Author Topic: Elbow Engine (Read 82038 times)

sbwhart · « **Reply #75 on:** April 01, 2009, 02:59:31 AM »

Thanks Chaps

Steve:- thanks for the tip on sorting the woble

I'll give it a go.

Cheers

Stew

NickG · « **Reply #76 on:** April 01, 2009, 06:18:59 AM »

Stew,

as long as the axis for the hub is concentric and colinear with the outer diameter and the face is perpendicular it might work ... will just run with a wobble .. .I know it looks bad but at least you'll know it runs then you could machine another! I like the composite flywheel but I think i'd machine it from one piece keeping everything tied up! I always try to take the easy option though

Well done, hope you can sort the wobble!

Nick

sbwhart · « **Reply #77 on:** April 04, 2009, 02:20:40 PM »

Well very nearly on the last lap.

Tried Steve,s suggestion for sorting the woble:- set the wheel up in the lathe with a piece of wood in tool post turned the lathe on slow speed and pushed it with the wood and it worked, the woble came out like magic

, thanks Steve, my only worry now is the crack in the hub, will it stand up to the messing about when I assemble the engine:- we will see.

Spent a couple of hours turning bits up to finish it off:- washers, air connectors, plugs for the air pasage ways etc.

One thing I couldn't show you until I striped the base down was how I dowelled the vertical to the base, I simply drilled a couple of 3/32 holes right through the base into the vertical and nocked in a couple of 3/32 dowels this will ensure everything will assemble up dead in line.

Next job was to tidy the base up with a bit of bling, I'm don't like too much bling, I like things to look a bit industrial.

Put a 1/4 rad around the base this was done by clamping a stop, clocked parrallel on the table, then the base was pushed up hard against this stop clamped down, and 1/4 rad end mill fed into the edge the tables zeroed:- next edge set up feed into zero etc etc.

With the vertical it was first marked out, then in the machine vice, the line was leveled to the top of the vice jaw sited up with a parrallel, and skimed up to the line with a fly cutter sorry no pics forgot.

And the top radiused in the RT

All of the bits are know available to start assembling the engine, first job was to clean all the bits of swarf of using white spirit.

The valve ports were assembled first and checked for squareness

The cylinders were measured and the fabricated axle trimmed off to give 0.1 mm float.

Then the required length of the pistons were then measured in the x and y using a hight gauge

The X and Y were within 0.7 of each other I'll make the elbows 36.75mm long.

Well that all for now.

Cheers

Stew

bogstandard · « **Reply #78 on:** April 04, 2009, 03:48:53 PM »

Who's been a busy boy then?

Looks like you are very close to setup now Stew.

You are now approaching the time when most people get too frustrated to carry on, and stick it under the bench.

Only adjust one thing each time, if it doesn't work, put it back to where it was. Otherwise what will happen, you and the engine will get confused.

I doubt if you will need it, but I am only a few minutes away if you get too uptight with it.

Plenty of good lube, even at this stage. Not WD, not enough film strength.

Good luck on your crusade. If you can get this one running, anything else you come across will be a piece of cake.

John

sbwhart · « **Reply #79 on:** April 04, 2009, 04:10:21 PM »

Thanks John

I guess tomorrow will be D day or should that be E day.

Stew

cedge · « **Reply #80 on:** April 04, 2009, 09:06:44 PM »

Stew
It might sound silly, but next time you do a test assembly, Dykem the ends of the pistons and give the cylinders a hand turn or two and then disassemble the engine again. Look a the ends of the pistons and make sure none of the ends are striking the valve plates. If the Dykem has been scratched off, it's hitting the plate. Twice I've encountered this as being a problem with elbow engines. It only takes a slight contact to stop the piston dead in place.

Glad the flywheel trick worked for you. Surprising how quickly it solves that problem.

Steve

sbwhart · « **Reply #81 on:** April 05, 2009, 01:11:29 AM »

Steve

Thanks for the Dykem tip I'll certainly use it.

Cheers

Stew

Stilldrillin · « **Reply #82 on:** April 05, 2009, 02:07:24 AM »

Quote from: sbwhart on April 04, 2009, 04:10:21 PM

Thanks John

I guess tomorrow will be D day or should that be E day.

Stew

GOOD LUCK for today, Stew........

David D

Darren · « **Reply #83 on:** April 05, 2009, 04:30:19 AM »

Yes Stew, we'll all be waiting to see how you get on today.

Good luck

sbwhart · « **Reply #84 on:** April 05, 2009, 04:37:04 AM »

Well got it all assembled Ok turns over lovely by hand no tight spots but won't run on my little compressor not enough wind:- wife suggested as I've always got plenty of wind why don't I :- etc , etc but I think that would be painful

Going round John's this afternoon to try it on his big compressor

Keep your fingers crossed..

