rec.pyro Caduceus Rocket -- Awarkard and Uncertain
- From: Mr_Emous@xxxxxxxxxx
- Date: Mon, 26 Nov 2007 12:48:20 -0800 (PST)
The Family Magazine
Redfield & Lindsay 1838
Caduceus rockets, in rising, form two spiral lines from their being
placed obliquely one
opposite the other, and their counterpoise in their centre, which
causes them to rise in a
vertical direction. Rockets for this purpose must have their ends
choked close without
either head or report, for a weight at top would be a great
obstruction to their mounting.
Honorary rockets are the same as sky-rockets, except that they carry
no head nor
report, but are closed at the top, on which is fixed a cone. On the
case, close to the top
of the stick, tie on a two ounce case, about five or six inches long,
filled with a strong
charge, and pinched close at both ends ; then in the reverse sides, at
each end, bore a
hole similar to those in tourbillons ; from each hole carry a leader
into the top of the
rocket. When the rocket is fired, and arrived at its proper height, it
will give fire to the
case at top, which will cause both rocket and stick to revolve very
fast in their descent,
and represent a worm of fire descending to the ground.
There is another method "of placing the small case, which is by
letting the stick rise a
little above the top of the rocket, and tying the case to it so as to
rest on the rocket :
these rockets have no cones. A third mode of constructing them is as
follows ; In the
top of a rocket fix a piece of wood, in which drive a small iron
spindle ; then make a
hole in the middle of the small case, through which put the spindle ;
then fix on the top
of it a nut to keep the case from falling off; when this is done the
case will revolve
rapidly without the rocket.
The Edinburg Encyclopaedia 1830
The Caduceus rocket, as it is called, consists of two rockets fixed to
one stick. For this
purpose Fig- 6. the rockets must have no heads, as they are unable,
from the great
resistance which they offer to the air, to carry any unnecessary
weight. To enable them
to ascend, it is prudent not to place them at a greater angle to each
other than 40 or 45
degrees ; and, indeed, the less the angle is, so much the more certain
and steady will
their flight be. At the upper extremity, they must be fastened, the
one before, and the
other behind the stick. At the lower, they are to be attached to a
transverse bar, which
is also fastened upon the stick, so as to form an equilateral
triangle. But it is to be
observed that they must not lie in one plane ; and this object is
effected by passing the
lower extremities on the alternate sides of the transverse bar, in
directions the reverse
of that which they have at the upper extremity. Thus, the tendency of
each rocket
becomes such as to compel them to turn in a spiral round the line of
flight, forming that
particular appearance whence the name is derived. The stick is
required to be
considerably longer than for simple rockets, and the centre of
equilibrium of the whole
should be at least one length of a rocket from the vents. In firing
them, it is necessary
to be careful that they light together, and great care is required in
the suspension. With
all these precautions, the performance of this compound rocket is
awkward and
uncertain.
The cabinet of arts, or, General instructor in arts, science, trade
.... and ...
Hewson Clarke, John Dougall
1817
Caduceus Rockets, in rising, form too spiral lines, or double worm, by
reason of their
being placed obliquely, one opposite the other ; and their
counterpoise in their centre,
which causes them to rise in a vertical direction. Rockets for this
purpose must have
their ends choaked close, without either head or bounce, for a weight
at top would be a
great obstruction to their mounting ; though I have known them
sometimes to be
bounced, but then they did not rise so high as those that were not ;
nor do any
caduceus rockets ascend so high as single, because of their serpentine
motion, and
likewise the resistance of air, which is much greater than two rockets
of the same size
would meet with if fired singly.
For fixing these rockets the sticks must have all their sides alike,
which sides should be
equal to the breadth of a stick proper for a skyrocket of the same
weight as those you
intend to use, and to taper downwards as usual, long enough to balance
them, one
length of a rocket from the cross stick ; which must be placed from
the large stick 6
diameters of one of the rockets, and its length 7 diameters ; so that
each rocket, when
tied on, may form with the large stick an angle of 60 degrees. In
tying on the rockets,
place their heads on the opposite sides of the cross stick, and their
ends on the
opposite sides of the long stick ; then carry a leader from the mouth
of one into that of
the other.
