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Member postings for Chuck Taper

Here is a list of all the postings Chuck Taper has made in our forums. Click on a thread name to jump to the thread.

Thread: Interesting YouTube Video.
23/06/2022 08:29:44

Found this on YouTube this am. New to me.

The Model Engineers - Mini Documentary

Fairly impressed.

Frank C.

Thread: Phosphoric Acid experiment
17/04/2022 12:36:34

Ok this is probably of little interest to anyone but nonetheless

Have this old fragment of (what now appears to be) wrought iron. Been using it for years to open paint tins, lever out nails etc. You know the sort of thing.


Recently decided to try clearing rust off a section using Phos. Acid. (light grey area in above photo)

24hour immersed in acid reveals interesting striations in the structure of the metal - once the rust is 'dissolved'.


(I believe this is consistent with old wrought iron)

Will probably do some follow up exploration on this. Should it be of interest I may post more photos.


Frank C.

Thread: Another mystery object
16/03/2022 21:48:16

Looks like a saw set.


Thread: Electrical outlet search
13/03/2022 09:21:04

The picture is a clip from a background of another picture. It's all I have.

Michael - made me contemplate rewiring then entire shop in the manner of a stage set - which might actually have merit.

DC31k - I know.....sigh!

Why is it that all (aka - the overwhelming majority) of extension sockets have the cable exit on the right. Sometimes you just need it on the left. Or is that just me?


Frank C.

13/03/2022 07:59:07

Regarding the item picture below:


What is its correct name / description? (google return no match for either image search or misc. word combinations)

Are they 'retired' or readily available?

I have been searching for such for some time.


Frank C.

Thread: Don't really know where to Topic this.
10/03/2022 11:14:16


Interesting YouTube Video!

I suppose.


Thread: complete engineers workshop
02/03/2022 17:31:33

PM sent

Thread: Good YouTube videos
26/02/2022 09:23:07

Tim's Railway (featuring on his "Way out West " channel) is, at least to my mind, an interesting and engaging look at a real world 'farm railway'.

Some of his other projects make worthwhile viewing - the exploding boiler episode is - sobering.


Thread: Songs about Engineering
23/02/2022 12:59:01

City of New Orleans (Arlo not Willie)

Edited By Chuck Taper on 23/02/2022 12:59:25

Thread: That Strange Calculator Again
17/01/2022 14:35:35

... and they appear to do so when the 30 & the 0 are in alignment.

Also he detent spring would appear enabled to engage, or lock, both dials at the point of alignment.

It's not clear (to me) if this applies to both 0 points on the outer dial.

Quoting from the original reddit posting "Both rings rotate clockwise freely but lock in this position when rotated counterclockwise." (see Reference earlier in thread)

"...this position..." is a bit ambiguous but I am assuming that it is the home position of the apparatus i.e. 30-0-0


Thread: Is it possible to machine a lathe more accurate than the one you machine it on? If so, how?
30/10/2021 10:40:07

The following, perhaps not directly relevant to OP, but......etc.

The machine that made everything.


Thread: Multi-dimensioned Drawings
07/04/2021 07:48:39

Perhaps one of these!



Thread: WHAT IS IT ?
24/03/2021 09:11:15
Posted by Michael Gilligan on 24/03/2021 08:39:39:
Posted by Chuck Taper on 24/03/2021 08:14:51:


Based on the woodgrain, and the other roughly scaleable items in the photo on reddit ... I would guess that a finger-tip might fit nicely in the holes, to dial an entry.


The scale appears to be a lacquered surface - on either a cork or wood substrate - (sector 4 top of your clearer picture)

I'm not entirely convince the outer dial rotates - appears fixed by at least 3 rivets - ergo the only moving part is the inner dial.

So a lacquered scale and a 20 hole 'dial' both fixed to a rear plate. (the 20 holes being divided into two sets of 10 - for some reason)

An inner rotating plate with 30 register points.

Speculation - rotating the register plate will align a number on that plate with and a number on the outer dial at only a limited set of locations. Information is read from the relevant sector.

Hopefully someone won't ruin this by coming up with an answer.


.Frank C

24/03/2021 08:14:51

If you have the physical device........

Would it be possible to re post the photograph showing the device next to a rule.

