By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for Ron Colvin

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

Thread: My really awful week!
08/11/2019 16:49:38
Posted by Nick Clarke 3 on 06/11/2019 10:31:22:
Posted by Phil Whitley on 05/11/2019 20:46:03:

........ I have actually been dancing to the radio ( well thats what I call it anyway!)

If you don't call it a radio what do you call it? dont know

A crystal setsmiley.

Thread: How to upset the neighbours!
11/09/2019 13:00:51

There is a company that is producing an updated MGB. It seems that it produces to an electrifying experience.


Thread: Scale gauges
22/08/2019 18:37:41

The origin of having a set of standard gauges was introduced by a toy manufacturer in 1891 (Märklin ) . They were gauges numbered 1 to 5

Number 1 gauge = 45mm

Number 2 gauge = 54mm

Number 3 gauge = 67mm

Number 4 gauge = 75mm

Number 5 gauge = 120mm

The only one that has remained to its original dimension is gauge 1.

22/08/2019 14:01:47
Posted by 34046 on 22/08/2019 12:40:53:

That is interesting Ron

i always understood back along when I spoke to Reeves that drawings for locos were drawn to scale ie 0.75 inch for 3.5 gauge, 1 inch for 5 gauge and 1.5 for 7.25 gauge ?

Is this correct please ?


More likely that someone who has chosen to build with a correct scale/gauge ratio has decided to build a model of a prototype for which no drawings or castings are available. There is a lot of extra design/drawing work involved in producing a more authentic representative of a given locomotive from a published standard design. For example see the current ME series of articles by Doug Hewson on updating LBSC's pannier tank locomotive "Pansy".

22/08/2019 12:08:48
Posted by SillyOldDuffer on 22/08/2019 10:44:15:
Posted by 34046 on 21/08/2019 19:47:56:


7,25 inch locos and rolling stock are built to a scale of 1.5 inches equals 1 foot.



Like Merlin I'm confused slightly by scale and gauge.

A scale of 1½" to 1' is 1:8 so standard gauge ( 4'8½" ) rail track should be modelled 7¹⁄₁₆" apart. Not that it makes any difference, but why jump to 7¼" or even 7½" as is popular in the USA?


Edited By SillyOldDuffer on 22/08/2019 10:45:12

With passenger hauling model locomotives it is the gauge that is important, the scale is nominal. If someone is a stickler for having a correct scale/gauge ratio, they can tweak the scale accordingly. With small scale scenic model railways the scale is generally kept constant, and it is the gauge that is adjusted by the purist.

Thread: Electric Cars
11/07/2019 14:16:57

I foresee five years from now the uptake of electric vehicles being no where near the figures being currently predicted. In fifteen years nearly every new road vehicle will be an electric.

Edited By Ron Colvin on 11/07/2019 14:17:42

Thread: Coal Merchants Wagons
20/06/2019 17:02:10

I remember as a lad, seeing in the windows of coal merchants, large scale models of railway wagons (they could have been 7 1/4 inches gauge or even 10 1/4 inches), painted in the livery of the company. After a brief search on the web, I have not found references to these models. Were they a wide spread phenomena?. Does anyone know of any that still exist?.

Edited By Ron Colvin on 20/06/2019 17:06:30

Edited By Ron Colvin on 20/06/2019 17:09:19

Thread: Making a Start in FreeCAD
20/06/2019 15:22:18
Posted by SillyOldDuffer on 20/06/2019 14:33:53:
Posted by Versaboss on 20/06/2019 13:40:37:

... I really wonder every time why Onshape is never mentioned here (except by me I think!).

I just did SOD's example in Onshape, and it is so much easier. ...

Kind regards,

Hi Hans,

The only reason I've never taken an interest in Onscape is the price. The Standard license is $1500 per year and Professional $2500. But is Onshape like Fusion360, with a free version available for hobbyists and students? (Fusion don't exactly make it clear they have a no-fee license for hobbyists, students and small businesses.)

I'm not attempting to convert anyone to a particular package. FreeCAD suits as way in to 3D-CAD because it's Open Source and avoids license problems and the fear that free access to a commercial product might be taken away later. Playing with FreeCAD might waste time but it won't cost money!

Alibre, Fusion, Onshape and others all have significant merit, not least that FreeCAD isn't as slick, advanced or bug-free as any of paid-for products. I switch to Fusion for complicated modelling, multiple parts and joints.


