Difference between revisions of "High Altitude Ballooning"

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== 2011 High Altitude Balloon (HAB) Dec 3, 2011 Launch (FHSU Phys 100 class project) ==
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==Fall 2011 Phys 100==
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This was the first year of the high altitude ballooning project and was a learning experience on how to launch the balloon. This section gives some important information for starting a ballooning project.
 +
 
 +
===Photos===
 +
Successful launch and recovery!
 +
 
 +
[[File:Balloon.jpg]]
 +
[[File:Hays.jpg]]
 +
[[File:Space.jpg]]
 +
[[File:Wilson.jpg]]
 +
[[File:Landing eastI70.jpg]]
 +
[[File:Pickup.jpg]]
 +
 
 +
 
 +
===Equipment===
  
 
Notes (from EXTREMELY HELPFUL discussions with Paul Verhage, check out http://www.nearspacenetwork.com):
 
Notes (from EXTREMELY HELPFUL discussions with Paul Verhage, check out http://www.nearspacenetwork.com):
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'''Latex Weather Balloon''' ($90), http://www.amazon.com/30ft-Professional-Weather-Balloon-1200g/dp/B00513FWQI
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'''Totex Weather Balloon''' ($?), http://kaymontballoons.com/Near_Space_Photography.html
  
 
Specifications:  
 
Specifications:  
  
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mass = 1.2 kg, 10ft diameter at release, 30 ft diameter at burst
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mass = 1.2 kg, 3cm neck diameter (use 1" pvc), 28 ft diameter at burst
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Nominal lift: 7.6 lbs
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Maximum lift: 15 lbs
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(We tried a Project Aether balloon on Dec 4th and it bursts as we were filling it...not a bad idea to have a backup balloon for launches)
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Nominal burst altitude: 115,000 ft 
 
  
  
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'''Parachute''' ($55), 6ft, 173 g or 6.1 oz, http://www.the-rocketman.com
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'''Parachute''' ($55), 6ft, 173 g or 6.1 oz; 8.0 oz with wire frame, http://www.the-rocketman.com
  
 
Specifications:
 
Specifications:
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'''String'''
 
'''String'''
  
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We are using 250 lb test nylon kite string (500 ft roll).
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We are using 250 lb test polyester line (2.0 g / meter, 500 ft roll) and Eagle Claw size 1/0 barrel swivels (125 lb test?, mass = 1.6 g each).
 +
 
  
 +
'''Payload total mass''', 4.62 kg or ~10.2 lbs. Thus balloon needs to be filled so that it lifts with a force of ~13.2 lbs.
  
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'''Payload container''', Put foam on bottom to act as a shock absorber.  
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'''Payload container, primary (Jon's box)''', Ready to launch mass: 1.375 kg.
 +
 
 +
'''Payload container, lunchbox tracker (Jon's tracker)''', Ready to launch mass: 1.143 kg. 
 +
 
 +
'''Payload container, secondary (PHYS100)''', Ready to launch mass: 1.93 kg.
 +
 
 +
Made from 1" thick R-5.0 "pink panther" 'Foamular 150' material, hot glue, silicone, and 2" coarse thread drywall screws (x16, for a total mass of 47.5 g). Payload container mass with no tape or electronics inside: 460 g.
 +
 
 +
[[File:Prodogy_I.skp]]
 +
 
 +
[[File:Prodogy_I.png]]
 +
 
  
  
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Specifications:  
 
Specifications:  
 +
 +
Mass: 221 g.
  
 
12.1 MP Waterproof Digital Camera with 3x Optical Image Stabilized Zoom and 2.5-Inch LCD
 
12.1 MP Waterproof Digital Camera with 3x Optical Image Stabilized Zoom and 2.5-Inch LCD
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Using a 4 GB SDHC card and CHDK camera firmware... http://chdk.wikia.com/wiki/CHDK
 
Using a 4 GB SDHC card and CHDK camera firmware... http://chdk.wikia.com/wiki/CHDK
  
