By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Nov 29

ME Vertical Boiler & Hand Pump

Figure 1?

All Topics | Latest Posts

Search for:  in Thread Title in  
RichardN15/03/2018 08:47:23
102 forum posts
9 photos

Just sat down in hospital with my son to read the latest instalment of the vert boiler, and I can’t see figure 1, assembly view of the hand pump. Was this in a previous issue that I should also have brought with me? The photos in part 4 are numbered from 1 so I assumed the figures would too?

Richard

JasonB15/03/2018 10:09:39
avatar
Moderator
15005 forum posts
1522 photos

No it is not in previous issues, I'll ask Martin E if he can post it here and also include in a later paper issue as I'm sure an assembly drawing would make things a lot clearer for a beginner.

And while I'm on would it be possible for future drawings to not have the tapping size hole printed in such small type and preferably positioned outside the actual part as they are hard to read at the moment.

 

J

Edited By JasonB on 15/03/2018 10:18:24

Bob Youldon15/03/2018 11:31:33
183 forum posts
20 photos

Jason,

Whilst you are at it, can you also ask Martin to explain why it is necassary to produce a ball valve seat with a 15deg angle face as opposed to a flat seat when the ball in fact seats on a knife edge contact, also a 5.5 mm slot drill will produce the seat just as easy.

Regards,

Bob

JasonB15/03/2018 12:12:22
avatar
Moderator
15005 forum posts
1522 photos

I have sent Martin a link to this thread so hopefully he will see your query too.

Quite a few people use a conical seat even done it myself, the angle gives a sharper knife edge and the ball seats more easily as I understand it. Though as you say a 7/32" slot drill is a quick way to do it and avoid making the tool. Reamed or bored would be ideal.

What would be more of an issue is the smaller hole being drilled may not be perfectly round so knife edge or not you may not get such a good seal.

Edited By JasonB on 15/03/2018 12:13:11

RichardN15/03/2018 12:22:19
102 forum posts
9 photos

Many thanks - I had been looking at buying a small hand pump, but when this series started I hoped the pump would be included too to make my own.

From the brief skim I had earlier, the form tool would create the cone - which if you use the 'thump a spare ball' methodology for creating the seat presumably is easier with less metal to move, and thus creates a larger seat to seal? Would you drill undersize and ream before the cone is formed then Jason?

JasonB15/03/2018 12:34:00
avatar
Moderator
15005 forum posts
1522 photos

It is the smaller 2.5mm l hole that needs to be round though at such a small size it's not such an issue, different on a bigger valve like the ones with 1/2" balls in the pic above where I bored the hole

Bazyle15/03/2018 17:58:44
avatar
4439 forum posts
184 photos

I thought the reason fro a coned seat was to give somewhere for the swarf you didn't clean out properly to live without sliding onto the working surface.

Rockingdodge15/03/2018 20:39:13
avatar
77 forum posts
10 photos

How many issues is this boiler build planned to take?

JasonB15/03/2018 20:46:51
avatar
Moderator
15005 forum posts
1522 photos

Quite a few I think

Rockingdodge15/03/2018 20:53:29
avatar
77 forum posts
10 photos

Would it not be better to have it in consecutive issues rather than alternate ones?

Just kind of think the amount of content will be read and done within a couple of days and then a month before the next part can be built, that's going to drag big time. sad

Samsaranda16/03/2018 08:36:29
avatar
614 forum posts
4 photos

I suspect the reason that article appears in alternate issues is probably to do with sales of the magazine and ensuring commitment to future issues, or am I being too cynical?

Dave W

Baz16/03/2018 09:25:20
166 forum posts

I think the little oscillating engine took well over a year to describe in EIM, on that basis I doubt that we will see the final boiler drawings until about summer of 2019. IF I recall correctly this all started out as the EIM steam plant with a picture of the boiler and oscillating engine, somehow it has now changed to ME and the engine featured in photos has changed to a Stuart 10V. What happened? Why the change of magazine?

norm norton16/03/2018 10:49:21
90 forum posts
5 photos
Posted by JasonB on 15/03/2018 12:12:22:

I have sent Martin a link to this thread so hopefully he will see your query too.

