Author Topic: Scott Vacuum Engine...... (Read 77882 times)

Stilldrillin · « **Reply #100 on:** April 10, 2015, 02:31:51 PM »

Frazer, Steve, Tim.
Thanks for your kind comments chaps!

Today, was sprayday..........

For anyone like me, with disobedient fingers/ hands. I can recommend the cheap pistol grip. Works a treat!

This was how it looked, at knock off........

Thanks for looking in!

David D

Stilldrillin · « **Reply #101 on:** April 20, 2015, 02:55:35 PM »

More, gentle progress.

The original clevis, was ok for length, but, not easily adaptable for a graphite piston.
I like to have a spigot, with a flange either side of the piston crown.

So, I chopped off the end of the rod, and re drilled.......

There's a new piston, hiding inside this generous lump. Thanks, Andrew!

And....... Yer tiz........

Balance time. Piston end........

Big end........

Couldn't make up me mind, which was the best way to lose, only 12gms per disc.

In the end, I went for slots........

Non too bad, I think........

Thanks for looking in!

David D

vtsteam · « **Reply #102 on:** April 20, 2015, 04:42:16 PM »

Very nice David

. And it truly was a generous lump from Andrew!

awemawson · « **Reply #103 on:** April 20, 2015, 04:45:15 PM »

Glad to see it used David. I stashed that away DECADES ago

Manxmodder · « **Reply #104 on:** April 20, 2015, 05:23:38 PM »

I wondered when the graphite piston would appear. Very nice it looks too

.

If memory serves me right the original bore was 1 5/16" (1.3125"). What size are we at now,David?

.....OZ.

Stilldrillin · « **Reply #105 on:** April 20, 2015, 05:43:20 PM »

Quote from: vtsteam on April 20, 2015, 04:42:16 PM

Very nice David . And it truly was a generous lump from Andrew!

Thanks Steve.

It certainly was!

Quote from: awemawson on April 20, 2015, 04:45:15 PM

Glad to see it used David. I stashed that away DECADES ago

Hi Andrew.
I've had it maturing, on top of the wardrobe, since November.

It was a real pleasure to machine. Cutting very sweetly.
The final thou', was very easily controlled. Using the usual 6" rule, and 2000 grit wet n dry........

Quote from: Manxmodder on April 20, 2015, 05:23:38 PM

I wondered when the graphite piston would appear. Very nice it looks too .

If memory serves me right the original bore was 1 5/16" (1.3125"). What size are we at now,David?

.....OZ.

Hi OZ.
Thanks!

Not exactly sure on dia, as it was a hand rubbed final finish. Not far from 1.295".

Thanks for all your interest, Chaps!

David D

Stilldrillin · « **Reply #106 on:** April 22, 2015, 05:44:41 AM »

I finished off the crank assembly, yesterday. Test run went ok.

At the other end. The 5 thou thick shutter, runs in a 25 thou deep recess. I thought it was rather a sloppy fit.

So, I milled off 10 thou, best I could, then polished the face, on a flat surface.......

It's now, gone from a popper....... To a quacker........

A blummin LOUD quacker!

Sheesh........

David D

Bluechip · « **Reply #107 on:** April 22, 2015, 05:51:20 AM »

Wow!! That's a cracker of a quacker ....

I like it lots ......

Just what they should do ..

Dave

Stilldrillin · « **Reply #108 on:** April 22, 2015, 05:56:37 AM »

Quote from: Bluechip on April 22, 2015, 05:51:20 AM

Wow!! That's a cracker of a quacker ....

I like it lots ......

Just what they should do ..

Dave

Thanks, Dave!

I'll wait n see, what others think...........

So loud. It hurts me tabs.

And, as you know. I'm deaf........

David D

awemawson · « **Reply #109 on:** April 22, 2015, 05:57:51 AM »

Running nicely David

Meldonmech · « **Reply #110 on:** April 22, 2015, 07:45:56 AM »

Some fine mods you have made there David, and the visual improvements adding the extra wheel are great. Not sure I would like to work alongside the quacking all day, but it's tolerable for the video. Think I prefer the popper.

Well Done
Cheers David

Stilldrillin · « **Reply #111 on:** April 25, 2015, 05:36:58 PM »

Andrew, David.
Thanks Chaps!

Not too much to show, for this week. But....... I've almost finished the final build!

I'm making several mods, and upgrades as I go along.

Before finally sealing the cylinder into the hopper, the bore caught my eye. All that time spent honing, was worth it........

Seven ball races, in the crank assembly. The fixed crankpin, links the two halves together.........

Then, the whole assembly is held by two countersunk M6 screws......

Building a bit. Test running a bit........ I'm pleased to report, the duck has flown! Normal popping has returned........

Thanks for looking in!

