Recent content by DonLeffingwellPE

Is there a command in Autocad that lets you measure the "true" length of a spline curve? Don Leffingwell dleffingwell@snet.net

Here is a URL for this site with more information. http://www.eng-tips.com/faqs.cfm?spid=731&sfid=3&CFID=16647063&CFTOKEN=71076716 Good Luck Don Leffingwell

I would suggest you look at the FAQ at the top of this forum in particular. Don Leffingwell

Thank you to all who responded. We did get a licensed electrician to look at the panel. The problem was a corroded main breaker, which of course we couldn't see without taking the panel apart. Don

Thank you to all who responded. We did get a licensed electrician to look at the panel. The problem was a corroded main breaker, which of course we couldn't see without taking the panel apart. Don

I was at my brother-in-laws for dinner Sunday night and he told me of a problem he had been having with his lights. He said they keep flickering, sometimes fast, sometimes slow. It doesn't happen all the time, and it seems to be random. And it only happens in part of the house. While I was...

I was at my brother-in-laws for dinner Sunday night and he told me of a problem he had been having with his lights. He said they keep flickering, sometimes fast, sometimes slow. It doesn't happen all the time, and it seems to be random. And it only happens in part of the house. While I was...

Thanks Reddog. I have purchased the NFPA 79 Electrical Standard for Industrial Machinery based on posting this same question in the electrical controls forum and the response I got there. Thanks anyway. Don

Below is the Lincoln Electric Site. I would also recommend this book. Don Leffingwell dlefffingwell@snet.net http://navigation.helper.realnames.com/framer/1/0/default.asp?realname=Lincoln+Electric+Company&url=http%3A%2F%2Fwww%2Elincolnelectric%2Ecom&frameid=1&providerid=0&uid=30021287

The above posters are exactly right. However, if you know the fluid involved, and the geometry, there are some published charts for ranges of heat transfer coefficients. Some books that have these charts: Mark's Handbook, Handbook of Heat Transfer, etc. These type of charts are useful for...

I'm sure you can find the answer at the site below, if not at this particular URL. Don Leffingwell dleffingwell@snet.net http://www.asme.org/bboard/main-frame.tcl?topic=Pressure%20Vessel%20and%20Piping

I don't know about the ultra sound but you can use an infrared temperature sensor to measure the temperature up stream and downstream of the trap. If the temperature is the same, the trap needs repair or replacing. Don Leffingwell PE

Thank you Steve. I will contact these people after the Holidays. This project most likely has been dropped. I have read about the wood flour and polymer twin screw extrusion technique at the Forest Products Lab site back in April. I sent them a letter and didn't receive a response. I am still...

Look at the FAQ under Mechanical Engineer's. On source of possible references is consulatants you may have worked with. Don Leffingwell PE

I would take a length of tubing long enough to make the part, start bending at one end, and then finish by cutting off the excess at the other end. Tehn I would measure what I cut off. Since I know what I started with, I would have an exact answer. Otherwise: S = r*theta s = Arc Length r = bend...