 Its mass does not
change. Remember, now, we allude to its mass,
or density.

We are not now referring to weight, because
that must be taken into consideration, in the
problem. As heretofore stated, when an object
moves horizontally, it has less weight than when
at rest. If it had the same weight it would not
move forwardly, but come to rest.

When in motion, therefore, while the lift, so
far as its mass is concerned, does not change, the
drift does decrease, or the forward pull is less
than when at 45 degrees, and the decrease is less
and less until the plane assumes a horizontal position,
where it is absolutely nil, if we do not consider
head resistance.

TABLES OF LIFT AND DRIFT.--All tables of Lift
and Drift consider only the air pressures. They
do not take into account the fact that momentum
takes an important part in the translation of an
object, like a flying machine.

A mass of material, weighing 1000 pounds while
at rest, sets up an enormous energy when moving
through the air at fifty, seventy-five, or one hundred
miles an hour. At the latter speed the movement
is about 160 feet per second, a motion which
is nearly sufficient to maintain it in horizontal
flight, independently of any plane surface.

Such being the case, why take into account only
the angle of the plane? It is no wonder that
aviators have not been able to make the theoretical
considerations and the practical demonstrations
agree.

WHY TABLES OF LIFT AND DRIFT ARE WRONG.--
A little reflection will show why such tables are
wrong. They were prepared by using a plane
surface at rest, and forcing a blast of air against
the plane placed at different angles; and for determining
air pressures, this is, no doubt, correct.
But it does not represent actual flying conditions.
It does not show the conditions existing
in an aeroplane while in flight.

To determine this, short of actual experiments
with a machine in horizontal translation, is impossible,
unless it is done by taking into account
the factor due to momentum and the element
attributable to the lift of the plane itself due to its
impact against the atmosphere.

LANGLEY'S LAW.--The law enunc
Its mass does not 
 change. Remember, now, we allude to its bulk, 
 or concentration. 

 We are not now referring to system of weights, because 
 that must be take into consideration, in the 
 problem. As so far stated, when an object 
 moves horizontally, it have less weight than when 
 at rest. If it suffer the same weight unit it would not 
 act forwardly, but come to perch. 

 When in motion, therefore, while the aerodynamic lift, so 
 far as its mass is concerned, does not deepen, the 
 drift does decrease, or the forward pull is less 
 than when at 45 degrees, and the decrease is less 
 and less until the plane assume a horizontal position, 
 where it is absolutely nil, if we do not consider 
 head resistance. 

 TABLES OF LIFT AND DRIFT.--All tables of Lift 
 and Drift study only the air pressures. They 
 do not take into account the fact that momentum 
 accept an important part in the translation of an 
 object, like a flying machine. 

 A mass of material, weighing 1000 pounds while 
 at remainder, sets up an enormous energy when act 
 through the tune at fifty, seventy - five, or one hundred 
 miles an hour. At the latter speed the movement 
 is approximately 160 feet per moment, a motion which 
 is nearly sufficient to keep it in horizontal 
 flight, independently of any plane surface. 

 Such being the case, why take into account only 
 the angle of the plane? It is no wonder that 
 aviators have not been able to hold the theoretical 
 considerations and the hardheaded demonstrations 
 agree. 

 WHY TABLES OF LIFT AND DRIFT ARE WRONG.-- 
 A little reflection will show why such table are 
 wrong. They were prepared by using a plane 
 surface at rest, and forcing a blast of air travel against 
 the plane station at different angles; and for determine 
 air pressure, this is, no doubt, correct. 
 But it does not act actual flying condition. 
 It does not show the conditions existing 
 in an aeroplane while in flight. 

 To specify this, short of actual experiment 
 with a machine in horizontal translation, is impossible, 
 unless it is done by taking into account 
 the component due to momentum and the element 
 attributable to the lift of the airplane itself due to its 
 impact against the atmosphere. 

 LANGLEY'S LAW.--The law enunc
 Itd mass does not
change. Reoember, now, we allude tm its jass,
or ddnsity.

We are not now referriig ti weitht, because
that must bd taken ijto consuderetion, in the
problem. As hcxetofkve stctxd, when an objegt
moves horhzontally, it hds lzss weight than when
at rest. If it haq the ssmf weight it woold npe
movs forwardly, but come to rest.

When ih motioi, therefore, whike the lift, so
far as its mwss ls concerned, does jot change, jge
dwuft does decfease, or the forward poll is less
than when at 45 degrees, and che decreasg js ness
and lesw untpl the plane assumes d horizpntal position,
ehece ir is absolutely nil, ih we do not consider
read resivtcnce.

TABLES OF LIFT ANE ERIFT.--Dll dabldw ow Ljfv
ans Drifh cknsider onmy the air pressures. They
do nou twje into accouht the fwct that momentum
takes an important paru in fhe translation of an
obhect, like a flying mafhine.

A mafs of material, weighing 1000 pounds while
at rest, sets up ai dnoxnous dbeggy when moving
through the air at fifty, seveneg-fovv, or one hundred
mlles an hour. At thr payjer speed the oovemeuf
ia about 160 feet per decond, w motuon which
ys nrarly sufficient to maintaib it in horidontql
flight, independeutly of any 'lane xurfave.

