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KurtKrDU: I don't understand. You could tell me who makes what I am looking for, or you could make it? And why would answering the question not be allowed? I don't know of any posting rules that would prevent it. Thanks.

A few years ago I got a sample pack of really cool composite strips. I think that there were four strips in the pack and they were about 1" x 4" x .05" thick. The cool thing about them was that each strip had the filaments laid in a specific direction so that each one had completely different...

Does anyone have a method (spreadsheet, software package, manual calculation template, etc) for calculating the necessary size of an automotive airconditioning system? I need to take into account the solar load through the windows and body, occupant heat, etc. I am working on a supplimental...

SMF1964: I think that your last statement is accurate. I consider the environment, driver, and load to be unchangeable. I need a material that can withstand the various inputs as they exist now. I really think that the engine characteristics must have something to do with the failures. My lab...

After an extremely quick crask course on torsional fatigue failures, it is aparent that I have my work cut out for me. It has been many many years since I have had to dust off the types of calculations that I have seen used to shed useful light on the sources of fatigue failures. My initial (and...

CARBURIZE- Here are some side views. http://flypicture.com/bin/?id=rt31ka/c http://flypicture.com/bin/?id=rt31ka/f http://flypicture.com/bin/?id=rt31ka/e http://flypicture.com/bin/?id=rt31ka/R

I have uploaded some pictures. I hope that they can shed some light on the subject. The fractured area is only about 1/4" dia. The files are located at: http://flypicture.com/bin/?id=rtr8kKzf http://flypicture.com/bin/?id=rtr8kK3b http://flypicture.com/bin/?id=rtr8kK3d...

A couple of years ago I worked on a design of a small (approx .5" dia) splined shaft that had a reduced diameter section that was intended to shear in the event that the driven load increased to some unacceptable level. Through some calculation and some experimentation, I arrived on the correct...

A couple of years ago I worked on a design of a small (approx .5" dia) splined shaft that had a reduced diameter section that was intended to shear in the event that the driven load increased to some unacceptable level. Through some calculation and some experimentation, I arrived on the correct...

I have lab testing data that shows that an evaporator is doing 11900 BTUH of latent cooling. How do I convert that value into an amount of water produced by the coil. I need to size a drain for the evaporator assembly. Thanks!

I am working for a company that is using CYCO Automanager WorkFlow 6.0. They have been happy with it but the problem is that we are looking to upgrade to AutoCad 2004 which is not supported by WorkFlow. CYCO recommends upgrading to AutoManager Meridian, but I was previously at a company that...

Dallas, TX

Does anyone know of a consulting firm that specializes in splines and drivelines incorporating splines? I have designed an air conditioning system that is driven by an accessory drive pad on an aircraft engine. All of the components have been built and assembled but when I connect everything to...

Desertfox, Well, here are the results. I had calculated that if I wanted the shaft to fracture at 400 in-lb of torque, the shear section of the shaft would have to be .290" in diameter. I tested 4 sample pieces and the actual diameter is closer to .260" dia. I was very happy with...

Desertfox, Yes, I did use that formula. I am interested to see how close the results are to theory as well. I will be sure to let you know how things turn out. Rufus2k

If the refrigerant in the condenser is not cooled suficiently, this will lead to higher pressures in the system and an increase in the horse power required from the engine to continue to operate the A/C. The cooling comes from the air moving over the condenser coils. The majority of the cooling...

Wow!, all this activity after such a long time. Thank you all for your input. Let me give you an update on this project since I am almost ready to begin testing on the first batch of sample pieces. I had hoped to incorporate some sort of commercial product to protect the engine driving this...

NickB, Thanks, that is what I thought. And no, the spline details are called out in a different section of the spec.

I am designing a splined shaft that will be driven by an accessory drive pad on an aircraft engine. The drive pad has a 12 tooth internal spline (SAE AS 972B). According to that SAE spec, the driven shaft should have an O.D. of 18.49-18.54 mm. I am having a hard time finding a readily available...

DESERTFOX, Thanks for the great info. I really think that this is the direction that I am going to have to take. It turns out that we have built systems in the past that employed this design but we never did the development in house. One question though, in your formula, is "R" the...