Author Topic: Liney RV-1 - A New Double Wide  (Read 16826 times)

Offline sshire

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Re: Liney RV-1 - A New Double Wide
« Reply #15 on: October 27, 2013, 04:47:07 AM »
Thanks Don. Really appreciate it. I learned much of what I know from forums and hope that I can give back a little.
Best,
Stan

Offline sshire

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Re: Liney RV-1 - A New Double Wide
« Reply #16 on: October 27, 2013, 09:18:44 PM »

Liney RV-1 - A New Double Wide

Part 4

Cylinders


The cylinders ride on the rotary valve. In my 2X version, they start with a 6” brass square bar - 1”x1”.



Off to the bandsaw to cut the piece in half.



Once again, I had to dismount the 5C chuck. The largest square, 5C collet is .75”. The brass is 1”x1”.

Mounted the 4-jaw and clocked the piece in. My plan is to turn the round sections and drill and ream the cylinders for the pistons. At that point, the round part will fit in a 5C collet and I’ll change back to that.



Turned to somewhere near .95” but not a critical dimension as it’s the outside of the cylinder.



If I’m not turning into a shoulder, I would use the tangential toolholder with a round toolbit. This gives a beautiful finish. The finish is not so beautiful here but a bit of fettling (I was dying to get that in) and Scotchbite made it acceptable.





Drilling and reaming the cylinder bore, repeat the whole process for the other cylinder and that finishes the 4-jaw.





Moving to the mill to drill and ream the .5” hole for the rotary valve.



A nice slip fit. Repeat for the other cylinder.



When I was involved with “whistle-mania” a few weeks ago, I made the decorative cap with a carbide wood-router bit. I wanted to make the end of the cylinder round and another carbide router bit was put into a toolholder and did a nice job.





We now leave your regularly scheduled built log so I can watch the football game (remember, the ball with the pointy ends)



Game over.

The cylinder end is drilled and tapped for 6-40 set screws to hold the cylinder to the valve,



Two more parts to add. More polishing to eliminate the final tool marks will come.



Not quite looking like an engine but getting closer.



Pistons tomorrow. Stay tuned.


 
Best,
Stan

Offline b.lindsey

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Re: Liney RV-1 - A New Double Wide
« Reply #17 on: October 27, 2013, 09:49:19 PM »
Another fine update Stan, and a nice result on those cylinders too!!  If you can would you put something in the next round of pics for size comparison. Not complaining at all, just trying to get a feel for how much larger it actually is. You are going to have a lot of new toys for CF  ;D.  And did the game come out to your liking ?

Bill

Offline kellswaterri

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Re: Liney RV-1 - A New Double Wide
« Reply #18 on: October 27, 2013, 10:02:52 PM »
Stan.great idea using the router cutter for a form tool ...

Offline sshire

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Re: Liney RV-1 - A New Double Wide
« Reply #19 on: October 27, 2013, 10:09:23 PM »
Bill
The game was mediocre. That's why I had the single malt. (or, as Arnold calls it "Fine Scottish Produce")

The router bits work fairly well as form tools. I still haven't nailed down the procedure. The one I used for the whistle tops required pretty constant and aggressive feed. This one needed a very light touch. It is way easier than grinding one and at less than $10 on the bargain table at the woodworker's supply.

Best,
Stan

Offline sshire

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Re: Liney RV-1 - A New Double Wide
« Reply #20 on: October 28, 2013, 01:05:31 AM »
Bill
This may help with scale

Best,
Stan

Offline stevehuckss396

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Re: Liney RV-1 - A New Double Wide
« Reply #21 on: October 28, 2013, 01:16:03 AM »
Wow that's alot bigger than I would have thought.
Do not be like the cat who wanted a fish but was afraid to get his paws wet.

Offline b.lindsey

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Re: Liney RV-1 - A New Double Wide
« Reply #22 on: October 28, 2013, 01:19:14 AM »
Yhanks Stan, that helps a lot. Yep...its big....the 1X easily fits in the palm of my hand.

Bill

Offline sshire

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Re: Liney RV-1 - A New Double Wide
« Reply #23 on: October 28, 2013, 08:32:15 PM »
Liney RV-1 - A New Double Wide

Part 5

Pistons


Today's machine porn: the pistons.

The pistons are to fit in the .344 cylinder bore. Started with a stainless square bar; .375”
Initially, I took a cut with my Warner HSS tooling. and wasn’t completely happy with the finish.




I changed to this carbide tool with a really big radius and, with the lathe cranked up to about 1200 rpm, got a better result.



When I got close (.434) I slowly approached a nice fit for the piston. Make a cut, check the fit, move in a half thou, repeat. If I close off the valve hole with my thumb, the piston pops when removed and I can feel the suction. I’ll accept that as a good fit.



Then the usual sequence of spot drill, drill, ream and chamfer for the crank pin holes.





Two more parts in hand for scale.



Here’s where they fit.



Tomorrow, the cranks. Then a few simple bits and the flywheel. I’m thinking about a cast iron outer rim with a press-fit brass center, but that could change.
Best,
Stan

Offline angeloscuro

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Re: Liney RV-1 - A New Double Wide
« Reply #24 on: October 28, 2013, 08:56:13 PM »
My mother spectacular job you work this luxury being envious (healthy of course) luck and encouragement

Offline Tennessee Whiskey

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Re: Liney RV-1 - A New Double Wide
« Reply #25 on: October 28, 2013, 09:57:28 PM »
Yo professor, that's looking ducky. The surface finish is looking spot on for a final finish :cheers:. I think a part a day may keep Zee away :lolb: :lolb:

Whiskey

Offline Don1966

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Re: Liney RV-1 - A New Double Wide
« Reply #26 on: October 28, 2013, 09:58:08 PM »
Stan, what tool is that you are using with the round carbide and who makes them? Also, nice job on the pistons.  :ThumbsUp:

 :cheers: Don

Offline sshire

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Re: Liney RV-1 - A New Double Wide
« Reply #27 on: October 28, 2013, 10:12:31 PM »
I saw the tool on one of Bogs' posts over a year ago. I thing his was a Glanze but I got the same tool under the Garvin brand from Bob Cumings at New England Brass and Tool. It's called a profiling tool and it's been useful for curves, etc.

http://brassandtool.com/Metal-Cutting.html

Eric
Must be working because I've been trying to arrange the quarterly brunch with Zee and a few others from HMEM and we haven't connected yet.

Best,
Stan

Offline Tennessee Whiskey

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Re: Liney RV-1 - A New Double Wide
« Reply #28 on: October 28, 2013, 10:27:16 PM »
Stan, we may all need to check and see if our suds tanks are stinking, he's been quite elusive as of late. :lolb:. I know he and T had the house to themselves for a few days, oh dear, you don't imagine :lolb: :lolb:

Whiskey

Offline b.lindsey

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Re: Liney RV-1 - A New Double Wide
« Reply #29 on: October 28, 2013, 11:36:39 PM »
Remarkable progress Stan. At this rate it should be running by the weekend :)

Bill