The QUICKIE Steam Rockets

                           QUICKIE I
   These steam rockets were designed with a smaller, lighter base to be set up
fast to show what a steam rocket is and how they work.  The rocket is fully
prepared for launching on the base so that when the time comes, it can be
carried to the launching site on the field, the torch lit and then when the
pressure is right, the launch cord is pulled.
The QUICKIE I launch base.
   Far right is the splash guard over the battery and switch for the chute-
ejection fuse ignitor.  The ignitor's leads are yellow.  Launch cord is on the
launch lever.  White string taped to the lever goes back to the fuse-ignition
switch.  The base inverts easily for seating the nozzle plug into the nozzle.
There is a positive stop for how far the nozzle plug goes up into the rocket.
The QUICKIE I steam tank, nozzle and fins unit.
   The hook at the bottom is for the guide rod and the wire U up at the hose
clamp is the upper guide.  The chute cable attaches down at the hold plate and
the chute shrouds clip onto the cable loop at the top.
The inner parts.
   On top of the tank is a pad made of aluminum foil to protect the chute-
eject charge from the heat of the tank.  Taped to the pad will be the chute
charge, 1/4 tsp of black powder in a masking tape pouch.  The other end of the
3 & 1/4" fuse has an ignitor and fuse primer for lighting the fuse.
   Next is the baking-tin chute cup which goes over the chute charge. The
coffee bag is taped to the cup bottom-to-bottom and protects the chute from
scorching.  This yellow chute is 40" which proved to be too big.
Launch video of QUICKIE I.
   The rocket arced over at the top from misalignment of the nozzle after the
tank was distorted by the unusually high thrust.  This problem was corrected.
                          QUICKIE II
   Because throw-away propane tanks will eventually rust through, QUICKIEII
was designed.  A new tank just has to have the nozzle throat drilled out to
1/2" and the pressure-relief valve needs to be sanded down to bare metal and
a brass piece silver-soldered over it.
The QUICKIE II motor/fins parts.
   The nozzle cone/fins unit is now simply screwed onto a new tank.  The brass
threaded part for the unit was salvaged from a fitting used to refill throw-
away propane tanks from a 20-lb tank.  The fitting is silver-brazed to the
old exit cone, hold plate and fin mounts unit.
   The 1/8" ply fins shown above were ripped off during one launch and have
been replaced with heavy aluminum ones attached with stainless pop rivets.
Launch of QUICKIE II.
   The launch rod is 8 feet long.  The distance travelled between the first
two frames is 5/16" on a frame-printout page which is an actual distance of
1.66 ft. in 1/30 of a second or 50 FPS, 34 MPH.  In the next two frames 3.33
ft. is 100 FPS or 68 MPH.  Then 4.33 ft. is 88 MPH.  Then 5.66 ft. is 116 MPH.
Then 6.66 ft. is 136 MPH.  Finally 7.3 ft. is 150 MPH.  Accelerations are from
45 g's to 18 g's.   Time to get up to 150 MPH was 1/5 second.
Last frame with QUICKIE II in view.
                          QUICKIE III
The body parts for QUICKIEIII.
   The body is a 4" wide, 6" high tin can.  The chute-protection coffee bag is
4" high. Two muffin tins masking-taped bottom-to-bottom form a chute piston.
The nose cone is a light foam ball.
Body and tank hose clamps and one of three straps.
   The 1/4-tsp chute-ejection black powder charge is in a masking tape pouch
and the fuse is outside the body can through a 1/8" hole.
The tip of the red pyro fuse (arrow).
   Masking tape with a hole in it is put down over the end of the fuse which
was cut at an angle to expose the black powder to the fuse primer.  The primer
glues the fuse powder to the ignitor tip.
Tape keeps ignitor wires from shorting on the can.
  "OK" means the ignitor is good.  Fuse primer is made of 1/8 tsp black powder
and an amount of corn starch the size of a popcorn kernel.  Mix the two in a
jigger, add one or two drops of water off your fingertip until it's a thick
paste.  While it's sticky, use a toothpick to put it between the ignitor tip
and the fuse tip so that it also sticks to the masking tape.  Cover with
masking tape the next day after it's dry.
Fuse primer between fuse and ignitor.
   Enough is used here to make a visible smoke puff to show fuse ignition
before launching the rocket.  The ignitor leads are connected, then ignitor
plus ignitor-to-clips continuity is tested.  Never assume that old spring
clips make good contact with the ignitor!
Triple-hose-clamp thrust brace.
   Three hose clamps have their tighteners spaced equally and these are seated
against the fin mount arms for bracing against the high thrust.  When the
chute is deployed, the rocket hangs with the body can down to absorb the
impact instead of landing on the fins.
The complete QUICKIE III.
   QUICKIE III had a good high flight, but the video camera batteries failed.
                         QUICKIE IV
   This is a lighter rocket than III.  The body is the same tin can. The parts
inside the body can and the nose cone are the same.
The nozzle/fins/hold plate unit.
   The hold plate is welded to the tank like QUICKIE I to keep the weight low.
   The arrow shows the fuse hole.
The  QUICKIE IV launch.
   In the first interval between frames the rocket is going 48 feet per second
(FPS) or 33 MPH, then 96 FPS or 65 MPH, then 134 FPS or 92 MPH, then 173 FPS
or 118 MPH, then 202 FPS or 138 MPH and finally 230 FPS or 157 MPH.  The
accelerations were 44 g, 35 g, 35 g, 26 g and 26 g.  Total time for these six
frames is 1/5 second.