Here is a list of all the postings martin perman has made in our forums. Click on a thread name to jump to the thread.
Thread: Brass purchase |
23/12/2018 12:06:48 |
Gentlemen, Where could I buy a piece of Brass 80mm dia x 150mm long please, I looked at a couple of suppliers catalogues but they dont go anywhere near in dia. Thanks, Martin P |
Thread: Gatwick Drone 'Attack' |
21/12/2018 20:26:37 |
Even my meagre knowledge of aviation tells me that an aircraft on take off fully loaded with passengers, fuel and baggage can ill afford the loss of an engine, once they are cruising an engine loss can be covered by the other engine but it still keeps the pilots busy, trying to keep it straight for instance. Years ago I had a friend who worked on Vulcan engines and if a bird went into the intake it could do some very serious damage. Martin P |
Thread: Its that time again |
21/12/2018 17:57:42 |
Gentlemen, As its that time of year again may I wish you all a very Merry Christmas and a Happy New year and I hope all of your pressies are useful. Martin P |
Thread: Reverse thread cutting |
21/12/2018 16:24:34 |
Posted by Ron Laden on 21/12/2018 15:33:52:
Posted by martin perman on 21/12/2018 14:20:57:
Posted by Bazyle on 21/12/2018 13:55:54:
If your lathe can't run backwards or you are worried about the chuck coming loose you really should fit a simple electrical stop switch to the motor that is pushed by the carriage. If you have a lathe that has interlocks like for a chuck guard then check it uses low voltage and wire a plain micro switch into that circuit. If you only have a mains on off control get a sealed switch. google 'limit switch' The Boxford had this as a standard accessory to protect the school lathes from careless children. Thank you Jason, a picture speaks etc, Bazle, my lathe can run in reverse and the chuck bolts to the spindle back plate, this would make thread cutting less panicky as I dont have split nuts and no thread dial. Martin P Which lathe do you have Martin
I have a Clarke CL500M which does nicely for me, Martin P |
21/12/2018 14:20:57 |
Posted by Bazyle on 21/12/2018 13:55:54:
If your lathe can't run backwards or you are worried about the chuck coming loose you really should fit a simple electrical stop switch to the motor that is pushed by the carriage. If you have a lathe that has interlocks like for a chuck guard then check it uses low voltage and wire a plain micro switch into that circuit. If you only have a mains on off control get a sealed switch. google 'limit switch' The Boxford had this as a standard accessory to protect the school lathes from careless children. Thank you Jason, a picture speaks etc, Bazle, my lathe can run in reverse and the chuck bolts to the spindle back plate, this would make thread cutting less panicky as I dont have split nuts and no thread dial. Martin P |
21/12/2018 13:07:12 |
Posted by not done it yet on 21/12/2018 12:49:41:
He means starting where you would normally stop the carriage. Nothing more difficult than that to imagine.... Cutting the thread with the lead screw running in the opposite direction. Try it. Your only fear then will be running into the tailstock - if you bother to use it to support the workpiece. So do I assume the chuck runs backward and the tool is upside down or is the tool mounted on the other side of the work piece. Not so easy to imagine. Martin P |
Thread: Gatwick Drone 'Attack' |
21/12/2018 12:41:02 |
Posted by Watford on 21/12/2018 12:32:18:
Drone(s) not shot down because of the risk of a stray bullet, we learn. Who ever does these 'risk assessments' and then allows armed police with (presumably loaded) weapons to roam around the very crowded concourse just a few hundred yards away?
Mike I would assume that armed police in the building would have a specific target which in most cases would stop the bullet, firing at a moving target is not so easy, even if you hit the drone the bullet would still have some force behind it and it would then randomly fall with the possibility of hitting something else. Martin P Edited By martin perman on 21/12/2018 12:41:41 |
21/12/2018 12:41:01 |
Posted by Watford on 21/12/2018 12:32:18:
Drone(s) not shot down because of the risk of a stray bullet, we learn. Who ever does these 'risk assessments' and then allows armed police with (presumably loaded) weapons to roam around the very crowded concourse just a few hundred yards away?
Mike I would assume that armed police in the building would have a specific target which in most cases would stop the bullet, firing at a moving target is not so easy,even if you hit the drone the bullet would still have some force behind it and it would then randomly fall with the possibility of hitting something else. Martin P |
Thread: Reverse thread cutting |
21/12/2018 12:20:33 |
Gentlemen, Having read the post regarding the Mini lathe repair there was mention of "reverse thread cutting" can anybody, Jason Martin P Edited By martin perman on 21/12/2018 12:21:20 |
Thread: Modern efficiency !!!!!!!!! |
21/12/2018 08:47:13 |
I run a 4 x 4 diesel estate for several reasons, economy, I have to get my wifes mobility scooter in the back but the main reason is my hobby, I attend steam rally's with my stationary engines so need to tow a trailer and having a 4 x 4 gives me a better chance of moving around on wet fields, I dont see an electric vehicle, that I can afford, that would be capable of my needs because most of my battery usage would go getting out of fields and pulling up to 1.5 tons. A van would be of no use because we are a one vehicle household and my wife cant get in one because of her medical problems. Martin P |
Thread: Combi Boiler fault finding |
20/12/2018 19:33:38 |
Posted by John Rudd on 20/12/2018 19:29:09:
Martin, TRV = Thermostatic Radiator Valve.... Thanks John, I have seven of those then. Martin P |
20/12/2018 18:57:56 |
Posted by Neil Wyatt on 20/12/2018 18:49:34:
Posted by SillyOldDuffer on 20/12/2018 18:10:03:
Posted by martin perman on 20/12/2018 15:37:11:
Posted by SillyOldDuffer on 20/12/2018 13:57:08:
Posted by pgk pgk on 18/12/2018 21:48:30:
Getting off topic I know but woodburners and open fires sound cosy but ... pgk The other problem is that they make the rest of the house colder! ... Whilst I dont disbelieve what you have said could you explain why when we used to have a coal fire lit in the front room we had to turn the central heating off because it was so damn hot in the house and our bedroom was always toasty from the heat from the chimney breast which was above the room with the fire in. ... Unless the thermostat is in the same room as the coal fire a central heating system will carry on heating the room as well. Two major sources of heat will certainly keep a room cosy. True a coal fire will warm a room and - to a limited extent - the room above. If you live in a semi-detached the neighbours get a free boost too.
