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BULLETIN NQ. Hell <br /> AM VEWIWJL <br />! WM � DYER ZMA <br /> AIR VELOCITY <br /> Thai total pressure of an air streaial tiowing In a duct Is Thai sura or the static or bursting pressure eserred <br /> upon Tile srdeweils of the duet mild the Inret or vesealry pressure o► me rooting air Thsougit the use of a <br /> pltat tube connected dtffe Mtoaify ro o *Mnomerer, the velocity pressure •Lanai is indicated and the car. <br /> rasoonding air velocity dehmt"ed. <br /> For accuracy at plus or minus 2:,as in laboratory applications, estrame ewe is required and the fallowing <br /> prrrcoutlons sefeeld be observed <br /> Duct drar"eter A' or greater .����.• <br /> r rw+ <br /> Make an acCurate traverse Der skatefl at <br /> Fight, COICWafe the voiacitles and Gv- o <br /> •rage me r"Oongs <br /> Prowse smooth. stralgnT duct searons �n. #.r i <br /> a rninsmurn or 8fi niornerars in lengrn e.(�• " f J <br /> uosrrearn and 1 h alarnorers down- *-- - — — <br /> stream front rye Pitot Tube <br /> a Provide an egg crate type straigntener <br /> JOSrrearn morn Tne Orfaf rubai <br /> n Aaillrttg aft mit vesocity cnecs select a location as suogesfed above, connect tubing $saes from mold phot <br /> ruse co"tie4mons to the eanerwater and Inset► em the over ■ ith the ho alreatmol Into the n► stream. If the <br /> Qr#ontater show6 a minus indication remorse the 90606. Myth a arrect reading manometer,air ve$ocs'nes wtil <br /> .r oe snow" rn toot pair ntrnvte lav atwer types, the mdnwefer wtii road velocity pressure in Inches at <br /> wa: o"d 4010 C:011e60004609 velocity veil he fawn* from the curves in this ouiienw. If c9rcumstumms do <br /> -$of merit an accurate Traverse, center five peter Twos rn the duct, determine trig center veieclty Otis laeitr. <br /> ziy ay a tractor of 9 for awe **proximate average velocity Field tests rv® In this manner shairid be cc. <br /> =urate wlttiln plus or minus 5%. <br /> ne velocity inamoted r6 for err air at 7" , 4-9 9" Seramatric Pressure ora a resuiting density of {TIS:/ <br /> _u fr For al► of a temiseroture other then 70OF rotor to The curves in this ariiotrn. For other variations <br /> +role tnesai conditions, corrections may be bais•r •pair+ trio f0iiewrn9 date- <br /> Air Velocsry►— 1496.2 � FIV <br /> D <br /> where Pveavelo[Itr pressure ,n Fncnes of wetor <br /> 0 a,Arr density in Z/cu t7 <br /> Air Densrryr— 1 315 a <br /> weer* Ps fM Aoromeme Presa#re in incites of mercury <br /> 7—Absohne iernoeratwe I,narcarra fempairanrre -F <br /> plus 460) <br /> Flow on cu h per nen. ve Duet area in aquae feet A err vetocrt7r in it <br /> per "IM <br /> AIR VELOCITY STAINLESS STEEL <br /> CALCULAYOR PITOT TUBES <br /> C'nMouNs ..IK.rt �/aN Tamar aMw�/ YArFr CY <br /> w rr aawarr�. wwsstad aNlerw#err I.Iwww amok..;#•eswa.n«a •r vewesrr . srrwpM rat Ira.301 a#w.+. <br /> rf . - move ono Naaarre. SIMM" ' lima a#wi.$wew Misr• <br /> noted r a r.w r r <br /> Ns c of e w mored• awardarar so .w. <br /> S. <br /> t�NM4 Rwerr .01 aarsiaw far rrevar So w <br /> i L�o ti 10 .r.w Mrwartiwr+ <br /> r' ;y w dw to 20.000 rpm SH1111 C war I►M ft %46 <br /> I�3MRAE seMa.i.ems#ana. <br /> +� rvrorrMM vires era fors# _ S.rioa 12' 60 ' laws. <br /> ria. Mawr at fart raaarrw t <br />