David D

Manxmodder · « **Reply #112 on:** April 25, 2015, 06:00:42 PM »

David, the bore is a fine sight indeed. I'm glad to hear the duck has flown,I far prefer the popping sound to a farting one.....OZ.

sbwhart · « **Reply #113 on:** April 26, 2015, 02:59:10 AM »

Quote from: Stilldrillin on April 25, 2015, 05:36:58 PM

I'm pleased to report, the duck has flown! Normal popping has returned........

Thanks for looking in!

David D

Are your sure you didn't eat it ------------------------------ Crispy Duck Maybe

.

Cracking work Dave the cylinder looks extreamy well finished can't wait for the final run video a bet it will break a few records.

Stew

Stilldrillin · « **Reply #114 on:** April 27, 2015, 05:34:47 PM »

Thanks, OZ. Me too!

Stew. I never question, Mrs. Drillin's cooking........

I'm doing the fiddly, finishing, faffing about, at the moment.

Rolled up a pair of stainless mesh, wicks. Action photo........

The finishing line is in sight!

Thanks for looking in.

David D

Stilldrillin · « **Reply #115 on:** April 30, 2015, 03:14:16 PM »

It's finally finished!!

An overcast/ bright, day. Perfect for the final pics and video, on the tartan, in my greenhouse.

Started up, in the workshop. Running faultlessly.

Filled with coolant. No surface ripples. So, crank must be balanced ok. Life is good........

Then, I noticed the spreading puddle of coolant, from the rear of hopper!

Time for another stripdown.....

You were right, Young Frazer. The Hylomar has rolled out of the groove, on assembly!

Also. The c/i cylinder is rusting, already.......

So, I've ordered some O rings.......

David D

millwright · « **Reply #116 on:** April 30, 2015, 03:38:32 PM »

Sunds a lot better now David, Had to turn hearing aids down for the quacker. Shame about the coolant leak hope the o rings will sort it Without too much extra work.

John

vtsteam · « **Reply #117 on:** April 30, 2015, 09:53:56 PM »

Oh, man!!

Looks beautiful in the video, though, and a very impressive runner! I'm sure you'll have the last hiccup fixed in your usual fine style, David.

fcheslop · « **Reply #118 on:** May 01, 2015, 04:38:09 AM »

Sorry I was right .
I know Iv some of them O ring thingy ma bobs but finding them

One day I may become organised so much junk
Weve a runner on that new displacer idea

although still a bit to do
Good luck and see you at hairygate marra
frazer

Manxmodder · « **Reply #119 on:** May 02, 2015, 01:12:44 PM »

Hi David, that is now a lovely looking engine with all your mods and the extra flywheel,and it runs very sweetly too. The water leak is a minor hiccup,sure you'll soon sort that out.

I am surprised to see the level of pitting and corrosion on the iron liner,maybe distilled or purified water would help.....OZ.

lordedmond · « **Reply #120 on:** May 03, 2015, 04:01:41 AM »

OZ

Distilled water would be far worse in the corrosion stats .

As it's been depleted of is mineral content all it want to do is get them back , that's why it's know as the universal solvent . Also do not drink it it will leach the minerals from gut .

It is a insulator as far as electricity is concerned ,they use it to wash down live HV glass insulators.

David why not use nest antifreeze as a coolant it has inhibitors in it to prevent corrosion

Great build

Stuart

Stilldrillin · « **Reply #121 on:** May 13, 2015, 03:57:30 AM »

Thanks for all your comments Chaps!

Stuart.
I used Bluecol top up mix, in my Robinson engine. It rusted, immediately!

The O ring idea, didn't work. Leaked, again........

So, I filled the groove with Hylomar. Then wrapped around with thick cotton. To fill the groove a little proud.
Then applied more Hylomar, once it was through the first bore, before entering it into the rear one.

It worked........

Now, using coolant mix, at 10/1. No rust, so far........

Well........ It's finally finished!

The sun was shining too brightly for the camera. The actual colour is Ford burgundy......

The duck, is in there, somewhere. The wind was a nuisance, too.......

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Thanks for following along!

David D

DMIOM · « **Reply #122 on:** May 13, 2015, 04:52:36 AM »

Really impressed to see her running outdoors, and can't really do any better than than to say "hear hear" to your final comment on the clip "Job's a good 'un"

Dave (IOM)

awemawson · « **Reply #123 on:** May 13, 2015, 07:17:53 AM »

Excellent David - runs very sweetly

I do have a 6" diameter chunk of graphite, so how about a full size engine .......

Manxmodder · « **Reply #124 on:** May 13, 2015, 09:06:46 AM »

Lovely job,David

. I'm glad it's turned out so well,it has been a really interesting thread to follow.

Hope you've got another orphan restoration lined up for us soon.....OZ.

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Author Topic: Scott Vacuum Engine...... (Read 77882 times)

lordedmond