Helping dad vertical engine

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Helping dad vertical engine

This topic has 36 replies, 12 voices, and was last updated 20 February 2021 at 08:01 by Stewart Hart.

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14 April 2015 at 15:40 #186390
Eric Cox
Participant
@ericcox50497
`

Edited By Eric Cox on 14/04/2015 15:47:42
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14 April 2015 at 15:40 #38790
Eric Cox
Participant
@ericcox50497
14 April 2015 at 16:38 #186396
Stewart Hart
Participant
@stewarthart90345
?

Stew
15 April 2015 at 14:47 #186494
Neil Wyatt
Moderator
@neilwyatt
!
15 April 2015 at 17:38 #186520
Mike Bondarczuk
Participant
@mikebondarczuk27171
15 April 2015 at 20:51 #186557
Stewart Hart
Participant
@stewarthart90345
? ?
15 April 2015 at 20:59 #186560
Michael Gilligan
Participant
@michaelgilligan61133
Given that Eric's post was under "Drawing Errors and Corrections" … one might reasonably assume that the "Helping dad vertical engine" is near perfect.
15 April 2015 at 21:03 #186563
Stewart Hart
Participant
@stewarthart90345
No I doubt it.

Errors always creep in some ware.

The best you can do is limit their impact.

Stew
15 April 2015 at 21:51 #186569
Michael Gilligan
Participant
@michaelgilligan61133
Stew,

I did say 'near perfect'

… We must not ignore Eric's somewhat cryptic `

MichaelG.
16 April 2015 at 07:01 #186580
JasonB
Moderator
@jasonb
Unless you got to read what he said before the post was edited, in which case you will know what its all about
16 April 2015 at 09:21 #186595
Eric Cox
Participant
@ericcox50497
My apologies, I couldn't find a way of deleting the post , however I will repost it. I won't go into the ins and outs of why I needed to remove it.

On the bill of material Item 15 Connecting rod should read 1/4" x 1/2" x 4"
13 June 2017 at 20:25 #302460
Chris Gill
Participant
@chrisgill22114
I'm busy making this engine at the moment and I believe I've spotted a small error on page 513 (April 2015).

I think the central portion of part 39 (the parallel shaft) should be 26mm long, which is the sum of the central portion of part 22 (14mm) and two copies of part 24 (6mm). This means the overall length of part 39 will be 46mm.

I'd also suggest making the studs (part 41) a bit longer, say 36mm, as the existing length only engages 3mm at each end. I made mine from 4mm threaded rod to save time.

Otherwise, looking forward to seeing it run

Chris
14 June 2017 at 07:19 #302485
Stewart Hart
Participant
@stewarthart90345
Hi Chris

Thanks for your interest in the engine and for posting the drawing errors, I hope you enjoy the rest of the build.

Cheers

Stew
14 June 2017 at 09:38 #302507
Eric Cox
Participant
@ericcox50497
Bugger. Does that mean I've made them too short.
14 June 2017 at 23:37 #302590
Chris Gill
Participant
@chrisgill22114
Hi Eric

I didn't realise until I did a trial assembly.

If it's any consolation I had to remake a part today because I got the first one upside down for part of the marking up. Doh!

Chris
15 June 2017 at 05:59 #302597
Bob Mc
Participant
@bobmc91481
Yes….. I made one of those just to see if I could make anything that actually worked..!!

…nb… only ran it on compressed air but it certainly went.
15 June 2017 at 08:28 #302615
Stewart Hart
Participant
@stewarthart90345
Posted by Bob Mc on 15/06/2017 05:59:21:

Yes….. I made one of those just to see if I could make anything that actually worked..!!

…nb… only ran it on compressed air but it certainly went.

Pleased you got a runner Bob, I hope you enjoyed the build, did you make the flywheel from perspex?.

I like to experiment with different ways of making things so I designed it with a fabricated fly wheel, have any of you guys made this fly wheel ?. I was a little unsure just how people would take to the design hence I gave them a chose of fly wheel design.

Cheers

Stew
15 June 2017 at 09:33 #302626
Eric Cox
Participant
@ericcox50497
I fabricated it from 5" Dia. pipe. With a paper template it was easy to hacksaw and drill.

Stewart, is the grass hopper ready for publication yet ?.
15 June 2017 at 11:21 #302648
Stewart Hart
Participant
@stewarthart90345
Posted by Eric Cox on 15/06/2017 09:33:55:

I fabricated it from 5" Dia. pipe. With a paper template it was easy to hacksaw and drill.

Stewart, is the grass hopper ready for publication yet ?.

Hi Eric

I submitted the Grasshopper article over 12 months ago for some reason its not been published, and as it was written as a follow on from the other two engines, the passing of time has taken that link away so it will need a re-write so that it will now stand alone, I'm not sure if it will be worth my time doing this.

Any way I've sent you the drawings and a link to a drop box with the article in it.

Any problems just drop me an email.

Cheers

Stew
15 June 2017 at 11:38 #302652
Bob Mc
Participant
@bobmc91481
Hi Stewart..

Yes the flywheel is thick perspex as are the bearing housings, It was the only material in my junk box and I was concerned it would not be heavy enough but it runs ok and it was an education and a pleasure for me to make this model.

I think a heavier flywheel would be more appropriate … one tip I can give is… bolt or clamp the engine base to a good solid bench, its probably my workmanship at fault, but when running it resembles a drunken Scotsman dancing over the crossed swords….! (not a derogatory remark to Scotsmen)… I am myself related to Scotland.

Thanks Stewart.
31 July 2017 at 23:26 #309684
Chris Gill
Participant
@chrisgill22114
It runs! Just got to make a nice base, clean up and paint it.

The first attempt ended with a loud bang. Then I realised I'd connected to the unregulated side of the compressor and the short connecting pipe had migrated to the other side of the garage. Ho hum
1 August 2017 at 06:36 #309697
Stewart Hart
Participant
@stewarthart90345
Hi Chris

Congratulation on getting a runner I bet your well chuffed, any chance of a few pics or a video

Compressed air can be a little tricky I've had my pipes crossed before now.

Cheers

Stew
4 August 2017 at 19:33 #310398
Chris Gill
Participant
@chrisgill22114
Posted by Stewart Hart on 01/08/2017 06:36:54:

Hi Chris

Congratulation on getting a runner I bet your well chuffed, any chance of a few pics or a video

Compressed air can be a little tricky I've had my pipes crossed before now.

Hi Stew

Will do – it's stripped down for painting at the moment so it'll be a few days
11 August 2017 at 21:34 #311540
Chris Gill
Participant
@chrisgill22114
Hi Stew

I finally finished all the painting and reassembly. If the real thing ran at the speeds I got out of this little model it would have torn the building apart! Here's a pic you might like (not got to grips with posting to YouTube yet – strange the skills you have to acquire to get into engineering).

Incidentally, you mention a third engine in the series – did it ever get published? Thanks
12 August 2017 at 07:49 #311570
Stewart Hart
Participant
@stewarthart90345
Hi Chris

Your getting a nice little collection of engines there, I've recently been in touch with Diane and hopefully the third engine will be published soon.

Models do tend to run faster than full size its something to do with the scaling effect, the full size one runs very sedately you can see it running at the Northern Mill Engine Society at Bolton I think there's a video here https://www.nmes.org/

I've also sent you a PM

Her's a little taster of the last of the trilogy, its a little more detailed than the other three, and I've used a laser cut fly wheel I can give details of where I got it cut for those who are interested I have no connection with the firm just a satisfied customer.

And her's all three

Cheers

Stew
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