Quite a few people use a conical seat even done it myself, the angle gives a sharper knife edge and the ball seats more easily as I understand it. Though as you say a 7/32" slot drill is a quick way to do it and avoid making the tool. Reamed or bored would be ideal.

What would be more of an issue is the smaller hole being drilled may not be perfectly round so knife edge or not you may not get such a good seal.

Edited By JasonB on 15/03/2018 12:13:11

Jason, nice clear picture, thank you.

When you make a screw in seat like this how do you ensure a seal of the thread. Loctite them in?

Norm.

JasonB16/03/2018 11:57:09
avatar
Moderator
15005 forum posts
1522 photos

Yes I just used a low strength thread lock which will come apart again with hand tools.

Neil Wyatt16/03/2018 16:17:19
avatar
Moderator
15676 forum posts
658 photos
73 articles
Posted by Samsaranda on 16/03/2018 08:36:29:

I suspect the reason that article appears in alternate issues is probably to do with sales of the magazine and ensuring commitment to future issues, or am I being too cynical?

Dave W

As ME carries lots of long series, you could easily end up with a long series of issues all feeling very similar, especially to readers who don't enjoy one or two of those series.

Because it is bi-weekly the alternate issue approach allows a much greater variety of content to appear over each month while not resulting in series taking longer than would be the case with other magazines (because they are monthly).

At one time MEW, which is monthly, was running three long series concurrently in every issue and the resulting lack of variety had quite an impact on readers, even though the series themselves were very good.

It's also very demanding on non-professional authors to produce articles at a rate which keeps up with fortnightly publication. Ideally series are submitted complete, but for long series this isn't a general rule.

Jason and I can both vouch that even writing a bi-monthly series in real time can be a challenge at times!

Neil

Bob Youldon19/03/2018 17:20:40
183 forum posts
20 photos

Hi all,

I recall old LBSC talked about his two hour hand pump,it now takes me two hours just to look for the materials! , It'll be interesting to see just how long it'll take to describe the construction of this one, not to mention the array of machine tools required to do the job.

Regards,

Bob

JasonB22/03/2018 13:19:26
avatar
Moderator
15005 forum posts
1522 photos

I have just heard back from Martin Evans and the missing Fig 1 will be included in part 5 of teh series which I assume will be in ME 4584.

J

Rockingdodge22/03/2018 13:58:02
avatar
77 forum posts
10 photos
Posted by JasonB on 22/03/2018 13:19:26:

I have just heard back from Martin Evans and the missing Fig 1 will be included in part 5 of teh series which I assume will be in ME 4584.

J

Umm Martin Gearing??? cool

JasonB22/03/2018 15:19:53
avatar
Moderator
15005 forum posts
1522 photos
Posted by Rockingdodge on 22/03/2018 13:58:02:
Posted by JasonB on 22/03/2018 13:19:26:

I have just heard back from Martin Evans and the missing Fig 1 will be included in part 5 of teh series which I assume will be in ME 4584.

J

Umm Martin Gearing??? cool

????

It was Martin Evans who e-mailed me in reply to the e-mail I had sent him mentioned at the beginning of this thread. Martin Evans is acting editor of ME while Diane is on sick leave.

Andrew Wood 725/03/2018 19:54:35
12 forum posts
4 photos

I have a question about the D bit to be used to make the valve seat. I am slightly confused in part 4 by the drawing of the bit figure 2 that appears to me to show the 15 degree slope the opposite way compared to the way I thought it should be and compared to the picture no 4. Anyone else have the same issue?

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Support Our Partners
Warco
ChesterUK
Ausee.com.au
Eccentric Engineering
Eccentric July 5 2018
emcomachinetools
Sarik
TRANSWAVE Converters
Allendale Electronics
Subscription Offer

Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest