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Member postings for Paul Lousick

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

Thread: Silver Soldering Materials
17/01/2021 01:32:40

Thanks Keith for setting me straight about incorect information that I had been given. Never too late to learn something new. Loctite and soft solder does not work for steam and boiler fittings that I make but will do more research on the grades of silver solder for different materials and applications.

Paul

Thread: Disposable Gas Bottles
16/01/2021 12:09:10

Similar problem disposing of gas bottles in Australia at the council wastel centres (aka., tip, rubbish dump). The problem is that if the metal waste is sent to for re-cycling and melted down thjere is a danger that they could explode. Even those that containing only air can explode when they are heated and the air inside expands. There are special disposal places for dangerous goods (gas bottles, poisons, paint, etc). Gas bottles can be displosed of here if they are cut in half (safely using correct procedure). as scrap metal.

Pau

Thread: Silver Soldering Materials
16/01/2021 05:14:04

The size of the burner and gas will depend on the size of the job. A butane torch burns at about 1315 deg C and Propane about 1980 deg C.

The grade of silver solder will depend on the strength of the joint that you want to achieve. The higer the percentage of silver in the alloy, the higher the strength, melting point and price. (you are buying silver)

The lower grades of silver solder that plumbers use can be purchased at your local hardware store but for the higher grades you may have to go to a welding supplier.

Paul

Thread: What nut and bolt material?
15/01/2021 06:20:29

There are several families of stainless steels with different physical properties. The magnetic properties of stainless steel are very dependent on the elements added into the alloy. A basic stainless steel has a ‘ferritic’ structure and is magnetic, formed from the addition of chromium – it can be hardened through the addition of carbon, making it ‘martensitic’. However, the most common stainless steels are ‘austenitic’ – these have a higher chromium content and nickel is also added. It is the nickel which modifies the physical structure of the steel and makes it theoretically non-magnetic.

304 stainless steel contains chromium (min. 18%), and nickel (min. 8%). It is an austenite steel and is only slightly responsive to magnetic fields. It also contains 18 – 20% chromium and 8-10.50% nickel, and lesser quantities of some other elements. It is relatively easy to machine and less expensive than 316.

316 stainless steel is a molybdenum-alloyed steel. The fact that it is also negligibly responsive to magnetic fields means that it can be used in applications where a non-magnetic metal is required. It also contains a number of other elements in varying concentrations. 316 can work harden and make machining difficult. It has a much better corosion resistance and is used for marine fittings.

I recently inspected the spindles on some model globe valves which I made about 18 months ago out of 304 S/S because they were not sealing properly and found that the seats were pitted and coroded. Now have to make them again, this time out of 316 grade.

Paul

50-2 globe valve.jpg

Thread: Drawing for a whistle
15/01/2021 00:37:22

No more than that used in a chime whistle Duncan

14/01/2021 23:39:49

The frequency of a whistle is controlled by its length and the shorter it is, the higher the pitch. Which is why little whistles annoy dogs and hurt the ears of small children. The diameter of the tube effects the loudness/volume of whistle.

I am in the process of designing/making a whistle for my engine and to get a deeper sound, contemplating a whistle with a dividing plate in the tube, making the sound cavity longer in a short tube. A bit like a chime whistle but with only one music note. ( I will post an update after it is made and tested)

Paul

turn back whistle 2.jpg

Thread: Coronavirus death stats
14/01/2021 23:07:12

We are extremely fortunate in Australia and have not sufferer as much as you have in UK. Although we are on the other side of the world, we did shut down our borders in the early days of the ourbreak.

The wearing of masks, sanitising hands, limiting people at venues and social distancing has helped to control the spread of the virus. We are encouraged to not leave home unless absolutely necessary and have a Covid test if we have the slightest symptom of a cold or sore throat. Testing is free to everyone.

To track and control the spreading of the virus, stores are required to register all customers. We use the camera on our mobile phone to scan a QR code as we enter and if an infected person has visited the store, all other customers can be contacted and tested.

State and International borders have been re-opened and limited international flights have comenced but to prevent the spread of COVID-19 all travellers arriving in Australia have to go into government approved mandatory quarantine and be free of the virus for a minimum of 14 days.

Out of our population of 25 million we have had 28,600 infections and only 900 deaths. There are about 275 active cases at the moment with the majority from overseas travellers which are in quarantine. No new community acquired infections have been reported today.

Stay safe,

Paul

Thread: Binocular loupe
14/01/2021 21:59:15

I use a head mounted magnifyer with LED light and 5 interchangeable lenses

**LINK**

magnify glasses.jpg

Thread: Back issues & Flash plugin
14/01/2021 09:45:56

Mike,

You will still be able to view the issues of MEW that you subscribed for and some of the archive issues as they are not in Flash format.