Alternatively post some dimensions.

If not above possible would anyone hazard a guess at sizing based on limited information.


Frank C.

Thread: YouTube stuff....
19/03/2021 09:52:24

Apologies if this is redundant post.

Jeremy Schmidt

Frank C.

Thread: Does old meths burn less hot?
13/03/2021 10:06:35

My understanding is that they only harden in the absence of air enhanced by the presence of metal ions.

The presence of 'air' (oxygen) in storage is necessary to NOT harden.

They are (mostly) single component fluids of large molecular size - so low volatility.

The technicals appear to be endless.


Thread: Design of boilers
05/03/2021 10:08:16
Posted by SillyOldDuffer on 05/03/2021 09:45:08:
Posted by Andy Stopford on 04/03/2021 20:15:21:
Posted by Nigel Graham 2 on 03/03/2021 23:09:22:




I agree!

I wonder what an engine specifically engineered to win IMLEC would look like. An engine with no obligation to resemble a full-size locomotive, or to be practical beyond winning IMLEC, and run in conditions that don't require the boiler to be certified.

I suggest:

  • A tall vertical boiler balanced by outriggers
  • Draught created by a tall chimney, not steam blast
  • Waste steam used to pre-heat air intake and tender water
  • Scale prevented by only running on distilled water
  • High pressure, possibly from a water-tube boiler, with efficient superheat. (Isn't a water-tube boiler the logical conclusion to Bob's idea? It's all done with radiant heat.)
  • If a fire-tube boiler is used, corrugate the firebox
  • Oil burner to maximise heat and remove ash issues.
  • Only burns one oil of known heat value so that combustion and heat transfer can be optimised.
  • Grate area, firebox volume, and heating surfaces, calculated and proportioned to match the fuel and to optimise IMLEC performance.
  • Large diameter steam pipes and a big steam chest
  • Valve gear simplified to minimise friction
  • Large aperture poppet valves, precision made to minimise leaks, possibly from exotic materials.
  • Everything thoroughly insulated without regard to appearance!
  • Optimum speed and load determined by experiment with a Dynamometer Car, and observed during trial
  • Maximum automation allowing the boiler to control input and output to eliminate the possibility of a heavy handed driver wasting steam with excessive acceleration, or otherwise running the engine outside it's sweet-spot. Also manages combustion to best effect, neither underheating or overheating the boiler. Remote control and automatic shut-down
  • Ideally driverless and without human passengers because they wobble, shift and raise the centre of gravity. Also, removing people means bigger risks can be taken with the boiler, speed, and balance.
  • Thermal proportions, weight, adhesion, static and dynamic balance and other design features to be computer modelled to optimise performance
  • Only run the engine under ideal track conditions - level, stiff track in good condition, few points, and large curve radii etc. And only run on dry, windless days.



Actually does sound like a great challenge or a new category!


Thread: water level sensor
05/03/2021 08:54:41
Posted by Michael Gilligan on 05/03/2021 08:42:04:

Here we go, Duncan ...

Tube OD 6mm, ID 3.8mm, Material = botosilicate glass

Red light from a point-source 3mm from the tube surface

Tube filled with Air / Water / Glass

[Snip, Snip, Snip]





I'm intrigued - how, what etc??

What software is that?


Frank C.

Thread: Newcomen Plans or kits - looking for.
03/03/2021 15:54:25

Thanks to all who took the time to reply. I appreciate it - it all helps.

As I understand it this is the engine that started it all - however its inefficiency somewhat limits its scope.

Nonetheless one can't help but wonder if a multi cylinder version is possible or perhaps it could be harnessed to enable one of those horseless carriage contraptions that are all the rage.

I could/should tackle it from first principles but laziness whispered that a kit would be a quick fix. I think I will have a ferret through my junk box and see what might be possible. If anything promising emerges I might report back.


Frank C.

02/03/2021 23:14:47

Could anyone recommend a source for decent Newcomen Engine plans or better yet a good kit. There is some stuff out there but .... a bit wanting.

Ideally I'm looking for something that clearly illustrates the central principle & operation of the engine rather than a strictly historical recreation - not sure if I explain that clearly.

Thanks in advance for any help.

Frank C

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