Member postings for martin perman

Geoff,

you said in your first post you had loaded some pictures, I've looked at all of your albums but can see nothing related to coffee .

Martin P

Near where I live is the village/small town of Potton where its original station still stands, a road, originally a railway bridge stands at one end of the platform and an industrial estate stands at the other end, the platform still has the steel platform cover, minus its glass, a section of track and signs and the station is now a house and lived in by a transport enthusiast, it also still has its original car park at the front.

Martin P

Edited By martin perman on 11/01/2015 13:56:41

Neil,

A very interesting read, a friend of mine designed and built a telescope tracking device years ago, I am seeing him on Tuesday night so will ask himwhat he did.

Martin P

Callum,

That is correct, I install RO systems to work with my companies equipment in laboratory's where the customer wants a control of say pH and uS and to do this the water comes from an RO system and then sea salt, uS, is added along with Bicarbonate of Soda, pH, this then gives them a controlled solution for experiments to work from, RO water is also very expensive as for every litre of RO made three litres of water goes down the drain as waste.

Martin P

Reverse osmosis plants remove all solids and chemicals and leave a liquid which can then be treated with a known amount of chemical/ solid which can be controlled. Depending on what your cutting you require an abrasive in the water to do the cutting, metal cutting uses diamond dust to abrade the metal for instance.

Martin P

If you look at a ground and lapped surface under a strong microscope it appears to be like a mountain range, if it had oil on its surface then any molecular film would fill the gaps allowing the larger raised area to be "oil free" after a clean.

Martin P

Gentlemen,

When I did my apprenticeship over forty years ago we had a very good toolmaker turned apprentice instructor who could be very pedantic in what he did or said but you couldn't fault him, one of the best.

He taught grinding etc mostly and when we had to use Slip Gauges/Gauge blocks he drove a routine into us, when opening the box you cleaned each slip to remove the oil before they were rung, after using them you wiped them over with a lightly oiled cloth to remove finger prints and dirt before they went back in there place in the box, when in use they had to be kept on a piece of Baize away from your work unless being used.

Martin P

Michael,

I dont work with such big equipment but I can relate, I have to write method statements and have also assembled robots in the evening because the two pairs of braces and belts man has gone home.

Martin P

ventilation is important as they can get warm, the ones I use at work are designed to be built into their own control cabinets, so as suggested need protecting from you

Martin P

Gentlemen,

A slight aside, If your having difficulty trying to undo a Hex head thats been "rung" with an allen key get a suitable sized ball pein hammer and using the ball tap on the head of the bolt around the hex, then take your allen key and tap into hole remaking the hex then you will hopefully undo the bolt.

Martin P

Roger,

You havent been able to use a ladder on building sites or anywhere to gain height for ages unless there is no other way to climb, today its mobile scaffolding, podium steps and the like, all need courses and all need a tag system that has to be signed daily by a qualified person to say its been checked and is fit for use. If you have to use a ladder then it has to use the tag system and has to be tied off at the top to something that is fixed, the catch 22 is that you cant climb it to tie it off

I'm a "trained" mobile scaffold erector and my licence only lasts a few years and then we do it again, you cant get onto a construction site without shed loads of courses under your belt and you have to do them if you want to work, fortunately my job pays for it all. You now have to pay for common sense.

Martin P

Gentlemen,

I've just been looking at the Frost bender with the aim of ordering one and I've just spotted a little problem with the description, when you find the item it states 50mm x 6mm, if you scroll down to the description this dimension drops to 40mm x 4mm, I have just rung frosts and they say the latter is correct and will modify the listing of 50mm x 6mm.

Martin P

Back at Duxford, a fellow volunteer and I were given the task of checking and inflating any tyres on the aircraft exhibits, we took the compressed air trolley around every aircraft topping up where necessary until we got the the BAC Lightning, we connected the bottles to one of the main undercarriage wheels and to our surprise the pressure of the bottles increased, back to our crew chief to report and his response was oop's should have told you to leave them they are much higher pressure than everything else.

Martin P

twenty five years ago I was a volunteer for the Imperial War Museum at Duxford and I was part of a seven man team who restored "Mary Alice" the museums B17G Flying Fortress, our Crew Chief was an employee of the museum and a seriously qualified Aircraft engineer asked me to remove the CO2 fire extinguisher cylinders from under the Pilot/Copilots seating area, he had checked them, I crawled into the space, not very big, via the front hatch and proceeded to remove them and the pipework until I released the pipework of one when with a loud pop I was sitting in freezing fog with my right hand on fire, I was holding the cylinder by the neck with my thumb and fore finger wrapped around it and now was frozen to the neck, I couldnt see a thing at all and aimed the cylinder to where I thought the hatch was and lobbed it out closely followed by me to watch the cylinder spin on the floor for a minute until it emptied.

Most of the crew fell about laughing as all they could see was steam leaking from every orifice it could around the fuselage and me screaming. The crew cheif sent me of to get my hand looked at and he decided he would check them again before I took anymore out.

Martin P

As an engineering Technician apprentice we were taught how to use Oxy/Acetelene cylinders correctly and part of this was to watch British Gas supplied safety films, one I will always remember was a small ramp with the Oxygen cylinder laid with the valve at the bottom, the valve was knocked off with a sledge hammer and the cylinder left the ramp like a missile and carried quite a distance, another cylinder was over pressured until the cylinder body split open and almost became a flat sheet.

Martin P

Robin,

I the hob works the best thing will be it will only heat where the object contacts so no heating unnecessarily.

Martin P

I was always led to believe they were for thread repair and the screw was for just holding the parts in place.

Martin P

Gentlemen,

Sorry if i'm teaching grannies but when I worked at Lucas CAV it wasnt unusual to send workers to the local hospital because when testing the fuel injectors the operators would accidentally inject themselves which would cause very bad swelling and pain, if you must wipe the nozzle use a brush.

Martin P

If you are using taper roller bearing then apart from removing play then thats all you need to do, if they are angular contact ball bearings then you need to tighten them to a required torque based on the differential dimension between the inner and outer spacers, run your spindle to allow it to warm up and make sure the bearings are well oiled after a while stop the lathe and check for end float and adjust accordingly, treat taper roller bearings like you would on the front wheels of a car, no play but well oiled, use for a while and then check for play.

Martin P

Gentlemen,

A friend of mine has a Junkers of similar design except the top set of pistons are connected by linkage to the crank and get pulled down as the crank brings the pistons up to compression, he used to rally it but its not been out for years.

Locally we have a commer owner who rally's the truck with a TS3 as its load which he runs up for the public, always reminds me of a racing engine with its noise.

Go to this link to see Fairbanks Morse engines in US Submarines http://en.wikipedia.org/wiki/Fairbanks_Morse_38_8-1/8_diesel_engine  

Martin P

Edited By martin perman on 03/01/2015 16:13:49