gale 0 #1 May 14, 2003 I know we've been seeing a lot of Cypres chatter lately, but I've got one more.... I'm leaving my airport to jump in at another one. The ride will take less then 2 hours. (Estimates vary) Departing airport is quite close to sea level and the airport I'm jumping into is at 1133 MSL. Can I use my Cypres? Sorry, if this is a dumb question but I can't really find this exact senario in the manual. One of the skydivers I talked to said I couldn't and I just wanted to see if anyone knew for sure. GaleI'm drowning...so come inside Welcome to my...dirty mind Quote Share this post Link to post Share on other sites
ThighMan 5 #2 May 14, 2003 You can use the Cypres, just turn it off (same series of pushes with the red light) and then turn it back on. It recals to the area you are at. I must admit, I am not a expert, nor a rigger but if it is reset, it would be just like if you had only jumped at the one spot... Makes sense?.... Any other opinions?Airborne Blue Skies, No Wind Feet and Knees Together Quote Share this post Link to post Share on other sites
diverdriver 5 #3 May 14, 2003 QuoteYou can use the Cypres, just turn it off (same series of pushes with the red light) and then turn it back on. It recals to the area you are at. I must admit, I am not a expert, nor a rigger but if it is reset, it would be just like if you had only jumped at the one spot... Makes sense?.... Any other opinions? What she is asking is if she can take off with Cypres on and jump into another airport that is higher in elevation than departure point. The answer is yes, you can use it but it will do you no good. The Cypres would fire below ground level at your jump point. What you need to do is use the altitude adjustment feature of the Cypres and change the fire altitude up. If you are unsure of how to do it get your rigger to help you.Chris Schindler www.diverdriver.com ATP/D-19012 FB #4125 Quote Share this post Link to post Share on other sites
bunge 0 #4 May 14, 2003 here is the manual if you lost yours http://www.cypres-usa.com/english_users.pdf explains the method of adjusting for a different landing area than the one zeroed to BUNGE I don't hate them, I just like us better. Quote Share this post Link to post Share on other sites
Cornholio 0 #5 May 14, 2003 Quote What she is asking is if she can take off with Cypres on and jump into another airport that is higher in elevation than departure point. That is true. However, I thought there was another caveat that after 20 minutes at a constant altitude, the cypres will reset to that altitude. That is why if the plane circles for more than 20 minutes, they cyrpi are either reset or the pilot has to make small adjustments to the altitude to fool the cypress into thinking that they're still climbing. Is this true, or another lie someone told me ?? Butthead: Whoa! Burritos for breakfast! Beavis: Yeah! Yeah! Cool! bellyflier on the dz.com hybrid record jump Quote Share this post Link to post Share on other sites
DJL 235 #6 May 14, 2003 Look at the end of page 22. This indicates that the unit does not reset to that altitude by itself and that you must turn it off and on for it to calibrate to a certain altitude."I encourage all awesome dangerous behavior." - Jeffro Fincher Quote Share this post Link to post Share on other sites
gale 0 #7 May 14, 2003 OK, yes, this is what I was looking for. I know how to adjust for landing altitude, I do that all the time. The question was more about the unit getting confused because of the long plane ride. It sounds like it won't? So just to clarify, I could set my Cypres, get on a plane, fly for 5 hours, and I would still be OK? GaleI'm drowning...so come inside Welcome to my...dirty mind Quote Share this post Link to post Share on other sites
freakydiver 0 #8 May 14, 2003 Technically thats not even a legal jump is it? I thought 25 miles away from the original dropzone was as far as one could legally travel and get out at the top? -- (N.DG) "If all else fails – at least try and look under control." -- Quote Share this post Link to post Share on other sites
gale 0 #9 May 14, 2003 I don't know. I just assumed it was legal.... Let's call it hypothetical then, shall we? GaleI'm drowning...so come inside Welcome to my...dirty mind Quote Share this post Link to post Share on other sites
dragon2 2 #10 May 14, 2003 QuoteTechnically thats not even a legal jump is it? I thought 25 miles away from the original dropzone was as far as one could legally travel and get out at the top? If that is true (?) then just about every jump-in would be illegal, not to mention demo jumps? ciel bleu, Saskia Quote Share this post Link to post Share on other sites
billvon 3,008 #11 May 14, 2003 >If that is true (?) then just about every jump-in would be illegal, not >to mention demo jumps? Yep, as is every jump in which one group comes within 2000 feet of a cloud, or jumps after legal sunset without a light visible for 3 miles. A lot of jumps are technically illegal. Quote Share this post Link to post Share on other sites
d604 0 #12 May 14, 2003 Hi, Nat. I think everyone here as missed the big picture. Modern AADs work on air pressure, when you turn on your Cypres it calculates the air pressure where you are. You can change the activation altitude up and down, to compensate for jumping into a DZ with a different elevation than where you take off, but… This only real works if the landing area is relatively near by. The Cypres AAD calculates the elevation by expect rate of change of air pressure, that’s why it is great if the landing area is near by. Kamloops is not relatively near by, lets say ~250 miles by aircraft (I’m guessing), that’s when meteorological conditions come into play. Your take off location, Sydney, can be experiencing lets say a low pressure system while a high pressure system is over the Kamloops region, the Cypres has no way to know that and any calculations it makes to determine it’s activation altitude (or air pressure) may result in erroneous results. This is just one reason why it’s a bad idea to use a Cypres in this situation. Note the amount of time that you spend is the aircraft does not affect that the meteorological conditions of two locations over a great distance. Now, if you are uncomfortable jumping into Kamloops without an AAD that’s cool, but you might be made to jump into home as the plane doesn’t like to land, but carry on back to it’s home. Sean Coach, Instructor, Rigger, BSC Geography Quote Share this post Link to post Share on other sites
gale 0 #13 May 14, 2003 Hi Se, (<- Note the shortening) Thanks for the explanation. It makes sense to me. I'm fine without using one, I really just wanted someone to clear up the facts of the matter for me. Gale (yes, I have a real name, but it's not Nat!)I'm drowning...so come inside Welcome to my...dirty mind Quote Share this post Link to post Share on other sites
b1jercat 0 #14 May 16, 2003 Another twist, I think I read some where that once you take off you should never go below take off elevation, but I can't remember the reason any help out there. blue skies jerry Quote Share this post Link to post Share on other sites