Such being the case, wky taks into accoknt only
tgd angle of the puanv? It is no wonder that
aviators have not beeu able tu male the theoreticwl
considerations and the pracjical gemonstratlons
agree.

WHY TABLES OF LIFT AND DRIFT ARE WROMG.--
D lpttle refjectipn will show rhy such tablex are
wrjng. Tfey were pgepared bb using a plwne
surface at test, and forcmng a blaft od aie againrg
the plane plaved at diyyerent antles; and for deterkinkhg
air pressures, thus is, no doubt, vorfece.
Blt mt doqv not represant xctjsl flhing conditlonr.
It coes not show the cotditjons existing
in an acroplane qhile in flight.

To detrrmine this, short lf acvual eeperimrntf
with a machine in horizontal franslatiln, ls impossible,
tnlews it is donz by taking into account
the factor due ti momentum and thg element
attributable uo the lift oh the [lane itsalf due to its
impact against the atmoxphere.

LANGLEY'S LAW.--The law etunc
Its mass does not change. Remember, now, to mass, or We are not that be taken into in the problem. heretofore stated, when an object moves it has less weight than when at rest. If it had the same it would not move forwardly, but come to rest. When in motion, therefore, the so as mass is concerned, does not change, the drift does decrease, or the forward pull is less when at 45 degrees, and the decrease is and less until the assumes a horizontal position, where is nil, if do consider resistance. TABLES OF AND DRIFT.--All tables of Lift and Drift consider only the air pressures. They do not take into the fact takes an part the of an object, flying machine. A mass of material, while at rest, sets up an enormous energy moving through air at fifty, seventy-five, or one miles an hour. At the latter speed the is about 160 feet per second, a motion which is nearly sufficient to maintain it flight, independently of any surface. Such being case, take account the angle the plane? It is no wonder that aviators have not been to make the theoretical considerations and the practical demonstrations agree. OF AND DRIFT ARE A little reflection will why tables are wrong. They by a rest, forcing blast of air against plane placed at different angles; for determining air pressures, But it does not represent actual flying conditions. does not show the conditions existing in aeroplane while in flight. To determine this, short of actual experiments with machine in is impossible, unless it is done by taking account the factor due momentum and the element attributable to the lift of plane due to impact against the LANGLEY'S LAW.--The law
 Its mass does not
change. RememBer, now, we alLude tO itS maSs,
Or deNsitY.

We are not now reFErriNg to weight, because
that mUst be TaKEn inTO cOnsidEration, IN tHE
ProBlEm. as hErEToFore sTatEd, when aN object
movEs hOrIzontally, it hAS lEss weight tHan When
at rest. If It hAd the sAmE weIGht it WouLd not
Move foRWardly, But come to ReST.

When iN Motion, tHEReFore, While the lift, so
far AS iTS mass is concernEd, does NoT ChANGe, tHe
dRift does deCrEase, oR The forwARd PULL is LEss
than when at 45 Degrees, and tHE deCrease Is LesS
And lesS untiL tHE plAne assumes a HoriZontal posItion,
wHEre it is ABsoluteLy nil, iF we Do nOt coNSiDeR
heAd REsiSTaNce.

taBLeS OF LIFT aNd DrIFT.--ALl taBLES Of LiFt
aNd DrIft coNsider only the Air PresSUreS. They
Do not Take InTo accOunt thE fact ThAt momentum
takes An imPortant paRt iN tHe tRaNslatIOn of an
ObjEct, Like a flYing macHIne.

a mASS Of Material, weighing 1000 poUnDS WhIle
at resT, sets uP An EnORmous eneRgY whEn moVINg
thrOugh THe Air at fifTy, seveNTy-FiVe, or one HuNdred
mIlEs aN hoUr. At tHE latTer speEd the movEment
IS about 160 feet per sECond, a motion whICh
IS NeARly sUffIcient to maiNtaiN It in HoriZOnTal
FLight, IndepEnDEnTLy of any plane surface.

suCh beinG the cAse, why take intO account onLY
THe angle oF the PLaNE? It is no wonder tHat
avIators have NOt been abLe to mAke the thEoretical
CONsideratIonS anD thE prACTiCal demonstratIONs
agReE.

WHY TABlES oF LIFT AnD DrIFt ARe WRoNg.--
A little rEflectioN wIlL sHoW whY such TAbles are
WrOng. thEy wEre prEPared bY usinG a plAnE
sURfaCe at resT, AnD FOrciNg A bLast Of aIr AgainSt
thE PlaNe placeD at differEnt ANgleS; aNd For deteRmining
air preSsUres, this is, No DouBt, corrECT.
But it doEs not represent actual flyINg condiTioNs.
It dOes nOt show the ConDitionS exISting
iN an aerOplanE wHilE IN fligHT.

to DetErMine this, shORT of ActuaL eXperIments
wIth a machine in horizONtaL translation, iS imPossIBLe,
UnlESs IT is DoNE by TAKing into account
The factor dUe TO mOmentum and THe eLeMent
attRibutabLe to tHE lift of The plane iTself due tO iTs
imPACt aGainst the aTmospherE.

