User Manual and Instructions Model WRC² Wireless
Contents
1. P O Box 171 10 prewired AG 1 bulbs in cardboard Reusable aluminum charge holder 10 Elkhart IN 46515 tubes 1 gram measuring cup end caps prewired AG 1 bulbs 1 gram measuring 219 679 4143 and mandrel cup end caps and mandrel There are several methods for constructing your own ejection charges First you ll need to acquire some black powder locally It is recommended that you use FFFF 4F grade however FFF 3F powder can be used Another commercially available powder is called Pyrodex which should not be substituted for black powder The following formula represents a general rule of thumb for calculating the required amount of black powder for a given airframe Factors such as a tight fitting nose cone or coupler as well as a tight fitting parachute or streamer can affect the performance of an ejection charge It s always better to have a little extra black powder as not enough could possibly result in deployment failure Black Powder grams Compartment Diameter inches X Compartment Diameter inches X Compartment Length inches X 006 Unless you ve got a reloading scale the easiest method to measure black powder is to purchase a set of black powder measuring cups from your local firearms dealer Quick and Easy Ejection Charge One easy method for constructing charges is to use aluminum foil and some masking tape Start with a small square of aluminum foil about 4 to 5 square Form a small thimble by molding the fo2. Next tamp in a small piece of tissue paper then seal the canister by melting some candle wax over the tissue Be careful with the open flame of the candle around the black powder After firing the charge the wire leads and bulb match remains can be removed and the canister reloaded for another use A convenient means of holding these charge canisters is to use a 1 2 CPVC end cap with a small hole drilled along the bottom for the wire leads Fasten the end cap securely on a bulkhead surface with a screw Place a few wraps of masking tape around the outside of the canister pull the wire leads through the hole and you ll get a very snug fit in the CPVC end cap Reusable ejection charge system Black powder Flashbulb or e match Wire leads Hole for wire leads Tissue wax plug Dowel slice with hole Glue or Silicone seal CPVC end cap Launch Day Now that you have methodically designed and built your rocket and its recovery system it s time to fly There s usually lots of activity on a launch day with other fliers and other rocket flights It s best to prepare your rocket carefully and not to bypass any critical steps The following list is a guideline of the necessary steps you should take in the preparation of your WRC At the prep table Load test the battery Check continuity and resistance of the ejection charges Mount and secure the electronics in the payload section Make final wiring connections to the electronics Prepare and pa
3. User Manual and Instructions Model WRC2 Wireless Remote Control Overview The WRC Wireless Remote Control System provides two independent high current FET outputs for hobby rocketry remote control applications The most common applications of remote control are redundant recovery system deployment or for aerial staging however the unit is suitable for triggering any type of user controlled event The RF communications operate using a 900MHz spread spectrum transmitter in conjunction with a broad band receiver The communications also employ highly secure digitally encoded data packets which provide reliable interference free operation of the unit This encoding also prevents the need for impounding transmitter units while at an organized launch Specifications Receiver Specifications Transmitter Dimensions 5 5 L x 3 25 W x 1 H Dimensions 6 Lx3 Wx2 H Weight 2 8 OZ Weight 6 8 oz Electrical 11 14 VDC 40ma nominal Electrical 3 VDC DL123A Lithium battery Frequency 902 928 MHz Frequency 902 928 MHz frequency hopping Environment 32 120 deg F 95 RH Environment 32 120 deg F 95 RH AN Handling Precaution These units are sensitive to damage from ESD electro static discharge and should always be handled in a properly grounded environment ESD damage is not covered under your warranty Transmitter Operation It is recommended that you first install the battery to activate the transmitter Remove the top cover of the transmit
4. ck the recovery components parachutes wadding Assemble the rocket and check all deployment coupling junctions ensuring a snug and adequate fit Arm the electronics and verify ejection charge continuity Disarm the electronics prepare and load the rocket motor At the Pad e Place the rocket on the launch rod or rail Insert the igniter in your rocket motor Verify continuity of the motor igniter if possible Arm the electronics and re verify ejection charge continuity Snap a few photos then RELISH IN THE CULMINATION OF ALL YOUR WORK AND PREPARATION Product Warranty Missile Works Corporation has exercised reasonable care in the design and manufacture of this product and warrants the original purchaser that the WRC Wireless Remote Control System is free of defects and that will operate at a satisfactory level of performance for a period of one year from the original date of purchase If the system fails to operate as specified then return the unit or units within the warranty period for repair or replacement at our discretion The system must be returned by the original purchaser and be free of modification or any other physical damage which renders the system inoperable Upon repair of replacement of the unit Missile Works Corporation will return the unit postage paid to the original purchaser Product Disclaimer and Limit of Liability Because the use and application of this equipment are beyond our control the purchaser or user agr
