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Thanks Guys, Flat bearings might just do the trick. Cheers, Marc

I have a rack of solar panels at 15 deg to vertical, that will be rotating about the vertical axis and haven't really done any bearing selection in quite some time. The weight of the rack and panels is about 4000 lbs. The question is, what type of bearings should I use for this application...

How cold does it get where you are? What I've seen commonly done is to have the solar panels also drive an extra pump, and have the water pumped up to the solar panels through small well insulated piping. The piping is then run under the solar cells and the radient heat from the solar cells is...

Alright, I got some answers to the questions that were asked and soome more particulars about the problem. First, I can't have any steam coming out of the system because it has been installed close to an airport and there are really strict regulations about the times when steam is coming out of...

Hi all, I have a machine that is generating steam at atmospheric pressure. The steam passes along about 10 feet of piping and then through a series of condensers. After leaving the condensers, the steam continues to flow out of the system and eventually into the atmosphere. The steam at...

Does anyone know how to relate the horsepower and cfm of a centrifugal pump to a positive displacement pump? Are there any conversion factors to relate the two in terms of the amount of liquid that can be picked up by each one for a given height? thanks Marc

Anyone know the benefits to using a hydrostatic drive over just an auxillary engine. I'm updating a vacuum truck and am thinking about using a hyrdostatic drive instead of an auxillary engine, so any poblems that are commonly found would be good to know as well. Thanks

A software package that I have used to design gears is TK Solver. I'm sure there may be better ones out there, but Tk Solver can pretty much do it all including forces, stresses, bending, fatigue, etc. calcs from design parameters that you put in. As a bonus it is pretty user friendly. We...

I tried a very tacky grease that I got from a local supplier but, the stuff flew off after a short testing period. The gears are helical so everything was nice and queit but the heat readings shot up after a couple hours and I had to stop. Opened up the casing and found steaming, fairly dry...

Is there any type of grease product that can be put into a enclosed gearbox, (not sealed, just protection from the elements) so that once the unit is put together I wouldn't have to add more grease for the life of the box. I'm trying to avoid using semifluids mainly because I don't want to...

That's what I was doing I just wasn't sure if it was the right way to do the calcs. Thanks for the help....if anyone knows of any web sites that have various gear ratios that would be great....I'll keep trying on my own though. Thanks again Marc

I need to know the basic method for calculating torque at the flywheel and the wheels of a car. Any car will do, I have the gear ratios inside the transmission but need to know the ratios in the diff. I then need to determine (assuming no losses or any kind of torque conversion device) the...

Thanks for the help I have already begun looking for an architect or structural engineer who is local and has designed similar signs before. Obviously this will be necessary to get the permit. I wanted to get a head start and already have the simple calculations done to move the project...

I am a mechanical engineer and have been given some sturctural work to do. We are erecting a 30 ft. tall sign that is 8 ft. wide and about 15 in thick. It's one of those large sign that you see outside of a plaza/stripmall. It's supported by two square posts that are about 12 in X 12 in. I...

I've been talking to water softening companies and showed some of them the lab results for the composition of the fluid. They have said that using a water softener with water softening salt will do the trick. They've said that a water softener could lower the Calcium and Magnesium levels in...

Thanks for getting back so quickly. I've done some more investigating and found that the Calcium and Magnesium levels are around 1100 mg/L. I need to get those down to around 100 mg/L. In the recycling process there is quite of a bit of filtration and the final product is actually distilled...

I am recycling recovered glycol (ethylene, aircraft deicing fluid) and turning it into automotive antifreeze. The only problem I have is that the antifreeze is needs to be softened to meet some manufacturer's automotive spec. I am a mechanical engineer and not too proficient with chemistry...

We are doing research trying to concentrate glycol up to about 8-10% using an RO unit. Just wondering if anyone knows of anyone who is currently doing this that we can contact for more information on how to go about it. At the same time we are removing glycol from .05-.2% EG solution and...

I am doing tests on concentrating airport glycol and was wondering what exactly a "dalton" represents. I came across the term while trying to learn more about how the systems work. If anyone has any information on RO units or can help me with the unit it would be a great help.