In a certain document I will never be able to retrieve, I noted theworry of some aviation engineer relating to the growing use of carboninstead of ye olde iron (aluminium etc) in the construction ofairplanes.The "Faraday Cage" effect may not be longer in effect, as carbonconstructions have a real electric resistance, and hence disspatepower in a lightning strike.I have heard of totall loss wind turbine failures due to lightningstrikes in the blades - blade disintegrates - turbine unbalanced -tears itself up.Airbus prides itself on using modern composites - anybody knows howreal lightning strikes are tested / simulated?

I certainly hope they can recover enough pieces to identify _why_ itcrashed. What concerns me is a report that debris was spread over a36 mile diameter area. I haven't heard that repeated, so maybe it wasan error. But, if true, that would suggest an explosion. It is alsonotable that there was no voice transmissions near the time of the"short circuit" data transmission. ...Jim Thompson-- | James E.Thompson, P.E. | mens || Analog Innovations, Inc. | et || Analog/Mixed-Signal ASIC's and Discrete Systems | manus || Phoenix, Arizona 85048 Skype: Contacts Only | || Voice:(480)460-2350 Fax: Available upon request | Brass Rat || E-mail Icon at | 1962 | I love to cook with wine Sometimes I even put it in the food

Airbus crash - carbon? - ElectronDepot

P

Paul Hovnanian P.E. 17 years ago

[snip]

So you've got a case right there where being one step closer to the user gives you more insight into the actual conditions than some regulator had.

Now, I don't know sqat about medical equipment. But I'll assume that the primary concern is that the equipment not create a hazardous condition for the patient (or medical personnel). Blowing up an EKG machine was probably not considered a hazard. But I can think of a few failure modes involving a defib machine, unanicipated conductors attached to the patient, possibly hazardous 'sneak circuits' that could harm the patient or someone leaning on the connected EKG machine. Never mind whether the machine survives.

Paul Hovnanian mailto:Paul@Hovnanian.com ------------------------------------------------------------------ Q: Why do mountain climbers rope themselves together? A: To prevent the sensible ones from going home.

Vote

J

James Arthur 17 years ago

formatting link

Indeed!

Vote

J

James Arthur 17 years ago

formatting link

Plus CO2--is it just me, or is it getting hot in here?

Cheers, James Arthur

Vote

M

Michael A. Terrell 17 years ago

formatting link

I don't really know. I'm heat intolerant, and I prefer brunettes.

You can\'t have a sense of humor, if you have no sense!

Vote

J

Joerg 17 years ago

Yeah, but I was under the assumption that a standard of the 2nd category you mentioned (build per table 401.43 and you can't get sued) would cover things down to that level of detail and prudence. It didn't. No idea if it was input from guys like me that changed it but they sure took their time.

It's patient and medical personnel I was converned about. Plus the fact that some gases in ER environments can turn into combustible mixtures and there you don't want to have anything arc over.

Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.

Vote

K

krw 17 years ago

I would assume that the patient might need the EKG machine after the paddles were applied too.

Vote

J

Joerg 17 years ago

That's why I never understood how on earth EKG units could be sold that aren't defibrillator-proof. If someone is on such a machine there is a reason why he or she is, and this could mean that an unforeseen cardiac event might take place without much advance notice, as they usually tend to do.

Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.

Vote

K

krw 17 years ago

Amazing. I know a couple of people who have had to be de-fibbed during a stress test. I'm sure the EKG machine was rather useful then.

Vote

J

James Arthur 17 years ago

EKG Machine, $3K...

...defibrillator, $5K...

...the moment you discover the defibrillator's running Windows Vista(tm), Embedded Edition?*

[*](screen shot: "Click Start to begin...")

Priceless.

Cheers, James Arthur

Vote

M

Michael A. Terrell 17 years ago

Moronic.

You can\'t have a sense of humor, if you have no sense!

Vote

J

JosephKK 17 years ago

part:

common,=20

50,000-60,000=20

a=20

thunderstorms=20

I=20

thunderstorms=20

has=20

location=20

Good morning, Don. I see your pilot light is lit and seems to be running steadily.

Vote

J

Jim Yanik 17 years ago

James Arthur wrote in news:aJFWl.677$ snipped-for-privacy@nwrddc02.gnilink.net:

gives "blue screen of death" a whole new meaning.....

Jim Yanik jyanik at kua.net

Vote

Airbus crash - carbon?

Join the Discussion

Didn't find your answer?