Differences

This shows you the differences between two versions of the page.

--- projects:jimbob:launch3 [2013/07/30 18:33] – kevwal
+++ projects:jimbob:launch3 [2013/08/07 07:41] (current) – [Predictor] kevwal
@@ Line 15: / Line 15: @@
 Single Energiser Lithium AA or AAA
-AA - 3,000 mah, 15g
+  * AA - 3,000 mah, 15g
-AAA - 1,250 mah, 8g
+  * AAA - 1,250 mah, 8g
 Going to use a single AA for my first flight - the voltage drop from a AAA whilst the GPS is getting a fix is quite high and the boost converter I am using fails to maintain the voltage required to the GPS and it resets after a couple of hours in the freezer.
@@ Line 41: / Line 41: @@
 ===== Weight =====
-ToDo
+Tracker including aerial - 13.8g
+Battery including lead - 16.2
+Insulation ~ 7
+Total = 39g
@@ Line 50: / Line 57: @@
 and modifying the predictor from here: http://ukhas.org.uk/_media/guides:burst3.xls
-with a balloon weight of 37g, a burst diameter of about 0.70m is the best estimate I could make.
+with a balloon weight of 37g, a burst diameter of about 0.70m is the best estimate I could make for a 'if it bursts' flight path with a Descent rate of 5m/s.
-Foil balloon float / bursts seem much less predictable than weather balloons, but I will use the above for an idea of the flight path.
+Based on a 39g payload, to get an ascent rate of 1m/s = 3.5g free lift
+===== Flight Document ====
+Flight Document created http://habitat.habhub.org/genpayload/
+Doc ID: c5c392ef5958c9dce8ffd58920297444
+Document: {"type":"flight","approved":false,"name":"G7PMO Launch 2","start":"2013-08-07T00:00:00+01:00","end":"2013-08-07T23:59:59+01:00","launch":{"time":"2013-08-07T10:00:00+01:00","timezone":"Europe/London","location":{"latitude":52.3,"longitude":-0.7}},"metadata":{"location":"Wellingborough, Northamptonshire, UK","project":"G7PMO","group":"Kevin Walton"},"payloads":["e55cc3ffb42062c70087dae3d9520903"]}
 ==== Launch Announcement ====
-Launching from a site near Market Harborough (Leicestershire)
+Launching Wednesday 7th August around 10am a single tracker foil launch, from a site near Wellingborough (Northants).
-Primary tracker: RFM22B based, $$HABTRK, 434.175Mhz, USB, RTTY, 470Hz Shift, ASCII-7, 50 Baud, Parity none, 1 Stop bit
+Primary tracker: RFM22B based, $$HABTRK, 434.150Mhz (434138400 on my rx), USB, RTTY, 470Hz Shift, ASCII-7, 50 Baud, Parity none, 1 Stop bit
 $$HABTRK, id, time, lat, lon, alt, sats, vinmv, rfm_temp.
@@ Line 65: / Line 79: @@
 Documentation is here: http://ukhas.org.uk/projects:jimbob:launch3
+Track it here: http://spacenear.us/tracker/ or http://habitat.habhub.org/mobile-tracker/
+Predictor based on Marston launch here: http://predict.habhub.org/hourly/marston/ or anywhere http://habhub.org/predict/ or http://weather.uwyo.edu/polar/balloon_traj.html
 Burst predictors are linked from here: http://ukhas.org.uk/guides:balloon_data
-Flight Path predictor is here: http://habhub.org/predict/ or an alternative here: http://weather.uwyo.edu/polar/balloon_traj.html