Main stat should be in a room with no TRV and no other major heat source. Rad in a room with a coal fire should have a TRV Neil
I dont have any thermostats in the house except for the ones fitted to the radiators and the boiler internal ones and havent a clue what a TRV is as I dont speak acronym. Martin P Edited By martin perman on 20/12/2018 18:58:45 |
Thread: Gatwick Drone 'Attack' |
20/12/2018 18:51:43 |
It would make finding the operator easier to spot because he would be red and white. |
Thread: Fantastic Vacuum Engine |
20/12/2018 15:40:45 |
Is a vacuum engine another word for flame licker. Martin P |
Thread: Combi Boiler fault finding |
20/12/2018 15:37:11 |
Posted by SillyOldDuffer on 20/12/2018 13:57:08:
Posted by pgk pgk on 18/12/2018 21:48:30:
Getting off topic I know but woodburners and open fires sound cosy but ... pgk The other problem is that they make the rest of the house colder! Central heating systems are thermally far more effective than open fires for two reasons:
In contrast a far smaller proportion of the heat goes up the chimney from a central heating boiler, and hot water is directed into the living spaces where the warmth is needed. Once it's got there, the waste due to air-flow is minimised and it's much less likely that cold air will be pulled inside. An open fire is a pump for replacing warm air with cold. The pumping effect is so strong that coal mines were once commonly ventilated by furnaces. Though it looks charming and is simple, burning wood or coal in a hearth is a poo heating system. Dave Edited By SillyOldDuffer on 20/12/2018 13:58:50 Whilst I dont disbelieve what you have said could you explain why when we used to have a coal fire lit in the front room we had to turn the central heating off because it was so damn hot in the house and our bedroom was always toasty from the heat from the chimney breast which was above the room with the fire in. The house has cavity wall insulation, 300 mm of loft insulation and double glazed through out. Martin P Martin P |
Thread: Modern efficiency !!!!!!!!! |
19/12/2018 11:10:17 |
Regardless of the cost and the week without it, nearest dealership is 30 miles away, I collected the car from the garage this morning and as soon as I turned the key I found that I had a different engine so the issue had been brewing over time. Martin P |
19/12/2018 10:55:57 |
Posted by Neil Wyatt on 18/12/2018 22:40:26:
Posted by martin perman on 18/12/2018 20:40:32:
Posted by Neil Wyatt on 18/12/2018 20:26:29:
Posted by martin perman on 18/12/2018 20:14:52:
After a long run, like Scotland and back, where I get about 67mpg, I put redex in the next tank and accelerate using lower gears than normal. Also, when there's no one behind me I drop the clutch and let rev limiter kick in - three or four of those blow all the crud out of the system and don't really waste a lot of fuel. Neil So to overcome one issue you are keeping addative, timing belts and clutch manufacturers in business in the long term. An endless circle. Em... dropping the clutch top briefly rev the engine doesn't wear it out, and the engine has a timing chain. I did say long term, does it have one of those sprung flywheels where the springs break and chains do stretch Edited By martin perman on 19/12/2018 10:56:52 Edited By martin perman on 19/12/2018 10:57:32 |
18/12/2018 20:40:32 |
Posted by Neil Wyatt on 18/12/2018 20:26:29:
Posted by martin perman on 18/12/2018 20:14:52:
After a long run, like Scotland and back, where I get about 67mpg, I put redex in the next tank and accelerate using lower gears than normal. Also, when there's no one behind me I drop the clutch and let rev limiter kick in - three or four of those blow all the crud out of the system and don't really waste a lot of fuel. Neil So to overcome one issue you are keeping addative, timing belts and clutch manufacturers in business in the long term. An endless circle. |
18/12/2018 20:14:52 |
Reading the thread about combi boilers makes me think that saving the planet is becoming a bit silly, I dont disagree with the basic premise but its costing us individuals lots of money. I'm collecting my car from the dealer garage tomorrow where its been for the last week because the Catalytic Converter light came on followed by the management light, the traction control and cruise control also failed all because of the DPF failing and it failed because I who prides himself in acheiving the best MPG, doesnt break speed limits, doesnt thrash his car enough to burn the filter clean, so trying to save fuel and drive carefully is about to cost me £507, basically I give up and whats the point of trying. Rant over. Martin P |
Thread: Combi Boiler fault finding |
18/12/2018 19:50:08 |
Thats sorted then I shall get my two open fire chimneys swept and use the coal fires again. what happens when an oap's boiler fails and he cant afford a new one with all the stuff he supposedly needs.
Martin P |
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
Sign up to our newsletter and get a free digital issue.
You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy
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.