Total-head meter with small sensitivity to yaw Page: 4 of 11
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by means of a fixed in.
T:ae se caib b ra tAonsC
y. As the coefficient
.he lift and velocity
torm. To nse calibra..
The premise for the satisfactory me as-urement of the
dynamic ptressure is .- the exact record in of the total Lead
as ell as of the static pressure. However, inasmiuch as
the bcat ion for noun'ting; the totalheatd moter a bea
expos.ed to cons id!erable cha uges in air-flMow diioction, the
total head meter must be snch as to assure an accurate
record. even in considerable yaw.
A siall sensitivity of total-head remains i n yaw ma,
be aievein variou l is .ays. Foer exmpA le a freely rot
iAg in strunent may b se.d; ot such d devices are frequet
ly unIt.and .y becauho 0se of thei: ule, s a: e fret the fact that
In< a rot ationaily syoe-trical cylis. er of suitable
leI- ~t, in aw tie aim stran e w ithi the cy i8nder is de-
flected to a eater or lesser extent, according to the
d.re eo yai w intjIto the aial directions of t he cylinder
he ..co .ditio ns a -re illust rated in f. iure,. . .. e for ae simpl e.1 ,e
cyl.ider, and in figu\r.-e 2 r, f or venJtu~ 0ri . ....sh1oaped cylinder .
BothI are of l.ass so as to s?ow the flow i't>in The
Siqu... id ...was ,,,.. \ate"r it min.ute sZlvjei,...r. crystals ( ofent'ce i)
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Kiel, G. Total-head meter with small sensitivity to yaw, report, August 1, 1935; (digital.library.unt.edu/ark:/67531/metadc63447/m1/4/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.