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Thanks poetix! I'll follow your advice Sandro

poetix, thanks, Do you know where we could buy one of those small turbines? A used one will be better. It should operate in the middle of the jungle. Thanks again Sandro

Thanks msonnet! I have asked for a quote at spilling. If their price is not very high, and its service is easy, we will recommend it. When our client showed us a quote to imported this engines, but still asked us to build them, we didnt understand the logic, like you wrote. However, this...

I really don’t know much about power plants, but I have some experience with variable torque systems: Since generators are synchronous motors, they are like "geared" electrically to the frequency of the net. Lets suppose that the total loses of the turbine and motor when turning at...

I am afraid I am being object of a practical joke. I thought that until I saw the proposal from South American company offering my client the thing he asked for: A steam engine (with a 16 inch piston) working at 250 psi used to move an electrical generator. I thought that these times were...

Massey, Is there any specific reason why you have to avoid sealings? Is "use SSTRB" a designer's specification? Since your application calls for a tappered roller bearing, your load is not so light. I would prefer to use a lip seal, with some kind of laberinth, and the whole roller...

There are two sceneries The most common, you know the weight of the roll. It is straightforward, since you most possibly know the width, and weight per area. The special case, you know the length, but don’t know the final diameter of your roll, or you know the diameter but would like to know...

Les, Sorry for the delay, but, I wasnt around. If you are using a standard bolt (60 degrees) and, strokersix is right (I hope he is, since I used his formulas myself), I dont recomend you use that method to estimate the force. a 10% efficiency in the torque/force conversion, could give you an...

Hippo, Thanks!, What's your email? sancat

Thanks for your answers, Matched or paired bearings are those manufactured toghether and "paired" at the factory so each would take an equal amount of load. They are suppossed to work as one, and the set is supposedly able to carry a 162% higher load. We will use the bearings to...

Hi Les, English units are so complicated, that I prefer to translate to metric, and back. 236lb.ft are 320 N.m 20 pitch is 1.27mm per thread your screw diameter seems 36.5mm (20 seems a lot of tpi for an acme 36.5mm diameter!!) Your nut diameter is 39.9mm, and therefore I would asume Rt is...

Haf, I understand you have a plate, with some thickness, say 1 inch, and 6 inches deep. If you do cut it with EDM, and finish it with a loop, I think you will have your intended effect, it will have a higher load capacity downwards that upwards but if you only think about 1st order stability. If...

Dear friends, We have a design problem, where we have to fit in a constrained space an approximate load capacity of 12800 N. One of the alternatives will be to use a pair of 6201 series bearing working side by side. Yes, we know we can use a paired match, and that the dynamic load would be...

Two things come up to my mind: What about flexo-torsional buckling? If the load will be applied on one extreme of the beam, you could have failure due to this kind of buckling. An H shape has a not so high torsional stiffness, a T shape has even less. An I have experienced the same that Henery...

Dear Friends, We have been requested to design a cookie feeder for a chocolate bathing machine. Our design includes a large tray, 1600x820mm, with a 10% slope towards the direction that we want the cookies to move. The tray will be made in Stainless Steel 2mm thick, and will be moved by a...

I was just wondering, a 60kg/m rail (120lbs/yd) will have a section of 7650 mm2, and for a 1/1000 stretch will need a force of 160,000 kgs. If we assume that the zero stretch temp is just in the middle of the temp range, that will mean 80 tons in compression or tension depending on cold or hot...

Just as a curiosity, how will the heat move from your cooling plate to your tested device in the vacuum? I think that most of the heat a device in space receives or loses is transported by infrarred radiation, so you would need an infrarred lamp to heat it, and lots of time at a VERY COLD...

Thanks for your inputs! We think we will use one of the suggested alternatives. Thanks again sancat

I would suggest you plough the intended material using your shovel pulling it with a hand spring weighter, so to measure the drag force. With that force, multiplied by the tangential speed of the central part of your shovel times the quantity of shovels involved could give you an initial idea...

One way to reduce the stress concentration would be to use a Very Large radius on both ends of your support blocks. Due to the load you are applying the shaft flexes, thus, it would need a slightly bigger diameter, and a bending radius to accomodate this effect. I dont know the diameter of your...