A shameless image thread for the enginephiles

[FightingHellPhish]

Yes, but those are not milling cutter marks, they are grinding/honing marks, which you wouldn't normally bother with unless it was a port....or a show head.
Given the die grinder with the abrasive roll in the picture I guess they've just been tidied up for photos.

Or theyre more obsessed with weight than an F1 team

[strad]

Oh they are obsessed with weight. But I don't think weight savings is the answer.

[johnny comelately]

From - http://www.maserati-alfieri.co.uk/alfieri26.htm

[J.A.W.]

What goes up, must come down, esp' warplane mills.. ( ~2,400hp Napier Sabre)

[roon]

Amazing lightweight for its era; only takes three guys and a supervisor to lift it.

[J.A.W.]

Pretty sure that mill is suspended from an out-of-shot crane, but at <1lb per hp, it was powerful for its size.

[djos]

Pretty sure that mill is suspended from an out-of-shot crane, but at <1lb per hp, it was powerful for its size.

You can clearly see the crane lifting rig above the engine with taught cables - so yeah I agree it's attached to a crane. If it wasn't, it would have fallen over on to its side.

[gruntguru]

No the supervisor has a large whip (out of shot).

[J.A.W.]

Napier Lion W12 DOHC 4V pressure lube diagram, & from a century ago..

[J.A.W.]

No the supervisor has a large whip (out of shot).

Well, maybe there'd be 'a cat out of the bag', if it was a Royal Navy 'blackgang'... but RAF?
No.. threat of a backhander will suffice for those 'erks'..

[johnny comelately]

Napier Lion W12 DOHC 4V pressure lube diagram, & from a century ago..

http://www.weakforcepress.com/CDs/Napie ... /Fig42.jpg

is that a roller bearing crankshaft?
if it is, how did they build it up?
and oil up the rods?

[J.A.W.]

Rolling element mainbearings, yes Johnny, with split races..
(albeit, even the old Mach IV triple featured a built-up, fully rolling element crank with oil feed to big-end pins).

[johnny comelately]

Rolling element mainbearings, yes Johnny, with split races..
(albeit, even the old Mach IV triple featured a built-up, fully rolling element crank with oil feed to big-end pins).

its a hell of a bit of engineering for a 100 years ago, hats off to them

[djos]

No the supervisor has a large whip (out of shot).

I assume that's sarcasm?

[J.A.W.]

Surely not!

So maybe its ironmongery, ah sorry - I mean, irony..