3 New White Huge 200 Gram Weather Balloons 8 feet Meteorological

Description

3 New 200 Gram White Weather Balloons
This is 3 new and unopened 200 gram weather balloons.  They are double sealed in an airtight package.  That is it's sealed within a plastic bag
and then that bag is sealed inside another bag.  I assume that's to prevent it from being aged by the air.  They were manufactured in July of
2013.  They expired in July of 2015.  Though they have officially expired there is still plenty of life in these balloons.  They are in perfect
condition.
They are natural latex color.  When they are inflated they are a pearly white.  Uninflated they are roughly oval shaped and measures about 20 inches across
and 30 inches tall.  They were manufactured by Kaymont Consolidated Industries.
These balloons, as all weather balloons, are delicate. It has nothing to do with the age and everything to do with the material. Like all
balloons the more it's filled the more delicate it becomes. If it's filled to 4 - 4 1/2 feet it has taken shape and is rather flexible
and forgiving. It can be filled to 6-7 feet but it is much more sensitive and likely to pop. Note if it hits a tree it will almost surely
pop. Things like grass and debris on the ground can destroy it as well. I've inflated several weather balloons of various sizes and
it's always best to have at least two people. One to hold the balloon and one to manage the filling process. Also, if you're interested
in high altitude experimentation please understand that as the balloon rises it will expand. You only want to fill it enough to get a
good lift on your payload. These balloons were designed for single use, but if you're very careful I suspect it could be reused.
Here are the details based upon the NSN of 6660-01-558-3628.  Note these are the manufacturing specifications.  I have not validated
these parameters:
Criteria
Characteristic
NAME
BALLOON, METEOROLOGICAL
COLOR
NATURAL LATEX
FLACCID BODY LENGTH
86 CM/33.85 INCHES
BARELY INFLATED DIAMETER
55 CM/21.65 INCHES
NECK LENGTH
12 CM/4.72 INCHES
NECK DIAMETER
3 CM/1.18 INCHES
WEIGHT
200.0 GRAMS
PAYLOAD
250 GRAMS/8.818 OUNCES
NOZZLE LIFT
760 GRAMS/26.8 OUNCES
RECOMMENDED FREE LIFT
510 GRAMS/18 OUNCES
GROSS LIFT
960 GRAMS/33.86 OUNCES
DIAMETER AT RELEASE
117 CM/46 INCHES
VOLUME AT RELEASE
0.83 CU M/29.31 CU FT
RATE OF ASCENT
320 M PER MIN/1049 FT PER MIN
MINIMUM BURSTING DIAMETER
300 CM/10 FEET
MINIMUM BURSTING ALTITUDE
21.2 KM/70,000 FEET
BURSTING PRESSURE
45.3 HPA
MATERIAL
MULTILAYERED LATEX FILM
Buyer pays .95 for USPS shipping within the US.  Residents of Georgia must pay 6% sales tax.
International shipping is available.