Flight #15 - 2005c

This is our second high altitude attempt with a small payload.

Flight Parameters
Launch Date/Time Saturday, 1 October at 7:30am
Alternative Date Sunday, 2 October at 7:30am
Launch Site Wells Aircraft at the Hutchinson Airport (38° 03.8',  97° 51.9'W) in Hutchinson, KS
Primary Transmitter / Antenna PocketTracker running APRS (W0WR-11) on 144.39MHz / Horizontally polarized dipole
Backup Transmitter / Antenna PocketTracker running APRS (AJ0NR-11) on 144.34MHz / Horizontally polarized dipole
Balloon / Gas Kaymont 1500gram / 110 cu feet of Helium
Estimated Burst Altitude 120,000' MSL
Estimated Ascent Rate 800' per minute
Estimated Descent Rate Approx. 1000' per minute at touchdown
Capsule(s) weight 1lbs 10oz including parachute, rigging, batteries, etc...
Chase Frequencies 446.52MHz
Balloon Finder Telemetry Mode N/a

Flight Predictions

Flight Predictions
Date Created (Central Time) Dist From Launch Bearing From Launch Relative Position Max Speed Map Winds
26 Sep 8:30pm 47mi 19° (N-NE) 2mi N. of Assaria 49mph Map Winds
28 Sep 12:00pm 62mi 7° (N) 5mi NW of Salina 53mph Map Winds
29 Sep 11:45am 47mi 7° (N) 4mi E-SE of Brookville 41mph Map Winds

Flight Results

111,083 feet MSL put us in the record books, but no where close to our goal.  Two major factors contributed to this: First we swapped out one of the PocketTrackers with our standard controller board/HT. The second and related fact was that we slightly overfilled the balloon because of the extra couple of ounces.

Flight Statistics
Launch Date/Time Saturday, 1 October 2005 at 8:48am.
Launch Site Wells Aircraft at the Hutchinson Airport (38° 03.8',  97° 51.9'W) in Hutchinson, KS
Burst Altitude About 111,083' (33,858m) MSL
Average Ascent Rate 966 feet per minute (4.91m/s)
Measured Descent Rate 1488 feet per minute (7.56m/s)
Touchdown Site 3 miles southwest of Lindsborg, KS (38° 32.1524'N, 97° 43.6066'W)
Touchdown Time Saturday, 1 October 2005 at 11:07am
Recovery Time Saturday, 1 October 2005 at 12:15pm
Distance Traveled 34 miles (54km) as the crow flies
Total Flight Time 2 hours 19 minutes
Downloads Lat/Lon File, Log File, Flight Analysis

2005c-overview

2005c-landing

Lessons Learned

  • Having transmitters on separate frequencies is a hassle to trouble shoot during a chase.  On the other hand, it is comforting to have them on different channels in case of a stuck transmitter of excessive traffic.
  • To check inflation, we need to have a loop attached to the neck of the balloon for the water jug to quickly attach to.