EOSS-267 Fun Flight

EOSS-sponsored flight to qualify new flight hardware for upcoming flights this year. One 1200g balloon.

A new payload and a new wireless release mechanism will be flown to qualify the pair for service later this year.  The wireless release will be commanded to open during flight, but is tethered to prevent the actual release of the balloon.  The KC7KCK GoPro will be mounted near the release to capture the operation of the release.  KC0D-11 will be flown to requalify the payload after a failure on the last flight due to a broken antenna connector.

 An attempt will be made to specify a target landing location of the flight string, then release the balloon at the right time to achieve this goal.  This could be useful to help avoid landing in undesirable locations such as a lake.

prediction at www.eoss.org/predict 

Flight Coordinator: 
Event Date: 
Saturday, February 24, 2018 (All day)
Alt Launch Date: 
Sunday, February 25, 2018
Launch Site: 


Updated Payload Plan (Rev B).

Multiple predictions on the prediction page (see flights 367, 467 ... 867) for different ascent rates and burst altitudes.

A 1200g balloon carrying EOSS beacons for qualification.

Balloon Type: 
Kaymont 1500g latex
9 foot Rocketman
Tracking Beacons
147.555 MHzKCØD-15APRS/DF/Wireless ReleaseSecondary Beacon
144.340 MHzAEØSS-12APRS/DigiPrimary Beacon, Timeslotted :00 & :30
145.090 MHzKCØD-1APRS/DF/Wireless Releasefor qualification with tethered release
145.750 MHzKCØD-11APRS/DF/Releasefor qualification without release
Rt. 71 & 14 (West) X 70 Y 30

Preflight Net:

  • 449.225 MHz RMHAM Repeater (141.3 Hz Tone) 8 pm MDT preceding night
  • 146.940 MHz (103.5 HZ Tone) RMRL Repeater if the RMHAM machine is down
  • 146.640 MHz (100 Hz Tone) DRL will serve as a backup frequency

Recovery Operations:

  • 449.450 MHz RMRL (103.5 Hz Tone)
  • 448.225 MHz (141.3 Hz Tone) Testing… PL verified 7/2/14
  • 446.100 MHz Field Simplex
  • 146.550 MHz Backup field simplex

Launch Site Simplex: 446.050 MHz

HF - Possible ops: 7.235 LSB

TR Breakfast: 
Wednesday: Looks like the tracking breakfast will be at Country Kitchen, Sterling (Ramada Inn) on east side of I-76. Time TBD
Tactical Calls: 
TacticalCall SignNameNotes
AlphaWAØGEH, KCØDMarty, MarkTracking Coordinators, Downrange
BravoKE7KCKTomTracker, Launch to Recovery Site
CharlieKCØRPS, WØNFWJim. GeorgeTrackers, Launch to Recovery Site
DeltaKØSCCStephenTracker, Launch to Recovery Site
EchoKBØUBZBenTracker, Downrange
FoxtrotN6BAJeffTracker, Downrange
GolfNØNDMLarryTracker, Launch to Recovery Site
HotelKEØORBJoh, NancyTracker, Downrange
IndiaW9CNMikeTracker, Sunday Only
JulietKØLOBJim, JanaeTracker, Downrange