“Gross”26 pages
- p. 143 …Robert Gross ar.d 't!r. Jlaher of Lockheed
11~ 55 A.'.!. Gen. Sam Anderson
12…
- p. 481 …Balloon Volume x Gas Lift
Gross Load ·
It may be noted from this equation that a…
- p. 482 …Balloon Volume x 24.4
Gross Load
K
=-w
K _ 08.o475Z
In turn, w-in…
- p. 483 …free lift in pounds
and G is gross lift in pounds.
Although this equation was derived…
- p. 488 …By equation
{10), with a gross load of 52 kg., the unbalance caused by loss
of…
- p. 500 …or a gross
buoyancy of 450 lb. • the maximum allowable infle.tion of a 30'
diameter…
- p. 569 …accelerating
force equal to 5% of the gross load (52 kg) was acting to bring the…
- p. 643 …000 feet.
In one step, this becomes:
Gross Lift/Balloon = (Balloon Volume) x (Difference in molecular…
- p. 650 (Approximate)
where G • gross load
A chart, Figure 24, has beendrawn up, based on this equation…
- p. 652 …G = loss of lift
G =gross load (balloon weight plus
equipment load)
AT : mean temperature difference…
- p. 653 …not including balloon or its integral
parts.
Gross load: Load on the gas at release (Balloon…
- p. 726 …Ballast • • .. • • '" •
Total Equipment l~eight. • • • • '
Gross Load • • ' • • • •
{56)
- p. 727 …Balloon volwne x gas litt/mol
gross load
cu. ft.
-----------------NAximum Altitude • • • ft, m.s.l…
- p. 741 …altitude deter-
mined by the displacement and gross load.
7. Control systems
Two systems of control…
- p. 777 …By adjusting th~ gross load to be
supported by the gas to equal the total lift…
- p. 787 …Computations
A chart showi~ the relation between altitude, gross lift, and
balloon size has been found…
- p. 883 …The gross load reported should be
accurate to the nearest 200 grams. The amount of lifting…
- p. 885 …A L L 0 0 N
7300 ,, GRoss LoAD
Fl G. 17
NYU BALLOON pROJECT I…
- p. 887 …bubble length and resultant inflated volume,
using gross lift as an expression of volume. It will…
- p. 889 …in Appendix II summarizes the relationship between gross
load and floating level for balloons of several…
- p. 925 …A can of sand
is made to weigh the same amount as the required gross lift…
- p. 933 …the balloon with the equipment
load attached.
Gross Lift: Lift of all of the gas in…
- p. 938 …description.______________
Drag chute ----------------------------
Banner description --------------- ----------
Ballast assembly - description -----------~--
Ballast • • • • • •
Total Equipment i'ieight • • ' • • • • • •
Gross Load • • • • • • • • • • •
-86-
- p. 939 …wnitin_,g________ grams
Actual balloon lift • • • • • • • • ". . .•
II
AActunl gross lift (Balloon lift & balloon wt.) •
Number Helium…
- p. 943 …Gross Lift vs. Bubble Length • • • • • • .107
Graph 3: Buoyancy vs. Altitude • • • • • • • • • .108
Graph 4: Gross Load…
- p. 955 …BALLOOO DA 'fA
General Mills Actual Balloon Estimated Gross Altitude
~ominal Diiameter Volwne Weight Load Limit…
(a)
Then:
(9)
or for small temperature differences:
(10) : - _L (.AI.)1-B T
the nega,tive sign indicating a loss of lift.
From this equation we may approximate the amount of ballast re-
quired to compensate for the loss of superheat of the lifting .gas.
It is apparent, then, that the amount of superheat gained or lost
by a balloon 1 s ga• is of extreme importance to the control of the
,,_ight.
For this reason a transparent film has a definite advantage over a
reflecting fabric. For example, alumin~coated fabric balloons
floating at 40,000 feet have exhibited lifting gas superheat in
the neighborhood of 40°C.* Polyethylene balloons, on the other
hand, Show superheat of approximately lOOC under the same conditions.
Assuming a total weight of 30 kilograms in the balloon system, with
helium as the lifting gas ~ B ~ t ), the following compensation
at sunset, or when superheat is lost, will be necessary:
Aluminized fabric:
Polyethylene'
AI:. -L -
-- 4.7 OJo
*This will explein the repid descent of flight with fabric balloons and
will show the need for high ·rates of ballast flow at sunset with poly-
ethylene balloon flig,hts (see Part III., "Summary of Flights," of this
report).
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