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Fradley Canal Crane Progress

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Stub Mandrel23/05/2010 21:03:42
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The crane is nearly finished - just needs a suitable chain and hook.

You can see (just) how I dealt with the missing pulley problem - its at the top, but offset.
 
This nasty box is going to become a short section of canal towpath, with a cement base for the crane and DAS clay stones along one edge.
 


The flash and the close up aren't too kind to my paint job!!
 
Neil
Frank Dolman24/05/2010 00:44:54
106 forum posts

     It's nice.  We know that it is an accurate model because you allowed us
   to keep track of your enquiries.  I only hope that other viewers give you
   the credit that it deserves!
Stub Mandrel29/05/2010 20:42:46
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Crane now finished! It works too, using winder, ratchet and brake, as long as the hook is holding a couple of ounces.
 
The chain is brass, but I got Jenoloite Koldblak to work on it.
 


Thanks to all who gave advice and ideas. My daughter says its cool, so that's something
 
Neil
 
Ramon Wilson29/05/2010 21:40:55
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As alluded to elsewhere Neil, you should be well pleased  with your labours. Congratulations then on finishing this rather unusual, well researched and accurately made model. You've made a lovely job of it and your attention to detail and the final presentation has produced a very realistic rendition.
 
I look forward to following your next unusual prototype
 
Kind regards - Ramon
Alan Bays20/01/2020 22:00:34
7 forum posts

Question for Neil or anyone here who has built this from his plans: the jib is shown as a bit over 8" long on the plan, which is clearly incorrect based on the column height. Are the published dimensions for this 50% actual? In which case is the jib thickness still 1/16" x 1/4" or should it be 1/8" x 1/2"?

Steviegtr20/01/2020 22:04:40
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165 photos

Brilliant. Love it. Well done.

Chris Evans 621/01/2020 15:32:44
1584 forum posts

A timely thread resurrection, I have just walked the dog to Fradley Junction from home in Kings Bromley. I will look out for the original crane on my next walk.

Neil Wyatt21/01/2020 16:22:14
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Posted by Alan Bays on 20/01/2020 22:00:34:

Question for Neil or anyone here who has built this from his plans: the jib is shown as a bit over 8" long on the plan, which is clearly incorrect based on the column height. Are the published dimensions for this 50% actual? In which case is the jib thickness still 1/16" x 1/4" or should it be 1/8" x 1/2"?

I think rogue auto dimensioning may have meant that one version of the plans had wrong dimensions when the jib was scaled to fit the page. The plans have been revised, these are the correct dimensions:

fradley jib.jpg

Michael Gilligan21/01/2020 17:18:31
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Posted by Neil Wyatt on 21/01/2020 16:22:14:

[…]

I think rogue auto dimensioning may have meant that one version of the plans had wrong dimensions when the jib was scaled to fit the page. […]

.

Looks like you might need to start counting the Angels and Demons, Neil

laugh MichaelG.

Martin W21/01/2020 17:36:42
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For them that's interested pictures can be seen here, if moderators think this infringes on IP then please delete.

Martin

Neil Wyatt21/01/2020 19:11:03
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Also photos of the crane and work in progress here:

www.model-engineer.co.uk/albums/member_album.asp?a=9872

Neil

Alan Bays22/01/2020 17:50:21
7 forum posts

Thanks Neil, that's what I had assumed.

A couple of follow up questions: What's the width of the jib material? It's not dimensioned on the plan, but looks to be about 3/8" . Also, the width of the top spacer is shown as 1" while the bottom spacer is 1 1/8" . That difference would make the main frames taper slightly towards the top. Is that correct? From the photos they look to be parallel.

JasonB22/01/2020 18:18:13
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Neil, your revised drawing has two dimension lines that don't point to anything, the 3 1/16" and the 8 13/32"

Edited By JasonB on 22/01/2020 18:26:39

Bill Chugg22/01/2020 18:22:27
1200 forum posts
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Nice work Alan. an interesting model and now on my to do list .

Would agree that from photos they look parallel.

Bill

Bill Chugg22/01/2020 18:34:01
1200 forum posts
8 photos
Posted by JasonB on 22/01/2020 18:18:13:

Neil, your revised drawing has two dimension lines that don't point to anything, the 3 1/16" and the 8 13/32"

Edited By JasonB on 22/01/2020 18:26:39

Neil.

There is also another one to the left hand side of the jib - a horizontal line below the 17 9/16 dimension ?

Bill

JasonB22/01/2020 18:39:52
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Bill, that is one end of the 8 13/32" which does not relate to anything.

Also just noticed there are two lines at bottom right with the lower one not related to anything but is one end of the 16 1/2" dimension.

Should have used Alibrewink

Neil Wyatt22/01/2020 18:58:08
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The two orphan dimensions should go to the holes they miss by a bit, both of which are correctly positioned if half-way between the holes on either side of them.

5/16" wide.

Here's a revision, as good as I can get with Corel Draw, which keeps snapping to odd places so some of the lines are poorly aligned.

Not sure overall length is spot on, do it by eye to match the hole, note the taper at the far end which is very important for a good appearance

This is why I use proper drawing programs these days...

jib.jpg

 

Edited By Neil Wyatt on 22/01/2020 19:03:09

Edited By Neil Wyatt on 22/01/2020 19:04:53

JasonB22/01/2020 19:03:26
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Posted by Neil Wyatt on 22/01/2020 18:58:08:

 

3/16" wide.

But you have added a 5/16" width dimension.

However 3/8" width would seem to work better as that would give a 3/16" radius at the bottom and say 1/8" radius at the top and therefore 3/16 + 1/8 + 16 1/2" + 3/4" = the 17 9/16" overall length from the first revision you posted

 

Edited By JasonB on 22/01/2020 19:09:46

Neil Wyatt22/01/2020 19:10:58
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Posted by JasonB on 22/01/2020 19:03:26:
Posted by Neil Wyatt on 22/01/2020 18:58:08:

3/16" wide.

But you have added a 5/16" width dimension.

However 3/8" width would seem to work better as that would give a 3/16" radius at the bottom and say 1/8" radius at the top and therefore 3/16 + 1/8 + 16 1/2" + 3/4" = the 17 9/16" overall length.

Edited By JasonB on 22/01/2020 19:04:05

Pretty sure it's 5/16, problem is the dimensions are a law unto themselves... some seem to have aligned with centres of holes others with circumferences and then the auto functions rounds them...

The problem is the program doesn't seem to let you edit starting points if snapped to objects and you ahve to zoom out to see the whole extent when you place them which means you can't be picky about where they start/finish.

As I say, this is why I use proper software now...

The main holes are 18" apart on the real thing, 1 1/2" on the model. A quick look at the photos of model or real thing should be enough to get it looking right.

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