Author Topic: 917 180 degree V 12  (Read 84951 times)

Online Vixen

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Re: 917 180 degree V 12
« Reply #120 on: July 12, 2016, 02:43:54 PM »
Dave,
I looked at your marked up print. I agree I believe you have found the oil drillings for the camshaft bearings. I also believe you can see the shape of the full length oil passage under your red line. Nothing wrong with listening to another opinion and revising your own thoughts. That's team work.

Mike

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Sometimes, it can be a long and winding road

Offline steamer

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Re: 917 180 degree V 12
« Reply #121 on: July 12, 2016, 02:47:23 PM »
In any case......I think this is a viable solution for the model...at least as far as lubricating the cam shaft bearings....the other approach would be to run the cam shaft on ball bearings instead, an thus avoid the need for this extra plumbing...but we need a good way to lube the cam lobe/tappets, and it appears that they accomplished this and is shown in the same photo.

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Offline steamer

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Re: 917 180 degree V 12
« Reply #122 on: July 12, 2016, 02:48:03 PM »
Dave,
I looked at your marked up print. I agree I believe you have found the oil drillings for the camshaft bearings. I also believe you can see the shape of the full length oil passage under your red line. Nothing wrong with listening to another opinion and revising your own thoughts. That's team work.

Mike

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Online Vixen

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Re: 917 180 degree V 12
« Reply #123 on: July 12, 2016, 02:53:59 PM »
Good progress,
Your on your own for a bit. I am going downstairs to watch the last hour of today's stage of Le Tour.
Mike
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Sometimes, it can be a long and winding road

Offline steamer

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Re: 917 180 degree V 12
« Reply #124 on: July 12, 2016, 02:55:12 PM »
If I were a betting man....I would bet the "nozzle" just to the side of the tappets has a orifice drilled in it to allow a certain amount of oil to flow to each tappet, and I would bet it's in the form of a cap screw with a seal washer...the thickness of which you adjust to get it aimed right.....

I think for a working model, doing demo runs, some dribbling on the moving parts is more than sufficient.....we can figure that one out.....

Dave
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Offline steamer

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Re: 917 180 degree V 12
« Reply #125 on: July 12, 2016, 02:59:35 PM »
case pressure oil feed path......I think.

Dave
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Online Vixen

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Re: 917 180 degree V 12
« Reply #126 on: July 12, 2016, 03:13:52 PM »
Dave, that's how I read the crankcase plumbing. We are in agreement and it looks possible to copy at 1/3 ish scale.

The camshaft oilways may be a bit more tricky in small size.

 Not sure the oil filter was fitted to all the earlier versions, perhaps only the later and Can Am engines.

Mike
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Sometimes, it can be a long and winding road

Offline steamer

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Re: 917 180 degree V 12
« Reply #127 on: July 12, 2016, 03:22:44 PM »
oil filter    69'

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Online Vixen

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Re: 917 180 degree V 12
« Reply #128 on: July 12, 2016, 05:47:01 PM »
If we keep looking in the right places we will find all the answers.

The problem is always in finding the right places.

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline steamer

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Re: 917 180 degree V 12
« Reply #129 on: July 12, 2016, 06:11:17 PM »
If we keep looking in the right places we will find all the answers.

The problem is always in finding the right places.

Mike

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Offline Niels Abildgaard

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Re: 917 180 degree V 12
« Reply #130 on: July 12, 2016, 07:15:56 PM »
Crankshaft parts rom a Hirth HM504 aircraft engine

Offline Admiral_dk

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Re: 917 180 degree V 12
« Reply #131 on: July 12, 2016, 09:58:22 PM »
While googling this subject I stumbled over those two engines :

http://blog.hemmings.com/index.php/2015/10/30/kinetic-sculpture-internal-combustion-style-modeling-the-porsche-904-and-917-engines/

Sorry - but no pressure Dave

Offline steamer

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Re: 917 180 degree V 12
« Reply #132 on: July 13, 2016, 02:31:27 AM »
While googling this subject I stumbled over those two engines :

http://blog.hemmings.com/index.php/2015/10/30/kinetic-sculpture-internal-combustion-style-modeling-the-porsche-904-and-917-engines/

Sorry - but no pressure Dave

Couple of things...that is 1/4 scale...I'll be 3/10    larger still      That didn't have an output shaft off the crank....kinda odd.....Mine will...like the real 917.

No pressure at all!   I'm having fun...but I have a Wallaby to build first!....

Dave
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Offline Art K

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Re: 917 180 degree V 12
« Reply #133 on: July 13, 2016, 03:49:21 AM »
Dave,
That Wallaby gives you time to think about the 917. Poor Wallaby relegated to distraction while you figure out the flat 12.
Art
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Offline steamer

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Re: 917 180 degree V 12
« Reply #134 on: July 13, 2016, 04:10:16 AM »
Dave,
That Wallaby gives you time to think about the 917. Poor Wallaby relegated to distraction while you figure out the flat 12.
Art

Well ......Life in the big city......
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

 

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