 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| HomeDiscussion Groups General ModelsRailroadsRocketsRadio Controlled Air ModelsHelicoptersLand ModelsWater ModelsModelGeeks.com Contact UsLink To UsSearch & Site Map |
Model Forum / General / Rockets / April 2006Apogee Recording Altimeter
I'm interested in buying a new altimeter and noticed thge Apogee unit records for up to 5 minutes. ANyone have used one out there ? Dave Ketchledge > I'm interested in buying a new altimeter and noticed thge Apogee unit > records for up to 5 minutes. ANyone have used one out there ? > > Dave Ketchledge No, but I have used the Alt15K/WD logging altimeter (no deployment)works great. See also http://www.perfectflite.com/ Yes it's the same altimeter BW > I'm interested in buying a new altimeter and noticed thge Apogee unit > records for up to 5 minutes. ANyone have used one out there ? > > Dave Ketchledge Hi Dave, Apogee is just a reseller of the PerfectFlite 15K altimeter. BTW, they work great > I'm interested in buying a new altimeter and noticed thge Apogee unit > records for up to 5 minutes. ANyone have used one out there ? > > Dave Ketchledge Dave, I launched one in my LOC Weasel clone on H73, Saturday ... the altimeter read 3115'. my rocksim says 3135'. I'd say that's close enough! now I have a calibrated rocksim and I am going to for exactly a mile. Is 5345' close enough to a mile? I can tell you how I did it very simply. >> I'm interested in buying a new altimeter and noticed thge Apogee unit >> records for up to 5 minutes. ANyone have used one out there ? [quoted text clipped - 5 lines] > enough! now I have a calibrated rocksim and I am going to for exactly a > mile. > Is 5345' close enough to a mile? I can tell you how I did it very simply. tell us! > > Is 5345' close enough to a mile? I can tell you how I did it very simply. > > tell us! Why?? The best recording altimeters, judging from the data, are from Adept. The data are filtered well enough that one can derive velocity and acceleration from them - also thrust and Cd curves with a little extra work in vertical flights. That's a lot better than the data from other altimeters I've seen. Not actually familiar with the PerfectFlite. Regards -Larry Curcio > I'm interested in buying a new altimeter and noticed thge Apogee unit > records for up to 5 minutes. ANyone have used one out there ? > > Dave Ketchledge > The best recording altimeters, judging from the data, are from > Adept. The data are filtered well enough that one can derive > velocity and acceleration from them - also thrust and Cd > curves with a little extra work in vertical flights. That's a lot > better than the data from other altimeters I've seen. Not > actually familiar with the PerfectFlite. if you really want velocity, accelleration, jerk, buy an altimeter with an accellerometer. my PerfectFlites work great but they are barometric only. >> The best recording altimeters, judging from the data, are from >> Adept. The data are filtered well enough that one can derive [quoted text clipped - 4 lines] > > if you really want velocity, accelleration, jerk, buy an altimeter with an accellerometer. That was a little uncivil, don't you think? >> if you really want velocity, accelleration, jerk, buy an altimeter with an accellerometer. > > That was a little uncivil, don't you think? http://en.wikipedia.org/wiki/Jerk  SignatureSteve Humphrey (replace "spambait" with "merlinus" to respond directly to me) > >> if you really want velocity, accelleration, jerk, buy an altimeter with an accellerometer. > > [quoted text clipped - 5 lines] > Steve Humphrey > (replace "spambait" with "merlinus" to respond directly to me) I think someone owes me a new keyboard. You learn something new everyday. -Aaron > > >> if you really want velocity, accelleration, jerk, buy an altimeter with an accellerometer. > > > [quoted text clipped - 11 lines] > > -Aaron 'twas well done, indeed. Bravo! SignatureTweak >>>The best recording altimeters, judging from the data, are from >>>Adept. The data are filtered well enough that one can derive [quoted text clipped - 6 lines] > > That was a little uncivil, don't you think? oh my goodness!!! I sure didn't mean it like that! I was not being uncivil, the wikipedia entry for jerk is what I meant - 2nd derivative of velocity. it made sense when I typed it late at night. very sorry nad I hope everyone gets a laugh out of this. > very sorry nad I hope everyone gets a laugh out of this. Who's a 'nad' ??? ;-) RDH8 >> very sorry nad I hope everyone gets a laugh out of this. > > Who's a 'nad' ??? > ;-) Yeah, first he calls someone a jerk, now this! Who does he think he is? ;-) I assume, by Jerk, you mean the third derivative of altitude :-) Adept altimeter data are good enough to be double differentiated by Savitsky-Golay filters to give acceleration curves. They have the opposite problem that accelerometers have. They measure only in the vertical dimension To the extent that the trajectory is vertical, the acceleration is righteous. Had thought I'd made a breakthrough with this double differentiation, but evidently the Adept software does it too. BTW, I have traditionally been so far in the accelerometer camp that, as far as I know, Tommy dislikes me. We have no connection whatever. -Larry (Deriving the jerk could be stretching it) C. > > The best recording altimeters, judging from the data, are from > > Adept. The data are filtered well enough that one can derive [quoted text clipped - 7 lines] > > my PerfectFlites work great but they are barometric only. |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.