Karan
If the all the basic six flight instruments fail (glass cockpit), what will be the backup for it. I have some trouble finding info about that backup system. I don't even know if it's mandatory. I need lots of info about it. Help!
Answer
If you're dealing with electronic flight displays ("glass cockpits"), there has to be a backup. Even small general aviation airplanes have to have a backup. You need a backup for attitude, airspeed and altitude. In cheaper or older planes, that backup was usually the traditional "steam" gauges. Look for pictures of the cockpit of a Cirrus SR-22 for an example. In more advanced planes, it could be a completely secondary flight display with an independent AHRS and Air Data computer. It could also be something that is sort of a mini flight display that shows everything you need. These are sometimes called an "ISIS". It looks like a mini primary flight display and it is a self contained instrument that contains an AHRS and air data computer. You find these in modern jets. I'd bet that any modern boeing or airbus plane has them.
Note that in the airline world, you need 3 sources of attitude information. That's why airliners will not only have redundant primary flight displays, but also a third attitude source.
If want something official from the FAA to read about this topic, take a look at FAA Advisory Circular 23-1311. Look in chapter 8, Flight Displays. That describes it all for the general aviation world. That's an advisory circular that was written to provide avionics manufacturers a way to adhere to a somewhat vague regulatory requirement, FAR 23.1311. There is a similar document and regulatory requirement for the airline world but I don't know it offhand (maybe 25.1311).
If you're dealing with electronic flight displays ("glass cockpits"), there has to be a backup. Even small general aviation airplanes have to have a backup. You need a backup for attitude, airspeed and altitude. In cheaper or older planes, that backup was usually the traditional "steam" gauges. Look for pictures of the cockpit of a Cirrus SR-22 for an example. In more advanced planes, it could be a completely secondary flight display with an independent AHRS and Air Data computer. It could also be something that is sort of a mini flight display that shows everything you need. These are sometimes called an "ISIS". It looks like a mini primary flight display and it is a self contained instrument that contains an AHRS and air data computer. You find these in modern jets. I'd bet that any modern boeing or airbus plane has them.
Note that in the airline world, you need 3 sources of attitude information. That's why airliners will not only have redundant primary flight displays, but also a third attitude source.
If want something official from the FAA to read about this topic, take a look at FAA Advisory Circular 23-1311. Look in chapter 8, Flight Displays. That describes it all for the general aviation world. That's an advisory circular that was written to provide avionics manufacturers a way to adhere to a somewhat vague regulatory requirement, FAR 23.1311. There is a similar document and regulatory requirement for the airline world but I don't know it offhand (maybe 25.1311).
Any suggestions for sealing acrylic paint on glass?
dancing_in
I am making little votive holders for my boyfriend and a few mutal friends that have their fraternity letters on the, Im using acrylic paint on glass. Any suggestions on tip on how to seal the acrylic paint from chipping off the glass or to keep it from coming off when its being washed. The votive holders can double over as a shot glass. Thanks in advance.
Answer
Fraternity boys and painted glass? I can almost guarantee you those paintings won't last!! LOL What about vinyl stickers? http://www.woodlandmanufacturing.com/greek-letters-vinyl.html
I'm not sure how well they'd do for votives though.
Have you thought about using etching cream? It will permanently etch your glasses and you can find what you need in any craft store, probably near the paint aisle.
Here's How:http://www.ehow.com/how_8589_etch-glass.html
You can buy a stencil, or use a computer font to make your own on stenciling plastic (also at the craft store)
http://www.woodlandmanufacturing.com/greek-letters-stencils.html
If you're really set on painting, this site has a TON of great info. http://www.plaidonline.com/GlassPainting.asp
Fraternity boys and painted glass? I can almost guarantee you those paintings won't last!! LOL What about vinyl stickers? http://www.woodlandmanufacturing.com/greek-letters-vinyl.html
I'm not sure how well they'd do for votives though.
Have you thought about using etching cream? It will permanently etch your glasses and you can find what you need in any craft store, probably near the paint aisle.
Here's How:http://www.ehow.com/how_8589_etch-glass.html
You can buy a stencil, or use a computer font to make your own on stenciling plastic (also at the craft store)
http://www.woodlandmanufacturing.com/greek-letters-stencils.html
If you're really set on painting, this site has a TON of great info. http://www.plaidonline.com/GlassPainting.asp
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