When these rockets are to be fired, suspend them between two hooks or
nails, then
burn the leader through the middle, and both will take fire at the
same time. Rockets of
1 Ib. are a good size for this use. Caduceus Rockets, in rising, form
two spiral lines, or
double worm, by reason of their being placed obliquely, one opposite
the other ; and
their counterpoise in their centre, which causes them to rise in a
vertical direction.
Rockets for this purpose must have their ends choaked close, without
either head or
bounce, for a weight at top would be a great obstruction to their
mounting ; though I
have known them sometimes to be bounced, but then they did not rise so
high as those
that were not ; nor do any caduceus rockets ascend so high as single,
because of their
serpentine motion, and likewise the resistance of air, which is much
greater than two
rockets of the same size would meet with if fired singly.
The Pyrotechnist's Companion: Or, A Familiar System of Recreative
Fireworks
G.W.Mortimer
1852
Caduceus* Rockets.
If two rockets be fixed obliquely on the opposite sides of a rod, they
will form in their
flight two spiral lines; they must exactly balance each other on the
opposite side of the
rod, or they will not rise in. a vertical direction. Both ends of the
rockets must be choked
close, without either head or bounce, for a weight attached to them
would obstruct their
ascent.
The rod proper for these rockets should be square, and at the top
equal to the breadth
of a rod for a common single rocket, of the same weight as those
intended to be used,
and long enough to be in equilibrium, when suspended one length of the
rocket from
the cross- piece, whose length should be equal to about seven
diameters of the rocket,
and placed about six diameters from the top of the large rod, so that
when fixed they
will form, with the perpendiculars, an angle of about fifty- five or
sixty degrees. Fig. 23.
[A picture being worth a 1 000 words ? see figure.]
The heads of the rockets should be placed on the opposite sides of the
cross-piece,
and their ends on the same of the large rod; then their mouths must be
connected by a
leader, which, when they arc fired, must be burned through the middle,
and then they
will exert their ascending forces at the same time.
* So called from their resemblance (when in action) to the rod borne
by Mercury; which,
according to fabulous history was entwisted by two serpents, as the
sign and quality of
his office, which was given him for his seven-stringed harp.-?The term
(or Caduce)
was also used among the Romans, and applied to the staff or wand of a
similar form,
carried by those officers who went to proclaim peace with any people
with whom they
had been at variance.
Artificial fireworks
Robert Jones
1776 & 1901 Eds.
Caduceus Rockets,
In rising, form 2 spiral lines, or double worm, by reason of their
being enclosed
obliquely, one opposite the other, and their counterpoise in their
centre, which causes
them to rife in a vertical direction. Rockets for this purpose must
have their ends
choaked close, without either head or bounce; for a weight at top
would be a great
obstruction to their mounting; though I have known them sometimes to
be bounced, but
then they did not rife so high as those that were not; nor do any
Caduceus rockets
ascend so high as single, because of their serpentine motion, and
likewise the
resistance of air, which is much greater than 2 rockets of the fame
size would meet
with, if fired singly.
By Fig. 33. you fee the method of fixing these rockets : the sticks
for this purpose must
have all their fides equal, which fides should be equal to the breath
of a stick
proper for a sky rocket of the same weight as those you intend to use,
and to taper
downwards as usual, long enough to balance them, 1 length of a rocket,
from the
cross stick which must be placed from the large sick, 6 diameters of 1
of the rockets,
and its length 7 diameters; so that each rocket, when tied on, may
form with the large
stick an angle of 60 degrees. In tying on the rockets, place their
heads on the opposite
sides of the cross stick, and their ends on the opposite fides of the
long stick; then
carry a leader from the mouth of one into that of the other. When the
rockets are to be
fired, suspend them between two hooks or nails, then burn the leader
through the
middle, and both will take fire at the fame time. Rockets of 1 Ib. are
a good size for this
use.
.
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