Recent content by AWOC

Sorry for not telling you right off the bet about the second part. In the second part of the problem I have to analyze how a smaller surface area heater bar changes Temp vs. time of the soda bottle. Same 100W going into the heater bar with 25% reduction in surface area. This is why I was going...

Sorry I forgot to mention that the heater bar material is pure aluminum. I will definitely assume the constant temp around the bottle. Thanks for tip. Here is where I am stuck now (Heater bar heating air). Doing a lumped capacitance for the convection from the bar to air. The numbers don’t...

Anyone?

Hi all, I have a unique problem that I need some direction on. I have a .5x.5x.75 meter adiabatic chamber. No heat loss from chamber walls to the atmosphere. Inside the chamber there is an electrical flat heater plate .5x.05 meter with constant 100W. A fan blows air over the heater bar at...

I am trying to weld 5mm wide barrel to 1.7mm tube. These are small scale parts that the material choice is not decided by me, but rather the costumer. I have sent these parts out to other laser companies and when the parts come back I have noticed: 1) very smooth almost mirror finish weld...

I am welding a stainless round 304 barrel to a hastelloy round tube using a rotary fixture.

Hello. I am am trying to find out why Hastelloy cracks during laser welding. What techniques are used to lessen the cracks etc. The main focus is to learn as much as I can about laser welding this material and what laser setting to start with . A simple google search has gotten me no where and...

Yeah sorry guys. I took Fluid Dynamics last semester and very aware of Bernoulli's Law, but I got confused because if you think of it as an airplane wing where the faster moving air is underneath and the slower up top it would create lift. I forgot that flow goes towards the lower pressure, but...

How's making the bottom of your car smoother going to create down force, and increase drag?? I still don't understand how a few light sheets of plastic are going to me the car heavier. If anything it will create lift and less drag! Formula cars are not a good example because they way they...

The problem with cars today is aerodynamics. Yes they are way better than they used to be be not nearly enough where they need to be. One area is the under neath of cars today. Unless you are riding 1/2" off the ground the drag created by the undercarriage of your car is a huge problem. The...

You should try to find someone that paint ball's. Paintball air tanks can be pressurized to 4500 psi safely and hold easily 70cu. Take two of these puppies and hook up a cheap home depot regulator and you have enough air to power a pneumatic tool like a sander or grinder. You could even use the...

try New England Small Tube at NEsmallTube.com, all they deal with is any small stainless steel fabrication you can think of. No need to go to Turkey! I like these guys if NEsmalltube doesn't have anything in stock...

Have you guys ever thought of using old diesel engine parts. Their mechanical injector timing methods could be helpful