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Used Acid to determine that the firmware was 100B, then used CardTricks 144 to flash the firmware to format (fat16) and flash the 4GB SDHC card (make sure card slider is towards pins for reading, away from camera pins for booting camera). Modified script from sparkfun.com: hab.bas
+
Used Acid to determine that the firmware was 100B, then used CardTricks 144 to flash the firmware (d10-100b-0.9.9-1434-full_BETA.zip) to format (fat16) and flash the 4GB SDHC card (make sure card slider is towards pins for reading, away from camera pins for booting camera). Modified script from sparkfun.com: hab.bas
  
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@title HAB FHSU
 
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@param a Interval (Secs)
 
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@default a 20
 
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@param b Secs until 1st shoot
 
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@default b 20
 
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@param c Turn off display (0=no, 1=yes)
 
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@default c 1
 
  
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t=get_tick_count
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<div style="background: white; border: 1px solid rgb(153, 153, 153); padding: 1em;">
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d=a*1000
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<code>
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s=t+((b-(15/10))*1000)
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@title HAB FHSU <br />
 +
@param a Interval (Secs) <br />
 +
@default a 20 <br />
 +
@param b Secs until 1st shoot <br />
 +
@default b 20 <br />
 +
@param c Turn off display (0=no, 1=yes) <br />
 +
@default c 1 <br />
 +
 
 +
t=get_tick_count <br />
 +
d=a*1000 <br />
 +
s=t+((b-(15/10))*1000) <br />
  
 
goto "shoot"
 
goto "shoot"
  
 
:shoot
 
:shoot
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if get_tick_count<s then goto "shoot"
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if get_tick_count<s then goto "shoot" <br />
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s=s+d
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s=s+d <br />
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shoot
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shoot <br />
 
goto "shoot"
 
goto "shoot"
  
−
end
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end</code>
 +
</div>
  
 
Use the play button to turn camera on and autoload the CHDK firmware, which will start taking pics every 20 seconds... (auto focus, auto exposure). To get the display to shut off (and conserve the battery) just insert a usb cable into the camera that is not terminated.  
 
Use the play button to turn camera on and autoload the CHDK firmware, which will start taking pics every 20 seconds... (auto focus, auto exposure). To get the display to shut off (and conserve the battery) just insert a usb cable into the camera that is not terminated.  
  
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Tested (freezer in TH226): temp ??
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Tested (freezer in TH226, temp -18 '''°'''C):<br />
 
Camera took 350 images (4000x3000 pixels, jpeg) before the battery died in 2h15m (images take up 386MB).
 
Camera took 350 images (4000x3000 pixels, jpeg) before the battery died in 2h15m (images take up 386MB).
  
Line 89: Line 122:
 
   
 
   
  
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'''SPOT Tracker''' ($320), http://www.findmespot.com/en/
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'''SPOT Tracker''' ($320) mass 120 g, http://www.findmespot.com/en/
  
 
Tracks... http://share.findmespot.com/shared/faces/viewspots.jsp?glId=0obLunbKoqbsUuEq5OyCLRQX3c3lWMFdo
 
Tracks... http://share.findmespot.com/shared/faces/viewspots.jsp?glId=0obLunbKoqbsUuEq5OyCLRQX3c3lWMFdo
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'''Vernier LabPro''' http://www.vernier.com/products/interfaces/labpro/
 
'''Vernier LabPro''' http://www.vernier.com/products/interfaces/labpro/
 +
 +
Mass of LabPro with batteries: 376 g.

Latest revision as of 21:31, 16 January 2014

Fall 2011 Phys 100

This was the first year of the high altitude ballooning project and was a learning experience on how to launch the balloon. This section gives some important information for starting a ballooning project.

Photos

Successful launch and recovery!

Balloon.jpg Hays.jpg Space.jpg Wilson.jpg Landing eastI70.jpg Pickup.jpg


Equipment

Notes (from EXTREMELY HELPFUL discussions with Paul Verhage, check out http://www.nearspacenetwork.com):

NOTAM (Notice to Airmen for HiBall) Phone Number: 877.487.6867

Don't launch if the winds are in excess of 10 mph. When filling the balloon, fill with no regulator. Use cotton or latex gloves to handle the balloon. Fill balloon with a 1" PVC pipe with end-cap adapter to gas line (the PVC has a hook on it so a digital fish scale can be attached). Fill the balloon so that the lift force exceeds the payload weight by about 2.5 - 3 lbs. (If the lift force exceeds the payload weight by only ~1 lb it is possible to achieve neutral buoyancy!) To tie off balloon: twist rubber and then tie string around the balloon's neck where the rubber is thick, then fold the neck up and wrap with duct tape. Put about 20 ft of line between the balloon and parachute.


