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Borgelt Dynamis variometer



 
 
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  #41  
Old October 11th 20, 03:51 PM posted to rec.aviation.soaring
Martin Gregorie[_6_]
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Posts: 699
Default 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  
Old October 11th 20, 04:34 PM posted to rec.aviation.soaring
[email protected]
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Posts: 281
Default 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  
Old October 15th 20, 03:14 AM posted to rec.aviation.soaring
mart mart is offline
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Posts: 23
Default 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  
Old October 15th 20, 11:58 PM posted to rec.aviation.soaring
Andrzej Kobus
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Posts: 585
Default 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  
Old October 16th 20, 12:10 AM posted to rec.aviation.soaring
Brad Alston[_2_]
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Default 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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