Author Topic: Engine Porn  (Read 8743 times)

Offline Admiral_dk

  • Full Member
  • ****
  • Posts: 1794
  • S°ften - Denmark
Engine Porn
« on: October 20, 2015, 09:43:29 PM »
I just saw this Picture of a Ducati V4 1000 MotoGP engine without it's side cover :


This is a very beautiful gear driven cam system - hope you all enjoy it  :wine1:

Offline vascon2196

  • Full Member
  • ****
  • Posts: 74
  • "a good craftsman never blames his tools"
Re: Engine Porn
« Reply #1 on: October 21, 2015, 12:28:13 AM »
Awesome....just amazing.
Chris from Southeastern Massachusetts

"a good craftsman never blames his tools"

Offline paul gough

  • Full Member
  • ****
  • Posts: 405
  • Tropical Queensland, Australia
Re: Engine Porn
« Reply #2 on: October 21, 2015, 12:54:37 AM »
Desmo madness, beautiful in its own way but definitely a price to pay for it! Paul Gough.

Offline mcostello

  • Full Member
  • ****
  • Posts: 68
  • Lancaster, Ohio
Re: Engine Porn
« Reply #3 on: October 21, 2015, 04:48:31 PM »
I think I hear a small "tick" in the gear train, where do I start? :Lol:

Offline Allen Smithee

  • Full Member
  • ****
  • Posts: 985
  • Mordor, Middle Earth
Re: Engine Porn
« Reply #4 on: October 21, 2015, 05:05:03 PM »
"So Boss - I've nearly finished that final gear job you wanted but I need a decision. This last gear tooth - do you want one big one or two little ones?"

AS
Quidquid latine dictum sit altum sonatur

Offline Niels Abildgaard

  • Full Member
  • ****
  • Posts: 155
Re: Engine Porn
« Reply #5 on: October 21, 2015, 06:31:30 PM »
Dare I say over-enginering?
A V2 two stroke with fuel injection will be ligther ,smaller,cheaper etc and who cares for pollution from motorbikes ?

Offline gbritnell

  • Full Member
  • ****
  • Posts: 2175
Re: Engine Porn
« Reply #6 on: October 21, 2015, 08:48:12 PM »
While I fully understand the need to use gears to transmit power in such a confined space I would think that the combined clearance from gear one to gear four in the cam drives could cause some unneeded clatter, especially with the cam lobes loading and unloading. I also question the use of gears when today the use of toothed belts is so prevalent. Yamaha got away from gear lash by using one gear which was split probably 60/40 or 70/30 and had cushion springs between the two gears to eliminate the problem.
It does look very mechanical though.
gbritnell
Talent unshared is talent wasted.

Offline Admiral_dk

  • Full Member
  • ****
  • Posts: 1794
  • S°ften - Denmark
Re: Engine Porn
« Reply #7 on: October 21, 2015, 09:02:20 PM »
Quote
Dare I say over-engineering?
A V2 two stroke with fuel injection will be lighter ,smaller, cheaper etc. and who cares for pollution from motorbikes ?

Honda forced / persuaded the whole series to abandon two-strokes and go from 500 cc. to 1000 cc. in order for the bikes not to be slower - though this particular bike is quite a rocket ship with a top speed around 350-360 Km./h (>320 mph).

The weight gain switching from two-strokes to four, went from <130 Kg. to >163 Kg. - so I agree that they are "porkier", much more expensive and no one cares about the pollution from a non road going racer.

I'm not sure this engine is equipped with a desmodronic valvetrain as the road bikes, but rather pneumatic closed valves.

Cost is almost a non-issue as they are only allowed to bring max 6 engines per rider for the whole season !!!!

Not one engine supplier uses belts and Honda spend north off $500.000.000 on the equipment for two riders in a season (four bikes), so I'm guessing that this is the optimum solution.

Offline bp

  • Full Member
  • ****
  • Posts: 80
  • Adelaide, SA
Re: Engine Porn
« Reply #8 on: October 21, 2015, 11:21:12 PM »
I see that (at least) Toyota, in their Yaris and Subaru (Impreza) have gone back to timing chains instead of belts, to drive cam shafts.  I'm guessing because of the incredible service cost when having to change a belt.

This Ducati looks gorgeous!!
cheers
Bill

Offline b.lindsey

  • Global Moderator
  • Full Member
  • *****
  • Posts: 13840
  • Dallas, NC, USA
    • Workbench-Miniatures
Re: Engine Porn
« Reply #9 on: October 22, 2015, 12:43:39 AM »
Well despite the merits or lack thereof of having this many gears in a train (as George points out), it certainly fits the title of engine porn of the highest order.  Of course I am only reading the thread for the comments, not for the pictures  :lolb:

Bill

Offline Tennessee Whiskey

  • Full Member
  • *****
  • Posts: 3776
  • Springfield, Tennessee. USA
Re: Engine Porn
« Reply #10 on: October 22, 2015, 01:35:55 AM »
Don't worry Bill,  I just heard where they are going to print only the contents we were supposed to be buying it for anyhow  and no pics, well sorta  :lolb:. This is the "Ferrari Syndrome " . Just build something with more complications than a one off Swiss watch and a super exhaust note and  some Sheik or rock star  or something  will pay more money than the law allows.  It just has to be super trick,  super expensive,  and maybe last for just a little while.  Waste of talent,  yet,  brilliant marketing  :cheers:..

Cletus

Online Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 13564
  • Hampshire, england.
Re: Engine Porn
« Reply #11 on: October 22, 2015, 07:35:52 AM »


 ::)

Jo
Enjoyment is more important than achievement.

Offline Jasonb

  • Full Member
  • *****
  • Posts: 7347
  • Surrey, UK
Re: Engine Porn
« Reply #12 on: October 22, 2015, 07:43:37 AM »
When you starting on the 1/3rd scale one of those Jo? Looks to be plenty of studs around the perifery and I'm sure all those gear cutters on your wall would like a bit of action.

Whats the engine? Is it one of Eric's

J

PS fingers crossed ;)
« Last Edit: October 22, 2015, 08:15:28 AM by Jasonb »

Online Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 13564
  • Hampshire, england.
Re: Engine Porn
« Reply #13 on: October 22, 2015, 08:18:05 AM »
That's a Bristol. I wouldn't put it past Eric to have owned one at some time but they have all gone now :-\

I would like to do a Bentley radial but then I would also like to do a Gnome rotary the problem is work gets in the way  :toilet_claw:

Jo
Enjoyment is more important than achievement.

Offline Allen Smithee

  • Full Member
  • ****
  • Posts: 985
  • Mordor, Middle Earth
Re: Engine Porn
« Reply #14 on: October 22, 2015, 08:19:46 AM »
It looks like a sleeve-valve 2-row radial - I'm guessing a Bristol Hercules.

PDR
Quidquid latine dictum sit altum sonatur