Onshape is free to hobbyist the biggest restriction being, that the free subscription only allows public data. in other words anyone has access to your work.

FreeCAD has the advantage over Alibre, Fusion and Onshape, in regards that , you do not find yourself waiting for the other shoe to drop, and what has been "free" up until now, you are suddenly charged for.

Thread: DraftSight no longer free
09/06/2019 15:02:08
Posted by Barrie Lever on 08/06/2019 18:40:25:

Fusion 360 will be next, now that the stupid little spat between Dassault and Autodesk is probably over.

You will hear the cry's all over the country then.

Maybe not. I use Onshape rather than Fusion 360, but the free use for non-commercial users is pretty much the same deal. I do not believe that model engineers, that are predominantly older chaps (Not being a sexist here and I realise that one of most accomplished model engineers in Britain is a woman) are the principle targets for these free arrangements. The vendors of these products are trying to win over young people with design aptitude, being well aware that once someone has invested time and effort into learning a program they have an incentive to stick with what they are familiar with. These youthful users may well be in commercial positions later on to specify the software the companies that they are working for will be using.

Thread: Why a round bed?
02/06/2019 14:42:32
Posted by Nicholas Farr on 02/06/2019 07:16:50:

Hi, have you read this **LINK** it may help you to understand some of the reasons for the design.

Regards Nick.

Tried calling Guildford 153, but so far no response. I wonder if the M.O.D. still have some in storage that they would be willing to sell off at low cost.

Thread: Chinese Lathes
09/05/2019 15:12:28

Sorry, I double posted.

Edited By Ron Colvin on 09/05/2019 15:14:54

09/05/2019 15:11:01
Posted by Andrew Johnston on 08/05/2019 22:05:49:
Posted by SillyOldDuffer on 08/05/2019 18:01:23:
Any lathe is better than no lathe, which is more than can be said of wives!

Darn right!

Lathes don't get jealous if you've got another one, or more, on the side

Lathes don't moan if you ignore them for a period

Lathes don't complain if they don't get serviced as often as they should

Lathes don't get headaches

Lathes are ready to perform immediately after power on

Lathes don't go on shopping sprees, but love it when you buy accessories

Lathes don't get pregnant


Pregnant lathes!, so you would never have to buy another one. Pity though that they would be out of commission for 9 months.

Thread: "Screwing" a car round a corner!
28/04/2019 14:25:58

The late James Hunt former Grand Prix world champion, owned a Austin A35 van. He was quoted as saying that it was his favourite road car because he could drive it at the limit without driving illegally.

Thread: Myford colours
11/04/2019 17:23:19

I am certain it is not light Admiralty grey (Naval light grey), as one company that I worked for, produced equipment for the Royal Navy that had to be finished in that colour. It appeared to me to be a pale blue, though none of my colleagues could discern this. The colour though was a lot lighter than the finish on the Myford ML7 lathe that I had to occasionally use.

Thread: Machinery Directive and CE marking
05/04/2019 17:19:38

I did find the current topic a little worrying, as my last completed project was what to do with a 1970's vintage Black and Decker electric drill.

Thread: Rulers - my pet peeve
04/04/2019 17:45:59

the four inch rule.jpg

This one came out of a Christmas cracker, I keep it in my wallet, it gets a surprising amount of use.

Thread: Logging in to forum
23/02/2019 15:49:52

I find that regular logging is a good practice, otherwise I tend to forget my user name and password.

Thread: Testing for isolation
03/02/2019 15:00:22

I once manged to lay a spanner across the terminals of a 12v car battery. Lucky I was not holding on to it at the time. The cable insulation immediately begun to melt away. With the advent of the newest 48 VDC vehicle electrical systems, I should imagine that result of such a short would be more spectacular/lethal.

Thread: Gatwick Drone 'Attack'
09/01/2019 15:53:56
Posted by Richard brown 1 on 09/01/2019 08:27:23:

Imagine how easy it would be to disable the RAF quick reaction force, just fly a drone or two around the runways. And how long will it be before the local scum bags take out the police helicopters while their mates go out and do a nights work?

Drones could provide a much more cost effective way to keep track of the scum bags than the helicopter.

08/01/2019 18:00:21

The drones now appear to have moved on to Heathrow.


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
Eccentric July 5 2018
Eccentric Engineering
TRANSWAVE Converters
Meridenne Boat 2019
Allendale Electronics
Subscription Offer

Latest "For Sale" Ads
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