Here is a list of all the postings Reg Rossiter has made in our forums. Click on a thread name to jump to the thread.
Thread: Email from CuP Alloys? | |
09/08/2022 07:40:19 | |
I believe that their email address has been compromised in some way. I think someone in a Facebook group had received something similar. Reg | |
Thread: Bodywork for Martin Evans Firefly in 5" Gauge | |
28/06/2022 09:45:03 | |
Brian, I have just spoken to Ed at MEL and they are actually in the process of doing the drawings for the Firefly tanks and cab in 3.5" gauge. They will follow the usual format of slots and tabs for quick and accurate construction. If your friend would like to contact Ed he will be very happy to help with your friend's 5" gauge version. I hope this is of help, Reg | |
Thread: Engine thermodynamics | |
04/03/2021 10:25:10 | |
Posted by Nigel Graham 2 on 03/03/2021 21:10:28:
I don't know if anyone has made indicators for miniature steam engines; either mechanical like the Dobby-McInnes instrument or based on a piezo-electric transducer connected to a charge amplifier and associated electronics. The latter system originated in the 1930s or 40s for testing i.c. engines. Could be an interesting project though! Station Road Steam have produced a digital dynamometer / indicator. Here's the link (if it works) https://www.stationroadsteam.com/ddi/ Reg | |
Thread: crane uprate - where would you add some metal ? | |
10/02/2021 19:14:02 | |
One thing to be aware of with any lifting operation using a crane, including the type under discussion, is that as soon as the load is off the floor the mass of the load is effectively at the end of the boom where the fall attaches. In the case of an engine hoist that means the mass of your 200kg lathe you're lifting is now in effect about 1.5 metres in the air. Move it at your own peril! Reg | |
Thread: Helping hand wanted | |
23/12/2020 17:08:37 | |
Richard, You are well served for clubs in the North East with Tyneside, Sunderland, South Durham, Chester Le Street and another in Teesside. Before spending on a scale coupling you need to be sure your local club accepts this type. Some clubs insist upon a solid drawbar and clevis type. Blackgates sell various types of couplings. I think 17D miniatures sell buffers. You might not have many options for brakes and have to make them. I'm in Crook DL15 and have a pile of older Model Engineer magazines you can have for free. They are a tremendous source of information for the beginner. I have them in a shed so no need to break the Tier 3 rules. Reg | |
Thread: Myford 254 faceplate options | |
25/08/2020 16:01:43 | |
My Myford 254S doesn't have a catch plate. It has a pin which goes in one of the chuck retaining bolt holes. I think I purchased it from RDG several years ago. Reg | |
Thread: First loco steel choice | |
14/02/2020 08:25:02 | |
Hi Jason, So far, I haven't had any problems machining anything from M.E.L. However, I always use sharp tools otherwise it can end up looking like a ploughed field. Reg | |
13/02/2020 18:18:33 | |
Ian, Model Engineers Laser do quite a few laser cut bits for Juliet. A pair of accurately cut frames will set you off on the right track if nothing else. http://modelengineerslaser.co.uk/locoparts.aspx?loconum=276&locotype=4 Reg | |
Thread: The cultural status of engineers in the UK | |
11/01/2020 15:47:17 | |
To become a Chief Engineer Officer at sea you require a Certificate of Competency, a process that can be expected to take about ten years. A degree will get you exemptions to some of the academic subjects but won't get you your 'ticket'. Reg | |
Thread: Hello from the North East | |
21/12/2019 09:48:45 | |
Hello Paul, Where abouts in Weardale are you? I used to live in Frosterley and went to school in Wolsingham. If I hear of any suitable lathes locally I will let you know. | |
Thread: Model Enginner Binders availability | |
10/12/2019 17:17:15 | |
I asked Mags UK yesterday and they replied:
Edited By Reg Rossiter on 10/12/2019 17:17:43 Edited By Reg Rossiter on 10/12/2019 17:18:26 | |
Thread: Hello from the North East | |
07/12/2019 12:07:11 | |
SP I'm just up the road in Crook and would happily supply you with lots of older copies of Model Engineer to give you hours of reading pleasure over the Christmas holidays. RGR | |
