Page 66 of 84
Re: A shameless image thread for the enginephiles
Posted: 20 Mar 2018, 00:16
by FightingHellPhish
PhillipM wrote: ↑19 Mar 2018, 23:45
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
Re: A shameless image thread for the enginephiles
Posted: 20 Mar 2018, 00:20
by strad
Oh they are obsessed with weight. But I don't think weight savings is the answer.
Re: A shameless image thread for the enginephiles
Posted: 02 Apr 2018, 23:01
by johnny comelately
Re: A shameless image thread for the enginephiles
Posted: 03 Apr 2018, 03:11
by J.A.W.
What goes up, must come down, esp' warplane mills.. ( ~2,400hp Napier Sabre)
Re: A shameless image thread for the enginephiles
Posted: 03 Apr 2018, 20:08
by roon
Amazing lightweight for its era; only takes three guys and a supervisor to lift it.
Re: A shameless image thread for the enginephiles
Posted: 04 Apr 2018, 00:36
by 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.
Re: A shameless image thread for the enginephiles
Posted: 04 Apr 2018, 01:34
by djos
J.A.W. wrote: ↑04 Apr 2018, 00:36
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.
Re: A shameless image thread for the enginephiles
Posted: 04 Apr 2018, 06:32
by gruntguru
No the supervisor has a large whip (out of shot).
Re: A shameless image thread for the enginephiles
Posted: 04 Apr 2018, 06:39
by J.A.W.
Napier Lion W12 DOHC 4V pressure lube diagram, & from a century ago..
Re: A shameless image thread for the enginephiles
Posted: 04 Apr 2018, 08:57
by J.A.W.
gruntguru wrote: ↑04 Apr 2018, 06:32
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'..
Re: A shameless image thread for the enginephiles
Posted: 04 Apr 2018, 09:33
by johnny comelately
is that a roller bearing crankshaft?
if it is, how did they build it up?
and oil up the rods?
Re: A shameless image thread for the enginephiles
Posted: 04 Apr 2018, 09:42
by 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).
Re: A shameless image thread for the enginephiles
Posted: 04 Apr 2018, 10:28
by johnny comelately
J.A.W. wrote: ↑04 Apr 2018, 09:42
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
Re: A shameless image thread for the enginephiles
Posted: 04 Apr 2018, 11:03
by djos
gruntguru wrote: ↑04 Apr 2018, 06:32
No the supervisor has a large whip (out of shot).
I assume that's sarcasm?
Re: A shameless image thread for the enginephiles
Posted: 04 Apr 2018, 11:08
by J.A.W.
Surely not!
So maybe its ironmongery, ah sorry - I mean, irony..
