Recent content by tasp77

Thanks for your help though, interesting considering what I have been through today.

will try to post pic

I left 'tunnel' off the OP because I didn't want to be confusing. The Yancey nailed the bridge portion in any event, not the tunnel portion(s). Knocked out quite a chunk. Can we post pics here somehow? In any event, in regards to any bridge with a pier knocked out by any ship, how do they...

I recall several years ago a ship damaged the Chesapeake Bay Bridge by plowing through it and taking out several sections. I have always wondered how they fixed the piling that supports the structure. Since both ends of the damaged portion of the bridge remained, the pilings in the damaged...

A related item; I formerly tested hydraulic valves many years ago, and using a pump to force oil through a spring loaded poppet will produce a pressure drop, and the oil passing through it will warm up. As I recall, it was roughly 10 degrees F per 1000 psi. Sticking my finger in the discharge...

I would think any of the caps could fail, so wouldn't the MTBF decrease? If there were a million caps, you'd have a million more ways it could fail, after all. I would ask, however, are the caps in series? Perhaps you want to achieve a certain capacitance value otherwise unavailable...

Also see it what you are feeling is a cessation of the reaction forces, and the nozzle is neither drawn down or pushing away from the bucket bottom, or an actual pull towards the bottom of the bucket. What I'm suggesting is, you might not be feeling suction, just a neutralization of the...

I don't recall any mention of the supernova(s) contributing to the solar system, but didn't Scientific American (or was it Sky & Tel?) have an article holding out hope other stars birthed in the same area as our system might be identified someday? As for the multiple supernovas, I would be...

You might also note that you cannot (easily) press the nozzle tight enough against the bottom of the bucket to stop the flow.

I recall a similar problem posed many years ago (late 70s) that was quite similar except for scale. The pressure was 14.7PSI, and the diameter of the cylinder was a kilometer as I recall. (yeah, it was in regards to a Gerard O'Neill space habitat).IIRC, the thickness turned out to be around a...

They might want to avoid all the Lagrangian spots in the Pluto system too. Don't think a ring system around Pluto would be much of a possibility, I suspect the height of the atmosphere (despite it's low density) would exceed the Roche limit for rings, and any atmosphere at all over the age of...

Hope I remember this correctly, Asimov calculated in one of his excellent science essays around a pound (love those English measures) of electrons somehow removed from Earth and added to the sun would drastically alter the Earth's orbit from around it. I think as alluded to earlier in the...

Is he asking about 'holes' in a semiconductor? I'm not really fathoming the question . . .

Your right about the train being old, it was manufactured during the Eisenhower administration. The system badly needs adjustment too, a couple of wheels lock up and I suspect several others don't have much braking force at all. We really don't want to lock up any wheels, putting flat spot...

I sometimes operate a small park train with air brakes. I think for authenticity the designer of the train went with an air system, and also because the (authentic) horn on the train needed compressed air to operate. Additionally, since the train only goes 6 MPH, performance of the braking...