White Star SpeedBall-1 Flight Technical Details

The major flight for the White Star Balloon team's most advanced amateur balloon, Lally.

See sections below, and the table of contents on the right, for more details on each subsystem.

Goals for this mission:

  • Test new ballast algorithm
  • Test new Iridium satellite communications system
  • Collect science data on the effects of the high altitude environment on small long duration balloon performance.
  • Record video of balloon and vent operation

Science Data will be collected at a high rate, particularly at critical times such as ascent and float stabilization and day/night transitions.

Flight Summary

See this site for launch details: http://whitestarballoon.com/?p=826

Flight Plan

Take off 1 hour before local sunset, Climb to target float altitude of ~68,000ft, establish float in darkness. Float over the midwestern USA. Continue as many days as possible until consumables are exhausted.

Flight Details

Software System Requirements And Specification

Structure and Balloon

Payload Structures

Balloon

Zero Pressure Envelope LVL1.2 Zero Pressure Balloon Specs Polyethylene plastic envelope by Global Western Balloons.
Helium Overflow Vent Disc overflow vent, made by G. Flispart
1600g Hwoyee Latex tow baloon

Rigging

Overall Rigging Overall Rigging
Primary Payload to Envelope NEED DOCUMENTATION ASAP
Primary Payload to Ballast Payload Primary Payload to Ballast Payload

Onboard Systems

Electronics

  • Strobe

Power

Batteries

56 Energizer AA Lithium Cells

  • 5 parallel packs of 10 batteries in series
  • 2 in the top temperature sensor
  • 4 in a pack for cut down

Ballast System

Power Budgets

Main Power Controller Supply

Item Quantity Voltage (V) Max Current (A) Idle Current (A) Sleep Current (A) Est Duty Cycle (%)
Iridium Sat Modem 1
Comm Controller Board w/out Ext Modules 1 3.3 ? ? ? 100?
Flight Computer 1 3.3/~12 0.007/0.008 0.003/0.004 100
Video Cam Module 1 15
Balloon Sensor Bot 1 ~12 0.0101 0 0 1
Ballast Controller Board 1 100?
Ballast Solenoid 1 ~12 0.03 0 0 3
Strobe ~1 ~12 .15 60
Battery Heater (Not on bus) 1 ~12 0.5 0 0 1
GPS 1 3.3 0.04 - - 100
Arduino Fio 2 3.3 0.002 0.0005 ? 10%
Xbee 1 3.3 .045 0.015 ? 1%

Cutdown Controller Battery Pack

Item Quantity Voltage (V) Max Current (A) Idle Current (A) Sleep Current (A) Est Duty Cycle (%)
Cutdown Module 1 6 1.6 0.00074 - .000039

Envelope Top mounted battery pack

Item Quantity Voltage (V) Max Current (A) Idle Current (A) Sleep Current (A) Est Duty Cycle (%)
XBee 1 3 0.0073 ? ? 10

Weight Budget

https://spreadsheets0.google.com/ccc?key=tHnx27Mj3koVE81UjrM5L1w&hl=en#gid=0

2.72 payload limit per box

  • 3.1 total payload + empty ballast
  • 2.61 payload box
  • * 0.11 hf+coax
  • 0.48 empty ballast
  • * load 2.24kg ballast

Modules Needed

Module Design Hardware Software Unit Test Integration Test Complete Last Update Date
Power controller 100% 100% - 100% 100% 5/5   03/07/2011
Ballast System V1.0 100% 100% 100% 100% 100% 5/5   03/04/2011
Flight Computer 100% 100% 100% 100% 100% 5/5   03/07/2011
Communications Controller v1 100% 100% 100% 100% 100% 5/5   03/07/2011
VHF Satellite Antenna v1 100% 100% _ 100% 100% 5/5   01/30/2011
40m HF Radio by WB8ELK 100% 100% 100% 100% 100% 5/5   03/07/2011
Cutdown v1.1 100% 100% 100% 100% 100% 5/5   03/07/2011
Internal Sensor Controller v1 100% 100% 100% 100% 100% 5/5   03/07/2011
External Ambient Temp and Humidity Sensor Board v1 100% 100% N/A 100% 100% 5/5   03/07/2011
Strobe 100% 100% _ 100% 100% 5/5   03/07/2011
Batteries 100% 100% N/A 100% 100% 5/5   03/07/2011
Payload Box 100% 100% _ _ _ 5/5   03/07/2011
Rigging Lines 100% 100% _ _ _ 5/5   03/07/2011
Total Mission Readiness 100% 100% 100% 100% 100% 5/5   03/07/2011

Launch Site

Equipment List

White Star Space Port Item Description
Backup Primary Launch Site Lights (work lamps)
Orange Safety Cones (8 - 12)
Backup Primary Internet Connection
X Hearing Protection
X air band radios
X launch team radios
X Helium (1 full T-Cylinder, 1 backup T-Cylinder)
X enclosed fill site (hanger)
X Generator
X Anemometer
Primary Backup Gas Regulator and hose for helium tank
X Payload Stand
TOOLS
X butane soldering iron
X AC soldering iron
Primary Backup Crescent Wrench

Science Goals

This flight is primarily a scientific data collection flight. These are the questions we seek to answer with this and possibly the next flight.

  1. What is the temperature rise of the lift gas due to solar heating on this model of balloon?
    1. Method: multiple temperature sensors at different heights one temperature sensor inside the balloon
  2. How well does the trailing duct vent prevent night-time air entry on a small ZP balloon?
    1. Method: differential gas pressure sensor inside the bottom of the balloon
  3. What are the maximum internal pressures occur during initial climb to altitude?
    1. Method: differential gas pressure sensor inside the top of the balloon
  4. How well can cirrus cloud icing on small balloons be predicted?
    1. Method: Flight maneuvers will be made to avoid expected icing conditions. Altitude drop may indicate added ice weight.
  5. How well do inexpensive off-the-shelf humidity and dust sensors work for cloud detection?
    1. Method: Humidity and cloud sensors available from SparkFun
launches/speedball/1.txt · Last modified: 2012/05/11 21:11 by steamfire
 
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