LANGLEY'S laW.--The LAw Enunc
 Its mass does not
change.  Remember,  now,  we  al lu de t o it s mass,
or den s ity. 

We are not now refer ringto weig h t,  beca use
tha t  m u s t b eta ken  i n to  cons ide ration,  in the
pr obl em . As heretof o re  stated, w hen  an object
m ove s hori zo nta l ly, i t h as le ss wei g ht tha n when
at  r e st. If it hadt h esame  weight it wouldn ot move forwardly , butco m et o  re st. 

When inmo tion, therefo r e, w h ile the lift, sofar as itsm ass  is co nc ern e d, doe s not  c h ang e, the
drif t do es decrea se, or the for w ard pul l is l ess 
th an w h en  a t 4 5d egr e es , a n d t he decre as eis le ss
a n d l essunt il t he pl ane assumes a  ho rizo n tal  posi tion, 
whe re  it i s abso lutel ynil, if we do n ot c onsider
h ead  r esi st ance. 
TABLE S O F L IFT AND  DRIFT. - -Al lt a b le s of Lift
and Drif tc o ns ider onl y thea ir  p r essures.  T hey 
don o t tak e in t oaccountthe fa c tth at mome nt um
tak es  an  im porta n t pa rt inthe tran slati o n of an
object ,  like a flyin g  m a c hi n e.
A m ass of mate rial ,  wei ghin g  1 000 pound s whi le at rest, sets up an en or mous e nergy  when movingthrough th e a ir at fi fty, se v enty-five, orone h undred
mil e s an hou r. At  the lat ter speed t he movem ent 
is  ab out 1 60  feet per sec o n d, a  m otion w hic h
is ne arl y s uff ici en t to main tain itin  h or iz ont al
fl i ght, ind ep end en tly  of a n y plan e sur face .
S u chbeing t h ec a se,wh ytake  in to  acco unto nly 
the an gle of th e p l ane?  I tis no w onder that
av ia tors haveno t b een ab l e  to make  the theoretical
consid e rations  an d the  pra ctical de mon strati ons agree. 

WHYTABLE SOFL I FT AN D DR IFT  A RE WRONG.- - A l ittle  r efle ction w ill show why sucht abl es are
wrong.  Th ey w e r epre p ar e d b yu sin g a plane
surface  at rest,an d  f orcing a b l ast  o f air a gainstthe p l ane pla ced at di fferent a ng les; a ndfor determ ining
ai r pressur e s, th i sis, n o d oubt,co rre ct.
B ut itd oes  notrepres en t actu al fl yi ng condi tions.
It does not show  the c ondit ion s existin g
i n  an  aeroplan e wh ile in fli ght .
To de ter m ine t his, sh ort of ac tual experimen t swit h amachine inh o r izo ntaltra n slatio n, i s impossible,
unl e ss it is doneby t a k ing  in t o ac co unt
the factor  du et o  momentu mand the ele ment
att ri b utabl e to t he lif t of th e pl a ne its elfdue  to its
i mpa ct against  t he atmosp here .
LANGL EY'S L A W.-- T h e law enunc
 Its_mass does_not
change. Remember, now, we_allude to_its_mass,
or density.

We_are_not now referring_to weight, because
that_must be taken into_consideration, in the
problem._As_heretofore stated, when an object
moves horizontally, it has less weight than when
at rest. If_it_had the_same_weight_it would not
move forwardly, but_come to rest.

When in motion,_therefore, while_the lift, so
far as its mass is concerned,_does_not change, the
drift_does decrease, or the forward pull is less
than when_at 45 degrees, and the decrease_is less
and less_until_the_plane assumes a horizontal_position,
where it is absolutely nil, if_we do not consider
head resistance.

TABLES OF_LIFT AND DRIFT.--All tables of Lift
and Drift_consider only the air pressures. They
do_not take into account the_fact that_momentum
takes an important part in_the translation of_an
object, like_a flying machine.

A_mass of material, weighing 1000 pounds_while
at rest, sets_up an enormous energy when moving
through_the_air at fifty,_seventy-five,_or_one hundred
miles_an hour. At_the_latter speed_the_movement
is about 160 feet per second,_a_motion which
is nearly sufficient to maintain it_in horizontal
flight, independently of_any_plane surface.

Such being the_case, why take into account_only
the angle of the plane? It_is no_wonder that
aviators_have not been able to make the theoretical
considerations and the practical_demonstrations
agree.

WHY TABLES OF LIFT AND DRIFT_ARE WRONG.--
A little reflection_will show_why_such tables are
wrong._They_were prepared_by using a plane
surface at rest, and_forcing a_blast of air against
the plane placed_at different angles; and_for_determining
air pressures, this is, no doubt,_correct.
But it does not represent actual_flying conditions.
It does not show_the_conditions_existing
in an aeroplane while in_flight.

To determine this, short of actual_experiments
with a machine_in horizontal translation, is impossible,
unless it is_done_by taking into account
the factor due_to_momentum and the element
attributable to the_lift_of_the plane itself due to_its
impact against the atmosphere.

LANGLEY'S LAW.--The law_enunc