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Author Topic: Scott Vacuum Engine......  (Read 107490 times)

Offline Stilldrillin

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Re: Scott Vacuum Engine......
« Reply #75 on: February 17, 2015, 08:46:25 AM »
Quote from: vtsteam on February 17, 2015, 08:38:56 AM
It's great to follow along with each of your improvements, David!

I also like your first picture -- naturally, I think it would make a fine avatar..... :)

Thanks Steve!  :thumbup:

Hmmm..... Naturally, yes! I've been thinking of updating, recently.  :smart:

David D
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

RobWilson

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Re: Scott Vacuum Engine......
« Reply #76 on: February 17, 2015, 02:57:49 PM »
Quote from: fcheslop on February 13, 2015, 09:54:55 AM
Ah so that answers a question.
Very nice casting :thumbup:
http://i981.photobucket.com/albums/ae299/frazerheslop/lever%20engine%20finished/huibsleverenginefinished004_zps6756e83c.jpgScott Vacuum Engine......
Nice going marra.Have you sussed out tuther leg??
cheers
frazer


Now thats a nice looking fly wheel  :lol: :lol: , were there any blow holes in it ?   


The engine looks a cracker to  :clap: :clap: :clap:




Rob
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Offline Stilldrillin

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Re: Scott Vacuum Engine......
« Reply #77 on: February 17, 2015, 05:49:07 PM »
I finally made my mind up. There's no turning back, now!   :palm:

It has to be, twin pedestals, and flywheels.........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150217_145511182_zpsfwbyjnnu.jpgScott Vacuum Engine......


David D
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline Stilldrillin

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Re: Scott Vacuum Engine......
« Reply #78 on: March 07, 2015, 04:54:46 AM »
Slow, steady progress........

Cleaned up the casting, in the single pedestal area.

Marked out for crankshaft centre line, and two base pads.......

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150218_150838704_HDR_zps9tyootro.jpgScott Vacuum Engine......


Milled .03" deep pockets........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150220_125905228_HDR_zpsi3rkhnx3.jpgScott Vacuum Engine......


Two steel pads. Fitting snugly, in the pockets, also doweled........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150223_145819322_zpsccp4iduv.jpgScott Vacuum Engine......


Glued with sleevelock. Milled to match each other........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150224_113217038_HDR_zpsfoo4xwhq.jpgScott Vacuum Engine......


Two 25mm square columns. Held with m6 c/sunk screws and dowels.

Drilled.........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150227_145129888_zpsoxvesura.jpgScott Vacuum Engine......


Reamed, 13mm........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150303_143822413_zps8rzqhw7v.jpgScott Vacuum Engine......


Angled the column sides.......

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150304_150534925_HDR_zpszcqn39t8.jpgScott Vacuum Engine......


Radiused.........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150306_144445153_zps5c7m1zka.jpgScott Vacuum Engine......


How it all fits together........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150306_155037446_zpsmagyaefy.jpgScott Vacuum Engine......


A quick spruce up, of the flywheels. Increased the diameter of the bosses........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150307_091408300_zpsj9rrqzms.jpgScott Vacuum Engine......



Thanks for looking in!

David D
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline fcheslop

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Re: Scott Vacuum Engine......
« Reply #79 on: March 11, 2015, 04:38:35 PM »
Ah she looking canny marra, by eck you like a challenge
Not much done this end apart from a rear tool post to remind me why I dont like hacksawing 2" square steel
Hi Rob, no probs machining the flywheel. A really nice bit of casting  :thumbup: Chuffed to bits with it
cheers
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Offline Manxmodder

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Re: Scott Vacuum Engine......
« Reply #80 on: March 11, 2015, 05:04:51 PM »
David, I somehow missed your latest developments and most recent posts on changes to the flywheel end.

Anyway,yes she's definitely gonna be a prettier looking engine with the double flywheels.

 Nice work ......OZ. :clap: :clap:
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Offline Stilldrillin

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Re: Scott Vacuum Engine......
« Reply #81 on: March 17, 2015, 04:18:49 PM »
Frazer, OZ.

Much appreciated. Thanks fellas!  :thumbup:



I've started work on the crank discs.

Two off, 3" square x 10mm blanks. And aching arms.......

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150309_114412775_zpsna0wnqip.jpgScott Vacuum Engine......


Topped, to 68mm o/d........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150311_105811453_zpszgrqvwdj.jpgScott Vacuum Engine......


Skimmed. Finished at 3/8" thick........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150311_143402585_zpsnrmgxd05.jpgScott Vacuum Engine......


Sleevelocked, sleeves. To increased shaft location length......

