Difference between revisions of "AirFish"
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[[Category:Science]] | [[Category:Science]] | ||
[[Category:Engineering]] | [[Category:Engineering]] | ||
+ | |||
+ | AirFish or Air Fish | ||
+ | |||
=== Basecamp === | === Basecamp === | ||
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Aprox 150g total weight = 94g body + 50g batteries (2-AA) | Aprox 150g total weight = 94g body + 50g batteries (2-AA) | ||
+ | |||
+ | == hydrogen == | ||
+ | |||
+ | Reactions: | ||
+ | # Sodium hydroxide + Aluminum | ||
+ | #Hydrochloric acid + Zinc | ||
+ | # Calcium hydride and water (See "Hydrogen Generator ML-303/TM and Hydrogen Generator Set AN/TMQ-3", January 1, 1990, Publisher: Departments of the Army and Air Force) | ||
+ | |||
+ | [http://www.pilotballoon.com/hydsafty.htm Pilot Balloons Hydrogen Safety] | ||
== helium supplies SF == | == helium supplies SF == | ||
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disposable 50 balloon tank $35 | disposable 50 balloon tank $35 | ||
+ | == Balloon suppliers == | ||
+ | |||
+ | http://kaymontballoons.com/ | ||
+ | |||
+ | http://www.scientificsales.com/ | ||
+ | |||
+ | http://www.novalynx.com/400-balloons.html | ||
== payload computers == | == payload computers == | ||
+ | |||
=== Phidgets === | === Phidgets === | ||
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== S60 control == | == S60 control == | ||
+ | |||
=== Send an SMS with S60 === | === Send an SMS with S60 === | ||
− | This | + | This stuff looks trivial. This could be a very viable downlink. http://wiki.forum.nokia.com/index.php/How_to_send_SMS |
import messaging | import messaging | ||
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</table> | </table> | ||
+ | |||
+ | == See also == | ||
+ | |||
+ | [http://www.pilotballoon.com/ Pilot Balloon Observation Theodolites] |
Latest revision as of 11:00, 15 October 2013
AirFish or Air Fish
Contents
Basecamp
The project management is through AirFish Basecamp
weight of line to estimate length
I let the balloon go nearly 90 degrees vertical up. I didn't know the length of the line. When I pulled it back in I weighed the line at 35.75 g. I figured that later I could weigh pieces of known lengths of the line to estimate the total length.
Lift of balloon
- The volume of a sphere is 4/3 * pi * r^3, where r is the radius of the balloon.
- One cubic foot of helium will lift about 28.2 grams, so multiply the volume of the balloon by 28.2.
- Divide by 448 -- the number of grams in a pound -- to determine the number of pounds it can lift.
(4/3) * pi * (r^3) * 28.2 = lift in grams ((4/3) * pi * (r^3) * 28.2) / 448 = lift in pounds
Flip Video Camera
Aprox 150g total weight = 94g body + 50g batteries (2-AA)
hydrogen
Reactions:
- Sodium hydroxide + Aluminum
- Hydrochloric acid + Zinc
- Calcium hydride and water (See "Hydrogen Generator ML-303/TM and Hydrogen Generator Set AN/TMQ-3", January 1, 1990, Publisher: Departments of the Army and Air Force)
Pilot Balloons Hydrogen Safety
helium supplies SF
Party Warehouse
28 Westlake Ave, Daly City, CA THE MAP IS INCORRECT. IT IS A FEW BLOCKS SOUTH IN THE WESTLAKE MALL. http://maps.google.com/maps?f=q&hl=en&geocode=&q=28+Westlake+Ave,+Daly+City,+CA&sll=37.0625,-95.677068&sspn=79.379181,85.429688&ie=UTF8&ll=37.6999,-122.464256&spn=0.010068,0.010428&z=16&iwloc=addr (650) 992-5570
rental $10 - 25 balloons rental $20 - 72 balloons disposable $30 - 50 balloons
We were pretty happy with this place. The prices were cheap.
Party City: Daly City
317 Gellert Blvd, Daly City, CA (650) 756-0215 -
disposable 30 balloon tank $30 disposable 50 balloon tank $35
Balloon suppliers
http://www.scientificsales.com/
http://www.novalynx.com/400-balloons.html
payload computers
Phidgets
They sell a rather expensive pressure sensor ($50), but it looks like it might be easy to interface 1115 Pressure Sensor. It plugs into the analog input of the Phidget Interface kit (Phidgets: 1018, 1202 or 1203). It measures absolute pressure 20 to 250 kPa (2.9 to 36.3 psi). This means it's probably not much good above 35000 feet.
S60 control
Send an SMS with S60
This stuff looks trivial. This could be a very viable downlink. http://wiki.forum.nokia.com/index.php/How_to_send_SMS
import messaging messaging.sms_send('number', 'text')
pyspy
http://sourceforge.net/projects/pyspy http://www.symbian-freak.com/forum/viewtopic.php?t=15756
Pressure versus Altitude
See also Boyle's Law.
volume of helium at altitudes.
