I am involved in the grinding & polishing of Hydraulically pressed concrete paver slabs (called pavings flags) here where I work in Yorkshire.
The issue I am trying to solve is to establish the actual surface finish we achieve. We measure flatness of the slab (the size varies but up to 600mmm x...
Has anyone seen FEARNS rotary slide rules.
I got one sone years ago that calculates the volume of cylindrical vessel with flat ends, domed ends (concave or convex ON ITS SIDE like you would have with a storage tank.
You dial in the dimensions (Metric) the actual depth of liquid & it gives the...
If you leave your existing job -try to leave with a good relationship, most employers ring & ask for references - if you create bad feling this can follow you for a long time.
Also having a good source of a reference can be the key to getting a job later on in life
Bruce L Farrar.
Works...
I have accessed the site for the commercial water generators, fair play guys I have learnt something I wasnt aware of.
Refering back to the original question this product is not quite the same in terms of recovering energy to drive the device (which simply cannot be done due to inefficiencies)...
If you can get the makers data for the compressors that would be a good start.
You need to access a UK government "Department of the Environment" department doucument
Good Practice Guide 126 - Compressing Air Costs
Contact
ETSU
Harwell
Didcot
Oxfordshire
OX11 0RA
tel 01235 436747
Cost was £3...
The coefficiaent is independant of surface area, the actual efficiency of device is dependant on the surface area - hence bigger brakes on faster cars.
Bruce L Farrar.
Works Engineering Manager
Marshalls Mono PLC.Brookfoot Works.
Halifax W.Yorks UK
Compressing air whatever the humidity means the air is heated up, cooling this in a heat exchanger presumably at the same pressure will put air through dew point & dry or de humidify the air this water can be drained off with a slight loss of pressure.
The condensate will be water with all the...
If the fuel is going to be run through a diesel engine - the contamination & failure of the pumps & injectors will outway any savings made in re-using filters.
If the diesel fuel isnt going into a compression injection engine then maybe rig with a filter casing with revers flow may be a method...
Fly wheel mass (wieght) is a critical factor - lighter materials (eg alloys) store less energy than steel or cast iron.
This can be calculated using the center of gravity of the cross section referenced to the distance away from axis of rotation & is proprtional to rotational speed (rev/min) &...
The basic rule for length of thread engagement is at least on to one & a half time the diameter of the thread.
Very critical on alloys that this is not reduced.
The actual tensile strength of a fastener is well shown in most screw makers data sheets, but it must be realsied that the fastener...
I have used CIBA Geigy Araladite on many tasks with very good results. They have both quick setting & standard (4 hours).
If the joint is a safety critical joint you may want to speak to their technical people, remember adhesives such as these work on aero structures & can join differing...
If you want lock washers that do work try Schnorr Washers - these do the business & are fitted to tiens that are critical - such as parts in printing machines & aerospace where detachment of even the screw or nut into the mechanism is not an option.
Search the webfor a local supplier
Bruce L...
The question I ask is what do you want to use the vacuum for?
What do you want to evacuate?
as what ever you pull in will mix with the diesel & contaminate it.
If you want a source of info on air operate ejectors look at the HMC Brauer site. Thier comressed air ejectors are impressive
Steam...
What I am looking for is very much like a length of "firehose" with both ends closed off with a small tume installed to allow the entry of compressed air.
I have found a comany a few mile where I am based that uses these for closing doors (Rolladoor) they have given me some help - but it would...
Thanks for the data Guys
The type of flat tube cylinder I have seen & used is quitre small - say 4 0r 5 inches long & 1-1/4" wide & will inflate to a round sate if not contained in a mechanism I am looking at building these into a device to move 10mm max.
The whols idea of air cylinedrs of this...
