Borgelt Dynamis variometer

Well we finally got all the algorithms right and the plus and minus signs in the right places. It took a lot longer than we thought until we made a testing breakthrough. One day the story will get told.

Our beta testers report they are very happy and could not fault it.
Search Youtube for Borgelt Instruments for the 20 minute video of Dynamis performing in a Quintus alongside an LX 9000 and vario.

Pilot flew 700km that day. Fast, smooth response and no sensitivity to horizontal gusts or the "g" effects of the mounting of the TE probe vs the variometer. That is, the Dynamis variometer only shows the changes to the vertical air motion.

The horizontal guts effect is proportional to the SQUARE of the TAS and this has become a huge problem with modern, high wing loading gliders cruising at speeds of 100 to 110 knots IAS at altitude where the TAS can be over 140 knots. Very small horizontal gradients in the air cause large signals on Total Energy variometers
(a one knot per 50 meters gradient will cause a 5 knot signal at 100 KTAS and 10 knots at 140 KTAS).

The LX vario was set to 1.5 seconds (fast) time constant. Note there is nothing "wrong" with the LX vario it is just subject to all the known limitations of ALL previous Total Energy variometers.

Any questions, please use the email address on the Borgelt Instruments website, NOT the gmail one as it NEVER gets checked.

Please do not expect to get a description of how it works, just note from the video that it does. It has been a long project dating back to before Borgelt Instruments was formed in 1978.

After many ideas, blind alleys, false starts and miss steps, most of which did not survive initial analysis, although some made it to flight test, serious development of the final instrument was started in early 2013 after confirmation of sensor performance and has just been completed.

We anticipate a couple more interesting display developments as we now have complete 3D knowledge of air motion, vertical as well as vector wind (speed and direction.

I'll try to put together a second video in the next few days from the last half of the 1.5 hours of video we got on 9th February 2019. This was my first video editing effort.

Mike Borgelt