5. commercially available e matches It has also been successfully tested and flown with AG 1 flashbulbs and custom made 003 nichrome bridgewire ejection charges This however is a just a small sampling compared to what is commercially available Refer to Table 1 for commercial e match suppliers for the WRC2 Table 1 Recommended E match suppliers Daveyfire Inc OXRAL Inc Luna Tech 7311 Greenhaven Dr Suite 100 PO Box 160 Sacramento CA 95831 3572 Owens Cross Roads AL 35763 Tel 916 391 2674 Tel 205 725 4226 Fax 916 391 2783 Fax 205 725 4811 Model Resistance Test Current Firing Current Wire Color Daveyfire 28B 1 6 0 3 ohms 20 ma 0 020 amp max 370 ma 0 37 amps min Daveyfire 28BR 1 6 0 3 ohms 20 ma 0 020 amp max 370 ma 0 37 amps min Daveyfire 28F 1 6 0 3 ohms 20 ma 0 020 amp max 1 00 amp min 25 ma 0 025 amp max 500 ma 0 5 amp min Red Blue Ejection charges The ejection charge consists of a small quantity of black powder which when ignited produces enough gas pressure to expel the recovery system from the body of the rocket You can either make your own ejection charges or purchase commercially available ejection charge systems Robby s Rockets provides two ejection charge systems one single use the other a reloadable system Refer to Table 2 for more information Table 2 Commercial Ejection Charge suppliers Robby s Rockets Disposable Ejection Charges L E S Kits Loadable Ejection System
6. ees to hold harmless Missile Works Corporation and their agents from any and all claims demands actions debts liabilities judgements costs and attorney fees arising out of claimed on account of or in any manner predicated upon loss or damage to property of or injuries to or the death of any and all persons arising out of the use this equipment Due to the nature of electronic devices the application and environments for those devices the possibility of failure can never be totally ruled out It is the responsibility of the purchaser or user of this equipment to properly test and simulate the actual conditions under which the device is intended to be used to ensure the highest degree of reliability and success Rules to live and fly by 1 Before you use the WRC Remote Control System make sure you have read and understand all the instructions operations and warnings contained herein 2 Do not alter the system in any way as this voids the warranty and could render the system inoperable or unreliable 3 Always fly within the guidelines established by either the National Association of Rocketry or the Tripoli Rocketry Association whenever you participate in hobby rocketry activities MISSILE WORKS P O Box 740714 Arvada CO 80006 0714 CORPORATION Tel 303 426 1462 Fax 303 426 1428 On the World Wide Web www missileworks com Copyright 1998 99 by Missile Works Corporation All rights reserved
7. il over your index finger Next measure in the necessary amount of black powder Insert your e match or flashbulb into the black powder IMPORTANT Be sure that the leads to the flashbulb or e match are COMPLETELY INSULATED otherwise the leads could short out on the foil causing the charge to fail Finish the charge by compressing the remainder of the foil around the black powder and e match flash bulb Seal the end with a wrap or two of masking tape Reusable ejection charge system Another method is to construct a set of reusable canisters from 1 2 launch lug tubing and 1 2 wooden dowel First cut a small length of launch lug tubing The length of the tubing will depend on the amount of black powder necessary and what you re using to ignite it A flashbulb requires much more real estate than an e match After properly sizing the tubing take the 1 2 dowel and cut a thin slice about 1 8 thick off the end Take this slice of dowel and epoxy it into one end of your tubing When the epoxy has cured drill a small hole through the slice of dowel The hole diameter will depend on the size of the wire leads you ll be using The canister is now complete Place the flashbulb or e match into the canister pulling the wire leads through the small hole Seal this hole with a hot glue gun or silicone Fill the canister with the necessary amount of black powder Gently tamp the black powder against the bulb or e match with a small length of the 1 2 dowel
8. n the transmitter Channel 2 is the secondary channel and provides a latched continuous output when the Ch 2 pushbutton is pressed The latching can be reset by pressing the Latch Reset Switch or simply powering off the receiver In addition the channel 2 output provides an additional out of range function The receiver and transmitter conduct a regular dialog during operation When the receiver is operating and it has not received a valid signal from the transmitter for 60 minutes it will energize the channel 2 output This feature can be used to activate a homing device or other event if the rocket and receiver unit drift away from the launch area beyond the range of transmitter As long as the receiver is in range of the active transmitter unit the channel 2 output will be operate via pushbutton The line of sight range of the transmitter is 2 miles so if you are using the out of range feature it s best to remove the battery from the transmitter to ensure the operation of this feature The receiver also features an audible continuity verification feature When both output channels have good continuity the receiver will beep 2 times When just one of the channels have continuity then only one beep is heard And of course when there is no continuity there is no beeping of the receiver unit Receiver Transmitter Testing and Operation The receiver unit can be tested by observing the diagnostic LED s on the RF board located beneath the to
