IL-Rant!

[Teflon-Mike]

I have just spotted another post where some-one has reffered to a modern IL4 or 'In-Line' 4.

NO!

Its a STRAIGHT-Four, as in the cylinders are bored along a common centre line. But mounted ACCROSS-THE-FRAME its a Transverse 4 NOT an 'In-Line' or IL4!

THIS is an IN-LINE-Four!
https://www.autogallery.org.ru/k/n/nimbussporth_Ernst.jpg
The cylinders are IN-LINE with wheels, NOT ''transverse' to them
This is a Danish Nimbuis of the 1950's.
https://upload.wikimedia.org/wikipedia/en/1/16/Henderson-1930.jpg
Here's another, a 1930's Henderson

This is a little quirk on the concept; the Sunbeam
https://farm4.static.flickr.com/3074/2547479317_bf55d74156.jpg
It's a british paralel twin of the paralell twin era, but where most, like the Bonaville were 'transverse' parallel twins, THIS is an 'IN-LINE' twin, the crank 'in-line' with the vehicle axis.

Brings us to the Triumph Rocket 3
https://www.motorcyclenews.com/upload/258178/images/Triumph%20Rocket%20III%20MN%20(12).jpg
three pots mounted IN-LINE with the wheels
As oposed to
https://www.realclassic.co.uk/bikepix/jota08062001.jpg
Laverda Jota, a TRANSVERSE tripple!

SO... lets get terminology CLEAR HERE!

https://dayerses.com/data_images/posts/honda-cb-750-four/honda-cb-750-four-07.jpg
THIS is an 'Accross the Frame FOUR' or Transverse-4

https://www.alltimers.nl/Smalltimers/Beelden/Indian%204%20cil/Indian_4-cil_1928_smalltime.jpg
THIS is an IN-LINE 4

Now lets do Vees!

https://motorbike-search-engine.co.uk/classic_bikes/moto_morini_35.jpg
This is an 'in-line' V-Twin.... the V's splayed in-line whith the wheels.

https://www.realclassic.co.uk/bikepix/guzziv7classic09080303.jpg
This is a 'transverse' V-Twin the V splayed accross the bikes center-line

https://fauxkauai.com/WebPost1730.jpg
This is an 'in-line' V4

https://upload.wikimedia.org/wikipedia/commons/8/89/Honda_ST1100_engine_closeup.jpg
This is a transverse V4 (Pan Euro)

HOWEVER, there is anomolu in V-Engines.

The 'in-line' V is a 'transverse' engine, the transverse V an 'in-line' engine!

Becouse the splay of the V is at 90 degrees to the crank-shaft orientation; so installed in the frame, the 'in-line' V has a transverse crank, the transverse V an in-line crank.

So the Pan-Euro, with its V-Four engine is legitimately an 'In-Line 4', though it most decidedly ISN'T a 'straight four'.

R1, CBR600, ZXR750, GSXR1100..... STRAIGHT FOURS, ACROSS THE FRAME FOURS..... they are NOT 'IL4's!

Neither crank nor cylinders are 'in-line' with the frigging wheels!

Are we clear now!
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[P.addy]

It is an in line 4, 4 in a line. 4 pistons in a line.

If I drew a line, it would go across all the pistons.

Its an in line 4.

"Straight 4" would sound shit. Straight 6 sounds epic.

In line 4.

IL4.

Morning old codger.

[Pol Anorl]

Thats a nice inline 4 in the first pic.
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[MattJ]

[P.addy]

[arry]

[Pol Anorl]

[Bezzer]

[Knightsy]

TL;DR - Old men ranting
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[pits]

Hundred percent agree with Paddy, there are 4 cylinders in a line, one after the other, what you seem to be arguing or ranting about is the way that IL4 engine is mounted.

[swiftb]

too.




much.






time.







on.








hands.

[devojunior]

as long as it goes who cares just ride your bikes and stop moaning thank you please.

[Suntan Sid]

Mere semantics!

Why is a parallel twin, mounted along the axis of the frame called a tandem twin? Surely it should be called an In Line twin!
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[daemonoid]

I believe you may be confused Mr Mike...

Transverse / Longitudinal refer to the crankshaft orientation in relation to the chassis...

Inline, V, flat etc refer to the piston orientation...

Even Honda refer to this as a "Liquid-cooled 4-stroke 16-valve DOHC inline-4"

https://www.honda.co.uk/motorcycles/_assets/images/products/full/angle/CB600F-STD-NH312M.png
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[MattJ]

[nowhere.elysium]

Teffers, I would suggest that you duck, but I fear that the massive flock of airborne fucks you're expecting is entirely imaginary on your part.

:edit: edited for clarity, I guess.
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[daemonoid]

[The Shaggy D.A.]

[nowhere.elysium]

[swiftb]

Man spends 3hours conducting post to get point across.


Point is wrong......

https://i289.photobucket.com/albums/ll228/mlke2/FFFFFFFFFUUUUUUUUUU.png

[DrDonnyBrago]

After re-reading it, the issue is the nomenclature of transverse vs. IL...

Who cares?


Write an angry letter to the japanese.

[Mikey3]

I can see your point you're making, generally an engine mounted in line with the front and back wheel is 'in-line' and an engine mounted across the frame is 'transverse'. I've thought of this too, but it's just the way it is. It isn't wrong because if it was manufacturers would call it transverse 4's as opposed to IL4, but they don't, and it's their bike, how can they be wrong at describing their own machine?

Its not like its a mannerism mistake or something stupid like that where people start a sentence with 'basically' and go into extreme depth, or start any sentence with basically used completely out of context or relevance.

Mike
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[Blau Zedong]

This topic is pure autism.
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[map]

Have to agree that the engine can be described as an inline 4. as opposed to a V twin, V4, etc.

Then the mounting in the bike can be described as transverse, parallel, whatever.

However, I've heard old BMW K series described as a flat four It's an inline 4 engine mounted horizontally (i.e. flat).

Ok, after more thought on this - does it really, really, matter?
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[MattJ]