Pocketmags is a better way of viewing the digital magazines and all issues of Model Engineer and Model Engineers Workshop are readable from January 2016 as they do not use Flash.   But Pocketmags does not have all of the earlier issues that are on the ME site

Paul

 

Edited By Paul Lousick on 14/01/2021 10:10:53

Thread: Drawing for a whistle
14/01/2021 09:31:57

I have not used one (too small for my engine) but lots of tiny steam whistles with valve are for sale on ebay at a reasonable price.

Paul

 

Edited By Paul Lousick on 14/01/2021 09:32:37

Edited By JasonB on 14/01/2021 10:04:57

Thread: What nut and bolt material?
14/01/2021 05:44:39

Your model is a fire engine and they had lots of polished brass, so unless they are under heavy load, brass nuts and bolts .

Paul.

Thread: Markie Showmans Engine Model
13/01/2021 23:59:14

The serial number should be stamped on the boiler and is done when it was first tested. May be under a cover but has to be seen by the inspector who does subsequent certification checks.

Paul

Thread: Back issues & Flash plugin
13/01/2021 22:19:00

There are many alternative applications for viewing flash files.

Can anyone recomend one for Windows 7 ?

Adobe has has always suggested to update to their latest version for security reasons. Is there a security risk when viewing Flash files ?

Paul

Edited By JasonB on 14/01/2021 07:02:02

Thread: It Is A Steam-Engine... Using the term loosely
13/01/2021 01:54:00

Internal combustion engines in cars also use steam engine principles. Is it a steam engine ? No. Steam is defined as the gasseous form of water when it is heated. Cold steam is water or ice.

Tony,

It is be possible to harness the energy in the suspension movements and convert to electricity bu using a permanent magnet inside a coil. OK on a bumpy road but not much use cruising on a highway.

My portable 12v Engel refrigerator works on a similar principle and has a compressor that has only one moving part unlike many rotary type compressors. Instead a piston is connected to an electro dynamic device which is powered by the use of magnetic fields. Also more economical to run than one with a rotary type compressor.

engel_swing_motor_sawafuji_graphic.jpg

Paul

Thread: Manual threading on the lathe - problems
13/01/2021 01:19:15

Hi Jim,

You have said that you are using a tailstock die holder and used (and quality) dies. But how sharp is the die and is it located co-axially with the work in the holder ?

Screw cutting is an option to start and align the thread but 5BA is small and material can easily flex. An option is to make the threaded end of the shaft longer but with a reduced diameter. The die will start to cut and align itself easier than starting on a full diameter. Then cut off the end to length.

I also used this method on brass when the die did not cut a thread but just reduced the diameter of the shaft.

Paul.

Thread: Making go kart parts
12/01/2021 23:26:57

Hi Nick,

An electric go cart sounds like a good project but answers to your question often go off on a tangent on this site with members not completely understanding your problem. Some photos of the existing rolling chassis, available tools, etc would clarify this.

Cheers, Paul.

Thread: Interest in pictures of models
12/01/2021 23:15:42

Pictures of models are definitely more interesting than which lathe should I buy to the experienced users but important to others so that they can get started in model engineering. Therefore it is up to those who are building or have built a model to post more photos.

The Oxford dictionary describes a model (in an engineering sense) as a three-dimensional representation of a person or thing or of a proposed structure, typically on a smaller scale than the original.

As well as just viewing the articles on the front page under "Latest Forum Posts", older posts can be viewed on a particular topic (Workshop Techniques, 3D printers, Live Steam, Clocks, etc)

Thousands of members photos are on ME but most are in their album and you have to open it to see them. The problem being is that you have to find their post first which gets lost in the past. My 6" scale (half size) model of a Ruston Proctor traction engine is at ** Link **

rus and trailer 2.jpg

Thread: Anyone made an exhaust flapper for one of their models?
12/01/2021 01:51:27

Which models ? (And in the words of one of our red headed polititions "Please Explain" )

Thread: Chester model b fitting new vise
11/01/2021 12:40:18

Unless the keys are a transition or interference fit with the slots in both the vice and table there will always be some mis-alignment, so it is good practice to always push the vice against one side of the table slot as you are tightening the hold down bolts to keep them parallel. Even if the keys in the vice are much smaller than the mill table slots, you can align it fairly accurately by pushing against one side of the slot.

Using the keys to align the vice is only accurate if they are parallel to the jaws in the vice.

Paul

11/01/2021 09:16:08

Martin, Terminology depends on which country and which industry you are in..

https://www.carrlane.com/product/locators/fixture-keys

Paul

 

Edited By Paul Lousick on 11/01/2021 09:19:18

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