Stew

Darren · « **Reply #85 on:** April 05, 2009, 04:38:14 AM »

Firmly crossed

sbwhart · « **Reply #86 on:** April 05, 2009, 12:21:50 PM »

Well this is the assembled Engine

Tried it on my small compressore and it ran out of wind so took it round to Johns to try on his bigger compressore and for John to sprinkle some pixie dust on it.

So I expect you want to know if it runs

?

Yes it does

Happy Bunny, Happy Bunny, Happy Bunny,

Just got to do a bit of tidying up sort one or two oil leaks give it a bit more bling

Happy

Stew

Stilldrillin · « **Reply #87 on:** April 05, 2009, 12:42:45 PM »

YEEE HAARRR!!!!

Blummin well done, you two!

I need to see one of those engines working....... Don`t understand `em......

David D

Divided he ad · « **Reply #88 on:** April 05, 2009, 01:09:11 PM »

And many more

Looks good to me Stew, all that planning paid off me thinks! Cedges runout trick certainly worked too

Just a wait to see the finished machine and then you'll have all the dancing bananas you can get

Rock on!!

Ralph.

Darren · « **Reply #89 on:** April 05, 2009, 01:43:10 PM »

Wicked.....

They certainly look like a challenge those engines, and you've done it proud Stew.....

I can only imagine how you feel, well done that man

Twinsquirrel · « **Reply #90 on:** April 05, 2009, 01:45:19 PM »

Superb! You really took a methodical approach and it has really paid off, beautiful engine and a sweet runner..

David H

sbwhart · « **Reply #91 on:** April 05, 2009, 02:34:04 PM »

Thanks Chaps you're support and encouragement

was much appreciated,

And

Johns help and advice was invaluable:- Thanks John.

Cheers

Stew

bogstandard · « **Reply #92 on:** April 05, 2009, 03:15:53 PM »

I can still see Stew's grin from ear to ear, punching the air and hopping and skipping on his way home, like a little kid with a bagful of sweets.

I would just like to let you know, Stew had done it by himself, I just supplied the extra air and lots of oil to keep it running.

Well done Stew

We did a post mortem after the major run (and it also did run slow, and in reverse) and we worked out where it needed a bit more work to make it run even better.

You are definitely one of the few Stew

Bogs

John Hill · « **Reply #93 on:** April 05, 2009, 07:06:23 PM »

Nice job!

And it runs!

[thinks] "on day, one day"[/thinks]

Bernd · « **Reply #94 on:** April 05, 2009, 07:15:39 PM »

Glad to see you beat all odds and had a runner the first time.

Way to go Stew.

Bernd

NickG · « **Reply #95 on:** April 06, 2009, 06:18:42 AM »

Well done Stew!!!!!!

Haven't seen the video yet, it won't let me at work. Amazing you got it to run first time but I thought it would! You'll never get me trying one though.

The burning questions on my mind are ... you were making two of these weren't you? Do they both run?! Are you selling one?! I reckon there'd be 1 or 2 people watching that ebay Auction should you decide to list one!

Nick

bogstandard · « **Reply #96 on:** April 06, 2009, 07:27:38 AM »

I have already given Stew this link, to see if one is worth putting on there.

http://cgi.ebay.co.uk/Collectable-Model-Elbow-Steam-Engine_W0QQitemZ260386053152QQcmdZViewItemQQptZUK_Trains_Railway_Models?hash=item260386053152&_trksid=p3286.c0.m14&_trkparms=66%3A2%7C65%3A10%7C39%3A1%7C240%3A1318#ebayphotohosting

Bogs

sbwhart · « **Reply #97 on:** April 06, 2009, 09:25:45 AM »

Thanks Chaps for your kind comments.

As for number two the frames unfinished just roughed out and I'm not too happy with the flywheel, I'll see how the one on ebay goes before deciding if its worthwhile putting it up for sale, I'll finish it off over the next couple of months:- mite as well know that I've taken it this far.

Cheers

Stew

NickG · « **Reply #98 on:** April 06, 2009, 05:03:14 PM »

Never seen one on there before, that that rate I don't think it is worth putting on, but there could be a bit of a bidding war near the end yet.

Nick

SPiN Racing · « **Reply #99 on:** April 07, 2009, 12:16:25 AM »

AWESOME STEW!

Thats really really cool that you planned it out.. did the hard work.... and IT RUNS!

Nothing in the world better than pouring yourself into something, doing the planning.. and having it work

Awesome Job!!

I would buy one of those just to play with it..... but really.. I think I will wait and build one down the road after I build a steam engine or two.

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Author Topic: Elbow Engine (Read 82038 times)

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