Trajectory predictions

http://habhub.org/predict/

http://nearspaceventures.com/w3Baltrak/readyget.pl (Hays airport is HYS)


GPS/Radio Tracking (N8VRN)

http://aprs.fi/


Totex Weather Balloon ($?), http://kaymontballoons.com/Near_Space_Photography.html

Specifications:

mass = 1.2 kg, 3cm neck diameter (use 1" pvc), 28 ft diameter at burst

(We tried a Project Aether balloon on Dec 4th and it bursts as we were filling it...not a bad idea to have a backup balloon for launches)


Parachute ($55), 6ft, 173 g or 6.1 oz; 8.0 oz with wire frame, http://www.the-rocketman.com

Specifications:

Weight: Descent speed: 6.5 lb (4.77 m/s, 15.65 ft/s) 8 lb (5.39 m/s, 17.67 ft/s) 11.5 lb (6.35 m/s, 20.82 ft/s) 17 lb (7.72 m/s, 25.32 ft/s)


String

We are using 250 lb test polyester line (2.0 g / meter, 500 ft roll) and Eagle Claw size 1/0 barrel swivels (125 lb test?, mass = 1.6 g each).


Payload total mass, 4.62 kg or ~10.2 lbs. Thus balloon needs to be filled so that it lifts with a force of ~13.2 lbs.

Payload container, primary (Jon's box), Ready to launch mass: 1.375 kg.

Payload container, lunchbox tracker (Jon's tracker), Ready to launch mass: 1.143 kg.

Payload container, secondary (PHYS100), Ready to launch mass: 1.93 kg.

Made from 1" thick R-5.0 "pink panther" 'Foamular 150' material, hot glue, silicone, and 2" coarse thread drywall screws (x16, for a total mass of 47.5 g). Payload container mass with no tape or electronics inside: 460 g.

File:Prodogy I.skp

Prodogy I.png


Digital Camera ($270), Canon PowerShot D10, http://usa.canon.com/cusa/consumer/products/cameras/digital_cameras/powershot_d10

Specifications:

Mass: 221 g.

12.1 MP Waterproof Digital Camera with 3x Optical Image Stabilized Zoom and 2.5-Inch LCD

Using a 4 GB SDHC card and CHDK camera firmware... http://chdk.wikia.com/wiki/CHDK

Used Acid to determine that the firmware was 100B, then used CardTricks 144 to flash the firmware (d10-100b-0.9.9-1434-full_BETA.zip) to format (fat16) and flash the 4GB SDHC card (make sure card slider is towards pins for reading, away from camera pins for booting camera). Modified script from sparkfun.com: hab.bas


@title HAB FHSU
@param a Interval (Secs)
@default a 20
@param b Secs until 1st shoot
@default b 20
@param c Turn off display (0=no, 1=yes)
@default c 1

t=get_tick_count
d=a*1000
s=t+((b-(15/10))*1000)

goto "shoot"

shoot

if get_tick_count<s then goto "shoot"
s=s+d
shoot
goto "shoot"

end

Use the play button to turn camera on and autoload the CHDK firmware, which will start taking pics every 20 seconds... (auto focus, auto exposure). To get the display to shut off (and conserve the battery) just insert a usb cable into the camera that is not terminated.

Tested (freezer in TH226, temp -18 °C):
Camera took 350 images (4000x3000 pixels, jpeg) before the battery died in 2h15m (images take up 386MB).



SPOT Tracker ($320) mass 120 g, http://www.findmespot.com/en/

Tracks... http://share.findmespot.com/shared/faces/viewspots.jsp?glId=0obLunbKoqbsUuEq5OyCLRQX3c3lWMFdo


Vernier LabPro http://www.vernier.com/products/interfaces/labpro/

Mass of LabPro with batteries: 376 g.

Retrieved from "http://fourier.fhsu.edu/index.php?title=High_Altitude_Ballooning&oldid=608"