in F12, F23, etc. The 'F' does not stand for anything. It simply happens to be the letter that follows 'E' in the alphabet.
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Old 09-15-2006, 09:44 PM   #10
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F? when are they doing this? i am too used to E!
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Old 09-16-2006, 01:32 AM   #11
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Yea same. thats gonne suck. "hey man, nice F23"
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Old 09-16-2006, 07:23 AM   #12
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^^^I like it, makes it sound like a fighter jet
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Old 09-16-2006, 02:09 PM   #13
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Then BMW should start making fighter jet engines
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Old 09-16-2006, 04:10 PM   #14
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Actually, they already have (or did). The first engines for the Me-262 were made by BMW, but problems with high operating temperatures were beyond the metallurgy at the time, causing compressor blade failures, and they were later replaced by somewhat more operational Junkers Jumos, although even with these the most the Luftwaffe could get was 20 hours of flight time before the engines had to undergo a near complete tear down.
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Old 09-17-2006, 12:13 AM   #15
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^^^ those were just ICE's, different from "jet engines"

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Old 09-17-2006, 05:42 AM   #16
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No, the BMW 003 was a real turbojet engine; the early prototypes of the Me-262 were flitted with Jumo piston engines because the airframe was ready for flight testing before suitable engines were! (Lots of development problems as one might imagine with such a new technology.) Nice inclusion of NASM exhibit material, by the way.
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Old 09-17-2006, 10:47 AM   #17
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^^^ i missed the part where you said Me-262. the Messerschmitt was the first jet powered plane to be put in production. but i didnt know it was powered by bmw engines!
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Old 09-17-2006, 11:31 AM   #18
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I was rather amazed to find that out myself as well. I gather that the high combustion temperatures led to compressor blade failure, the availability of the right metals and the manufacturing capability being squeezed because of the war, and the switch was made to the Junkers engines which for some reason unknown to me provided at least marginally better service, although from what I understand those early engine designs were technological dead ends.

Interestingly enough, the Heinkel He-200 jet fighter (I think that was the designation) actually preceded the Me-262 (not sure what engines the He-200 had), and in some ways was better, but it never got beyond the prototype and early testing phase due to political and bureaucratic infighting within the Reichluftministerium. As the saying goes, "Imagine how the war would have turned out..."
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Old 09-17-2006, 12:04 PM   #19
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They should have made an ///Me-262 with extra thrust and special rims on the landing gear!
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Old 09-18-2006, 06:12 PM   #20
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last i checked, BMW is still banned from making aircraft engines after the whole world war thing.
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