PML Close Proximity Recovery CPR FAQ
Contents
1. ve combined them in all combinations In all cases the parts will NOT fit if no baby powder is used With baby powder applied as per the CPR instructions provided with your CPR Based kit or CPR RetroFit Kit all parts fit perfectly seal well and slide smoothly MISCELLANEOUS CPR CUSTOMER QUESTIONS INFORMATION e Some customers have asked if the altimeter vent hole should be drilled through the airframe only as our instructions tell you or through the altimeter tube as well The hole only needs to go through the airframe The air passes through the airframe hole works its way around the circumference of the altimeter tube and enters the altimeter bay through the large slot in the altimeter tube Also keeping 03 07 15 2 7 PMLCloseProximityRecoveryCPRFAQ doc the AF vent hole on the opposite side of the slot as the instructions direct provides a buffer against tiny spikes in the airflow for better altimeter operation Another question has been why is the drogue section of the rocket on the bottom and the main chute section on the top This is one of those questions where once you understand WHY you will never forget the answer Deploying the drogue from the nose could jerk the rocket enough to pull apart the lower section and deploy the main Deploying the drogue from the middle doesn t jerk the nose away from the chute compartment PML recommends that the fore and aft altimeter O rings be used for only two flights then thrown aw2. PMLCloseProximityRecoveryCPRFAQ doc PML CLOSE PROXIMITY RECOVERY CPR FAQ CPR Close Proximity Recovery PML exclusive system which deploys a small drogue chute at apogee to allow the rocket to descend quickly but stable with the main chute s deploying at a user selectable altitude AGL above ground level IMPORTANT NOTE TO HELP PREVENT BLOWBY DAMAGE Through testing we ve determined that customer complaints of black powder blowby is attributable in nearly every case to improper incomplete prep of the charge cylinders In all CPR prep instructions there is a step usually Step C that states Push a small wad of tissue into the hole using a pointed object This will seal the hole and keep the black powder from leaking out In our tests we ve determined that not performing this step completely is the 1 cause of BP blowby The wad of tissue referenced must be packed tight and must fill the hole completely Please take additional care in the future to check and recheck yourself on this important step If our prep instructions are followed carefully and completely there is very little chance of any significant blowby CPR3000 What is CPR e CPR is an altimeter based two step parachute deployment system Using a dual deployment altimeter the first chute a small drogue is deployed at apogee allowing for a fast but controlled descent At a user selectable approximately 200 400 600 or 800 feet refers to PML Co
3. Pilot altimeter the altimeter fires a second charge deploying the main chute allowing for a soft landing e The altimeter is centrally located in a special compartment within the main airframe The drogue chute is ejected from a split point in the airframe just above the fin motor section while the main is ejected at the nose cone Both chutes are deployed using our exclusive Piston Ejection System e Once assembled the altimeter charge cylinder assembly can be easily moved to another CPR3000 rocket making it easy and cost effective since you only need one altimeter to fly CPR3000 e CPR 2 1 and 2 6 come with a 12 streamer cut to desired length instead of an 18 drogue chute which comes with larger sizes The chute is too large for these small diameters e ACPR based rocket must always be flown with the electronics installed A CPR based rocket cannot be flown with motor based ejection This is because the fin section coupler bulkplate assembly and the lower drogue piston block off the motor section from the rest of the rocket 03 07 15 1 7 PMLCloseProximityRecoveryCPRFAQ doc e PML offers both CPR Equipped kits and CPR Retrofit Kits for converting an existing PML kit or scratchbuild rocket for CPR See the CPR Systems page in our webstore for details including a graphic showing what modifications are required to use CPR with many of our kits What is CPR3000 e The most complete Close Proximity Recovery System ever No
4. ay and replaced with new O rings This will help ensure good sealing of the altimeter bay and protection of the altimeter from pressure spikes and black powder residue We offer a 12 pack 6 fore 6 aft O rings on the CPR3000 page of the webstore under part number CPR3K OR PK One set of fore and aft altimeter O rings is provided with the CPR3000 system initially whether a CPR based full rocket kit or a CPR Retrofit kit for scratchbuild use I ordered the charge cylinder for flash bulbs but the flash bulb is very loose inside the charge cylinder Put a tissue packing around the flashbulb Roll a small tissue square preferably Estes wadding since it s flameproof about 1 5 x 1 5 into a tooth pick shape then form it into a ring and use a small screwdriver to pack it around the bulb once installed Kind of like a tissue donut with the flashbulb in the hole of the donut CPR3000 and Hybrids Using CPR3000 with a hybrid based rocket is usually impractical due to the excessive length that needs to be added to the rocket CPR3000 requires nearly 3 feet to be added to a hybrid based rocket effectively putting it out of bounds for use with hybrid rockets This is certainly true of PML s hybrid ready kits CPR3000 Component Weights The following lists approximate weights in ounces for CPR3000 parts for use in RockSim or other simulation programs 03 07 15 Aluminum Threaded Airframe Coupler 1 7 Aluminum Threaded Airframe Slee
