The sun. [volume] (New York [N.Y.]) 1833-1916, 1898-07-03

walk aft again, clutching the rope for safety
and bending from the spray. never saw tho
express. as tho water seems now to be rushing
by. The smokestack Is tossing. up chunks Of
coral corn IN Pop dsP?tp Mr.. t Poqsons!s Iin1 sGm sbr FiSR6s
the glimmering heat, becomes the head of a
queer GuS ]l sNIsndfG STIin t T1 na.1 big So, fo%n fo. eyes bs.
tween them. Are we really travelling forty
miles an hour over the sea; or ts this some
through blinuing drifts, or are we shooting the
WHIRLPOOL Rapids at forty miles an hour on q
Once more 1 stand at the heart of tho ship
where Mt. Parsons Is; this Is the focus for all
the sound aboard, the ,hG GrS Pw Of T, the }So 6iSG ab the ne
Turblnia. Mr.. Parsons back Is turned, bis
~vention. What must his feelings he to think, II
he has time to think, that since tho ocean was
%.Sd as n" he man Is w msi MT0G noW. u f6en ~ | Su rehsc ton on
h%eredity: his father, Lord Rose. built the great
telescope named after him: his brother. the
There is virtue in good bloodl u.
1t is simple enough, what he has to do Just
now: If the boiler pressure falls below 225, open
into the stoke holes; il the pressure goes above
225, shut Off the forced draught. II he wants
to go full speed, turn that big brass wheel until
the g%o-ahead valve is wide open; II he wants
to AK r. to S iSs Scotsman ssmG 'o or t YSts engine ne room Mnn there re
arc the tubes. II, he-hellO, what's he up 10
n9wi Slowing down; yes, that means two
officer opening tho stoke-hole covers, and poor
devils Of stokers coming up to gasp; ..o., I.
going TO reverse her as soon as she drops to
twelve knots.
steam gauge. and forthwith, with busy elbows,
shuts off steam from the go-ahead turbines and
op,Sens the valve OF tHe reyehr sr tSr3IHs, In
she is making about fifteen miles an hour. There
Is NO sign. however. that anything special has
well-trained horse when the rein Is drawn, and
then, without jar or disturbance, save for a
rushing forward of the wave behind, begins to
back. And for several minutes she continues to
back, working mp to her maximum reversal
speed of ten knots an hour; n.u =, ~. ..,o, l..
over. We, have run out beyond Newbiggcn
Point nearly twenty miles, and We steam back
slowly ut "A twenty-four.knOt pace.
On the day following the run MIR. Parsons
took me through the works at HeAton, where
like the Tur6inia, hut 10 operate machinery 0!
all kinds. And Hooked inside these motors and
tSsy 1 rSn. 0sTf FL and1 ssfSini FR%hPii s prinG GP |h t%G
points must be considered. The trst is, that a
shaft may be made TO turn inside an iron steam
chest il blades are fixed upon the surface of the
shaft so that the steam rushing through will
press against them just as the wind pressel
against tho blades Of a windmill;
The second point is. that as the steam eKertl
It's power IL expands continually, and 30 has less
and less force for turning as II moves SIOaG The
tho leverage a small force may be made TO over
f TnsSef 9Gs Il i1 tRs 5 Bfsiss'G on t rs a .h Larger are i @"d,
longer and longer as they GO, from end TO end
the expanding steam may still exert a uniform
effort in turning the shaft. And this is exactly
what Is done In tho turbine engine; the shaft il
made to carry three collars OF increasing diam
eter; each collar bearing ON its surface hundred
OF the little windmill blades shown In the &C
companying Illustration. These collars are ~
placed that the steam, when II enters the tuT
bino at its greatest pressure. strikes tn
shortest blades hrst; then, when it ha
passed part way through the turbln,
and lost q portion Of its energy, II strikes
larger set of blades. which offer q greater lever
leaving the steam chest, when 1t has expanded
still further, II strikos the largest set Of blades
which Oner The greatest leverage OF all, the rC
suit being that the shRIt receives a unlfOrn
rotary pressure Throughout Its whole length Il