Barometric Pressure vs. Altitude Table | |||||||||
Altitude Above Sea Level |
Temperature |
Barometer |
Atmospheric Pressure |
||||||
Feet |
Miles |
Meters |
F |
C |
In. Hg. Abs. |
mm Hg. Abs. |
PSI |
Kg / sq. cm |
kPa |
-5000 |
-1526 |
77 |
25 |
35.58 |
903.7 |
17.48 |
1.229 |
120.5 |
|
-4500 |
|
-1373 |
75 |
24 |
35.00 |
889.0 |
17.19 |
1.209 |
118.5 |
-4000 |
|
-1220 |
73 |
23 |
34.42 |
874.3 |
16.9 |
1.188 |
116.5 |
-3500 |
|
-1068 |
71 |
22 |
33.84 |
859.5 |
16.62 |
1.169 |
114.6 |
-3000 |
|
-915 |
70 |
21 |
33.27 |
845.1 |
16.34 |
1.149 |
112.7 |
-2500 |
|
-763 |
68 |
20 |
32.70 |
830.6 |
16.06 |
1.129 |
110.7 |
-2000 |
|
-610 |
66 |
19 |
32.14 |
816.4 |
15.78 |
1.109 |
108.8 |
-1500 |
|
-458 |
64 |
18 |
31.58 |
802.1 |
15.51 |
1.091 |
106.9 |
-1000 |
|
-305 |
63 |
17 |
31.02 |
787.9 |
15.23 |
1.071 |
105.0 |
-500 |
|
-153 |
61 |
16 |
30.47 |
773.9 |
14.96 |
1.052 |
103.1 |
0 |
|
0 |
59 |
15 |
29.92 |
760.0 |
14.696 |
1.0333 |
101.33 |
500 |
|
153 |
57 |
14 |
29.38 |
746.3 |
14.43 |
1.015 |
99.49 |
1000 |
|
305 |
55 |
13 |
28.86 |
733.0 |
14.16 |
0.996 |
97.63 |
1500 |
|
458 |
54 |
12 |
28.33 |
719.6 |
13.91 |
0.978 |
95.91 |
2000 |
|
610 |
52 |
11 |
27.82 |
706.6 |
13.66 |
0.960 |
94.19 |
2500 |
|
763 |
50 |
10 |
27.32 |
693.9 |
13.41 |
0.943 |
92.46 |
3000 |
|
915 |
48 |
9 |
26.82 |
681.2 |
13.17 |
0.926 |
90.81 |
3500 |
|
1068 |
47 |
8 |
26.33 |
668.8 |
12.93 |
0.909 |
89.15 |
4000 |
|
1220 |
45 |
7 |
25.84 |
656.3 |
12.69 |
0.892 |
87.49 |
4500 |
|
1373 |
43 |
6 |
25.37 |
644.4 |
12.46 |
0.876 |
85.91 |
5000 |
0.95 |
1526 |
41 |
5 |
24.90 |
632.5 |
12.23 |
0.86 |
84.33 |
6000 |
1.1 |
1831 |
38 |
3 |
23.99 |
609.3 |
11.78 |
0.828 |
81.22 |
7000 |
1.3 |
2136 |
34 |
1 |
23.10 |
586.7 |
11.34 |
0.797 |
78.19 |
8000 |
1.5 |
2441 |
31 |
-1 |
22.23 |
564.6 |
10.91 |
0.767 |
75.22 |
9000 |
1.7 |
2746 |
27 |
-3 |
21.39 |
543.3 |
10.5 |
0.738 |
72.40 |
10,000 |
1.9 |
3050 |
23 |
-5 |
20.58 |
522.7 |
10.1 |
0.71 |
69.64 |
15,000 |
2.8 |
4577 |
6 |
-14 |
16.89 |
429.0 |
8.29 |
0.583 |
57.16 |
20,000 |
3.8 |
6102 |
-12 |
-24 |
13.76 |
349.5 |
6.76 |
0.475 |
46.61 |
25,000 |
4.7 |
7628 |
-30 |
-34 |
11.12 |
282.4 |
5.46 |
0.384 |
37.65 |
30,000 |
5.7 |
9153 |
-48 |
-44 |
8.903 |
226.1 |
4.37 |
0.307 |
30.13 |
35,000 |
6.6 |
10,679 |
-66 |
-54 |
7.06 |
179.3 |
3.47 |
0.244 |
23.93 |
40,000 |
7.6 |
12,204 |
-70 |
-57 |
5.558 |
141.2 |
2.73 |
0.192 |
18.82 |
45,000 |
8.5 |
13,730 |
-70 |
-57 |
4.375 |
111.1 |
2.15 |
0.151 |
14.82 |
50,000 |
9.5 |
15,255 |
-70 |
-57 |
3.444 |
87.5 |
1.69 |
0.119 |
11.65 |
55,000 |
10.4 |
16,781 |
-70 |
-57 |
2.712 |
68.9 |
1.33 |
0.0935 |
9.17 |
60,000 |
11.4 |
18,306 |
-70 |
-57 |
2.135 |
54.2 |
1.05 |
0.0738 |
7.24 |
70,000 |
13.3 |
21,357 |
-67 |
-55 |
1.325 |
33.7 |
0.651 |
0.651 |
4.49 |
80,000 |
15.2 |
24,408 |
-62 |
-52 |
0.8273 |
21.0 |
0.406 |
0.406 |
2.80 |
90,000 |
17.1 |
27,459 |
-57 |
-59 |
0.520 |
13.2 |
0.255 |
0.255 |
1.76 |
100,000 |
18.9 |
30,510 |
-51 |
-46 |
0.329 |
8.36 |
0.162 |
0.162 |
1.12 |