5. design or through offering CPR compatible mounts for their products BlackSky AltAcc Adapter Modifying AltAcc to work with CPR3000 PML now sells a BlackSky ALTACC adapter to fit all ALTACC models up to and including the 2C the CPR3K ALTACC ADPTR which is available on the CPR Systems Page of the PML website If you have any questions about using the ALTACC with CPR3000 contact BlackSky If you have an older ALTACC with a green board 1 16 has to be sanded off each end of the board for the CPR3K ALTACC ADPTR brackets to fit Prior to the availability of the adapter some customers modified the CPR3000 mounts to fit the ALTACC The following information about modifying the mounts for ALTACC is from a PML customer We can neither confirm nor deny that it works but provide it to you here for your reference I called and talked to Scott at Blacksky and he stated that all you had to do was cut or file four notches in the edge of the circuit board were the screws for the CPR mounting would engage and hold the altimeter in place The copilot altimeter has holes in the circuit board but the AltAcc has 2 metal standoffs that normally hold it to the body tube I took a triangular file and made 4 small notches to hold the altimeter to the CPR module The Alt Acc uses a jumper to turn the unit on amp off The system is normally armed by closing a screw on the circuit board again via another hole in the airframe and the status of the unit
6. ery systems and equipment Note Regarding CPR3000 and Altimeter Manufacturers Some customers have asked why we chose to select the PML Co Pilot and Transolve P6 as the standard altimeters that fit CPR3000 and the Transolve P4 or P5 Adept ALTS 25 and BlackSky ALTACC altimeters with our optional additional cost adapters First we believe very strongly in supporting our customers PML has sold hundreds of CPR2000 kits that use the Transolve P4 or P5 or Adept ALTS 25 altimeter and many of those altimeters to go with the kits as well We want our current customers to have complete compatibility immediately It makes sense for us and for them to use an altimeter they re already familiar with and is interchangeable between their current CPR2000 rockets and any CPR3000 systems they may choose to buy Second the better question might be How come the altimeter manufacturers don t make theirs fit CPR We re the only company that offers a standardized ready out of the box dual deployment system and we have over a thousand of these systems in the hands of rocketeers so it would make sense for the altimeter manufacturer to make their product fit the rocketry system that s most likely to use their product wouldn t it In our opinion it would make sense for the altimeter manufacturers to base their designs around fitting CPR and the scratchbuilders not using CPR can design mounting schemes for their altimeters as they always have We re in the rocke
7. frame tubing to be added to use the CPR MAX system which would change their appearance so substantially that PML does not recommend CPR MAX for these kits e The information below is intended as a guide for determining the proper amount of ejection powder used with various diameter CPR MAX rockets using a piston ejection system and a 24 fore or aft recovery airframe o 6 0 diameter 1 0 to 1 3 grams o 7 5 diameter 1 2 to 1 5 grams CPR MAX Component Weights The following lists approximate weights in ounces for CPR MAX parts for use in RockSim or other simulation programs This does NOT include the weight of the pistons KwikLinks or piston straps only the core components of the CPR MAX system The weight is for one part so if more than one is used be sure to multiply the weight by the quantity of parts COMPONENT QTY 6 0 7 5 CT 6 0 1 10 75 15 75 CT 6 0x8 1 6 9 10 2 03 07 15 4 7 PMLCloseProximityRecoveryCPRFAQ doc CT 6 0x1 5 2 1 3 1 9 PT 6 0x2 1 1 5 2 3 Aluminum Threaded Airframe Coupler 2 1 7 1 7 Aluminum Threaded Airframe Sleeve 2 0 6 0 6 PT 1 5x10 2 1 7 E7 Birch Bulkheads Mounting Plates 2 3 65 3 95 Charge Caps Vinyl 4 0 05 0 05 Charge Holder 4 0 4 0 4 Charge Cylinder Ematches 4 0 4 0 4 Fore Altimeter Mount 2 0 6 0 6 Aft Altimeter Mount 2 0 3 0 3 Switch 6 screws 4 alt 2 sw amp wiring 2 0 2 0 2 O Rings 6 0 05 0 05 CPR2000 e CPR2000 is designed to use the Tra
8. is determined by looking at a LED on the circuit board via a hole in the airframe I went a couple of steps further and wired the jumper block on off jumper tothe CPR switch mounted on the body tube This allows the AltAcc to be armed without accessing the altimeter directly I also drilled another hole in the altimeter bay so I could view the LED indicator to determine the status of the altimeter 03 07 15 1 7
