Demonstrating science for the McPherson 5th graders.

Flight #37 - 2019c

The third flight of the year will be a secondary payload to a WSU/Newton Middle School launch.  The middle school class will be involved in the chase and recovery, and one of their objectives will be to plan out the flight path with the objective of being in position to see the flight string land.  











Flight Parameters


Launch Date/Time

Monday May 13th at 11:30am (16:30Z).  

Alternative Date n/a  
Launch Site Chisholm Middle School in Newton, KS (38.04N, -97.33W)  

Capsule 1 (Track)


Tracker: ptFlex with DRA818V 700mW transmitter signing W0ZC-11.

Sensor: Spectroscopy sensors AS7265x.

Beaconing: Time-based delay

  • 15 second delays below 7,000m
  • 45 second delays above 25,000m
  • Path is disabled above 2,000m MSL.

Camera:  Dash-cam looking horizontal. Canon A570IS camera running CHDK and dash-cam camera pointed up.


Capsule 2 (Track)

(WARC-Club Designed)


Tracker: ArduinoTrack with RadioMetrix 300mW transmitter signing W0SOE-11.

Beaconing: Altitude-based delay

  • 30 second delays below 5,000m
  • 45 second delays above 25,000m
  • Otherwise 60 second delays.
  • Path is disabled above 1,457m MSL.

Repeater: Raspberry Pi Fusion repeater 445.400-. 
(Note the unusual offset frequency - Preprogram your Fusion radios for 440.400Tx/445.400Rx)

Capsule 3 (Track)

(WSU-Student Designed)


Tracker: Habduino, built by Dillon from Wichita State University.  The transmitter is signing KE0TGR-11.

Beaconing: Time-based delay

  • 40 seconds during entire flight
Capsule 4

Experimental payload from Chisholm Middle School.

Recovery / Misc
Parachute and misc rigging.  
Total Flight Weight Total neck weight on the balloon. 4.19kg
Balloon / Gas

1200g Kaymont

Estimated Burst Altitude 28,445m MSL (93,320')  
Estimated Ascent Rate 5.5 m/s (1080'/min)  
Estimated Descent Rate 6.0 m/s (1200'/min)  
Chase Frequencies 446.100MHz  
NOTAM Filed    




Flight Results


Launch Date/Time Monday May 13th at 12:04pm (17:04Z).  
Launch Site Chisholm Middle School in Newton, KS (38.04N, -97.33W)
Burst Altitude 27,337m MSL (89,690')
Average Ascent Rate 7.46m/s (1,468'/min)
Measured Descent Rate 5.47m/s (1,076'/min) 
Touchdown Site 37.85N -96.885W
Touchdown Time 1:37pm (18:37Z)
Recovery Time 2:30pm (19:30Z)
Distance Traveled 44.7km (27.7mi)
Total Flight Time 1 hour 34 minutes
Downloads Flight Path (KML), Analysis Spreadsheet, Winds Aloft Forecast, W0ZC-11 Log





Photo Highlights






Tracking Predictions

13 May 2019

This morning's forecast calls for a distinct hook back to the northwest just before burst.  This will in effect shorten the flight path, but it has the unwanted potential to draw us into El Dorado Lake.


Flight prediction for May 13th.

12 May 2019

The surface weather still looks very favorable.  Newton is in a flood warning through Monday, so chase crews should be aware.  As of this morning, I'm not seeing any warnings or alerts from the Kansas Department of Wildlife regarding the area around El Dorado Lake.


Flight prediction for May 12th.


11 May 2019

A high pressure area will be pushing the clouds out of the midwest Sunday into Monday.  Expect clear skies, and very calm surface winds.  Biggest factor for recovery will be muddy roads and wet fields.  Plan on brining rubber boots if you have them.


Flight prediction for May 11th.

10 May 2019

Today's prediction extended out east significantly, but same general path.


Flight prediction for May 10th.


9 May 2019

Initial predictions are calling for a short chase, just east and south of the city of Newton.  Surface weather is calling for comfortable temperatures and clear skies, which should make for plenty of opportunity for visual observations.

Flight prediction for May 9th.