Author Topic: Yet another paddleducks engine build (Read 36657 times)

boatmadman · « **on:** February 14, 2010, 04:13:41 PM »

I thought it was about time I put my mill to good use, so, after looking around and reading various threads I decided on a Bogstandard engine build.

So, downloaded the files, gave them a coat of looking at and, following his instructions as closely as possible, set to.....

with one exception, he recommends making a spare every time you machine something - so I am doing, but in this case its a complete spare engine!

My theory is, if I get a 50% success rate I will have one workable

engine!

Anyway, this pic shows cylinder blocks in CI, pistons and rods, top covers and bottom glands. Also is one brass block machined square for a crosshead, others not done yet. (the line on the block is a machine mark - to be polished out later)

Ian

sbwhart · « **Reply #1 on:** February 14, 2010, 05:12:08 PM »

Nice work Ian

I'm sure Bogs will be pleased to hear another engine is on the slipway.

Have fun

Stew

spuddevans · « **Reply #2 on:** February 15, 2010, 01:51:31 AM »

Looking good there Ian

that's a real good start made.

My paddleducks build has had a temporary halt called as a more urgent project came up ( redecorating & laying a new floor in the living room ), but I hope to get back to it soon.

Tim

Stilldrillin · « **Reply #3 on:** February 15, 2010, 03:24:17 AM »

You`ve got that away to a good start Ian!

Good luck with the rest of the build.....

David D

boatmadman · « **Reply #4 on:** February 18, 2010, 04:41:52 PM »

Can anyone suggest what grade of aluminium I should use for the block base plate, and where I might get it?

Thanks

Ian

CrewCab · « **Reply #5 on:** February 18, 2010, 05:22:27 PM »

Hi Ian,
Glad to her your putting the mill to good use

............. as for aluminium mine often comes from Fleabay and is usually specified by price rather than grade

I'm sure someone will be along with a sensible answer before long

CC

spuddevans · « **Reply #6 on:** February 18, 2010, 05:33:04 PM »

Quote from: boatmadman on February 18, 2010, 04:41:52 PM

Can anyone suggest what grade of aluminium I should use for the block base plate, and where I might get it?

Thanks

Ian

I cant comment on what grade, but on thickness I asked about the same thing and got told This

Tim

Bluechip · « **Reply #7 on:** February 18, 2010, 06:20:50 PM »

Ian

In case it's any help, I have some 15mm thick 6082T6 which mills very well. ( I only know this 'cos it's printed on it ).

Afraid I don't know where to get it from, as I scrounged it some time ago.

I have some other Ally which is awful stuff, so there are probably some specs. that are not very suitable for machining.

Dave BC

Bernd · « **Reply #8 on:** February 18, 2010, 09:13:58 PM »

6061 T6 is common around here. Then there is a plate called jig plate which is a softer grade of aluminum, 2024 I believe. Then there is the harder stuff 50 something or other. I know it don't help much, but I'd used 6061 since I have quite a bit of it. Unfortunatley it's in the USA.

Bernd

AdeV · « **Reply #9 on:** February 19, 2010, 03:36:13 AM »

Here's some basic info about aluminium grades, and a the machinability of some of them at least: http://www.merseymetals.co.uk/aluminium.html

I can also tell you that N8 seems to machine quite well, as that's what I've got tons of at the moment...

boatmadman · « **Reply #10 on:** February 19, 2010, 07:59:02 AM »

Great stuff, thanks for the help.

Bernd · « **Reply #11 on:** February 19, 2010, 09:18:54 AM »

Interresting specs. They say international, yet I don't see a spec for 6061 plate.

I've attached a pic of the 1/4" plate I have. It's just for point of interest.
Bernd

AdeV · « **Reply #12 on:** February 19, 2010, 10:36:39 AM »

Bernd - I believe 6061 is an ISO designation; but 6063 - I was told when I spoke to Mersey Metals last - supercedes 6062 which, in turn, superceded 6061. I presume the formulations are very subtly different, but I can't tell for sure.

If you want, I can ask a specific question or two of them on Monday, when I go to pick up a bit of steel I've ordered.