9. need to purchase separate ejection systems external safety switch or drogue chute Also includes a 16 page fully illustrated comprehensive assembly and user manual These systems are perfect for retro fitting into your existing rockets or for incorporating into your new designs Here s what you get e Complete altimeter bay assembly e Complete Threaded Airframe Coupler assembly made from 6061 aluminum with a blue anodized finish e All mounting hardware for the PML Co Pilot or Transolve P6 altimeter Mounts for Transolve P4 P5 Adept ALTS 25 and BlackSky ALTACC altimeters sold separately e Two complete ejection systems including charge canisters and holders Designed for E matches Charge cylinders for flash bulbs sold separately One set of fore and aft altimeter O rings provided whether a CPR based full rocket kit or a CPR Retrofit kit for scratchbuild use Dual piston systems Drogue chute or streamer with tubular nylon shock cord External safety switch and lead wires 16 page fully illustrated comprehensive assembly and user manual See the CPR Systems page in our webstore for graphics and details IMPORTANT NOTE ON ALTIMETER FIT IN ALTIMETER BAY We ve gotten reports of customers sometimes having difficulty getting the altimeter with O rings fitted to slide into the altimeter bay properly We ve tested the fit of the CPR o rings in the altimeter tube using both latest batches and older batches of parts We
10. nsolve P4 or P5 altimeter or the Adept ALTS25 We do not currently offer adapters to use electronics from other manufacturers e CPR2000 components are still available on our webstore for customers who may own CPR2000 kits and need replacement parts Differences in Mounts for CPR2000 and CPR3000 The mounts for the CPR3000 for Co Pilot and P5 or P6 are just more robust Basically the areas where the holes are located are thicker If you tried to mount a Co Pilot to a 2000 mount not only would the holes not line up but also there s more room than needed to clear the parts on the altimeter On the other hand if you tried to mount an ALTS2 to a 3000 mount the holes would not line up and there would be interference between the mount and components on the altimeter PML Co Pilot Altimeter for CPR3000 See the Electronics page of our webstore for more details on each device and other devices that may not be covered here 03 07 15 5 7 PMLCloseProximityRecoveryCPRFAQ doc PML currently carries the PML Co Pilot altimeter The Co Pilot altimeter was developed exclusively for Public Missiles Ltd by Missile Works Corp and was designed specifically for PML s CPR3000 Recovery System though it can also be used in other applications as well such as scratch built deployment systems The Co Pilot is based upon Missile Works RRC altimeter The Co Pilot provides two stage barometrically controlled pressure sensing deployment of rocket recov
11. t business not the altimeter business so we leave the altimeter issues to those that make them Third as you know there are many different sizes and shapes of altimeters available and it simply wouldn t be cost effective for us to produce all the altimeter mounts to fit each and every altimeter someone might like to use since we d sell very few of any particular adapter not enough to offset the tooling cost of the adapter It makes much more sense for the altimeter manufacturers to either a offer a version of their product ready made to fit CPR systems or b make altimeter mounts to fit CPR and sell them to promote use of their altimeters It s in their best interests to do either a or b to sell more of their altimeters and to support their customer base as we are with making CPR3000 compatible with what our customers already own Our CPR3000 altimeter bay is already designed in anticipation of altimeter manufacturers picking up the ball by designing it long enough and wide enough to accommodate any altimeter on the market at the time of it s introduction BlackSky has done so by making an adapter available for their ALTACC line of altimeters which we now sell as well 03 07 15 6 7 PMLCloseProximityRecoveryCPRFAQ doc So to summarize we strongly believe in supporting our previous customers and would expect that the altimeter manufacturers can and should do the same by making their products work with CPR either through the base
12. ve 0 6 Charge Holder 0 4 Charge Cylinder Ematches 0 4 Charge Cylinder Flashbulbs 0 6 Fore Altimeter Mount 0 6 Aft Altimeter Mount 0 3 3 7 PMLCloseProximityRecoveryCPRFAQ doc Switch 6 screws 4 alt 2 sw amp wiring 0 2 3 O Rings 0 05 CPR MAX CPR MAX CPR3000 for Large Diameter Rockets e Our CPR system has been available in 2 1 through 3 9 diameter sizes for years Our new CPR MAX system was developed for 6 and 7 5 rockets This system allows for redundant recovery system deployment for the purpose of safety and to protect your investment If you ve always wanted to add CPR3000 style recovery to your 6 0 or 7 5 inch kit CPR MAX is the answer e The CPR MAX system uses the same components as the CPR3000 system but in a special design configured for large diameter 6 and 7 5 inch airframes CPR MAX also features twin altimeter design which can be used either as the backup required for Level 3 flights or as a safety backup for regular sport flying NOTE CPR MAX does not REQUIRE the use of two altimeters It can safely and effectively be flown with only one The second altimeter is a redundancy feature not a requirement e The CPR MAX System contains nearly everything you need altimeters epoxy ejection powder and additional airframes if required not included to convert your existing rocket or as an enhancement to your own design e The Bulldog AGM 600 and Pterodactyl kits would require over 2 feet of air
Download Pdf Manuals
Related Search