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150313_130443914_zpshv5vfqv8.jpgScott Vacuum Engine......


Drilled/ reamed 6mm, for silver steel shaft. Sleeves topped to 8mm dia. No discernible wobble, when spun on shaft.......

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150316_193929528_zpsuyrzmz6t.jpgScott Vacuum Engine......


Time to make 'em look like crank discs!

If I mill away to centre line, as usual, (l/h disc). I guess the assembly would be "over balanced".

The r/h disk seems more, functional.

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150317_164218023_zps0rog0vep.jpgScott Vacuum Engine......


The present c/i piston and rod assembly, weighs 63gms.

Is there a quick n dirty, simple formula. Which I could understand. To calculate how much weight to remove from big end area?

David D
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline tom osselton

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Re: Scott Vacuum Engine......
« Reply #82 on: March 17, 2015, 04:48:24 PM »
You could try this, I bookmarked it last year but have not tryed it out.

http://modelenginenews.org/etw/etw_bal/p2.html
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Offline Stilldrillin

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Re: Scott Vacuum Engine......
« Reply #83 on: March 18, 2015, 07:39:35 AM »
Tom.
Thanks very much! I can work with that. (And the digital kitchen scales).......   :beer:


I've been steadily reducing the flywheel's 1" wide rims. Not wanting to overdo it.......

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150317_132649149_HDR_zpsb7nv7irx.jpgScott Vacuum Engine......


Now, down to 5/8" wide.......

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150318_111343632_zpshzymxnis.jpgScott Vacuum Engine......




http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150318_111405820_zps2stkn10u.jpgScott Vacuum Engine......




http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150318_111436991_zpsfjtu4vga.jpgScott Vacuum Engine......


I think they look about right. Anyone care to comment?

I can still take more off.........  :thumbup:

David D
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline Manxmodder

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Re: Scott Vacuum Engine......
« Reply #84 on: March 18, 2015, 08:45:29 AM »
David,massive improvement,they look tremendous.  :clap: :clap:

Proportionally to the rest of the engine they look grand,but also I think if they're thinned down any further you may start to loose the depth proportion of the radius on the cast section of the rim webs.

It's your decision but I think she'll look mighty when the crank is in and the flywheel centres are painted.

Looking forward to the next installation. :thumbup:.......OZ.
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Offline vtsteam

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Re: Scott Vacuum Engine......
« Reply #85 on: March 18, 2015, 11:18:17 AM »
Really nice David! :clap: :clap: :clap: :beer:
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Offline Stilldrillin

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Re: Scott Vacuum Engine......
« Reply #86 on: March 26, 2015, 06:57:49 PM »
OZ, Steve.
Thanks for your kind comments!  :beer:


"Miliputtyed", where necessary, and sanded/ carved back........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150323_150932719_zpsy7vm8va9.jpgScott Vacuum Engine......


A fuff of paint.......

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150325_143821165_zps6fqg7iif.jpgScott Vacuum Engine......


And, a tidy.......

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150326_114339560_zpsagjiuopt.jpgScott Vacuum Engine......


I think the rim, still needs a bit off the width. And the sidewall depth reducing a little.

David D
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline kuutiopää

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Re: Scott Vacuum Engine......
« Reply #87 on: March 27, 2015, 06:13:45 AM »
Beutiful flywheels and overall nice work!

Cheers,
Jami
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Offline Zadig

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Re: Scott Vacuum Engine......
« Reply #88 on: March 27, 2015, 07:14:12 AM »
I agree, lovely workmanship.
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Offline fcheslop

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Re: Scott Vacuum Engine......
« Reply #89 on: March 27, 2015, 07:26:02 AM »
Looks good to me
cheers
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Offline Stilldrillin

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Re: Scott Vacuum Engine......
« Reply #90 on: April 03, 2015, 04:04:25 PM »
Jami, Zadig, Frazer.

Thanks Fellas!  :thumbup:


I decided, it was time to drill n tap the flywheels, for m3 grubscrews........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150403_131928433_HDR_zps3yoa7dhc.jpgScott Vacuum Engine......


Trying the silver steel shaft, afterwards, it stuck, solid. 

The only way to part, the parts, was to drill through........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150403_130936785_HDR_zpsgn6gqe6e.jpgScott Vacuum Engine......


http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150403_131308932_HDR_zpso1rzzvxw.jpgScott Vacuum Engine......


Then drill 8mm dia, and sleeve back, with mild steel insert.

This is not the first time, this has happened to me. I hope it is the last. 

I can't get over, how tightly the alloy gripped the silver steel. Despite the fact, they were first fitted, some 3 weeks ago. And, have been taken apart/ assembled, more times than a Lego set!

