400-82xx Series Weather Balloons
400-82xx Series Weather Balloons 400-82xx Series Weather Balloons

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400-82xx Series Weather Balloons

The Group 400 Weather Balloons are produced by rotational molding of natural rubber. Their uniform wall thickness prevents premature blowouts, and they are ozone resistant. Reinforced necks allow use in strong winds without tearing. These balloons are not recommended for tethering.

Each balloon is inflated, inspected, and tested before being dusted and sealed in a moistureproof polyethylene bag. They may be stored up to seven years if kept in a cool, dark room. No preflight conditioning is required.

Two basic types of meteorological balloons are available from NovaLynx. The smaller pilot (or ceiling) balloons are usually tracked with a theodolite. These balloons are not designed to carry a payload. Three different colors provide easier sighting under varying weather conditions. The natural color has the greatest visibility on clear days; red is easiest to see in scattered clouds; and black is best for overcast conditions. Small lights can be used to illuminate pilot balloons for easier sighting during nighttime observations. Balloon weight is chosen based on the altitude and ascent rate required.

The larger sounding balloons are designed to carry a radiosonde aloft, and these balloons are usually used in conjunction with a rawinsonde tracking station. They can also carry other types of payload, such as radar targets. The burst altitude required should be used to determine the balloon weight needed.

Sounding balloons can carry payloads greater than those listed in the chart if the gross lift of the balloon is increased. This is done by increasing the inflation volume. (Note the burst diameter of the balloon to avoid overfilling.) The ascent rate and burst altitude will vary from the values given.

Specifications are based on performance tests conducted at the factory. They are taken from hydrogen-inflated balloons. Helium inflation may provide different results.

Model Nominal Weight Color Neck Diameter Uninflated Diameter Std Inflated Diameter Burst Diameter
  gm   in (mm) in (cm) ft (cm) ft (cm)
Pilot Balloons
400-8210 10 red 0.9 (23) 3.2 (8) 1.5 (46) 2.0 (60)
400-8211 10 black 0.9 (23) 3.2 (8) 1.5 (46) 2.0 (60)
400-8230 30 red 0.6 (14) 7.1 (18) 2.1 (64) 3.3 (102)
400-8231 30 black 0.6 (14) 7.1 (18) 2.1 (64) 3.3 (102)
400-8232 30 natural 0.6 (14) 7.1 (18) 2.1 (64) 3.3 (102)
400-8233 100 red 0.6 (14) 13.8 (35) 2.4 (74) 4.4 (133)
400-8234 100 black 0.6 (14) 13.8 (35) 2.4 (74) 4.4 (133)
400-8235 100 natural 0.6 (14) 13.8 (35) 2.4 (74) 4.4 (133)
400-8236 200 natural 1.3 (32) 18.9 (48) 3.9 (118) 8.9 (270)
Sounding Balloons
400-8237 300 natural 1.3 (32) 23.6 (60) 5.0 (154) 12.8 (390)
400-8239 500 natural 1.3 (32) 32.7 (83) 5.7 (175) 17.7 (540)
400-8242 800 natural 1.3 (32) 42.5 (108) 6.1 (185) 22.3 (680)
Accessories
400-8060 Parachute
400-8260-10 10GM Balloon Filling System, includes pressure hose, valve, and 10gm weighted nozzle
400-8266 Helium Tank Regulator
400-8318 Pilot Balloon Light, 2.5 volt, 0.3 amp bulb, water-activated battery, weight 0.34 oz

 

Performance Test Specifications
Balloon Weight Free Lift Payload Gross Lift Inflation Volume Inflation Diameter Ascent Rate Altitude at Burst
gm gm gm gm ft3 (m3) ft (m) m/min mi (km)
Pilot Balloons
10 50 -- 60 1.9 (0.05) 1.5 (0.5) 150 4.3 (7)
30 140 -- 170 5.5 (0.16) 2.2 (0.7) 200 7.8 (12.5)
100 160 -- 260 8.4 (0.24) 2.5 (0.8) 200 9.3 (15)
200 850 -- 1050 33.9 (0.96) 4.0 (1.2) 350 11.8 (19)
Sounding Balloons
300 1400 630 2330 75.2 (2.1) 5.2 (1.6) 400 13.0 (21)
500 1700 1150 3350 108.1 (3.1) 5.9 (l.8) 400 15.2 (24.5)
800 2000 1150 3950 127.4 (3.6) 6.2 (1.9) 400 17.4 (28)

Please call for information regarding:

  • 400-8060 Parachute
  • 400-8260-10 10gm Balloon Filling System
  • 400-8266 Helium Tank Regulator
  • 400-8318 Pilot Balloon Light

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