Author Topic: Triumph 650 Twin Engine  (Read 28590 times)

Offline Roger B

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Re: Triumph 650 Twin Engine
« Reply #45 on: May 10, 2017, 03:35:27 PM »
Looks excellent  :praise2:  :praise2: That's a lot of swarf to make  ::)
Best regards

Roger

Offline Vixen

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Re: Triumph 650 Twin Engine
« Reply #46 on: May 10, 2017, 09:07:38 PM »
Mike
That's a  mighty impressive crankcase coming together.
Great bit of MMR (Massive Metal Removal).
Makes you wonder how they ever got that mountain of chips into that relatively small billet in the first place.

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Art K

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Re: Triumph 650 Twin Engine
« Reply #47 on: May 11, 2017, 02:13:18 AM »
Mike,
I'm with everyone else, your work is phenomenal.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline 90LX_Notch

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Re: Triumph 650 Twin Engine
« Reply #48 on: May 11, 2017, 02:25:57 AM »
As stated above, impressive and phenomenal.

-Bob
Proud Member of MEM

My Engine Videos on YouTube-
http://www.youtube.com/user/Notch90usa/videos

Offline mikemill

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Re: Triumph 650 Twin Engine
« Reply #49 on: May 11, 2017, 09:22:40 AM »
Thanks for the encouraging remarks, on with the quest.

Mike

Offline Zephyrin

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Re: Triumph 650 Twin Engine
« Reply #50 on: May 11, 2017, 10:34:41 AM »
Lot of impressive work, great project and clever setups, wow, that is a thread !

Offline mikemill

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Re: Triumph 650 Twin Engine
« Reply #51 on: May 18, 2017, 10:50:09 AM »
Progress on the 650 Twin, I made a cradle to hold the crank case stable, I had some 15mm steel tube in the junk box and silver soldered some plates to match the centres of the mounting holes of the case. The timing case base was machined out of 1/2in ali and the front from 7/8in thick ali, I had thought of making a rounding off cutter until I realised I had a wood router cutter that has tungsten carbide blades which will cut ali if run at high speed and slow feed and worked well. The next task is the timing gears.

Mike

Offline mikemill

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Re: Triumph 650 Twin Engine
« Reply #52 on: May 22, 2017, 01:07:03 PM »
I chose cast iron for the timing gear material as it is friendlier to the cutters than steel; I had a set of 32DP cutters and that size suited the space in the gear case.
Once the dividing head and cutter centres are set up it’s a strait forward job to cut the gears 3x40T and one 20T, and much to my relief they mesh well.

Mike
« Last Edit: May 23, 2017, 09:06:29 AM by mikemill »

Online Admiral_dk

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Re: Triumph 650 Twin Engine
« Reply #53 on: May 22, 2017, 09:16:21 PM »
What can I say - it looks like it ends up as a true masterpiece  :NotWorthy:

Offline mikemill

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Re: Triumph 650 Twin Engine
« Reply #54 on: May 24, 2017, 04:32:05 PM »
Thanks for your comments Admiral.

There have been volumes written on cam design over the years; but for basic principles I have gone for a slight curve between the base circle and the nose, and a wider nose for the exhaust to allow more dwell to let out the exhaust gases out.
I have used mild steel which will be case hardened.

Mike

Offline pp2076

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Re: Triumph 650 Twin Engine
« Reply #55 on: July 11, 2017, 02:11:31 AM »
.
Fantastic project.  :)

Have you seen this.

<a href="https://www.youtube.com/watch?v=zLhtDPkX5kw" target="_blank">http://www.youtube.com/watch?v=zLhtDPkX5kw</a>


Nick
That's not a Bonneville engine! Not an oil leak in sight  :ROFL:

Offline mikemill

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Re: Triumph 650 Twin Engine
« Reply #56 on: July 11, 2017, 09:52:54 AM »
She who must be obeyed has pulled rank, am refurbishing wooden greenhouse and painting outside windows, while trying to think through the machining process for the cylinder head!!!! Hay Ho

Mike


Offline mikemill

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Re: Triumph 650 Twin Engine
« Reply #57 on: August 02, 2017, 05:42:50 PM »
Domestic duties complete back on the job. The first stages of the cylinder head, there are many machining operations involved, here are some of them.

1)   Cutting the basic shape from a 40mm thick billet
2)   Cutting the holes for the valve liners
3)   The head turned over with the holes were the valve spring sit
4)   Tapping the holes for spark plugs

Mike

Offline Vixen

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Re: Triumph 650 Twin Engine
« Reply #58 on: August 02, 2017, 06:22:57 PM »
Looking very good Mike.  :ThumbsUp: :ThumbsUp: :ThumbsUp: :ThumbsUp: :ThumbsUp:

have you noticed how reluctant you get to make the next or final cuts after so much work. 'Measure twice, cut once' does not come into it. It's measure, check, measure again, recheck and so on.

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Art K

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Re: Triumph 650 Twin Engine
« Reply #59 on: August 03, 2017, 03:34:03 AM »
Mike,
I really like this build but, it makes me want to do one of my R90S. looks great!
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

 

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