kallend 2,154 #1 February 10, 2003 Heard a rumor today that the new Homeland Security administration is looking at "barometrically operated bomb detonators used for deploying parachutes". Sound like a CYPRES?... The only sure way to survive a canopy collision is not to have one. Quote Share this post Link to post Share on other sites
indyz 1 #2 February 10, 2003 Excuse me while I go invest in companies that make pin-puller AADs. Quote Share this post Link to post Share on other sites
skygod7777 0 #3 February 10, 2003 QuoteHeard a rumor today that the new Homeland Security administration is looking at "barometrically operated bomb detonators used for deploying parachutes". Sound like a CYPRES? it could be a cypres. but it also could be about any aad. later Quote Share this post Link to post Share on other sites
Viking 0 #4 February 10, 2003 "heard a rumor" I swear you must have footprints on the back of your helmet - chicagoskydiver My God has a bigger dick than your god -George Carlin Quote Share this post Link to post Share on other sites
Push 0 #5 February 10, 2003 So it's a bomb detonator now? What's it gonna do, blow air on you? "Get back, I've got a spring loaded pilot chute and I'm not afraid to use it!" -- Toggle Whippin' Yahoo Skydiving is easy. All you have to do is relax while plummetting at 120 mph from 10,000' with nothing but some nylon and webbing to save you. Quote Share this post Link to post Share on other sites
Samurai136 0 #6 February 10, 2003 No it doesn't sound like a cypres. The cypres makes conclusions about speed based on the rate of change in air-pressure as well as altitude. The cypres doesn't activate unless both Speed and Altitude conditions are met. Since the cabin pressure is maintained at a constant 5000' agl on commercial flights neither condition for activation is achieved. It sounds like a new urban myth generated by security people who don't know their ass from a hole in the wall. Where did you hear this story, anyway? Ken"Buttons aren't toys." - Trillian Ken Quote Share this post Link to post Share on other sites
nacmacfeegle 0 #7 February 10, 2003 A modified Dytter would do the same job.....all you need is a pressure switch, which is essentially at the heart of these things. Pressure switches should be banned as well? It was a home made "barometric detonator" that brought down the PanAm747 over Lockerbie.-------------------- He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me. Thomas Jefferson Quote Share this post Link to post Share on other sites
JJohnson 0 #8 February 10, 2003 BWAHAHAHAHA. ROFLMAO!!JJ "Call me Darth Balls" Quote Share this post Link to post Share on other sites
goose491 0 #9 February 10, 2003 The claim sounds false to me as well. Cabin pressure being constant, the cypress would have no indication of altitude changes. Even if I wanted to make a bomb that I would attach to the outside of an airplane, a CYPRESS would likely not work as a detonator because a plane does not reach descent rates of 78mph unless it is 'falling'. Taking apart an audible to set and use its switch is more like it. A dytter will work at a preset altitude independant of airspeed. My Karma ran over my Dogma!!! Quote Share this post Link to post Share on other sites
Craig 0 #10 February 10, 2003 QuoteThe claim sounds false to me as well. Cabin pressure being constant, the cypress would have no indication of altitude changes. The cabin altitude can be anywhere from ground level at the gate, to about 7,000 feet during flight. Quote Share this post Link to post Share on other sites
Push 0 #11 February 10, 2003 Well, the folks in HS don't really know how the CYPRES works. I see how they could think that some parts could be used as a detonator, since they don't actually know anything about it. I also hope that once they do proceed to the clue dispenser they will come to the same conclusions as we did. -- Toggle Whippin' Yahoo Skydiving is easy. All you have to do is relax while plummetting at 120 mph from 10,000' with nothing but some nylon and webbing to save you. Quote Share this post Link to post Share on other sites
steve1 5 #12 February 10, 2003 QuoteQuoteThe claim sounds false to me as well. Cabin pressure being constant, the cypress would have no indication of altitude changes. I wonder though if a bomb is placed in the cargo hold. It probably wouldn't have oxygen pumped into that area, as would the cabin area. Actually an altitude sensing bomb is fairly easy to make. I won't go into any more detail than this because the internet isn't a good place to discuss bomb building, but it's very similiar to a time bomb with a clock. Steve1 Quote Share this post Link to post Share on other sites billvon 3,120 #13 February 10, 2003 >I wonder though if a bomb is placed in the cargo hold. It probably >wouldn't have oxygen pumped into that area, as would the cabin area. Neither area has oxygen pumped into it, just extra air (from a compressor stage on an engine.) The cargo hold is pressurized as well for structural integrity. If a plane does lose pressure in its hold suddenly, the cabin floor can collapse from the pressure against it - almost 1000 pounds per square foot if the pressure loss happens at altitude. Some planes now have blowout panels in the floor so they go before the cabin floor does. Quote Share this post Link to post Share on other sites steve1 5 #14 February 10, 2003 Neither area has oxygen pumped into it, just extra air (from a compressor stage on an engine.) The cargo hold is pressurized as well for structural integrity. If a plane does lose pressure in its hold suddenly, the cabin floor can collapse from the pressure against it - almost 1000 pounds per square foot if the pressure loss happens at altitude. Some planes now have blowout panels in the floor so they go before the cabin floor does. That makes sense. I've seen baggage loaded into another compartment, and assumed it wasn't pressurized. Steve1 Quote Share this post Link to post Share on other sites
billvon 3,120 #13 February 10, 2003 >I wonder though if a bomb is placed in the cargo hold. It probably >wouldn't have oxygen pumped into that area, as would the cabin area. Neither area has oxygen pumped into it, just extra air (from a compressor stage on an engine.) The cargo hold is pressurized as well for structural integrity. If a plane does lose pressure in its hold suddenly, the cabin floor can collapse from the pressure against it - almost 1000 pounds per square foot if the pressure loss happens at altitude. Some planes now have blowout panels in the floor so they go before the cabin floor does. Quote Share this post Link to post Share on other sites
steve1 5 #14 February 10, 2003 Neither area has oxygen pumped into it, just extra air (from a compressor stage on an engine.) The cargo hold is pressurized as well for structural integrity. If a plane does lose pressure in its hold suddenly, the cabin floor can collapse from the pressure against it - almost 1000 pounds per square foot if the pressure loss happens at altitude. Some planes now have blowout panels in the floor so they go before the cabin floor does. That makes sense. I've seen baggage loaded into another compartment, and assumed it wasn't pressurized. Steve1 Quote Share this post Link to post Share on other sites
