Hi Everyone,
I recently got a $3000+ water bill from Sydney Water which made me really sad. However, that was not the worst thing – I hired a Leak Detector to detect the leak (cost $400) and then hired a plumber to replace the pipeline (cost $1600) – guess what happened? The leak remained!
I...
we've been looking at two different programs and wanted to get some feedback from fellow dirt bunnies. Our company has been doing nothing but bid for the last three years, and about out of every 50-60 jobs bid, we will get one. I'm spending 7/8 of my time stuck in front of my screen instead of...
I am currently quoting a job where the customer has requested they be installed in the block wall. My experience with this while working in the field has been it's very time consuming and lots of varying factors in Masonry cost calculator. Does anyone have a labor hour number that has worked...
@Rocupe Anyone here ever connect an electric motor to an engine? I could use some help. The motor is an AC-35 and I want to couple it to an engine. I don't have access to a CNC machine or even a decent machine shop here where I live. Is there anyone who might be able to help have one built? I...
@wbd The following paragraph was copied from Theodore Wildi's textbook:
When a single synchronous generator feeds a variable load, we are interested in knowing how the terminal voltage E changes as a function of the load current I. The relationship between E and I is called the regulation...
@sarclee Whenever I want to put a satellite relay network into orbit I like to use resonant orbits to make sure the satellites are evenly spaced but to find the resonant orbit I've been doing it by trial and error rather than calculating it. I'd get 2 ships, one in the target orbit and another...
I can't get any straight answers from builders, roofers, or suppliers. Can it be true, that the more money you have the more expensive the roofing you get- even if they all are guaranteed for the same 40 years??
Is one quieter in storms? (I have NO attic, but will be well insulated).
Standing...
@tommatwalker
hi:waving:
am new in the forum
I have a problem with a dc drive
let me start with the application
it's a centrifugal force pump that runs with a dc motor without a gearbox, the operation speed is 1300 rpm working 24/7
the problem is the speed drops from 1300 rpm to 200 rpm...
@mpradhan
Hello. I also want some help
"Physical modeling of prepared strings
Preparation is based on mathematical modeling of 2 basic elements; strings which can be configured as bars, and a rattling element. Each voice has a pair of strings connected by a rattle that reacts to the vibrations...
Basically, what is the best concrete you could make for footings? Assuming average ground conditions. (I've got clay and gravel, need a pick to dig it up.)
P.S. I'm not actually sure there is a best as such. Maybe there is just a concrete mix for footings ( I think 1:6 using all-in ballast)...
I have a change of use on the go and need to fill a grip in some concrete. It's approx 2 " deep at one side feathering away to nothing at the other side about 45 ft long, so, not a huge volume.
The area is going to become a wet tipping area for grain so will need to be hard-wearing and resistant...
I'm about to replace two small deck surfaces over living areas, and perhaps convert another large deck to waterproof construction to allow storage underneath.
What's common here (and the one that needs replacing) is fabric layers embedded in acrylic latex, followed by a topcoat. Relatively easy...
a few years ago we got a Jackson welding helmet from Fastenal esab sentinel a50 review, supposed to go from 9 to 13. I think it's coming to the end of its usefulness, so I grabbed the old fixed shade spare helmet, a lot better, so for occasional use what works> I was looking at harbor freight...
So in a coilgun, I need to know how long the electromagnetic field has to be to propel a .336kg mass at 500m/s^2 (a force of 168N) in each coil
There are five coils, each one 1m apart strength of the electric field.
What's the formula to achieve the necessary em field strength to propel the...
I have been wrenching on farmer's older tractors for years and liability insurance hasn't been a concern. I have though recently began performing some repair work for a multinational aluminum plant on their scrap trailer tipper trucks and a Broce broom. I was called about a failed fifth wheel...
