DIY! How to Make Your Own. Trip Line Detonator for Use With Big Blast Target InflatorÔ

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1 IMPORTANT To ensure the templates print the correct size make certain that Scale or Scaling in your PDF printing program is set to Off or None. Trip Line Detonator for Use With Big Blast Target InflatorÔ Big Blast Target InflatorÔ trademark is owned by Umarex USA DIY! How to Make Your Own Made specifically for use with Big Blast Target InflatorÔ

2 How to modify a Rat Trap for use as a pressurized Cola bottle detonator SAFETY There is no inherent danger in building this device just keep in mind that smart people get hurt when doing stupid things. Pay attention, work smart and be safe. Use gloves, eye protection and hearing protection when handling pressurized bottles!! Cover the bottle with a heavy bath towel or rug while inflating. If any part of the bottle turns milky white or frosty looking while inflating Discard that bottle, it s defective!! Be certain that the Big Blast bottle cap is tied to something to ensure that it isn t driven by the blast into anything or anyone that can be damaged or injured. KEEP CHILDREN AWAY!! Trip Line Detonator for Use With Big Blast Target InflatorÔ Big Blast Target InflatorÔ trademark is owned by Umarex USA Tie Strap Holes (For Bottle Mounting) Page 2 Mounting Holes (Template on Page 10)

3 Designed for use with Big Blast Target InflatorÔ which is found in most sporting goods stores The intended usage of this device is to snap a firing pin into a high pressure bottle causing a deafening blast when the trip line is hit Very useful for keeping deer... prowlers and zombies away. WARNING: Do Not use indoors or in confined spaces as the extreme db noise level may cause hearing damage!! Please understand that we are showing the way we built the device and you may see a better way of doing it. In addition to the simplicity of the design you ll notice that absolute accuracy is not required. Getting close is good enough. The secret to making it work is to defeat the sensitivity of the tripping mechanism. This is done by using a twine leader a rubber band and a little slack in the twine as shown on page 7. The drawings are actual size and can be cut out and used as templates. (Pages 11 & 12) Why we ve chosen to use the Victor Metal Pedal Rat Trap Model #M201 (or Model M210) It s the only trap we ve found with a easily removed trigger. Simple to take off and get out of the way while we re drilling the holes and it reinstalls just as easy. Tools: Forstner Bits make nice clean holes but hole saws and spade bits can also be used. Sizes required: 1/4,, 1-1/4 A #12 Firing Pin screw requires a 5/32 bit. No size is specified for the mounting holes (Page 10) use what fits your screws. The only other tools needed are a sharp chisel or knife to remove material around 2 holes, a pair of wire cutters for trimming the tie straps, a small screwdriver to remove the trigger, needle nose pliers to re-install the trigger, and a spring clamp. You ll also need a saw to cut out the Firing Pin Adapter blanks. Material required: Plywood 3/16 (5mm) 2-1/4 x 4 inches. We re using 3/16 in. x 4 ft. x 4 ft. Multi-Purpose Project Panel Tri-PLY from Home Depot Model # It s moisture resistant but must be dipped in a water proofer like Thompson's to protect it. Rubber band 3-1/2"L x 1/4"W, #64 (same thing post office uses) Masons line or sturdy twine for the leader and another 6 feet to secure the Big Blast cap. S hook A tiny Carabiner Hook makes attachment of the Trip Line to the trigger leader easy. Fishing line 8 lb test for trip line. 8 lb line is plenty strong enough to operate the trap and will break before doing any serious damage to the trigger. Sheet Metal Screw for firing pin (Pan head #12 x 1-1/4 ) The length is critical longer or shorter will not work. Tie Straps 11", 50 lbs, cheap at Harbor Freight Page 3

4 Firing Pin Adapter (not shown) will be Tie Strapped to the Hammer Hammer Spring Arm Bar TRIGGER BASE Terms Used Let s Build one! There are 3 Secrets to making this thing work: A Rubber Band, Slack in the Trigger leader and a properly positioned Firing Pin. And all 3 will be disclosed in the following pages!! STEP 1 Remove the Trigger so it doesn t interfere with the hole drilling... Place screwdriver in slot and twist to widen the slot. Lift trigger out. STEP 2 Print templates found on Page 11. Tape Template to Trap and mark hole locations with Punch or Awl Page 4

5 STEP 3 Remove template and drill holes. Remember to drill the hole before the 1-1/4 hole. Remove excess to dashed lines with chisel. STEP 4 Install Reinforcement to end of trap base. This step is optional but highly recommended as we ve found that some trap bases break the first time they re used. Cut a strip of wood 9/16" square by 3-1/4" long. Glue and screw as shown. STEP 5 Slot the trigger back in and bend the tab back up so it stays put. Page 5