9. p interface board assembly With the receiver power source connected and NO connections on the respective output terminals press the channel 1 or channel 2 switch on the transmitter The 1 or 2 LED s on the RF board will illuminate depending on which switch was pressed Important Always press and hold the transmitter pushbuttons to ensure the complete transmission of a data There is a slight delay in the communications as the transmitter sends several redundant data packets Data packets are sent for each ON and OFF transition of the pushbutton For maximum data throughput and response when triggering two events very closely together it is advised to PRESS AND HOLD the first event pushbutton then press and hold the second pushbutton as required by your application This will prevent the OFF message data packets from being sent which subsequently will increase the event response time Always be sure to press the reset button after testing the channel 2 output to reset the latch Do not connect a live igniter or pyro charge to the channel 2 output that is latched on Wiring and Battery Considerations Ordinarily the receiver power source is used to supply the voltage current to the igniters e matches or pyro charges The receiver electronics use high power current sinking MosFETs capable to 12 amps per output There is no current limiting on these outputs and they will sink as much current as the output load requires In situations where a high o
10. ter housing and insert the battery as shown noting the polarity of the battery positive towards top negative towards bottom Transmitter Unit Assembly Reset Button Antenna on top of transmitter Note the Battery DL123A Transmitter PC Board Orientation After the battery has been inserted press the Reset Button on the transmitter board This ensures the restoration of the transmitter ID code from the unit s non volatile memory It is also advised that the battery be checked for adequate voltage level under load Using a DMM connect the meter leads to the battery and depress either of the front panel switches The battery should maintain its 3 volt level If the battery dips below 2 9 volts or lower it is a good indication that the battery needs to be replaced Lithium cells have a sharp degeneration curve and the voltage dip indicates a bad battery IMPORTANT Do not operate the unit with a low voltage transmitter battery as this might cause faulty operation Always use a fresh battery and load test the transmitter battery prior to use The transmitter is now ready for use Replace the front cover When operations with the unit are finished you can remove the battery to increase its useful service life Receiver Operation The Receiver unit has two remote control channels each having a distinct function Channel 1 is the primary remote control channel and provides a follower type operation it follows the Ch 1 pushbutton o
11. testing circuitry Important When arming the unit ALWAYS turn on the RECEIVER POWER FIRST followed by the IGNITER POWER SWITCH Failure to arm the unit in this sequence may fire an igniter Isolated Battery Wiring Diagram External User Igniter 1 Supplied Switch Receiver Power Receiver Battery Igniter 2 11 14 VDC External User Supplied Switch Igniter Power Output Load Battery 6 14 VDC E matches and Ejection Charges The topic of e matches and ejection charges is often overlooked and not given a proper evaluation The ejection charge is as critical a component as the electronics Improper selection or application of e matches can result in failure of the recovery system and total loss of the rocket The following text will make some very specific recommendations which you should seriously consider when selecting constructing and ultimately flying with electronic deployment systems Important Always ground test the type of e match or igniter you ll be using under actual flight conditions prior to committing to flight Improper selection of an e match or igniter will result in a malfunction Always use an e match or igniter that is suited for the firing conditions of the WRC unit Always check your e match igniter or flash bulb devices for continuity and proper resistance prior to using them under testing or actual flight conditions Selecting an adequate E match The WRC has been tested and flown with several
12. utput current load is required it s recommended to use separate isolated receiver power and output load power battery systems This will ensure the receiver battery power source will maintain adequate voltage during the firing of high current outputs Receiver Board Assembly Channel 1 Output Squib 1 External User Supplied Switch Channel 2 Output Squib 2 Battery Input 11 14 VDC Latch Reset Button TX Programming Button Factory Only Important If the output load draws excessive current from the receiver battery system during firing this condition could drop the receiver battery voltage to a level below which it can operate reliably Always adequately size your battery system for adequate load handling capacity and ground test the system prior to committing to flight conditions Isolated Output Load Battery and Receiver Battery Wiring Isolated Battery wiring is recommended only for high current output load applications To wire isolated power for the output loads connect the plus lead of the output load battery system through an external switch to one side of the igniter or e match and the other lead of the igniter or e match to the terminal of the channel 1 or channel 2 output terminals Connect the negative lead of the output load battery to the negative terminal of the receiver battery input Ensure the Output Load Battery voltage is at least 1 2 the Receiver battery voltage so it can operate the continuity
Download Pdf Manuals
Related Search