Bluechip · « **Reply #13 on:** February 19, 2010, 11:10:59 AM »

Good grief, what's up with you lot ..

Took me about 30 secs. to find this ... not that I have any real interest ..

http://aluminium.matter.org.uk/aluselect/05_fabrication_browse.asp

I've selected the stuff I have on the LH column. sez 6082T6 is 'good' for machinability ..

Dave BC

boatmadman · « **Reply #14 on:** February 21, 2010, 12:55:04 PM »

Managed to get a few hours in the workshop today. Spent 2 hrs figuring out how to mill a radius using the dro, then realised I wasnt taking into account the dia of the tool DOH!

Had one misshap, fortunately, no damage to the mill or tool, just some dints on the work piece oh and I escaped injury!

What happened, got my climb milling and conventional milling mixed up. Ripped the brass out of the vice and sent it across the workshop - lesson learnt! ( it was only a 0.2mm cut as well!)

Anyway, the pics show some brass hacked out of a length of round bar, first into rectangular blocks, and then into 2 croosheads - only 2 more to make now

Bernd · « **Reply #15 on:** February 21, 2010, 12:58:22 PM »

Ian,

Hey we all make mistakes. Just hope you learned from it.

Looks like your progressing along quite well. Wouldn't it be neat if you got both engines to run?

Keep up the good work.

Bernd

boatmadman · « **Reply #16 on:** April 03, 2010, 04:34:49 PM »

I got a day in the workshop today, so thought some steam engine work was in order.

I started out with a length of bronze as you see in the first picture, and after several hours of hacking, sawing, swearing, filing and drinking coffee, I ended up with the items in the second picture. These are the bearings for the engines, they are not quite finished yet, they need a cosmetic cut just to make them prettier.

Ian

Bernd · « **Reply #17 on:** April 03, 2010, 09:20:25 PM »

Wow Ian. I'm going to have to try those five things you mentioned above and see if I can turn out such nice work.

Bernd

dsquire · « **Reply #18 on:** April 03, 2010, 09:41:23 PM »

Ian

I don't know what kind of coffee you are drinking but I know that I want some! Mine sure doesn't give results like that.

Cheers

Don

spuddevans · « **Reply #19 on:** April 04, 2010, 02:29:40 AM »

Hey hey, very nice work there

Keep up the good work.

Tim

NickG · « **Reply #20 on:** April 08, 2010, 06:20:56 AM »

Yep, nice work Ian. I had the pleasure of visiting Bogs a couple of weeks ago and he showed me this engine running - very nice.

Nick

boatmadman · « **Reply #21 on:** April 20, 2010, 03:50:22 PM »

Ok Fella's, I need advice.

Today I got some brass 2mm sheet for the bedplates, and a new toy, a slitting saw and arbor.

Now, having never used a slitting saw, can I grip the sheet in my vice and cut off a piece the size I want, holding it with, say, a pair of pliers as the cut finishes?

Or, if thats a no no, what do I do?

Ian

madjackghengis · « **Reply #22 on:** April 22, 2010, 09:29:38 AM »

Boatmadman, I have often been accused of being a bit lackadasical in the safety department, but I have done what you describe, only using fingers to hold the piece being cut off. I wouldn't do it with steel particularly stainless, however for brass, I'd have no qualms, but I do have lots of scars on my hands, and my mother shakes her head and never wants to hear. It will do a bang up job cutting off a piece of sheet with parallel edges, and without distortion along the cut, something of inestimable value with brass. I don't know what you have for an arbor, but I have avoided multiple size arbors like the plague, not trusting in them keeping the slitting saw flat and tightly held, but have made a separate arbor for each size I need. For what it's worth, that's my take.

mad jack

boatmadman · « **Reply #23 on:** April 24, 2010, 04:03:16 PM »

I gave the bearings a nice cosmetic cut today, the first pic shows them with a set of crank web blanks.

The second pic shows one set of ten webs almost finished.

Ian

Brass_Machine · « **Reply #24 on:** April 24, 2010, 06:36:45 PM »

Nice work so far Ian. I am impressed. Very nice

Eric

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Author Topic: Yet another paddleducks engine build (Read 36657 times)