Author Topic: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine  (Read 28129 times)

Offline sshire

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #30 on: September 08, 2015, 08:28:30 PM »
Bill
Thanks. After using the files and the abrasive sticks (tedious) I ordered the Cratex "Introductory Kit." BTW, best price was Midway (gunsmith supplies.) Various shapes and mandrels in all 4 grits. Those in the Foredom hand piece made pretty quick work of leveling out the surface. I did finish with a 400 grit Borite stick and honing oil then the 60  and smaller micron Scotch-Brite wheels on the Foredom Bench Polisher.
Best,
Stan

Offline b.lindsey

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #31 on: September 08, 2015, 09:20:44 PM »
That is a lot of work Stan and both sides of each side plate right? Even with the Foredom that would be tedious but the results look great.

Bill

Offline sshire

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #32 on: September 08, 2015, 09:27:12 PM »
Yes. Four sides. It won't halt progress as the finish doesn't impact anything.
Best,
Stan

Offline Tennessee Whiskey

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #33 on: September 08, 2015, 10:36:38 PM »
Good Lord, that thing has more curves than Jennifer Lopez :mischief:. Vern, that's some sweet metal carving  :ThumbsUp:. I guess the ProTrac would be a lot faster, but, you can buy a bunch of Craytex for that many duckies.  However,  a man of your stature and means might should be the first on the forum to break one out :stir: :stir:. I'm liking the sound of black and polished brass. Now, just out of curiosity,  what style of milling cutter did you employ ?

Cletus


Offline sshire

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #34 on: September 08, 2015, 10:45:23 PM »
Thank you, Cletus

Inside cuts all with 1/4" 3-flute carbide radiused (.0625 radius) center-cutting end mill.
Outside: 3 flute 1/4" straight center cutting end mill.
The BP was cranked up as fast as it would go (3,000+ rpm) which was slower than the RPM calculations.
Plenty of Cool Tool fluid. (My fluid dujour)

Actually, Scott Nelson (Cheepo45) has Protrak Bridgies at the U of Delaware Engineering shop. Along with a cherry HLV-H and a FULL set of 5C collets (fractional, number and letter)
Vern
Best,
Stan

Offline Tennessee Whiskey

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #35 on: September 08, 2015, 10:49:59 PM »
Why your welcome Vern. Now, if I may;  with what process do you administer Kool Tool to keep your tool cool  :shrug:

Cletus

Offline sshire

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #36 on: September 08, 2015, 11:00:52 PM »
Lab wash bottle and acid brush
Best,
Stan

Offline Tennessee Whiskey

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #37 on: September 08, 2015, 11:44:35 PM »
I sure am enjoying my 1 gallon KoolMist system.

Cletus

Offline Don1966

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #38 on: September 09, 2015, 12:02:04 AM »
Stan I think we're going to call you " Cool Hand Luke", that is just to cool buddy. You just keep coming up with great results.......... :ThumbsUp: Oh! And did I say I........like.......... :Love:

Don

Offline sshire

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #39 on: September 09, 2015, 12:27:54 AM »
Thanks, Don. Only 79 more parts to go.

E
My concern about the Cool Mist was coolant misted all over. How contained is it ?
Best,
Stan

Offline Tennessee Whiskey

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #40 on: September 09, 2015, 12:53:18 AM »
Pretty much from a vapor to a flood or just air

E

Offline Dave Otto

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #41 on: September 09, 2015, 02:08:42 AM »
If it has 3 flutes and cuts to the center is is still a slot drill??  :lolb: :lolb:

Stan your parts (engine parts that is) are looking great!

Dave


Offline sshire

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #42 on: September 09, 2015, 04:18:14 AM »
Parts? Wait until you see my nuts :lolb:

I still am not understanding the "advantage" of a non-center-cutting end mill.

Slotting drill?  :thinking:
Best,
Stan

Online Jo

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #43 on: September 09, 2015, 07:17:55 AM »
I still am not understanding the "advantage" of a non-center-cutting end mill.

Don't worry Stan, I've accepted that it is another lost cause  ::)

And best I don't say anything about your nuts :hellno:

Jo   
Enjoyment is more important than achievement.

Offline sshire

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Re: Lady Godiva Rides Again - Roy Ozouf's Coventry Engine
« Reply #44 on: September 23, 2015, 07:45:43 PM »
Lady Godiva Rides Again - Episode 3
Roy Ozouf’s Coventry Engine


Yes! Another episode.

Since the cylinder pivots from the bottom, the next group of parts begins with the pivot shaft and works upward.

I decided to turn the bronze bushings first and then turn the pivot shaft to fit.

Turned to diameter, then drilled and bored.





Parted off



The pivot shaft was turned to diameter and the ends were turned smaller to fit the bushings.





First, a ⅛” x 2.065” deep hole.



Then larger holes. Finally got to use the small hole gages.



Finally, tapped 3/8”-24.



The drilling and tapping were repeated on the other end of the pivot shaft

The side plates were indexed together using dowel pins in the ⅛” holes and indicated on an angle plate. The feet were leveled as they will be the reference surface for the next operation.



That was in preparation to machining and fitting the bearing caps.



Each bearing cap was rounded on the rotary table.





Since I had left plenty of extra material to clamp the parts on the rotary table, a hogging bit made quick work of removing most of it.



Now, with the side plates oriented correctly, a slot was milled with a center-cutting end mill and the bearing caps were fitted.



Next, the glands for the pivot shaft. Threads single pointed.



Knurling, drilling, reaming and two pieces of Delrin for packing were made.
The family picture of the pivot shaft and associated parts.



And, a family picture of everything to this point.



Now, the pivot block. The rough piece.





The usual operations. Squaring, drilling, reaming, etc.





A test fit with the pivot shaft. It has had two ports and two mounting holes completed off-camera.



Drilling the ports in the pivot block.



Almost finished with the machining





Bottom cylinder cover


The bottom cover is screwed only the pivot block. It is 2” in diameter. Having no 2” brass round in stock, it will be made from ¼” plate.

First milling to thickness.



Then, a ⅛” blind center hole. This will be used after this operation to align the cover with the pivot shaft and block. The holes on either side are to secure it for turning.



A 2.25” aluminum round with a matching set of holes.



With the brass secured to the aluminum, it was indicated in the 4-jaw.



A trepanning bit was used here. Since my brass plate was 2” wide (the diameter of the cover), I began wider and kept moving in until I had a full circle.





The 1” diameter center boss was turned and then the piece was moved to the mill and indicated.



Bolt hole circle, countersunk mounting holes and intake and exhaust holes. The central mounting holes will be plugged.








Best,
Stan