6 STEP 6 Tape Template to the Firing Pin Adapter blank. Plywood 3/16 (5mm) 2-1/4 x 4 inches. Find templates on Page 12. This part is the most easily damaged therefore making 2 or more pieces is recommended. STEP 7 Mark Hole Centers, Remove template and drill holes, Shape to lines with chisel. Mark this part with a X or the word UP to make certain it s installed the right side up. When done dip the part in Thomson s Water Seal or boiled linseed oil to waterproof. Trip line (Normally 8lb fishing line -- masons twine shown in this example) Trigger Leader BIG SECRET reveled on next page!! STEP 8 Cut about a foot of twine for the Trigger leader and tie one end to a S hook. The optional Carabiner is tied to the Trip line and clipped to the S hook. The carabiner makes disconnecting the trip line easy. Second thoughts forget the S hook and just tie a loop in the end of the Leader. Page 6

7 Putting things together The SECRET to making this thing work starts here - It s the rubber band and slack in the twine! Without this slack a bird landing on the trip line would set it off. Mark 2-1/2 inches from knot on rubber band. STEP 9 Trigger Leader -One end has a S Hook or a loop tied on it- Tie the other end of the to the rubber band as shown. Leave a good 4-6 inches of the twine free at the end. Measure 2-1/2 inches from the knot and mark the twine, insert this mark in the trigger crimp. STEP 10 The end of the Trigger Leader is crimped to the trigger with 2-1/2" slack in the line. The twine doesn t have to be crimped tight, just enough drag to pull the trigger The Leader slack provides a buffer that allows movement of the trip line without setting off the trap. This slack prevents premature operation of trigger and you will adjust it to optimum. Hammer Firing Pin STEP 11 Don t tie a knot in the end of the twine because if the trip line is hit hard or fast the knot will prevent the line slipping out of the trigger causing damage to it. Melt the end of the twine to prevent unraveling. Page 7 STEP 12 Install the Firing Pin and then strap the Adapter onto the trap Hammer. Notice that the Firing Pin Adapter is installed under the Hammer and the tie strap clasps are at the top. If this Adapter is installed Wrong Side up the trap will not set.

8 STEP 13 Install bottle. The bottle can be installed on the work bench or after the detonator has been mounted to post or tree. Do Not use heavy duty tie straps, (less chance of breaking the trap) two 11 inch 50 pound straps on each side will do fine. When working at the workbench put around 50 psi of air in the bottle, and snug up the tie straps just enough to hold bottle in place, Not Tight because the bottle will swell when pumped up. After installing inflate to psi. When working outside the bottle will probably have to be installed at full pressure. STEP 14 Mount on tree Requires a 2x4 bracket as shown to hold the bottle clear of the tree. TREE Trip Line TREE Notice that the detonator and adapter have to be mounted on the other side of the tree. STEP 15 Mount on post Protect the bottle from the firing pin with a piece of thin wood while you re installing the mounting screws. Page 8 STEP 16 Install the trip line and clamp the trap open while you double check slack in the Trigger leader. The trip line must be allowed movement without setting off the trap. If your trip line is long or tight you may need to use a 2nd rubber band.

9 IMPORTANT The bottle cap must be secured to prevent its loss and to make certain that it isn t driven by the blast into anything or anyone that can be damaged or injured. Tie it to something using at least 6 feet of Masons twine. STEP 17 Pull gently on the Trip Line while observing the slack in the Trigger Leader. Just enough slack to set off the trap without undue force on the rubber bands. Adjust as necessary. STEP 18 Remove the spring clamp and set the trap as below: THIS SIDE UP Arm Bar Traps are meant to sit on the floor and cannot be set Firing Pin when horizontal unless there is something to support the Arm Bar. This is done here by laying the Bar across the Firing Pin and it won t work any other way. Make certain the trap is mounted the right side up!! Page 9

10 Your choice of size and location.v V What it looks like when assembled Parts shown in installed position Firing Pin Adapter Firing Pin Hole 0 1/2" These 3 holes are used for mounting... Your choice of size and location. 2" Cut this out and use to mark mounting hole locations 0 1/2" 1 5/8" RAT TRAP VICTOR This SIDE Mounts UP 2.75" Page 10 Layout of mounting holes shown above

11 RAT TRAP 1/4 1-1/4 1/4 Drill 2nd These areas to be removed with knife or chisel Drill this Hole 1st RAT TRAP 1/4 1-1/4 1/4 Drill 2nd These areas to be removed with knife or chisel Drill this Hole 1st RAT TRAP RAT TRAP 1/4 1-1/4 1/4 Drill 2nd These areas to be removed with knife or chisel Drill this Hole 1st RAT TRAP 1/4 1-1/4 1/4 Drill 2nd These areas to be removed with knife or chisel Drill this Hole 1st RAT TRAP 1/4 1-1/4 1/4 1/4 1-1/4 1/4 Drill 2nd These areas to be removed with knife or chisel Drill 2nd These areas to be removed with knife or chisel Drill this Hole 1st Drill this Hole 1st TRAP MULITPLE TEMPLATES Page 11

12 FIRING PIN ADAPTER, MULTIPLE TEMPLATES Page 12