Is there some unwritten rule. "No alloy sleeve, onto silver steel shafts"?  :scratch:

From a rather miffed, David D
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Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline vtsteam

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Re: Scott Vacuum Engine......
« Reply #91 on: April 03, 2015, 08:10:42 PM »
Only happens David if you paint a part up real pretty!

Never, ever, ever, ever  paint until done,

or it angers.......... the GREMLINS  :wack: :zap:  :poke: :whip:  
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I love it when a Plan B comes together!
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"www.youtube.com/watch?v=4sDubB0-REg"

Offline Jonfb64

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Re: Scott Vacuum Engine......
« Reply #92 on: April 04, 2015, 04:06:22 AM »
I agree with Steve.

It's the same with anything electronic, it will work fine out of the box all day but as soon as it's  back together it will fail.

 :zap:
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RobWilson

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Re: Scott Vacuum Engine......
« Reply #93 on: April 04, 2015, 04:10:15 AM »
Looking great as always David , Its going to be a fine looking engine when done .  :clap: :clap:





Rob
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Offline Stilldrillin

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Re: Scott Vacuum Engine......
« Reply #94 on: April 04, 2015, 04:13:32 AM »
Steve, Jon.
So true, so blummin' true!  :palm:

Frankly, I blame Mr, Wilson's, Newcastle gremlins. They must be hiding inside the castings.  :scratch:

The last time it happened, was with this pair........

http://i110.photobucket.com/albums/n95/Dayjo/Return%20Album/P1030639_zps14fc1604.jpgScott Vacuum Engine......



Quote from: RobWilson on April 04, 2015, 04:10:15 AM
Looking great as always David , Its going to be a fine looking engine when done .  :clap: :clap:
Rob

I was just typing about you, Rob! Thanks, Mate! :thumbup:

David D
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline fcheslop

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Re: Scott Vacuum Engine......
« Reply #95 on: April 04, 2015, 01:44:40 PM »
Nowt wrong with Geordie castings marra must be the pollution down int Derbyshire
 :D
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Offline Stilldrillin

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Re: Scott Vacuum Engine......
« Reply #96 on: April 09, 2015, 03:21:48 PM »
Dunno about pollution, Frazer.
I reckon it was coffee grounds............ 



Finished the re sleeving. All went well........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150406_114337003_zpsyzqa6mzo.jpgScott Vacuum Engine......



I decided to house the bearings, inside the flywheels.

Opened out with end mills, in 2mm steps.......

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150323_112136187_zpsmt4quk48.jpgScott Vacuum Engine......


Final pass, with 13mm slot drill, 5.5mm deep.........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150325_142257385_HDR_zpsmb7zdbd6.jpgScott Vacuum Engine......


Should be a nice shove in fit, probably..........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150326_103749687_zpsry0llhua.jpgScott Vacuum Engine......


Sandwiched the cam, between two 5mm thick cast iron discs. Drilled & tapped m3. All held with sleevelock........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150326_104141994_HDR_zpscjnjckxf.jpgScott Vacuum Engine......


Slips in here, nicely. Plugged the grub screw hole, with it's annoying click........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150409_085052708_HDR_zpsm9j84tjj.jpgScott Vacuum Engine......


A bit of clearance, here........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150407_114449586_zpsuyu7eqci.jpgScott Vacuum Engine......


And there........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150407_114541474_zpsku2tugir.jpgScott Vacuum Engine......


Screwed it all together. First flick, away it went!  :bugeye:

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150408_175022862_zpsx8mdbfcb.jpgScott Vacuum Engine......


And the video. Cos, I know someone will ask.........



It's now in lots of pieces, for final finishing and assembly.........

http://i110.photobucket.com/albums/n95/Dayjo/2015%20Onward/IMG_20150409_190338788_zpsuczao1up.jpgScott Vacuum Engine......


Thanks for looking in! 

David D



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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline fcheslop

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Re: Scott Vacuum Engine......
« Reply #97 on: April 09, 2015, 03:29:26 PM »
Nice work marra :bow:
No coffee grounds up here the quacks have banned me from drinking the filthy stuff anymore :D just have to stick with the malt.
Cheers
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Offline vtsteam

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Re: Scott Vacuum Engine......
« Reply #98 on: April 10, 2015, 11:42:38 AM »
Oh that looks really nice running David! Can't wait to see it finished....... :coffee: :thumbup:
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I love it when a Plan B comes together!
Steve
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Offline spuddevans

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Re: Scott Vacuum Engine......
« Reply #99 on: April 10, 2015, 11:52:09 AM »
That runs really nice!  :thumbup: :thumbup: :thumbup:


Tim
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