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#41
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Borgelt Dynamis variometer
On Sun, 11 Oct 2020 07:29:10 -0700, stu857xx wrote:
This things is still an interesting puzzle. No manuals or prices on the web site yet. If TE = mgh + 1/2mv**2, perhaps one could measure v and/or h with a really good GPS instead of plumbing? (That might measure things with respect to the ground instead of airmass, but given that's where the next waypoint is, I'm still unconvinced that that is bad.) That's been done. The ALOFT project, which developed a thermal-aware autopilot for a 5m span carbon RC glider airframe measured air mass movement using an onboard GPS well enough to locate and center thermals. They claimed the signal was less noisy then the output from an onboard vario. That project was completed in 2007 and got its developer a PHD in aero- engineering. Details (the thesis, a related paper or two as well as the story of it taking part in an RC XC competition in California) are available on the Internet, though you may need to use the Wayback Machine archive to find all of them. -- Martin | martin at Gregorie | gregorie dot org |
#42
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Borgelt Dynamis variometer
That's been done. The ALOFT project, Thanks, here's the report link https://apps.dtic.mil/sti/pdfs/ADA614555.pdf |
#43
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Borgelt Dynamis variometer
I know the quintus pilot quite well and he is very happy with the vario and obviously still flying with it. So happy that his wife, who flies a 31 , now also has one.
The installation involves 2 rather large ( about 100mm) professional GPS antennas in the glider. One in the cockpit and the other one on top of the fuselage halfway near the tail. You barely notice it. They work on the normal GPS signals from the US , Galileo and the other ones if available, like car navigation only a lot more accurate and for vertical speed. Mike has made an amazing innovation for gliding. |
#44
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Borgelt Dynamis variometer
On Wednesday, October 14, 2020 at 10:15:03 PM UTC-4, mart wrote:
I know the quintus pilot quite well and he is very happy with the vario and obviously still flying with it. So happy that his wife, who flies a 31 , now also has one. The installation involves 2 rather large ( about 100mm) professional GPS antennas in the glider. One in the cockpit and the other one on top of the fuselage halfway near the tail. You barely notice it. They work on the normal GPS signals from the US , Galileo and the other ones if available, like car navigation only a lot more accurate and for vertical speed. Mike has made an amazing innovation for gliding. Kind of strange that so far no one who actually flew with the variometer endorsed it publicly. I would expect an article by now in a major soaring magazine. |
#45
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Borgelt Dynamis variometer
On Thursday, October 15, 2020 at 4:58:11 PM UTC-6, Andrzej Kobus wrote:
Kind of strange that so far no one who actually flew with the variometer endorsed it publicly. I would expect an article by now in a major soaring magazine. Unless those that have it want to keep it as competitive advantage as long as they can! |
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