Thread: Pressure gauge help needed please. | |
27/04/2019 11:37:12 | |
Standard marine practice is to use a needle valve before the gauge. It's merely a case of screwing the valve in until the oscillation of the pointer becomes acceptable while taking care to ensure the valve isn't shut off tight. You might get an acceptable result using a very fine orifice before the gauge instead. Reg | |
Thread: Tube Seam | |
17/02/2019 18:37:19 | |
The word Nominal needs to be taken into account when looking at piping. Yes, there is a cross-over of terminology, however in the real world, especially in something like hydraulic systems you always order tube. The oil and gas industry certainly tends to differentiate between pipe and tube, as does the shipping industry. As recently as last year the ECITB mechanical engineering exam contained a question aimed at the candidate differentiating between pipe and tubing. At the end of the day you can call it whatever you want but before you place an order for thousands of pounds worth of the stuff you'd better make sure that you and your supplier are using the same terminology. So far, I've had no issues with orders. Reg | |
17/02/2019 15:34:34 | |
Paul Lousick is quite correct. In the UK tubes are sized on their OD while pipes are sized on their bore. Reg | |
Thread: releasing tapers | |
12/02/2019 12:02:16 | |
RePosted by not done it yet on 11/02/2019 08:26:08: Look guys, I know the drive should be friction between the tapers, but answer me this: Why was a tang fitted, when a dome (or even flat surface) would have sufficed as a point of action for the wedge? Why was the drill only able to be inserted in that orientaion. In other words, was the tang a poor design or was it there as a back up tell-tale sign (that all was not well) before the taper surfaces were totally screwed up? I’m not a mechanical engineer, so please give me a good design reason why the tang was developed in that shape, ‘cos those guys that designed it had a good reason for that shape. If it would have been better just flat topped, that is how they would have done it - simpler and faster not to have to locate the tang in the spindle slot, for instance.
The reason a tang is preferable to a domed or flat surface is down to maintaining the strength of the spindle. In order to use a taper drift you have to put a slot right through the spindle which weakens it. If you were going for the domed or flat ended option you would have to continue the round, tapered bore up into the ejector slot. Therefore at this point in the spindle you would have a round bore and a slot reducing the cross sectional area of the spindle and therefore the strength. Using a tang means that the tapered bore stops as the tang slot starts and leaves the spindle stronger. Reg | |
Thread: Milling Machine | |
09/03/2017 19:44:53 | |
I have had a Warco VMC for quite a few years and have never thought I wish I'd got something else. Reg | |
Thread: Steam engine with centrifugal pump Pictures | |
09/03/2017 19:40:32 | |
What many people may not appreciate is that even now you can usually find a steam up and downer stripping pump and steam turbine driven cargo pumps in many petroleum tankers. I'm talking ships here, not trucks. Double inlet pumps are the norm in large sizes. They aid throughput and balance axial forces. As for the use of steam, steam stripping pumps are safe in a potentially hazardous environment where you don't want electricity. Cargo pumps usually have their prime mover outside the pump room, in the engine room. Steam turbines are often used because that puts load on the boilers to produce plenty of inert gas for blanketing the cargo tanks as cargo is discharged. Electric drives can be used but then you may need a separate inert gas generator. Reg | |
Thread: Why is the lift so small on water pump ball valves? | |
06/02/2017 14:22:50 | |
For full flow the lift need only be the diameter of the seat divided by 4. In your case 1/32" lift would give full flow on a 1/8" seat diameter. | |
Thread: Optical chucks | |
31/01/2017 09:40:50 | |
I use a laser edge / centre finder. http://littlemachineshop.com/products/product_view.php?ProductID=2604 Reg |
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