Home

Issue #362 - Apogee Components

1. APOGEE COMPONENTS POP NISTSSUE JEG OU Noo ror DUAlWCPIOYMent s GoverPnotom ne Aerotecinstrong Arm rocketsakitsbeing readied forJaunch Get your OWN ati QUR IIWWW ApogeerocKEerSICOMIROCKET KitSISKil Leyens NitSIStrongEArm e SA LA As m oo ea 2 Y i ai Apogee Components Inc Your Source For Rocket Supplies That Will Take You To The Peak of Flight 3355 Fillmore Ridge Heights Colorado Springs Colorado 80907 9024 USA www ApogeeRockets com e mail orders apogeerockets com Phone 719 535 9335 Fax 719 534 9050 ISSUE 362 APRIL 8 2014 AT P gt K h O What Do You Need For Dual Deployment By Tim Van Milligan A common question that we get at Apogee Compo nents is What do need to get started in dual deploy ment It is such a common question that we revised the home page of our web site to point people to the answer also thought I d write about it here in this article so inter ested people have more information to make informed choices To start it is necessary to give an overview of what dual deployment is And this is simple dual deployment is a method of limiting the walking distance you have to do in order to retrieve your rocket after a flight It is mainly used for high power rockets or those that fly extremely high greater than 3000 feet But I m seeing a trend that people want to use the technology in smaller rockets too can t think of a s
2. We re Paying Cash For Great Articles for This Newsletter Are you a writer looking for some serious pocket change We re paying up to 350 for good how to articles for this newsletter If you re interested see our submission guidelines on the Apogee web site www ApogeeRockets com Newsletter Newsletter_Guidelines ISSUE 362 APRIL 8 2014 Page 9 jae F EEE Aidi P E E NMa ranan ah cami a Di CHT Poo A T i Continued from page 9 What Do You Need For Dual Deployment ting into a body tube the sections of the rocket can slide apart too easily The shear pins prevent this The larger the diameter of the rocket or the higher it goes the greater the force My rule of thumb is that shear pins should be used on rockets that are greater than 4 inches in diameter 2 56 Tap and Drill Set If you do use our shear pins then this tap and drill set will allow you to make the right size holes in the rocket parts Note that this tap and drill set is included in our Mounting Hardware Kit But if you want to get it sepa rately see Parachute Protector This is the reusable alternative to recovery wadding It is placed in the rocket between the ejection charge and the parachute and is attached to the shock cord so that it stays with the rocket and can be reused We have several sizes available on our web site at Nomex Shock Cord Protector If you are using a shock cord that is not flame resi
3. Components web site Rail buttons replace launch lugs and allow the rockets to be used on longer and stiffer launch rails instead of rods www ApogeeRockets com Building__ Supplies Launch_Lugs_Rail_Buttons Rail_ Buttons Epoxy Used for rocket construction and making fin fillets to improve the durability of the rocket We have a couple of different types of epoxy For more information see www O p Petia Always Ready f Rocketry wio gt s sjox OYIobhody Page 11 Continued from page 11 ApogeeRockets com Building Supplies Adhesives Additional resources Modern High Power Rocketry 2 great reference for high power rocketry It also covers the subject of dual de See www ApogeeRockets com Rocket_Books_Videos Books Modern_High_Power_Rocketry_ 2 Videos Are you looking for a step by step process of building a dual deployment kit On our web site we have instructions for the Level 2 rocket kit The videos are free to watch on YouTube and you can find them at www ApogeeRockets com Advanced_Construction_Videos All The videos start with video 101 and run through video 122 You ll see most of the products mentioned here in this article and how to specifically use them and set up a dual deployment rocket See also Peak of Flight Newsletter 324 which covers frequently asked questions about dual deployment www pdf What Do You Need For Dual Deployment ployment as well as
4. do use those types of switches make sure they are mounted sideways so that they can t be switched on off by the rocket taking off At Apogee Components we sell three different types of power switches Push Switch This is a simple and inexpensive on off switch for your electronics This is the one that comes with our electronics mounting hardware kit The switch is typically mounted completely inside of the rocket and it is activated by pushing a dowel through a hole in the side of the rocket to to reach the switch See www ApogeeRockets com Electronics_Payloads Electronics_Accessories Simple_ Switch Rotary Switch For people that like to have the switch on the outside of the rocket this switch lets them use a screw driver as a key to turn the switch into the on off positions See www ApogeeRockets com index php main_page product_supplies _ info amp cPath 52_ 159 amp products_id 71 Push Hold Switch For the most streamlined rocket this special switch allows you to have just metal Battery battery connector mounting board and igniter are not incuded ISSUE 362 APRIL 8 2014 ea p a a i T Rotary Switch contacts terminals on the outside of the rocket To turn the electronics on off you can just use a piece of metal to short across the ter minals To make sure Figure 5 The rotary that it isn t accidental switch ly turned on off such as bumping the rocket against the metal launch rail t
5. more complex At Apogee Components we offer several different manufac turers www ApogeeRockets com Electronics_Payloads i a Page 3 ja EE AKT PET F E d On OF Push Switch week commenter Allows Sadie pull at HUE Hoae Vo ramase uke Figure 2 The Altimeter mounted in the E bay So selecting one can be confusing for first time buyers Some dual deployment altimeters have extra sensors which means they have more bells and whistles and extra capability If you are just looking for the bare bones dual deployment system you can filter out these high end systems In fact recommend that to first time dual deploy ment customers Not only does it save costs but it reduces the complexity of the system thereby making it easier to set up for flight Those high end altimeters have a purpose but you don t need to get the top end system for your first flight And don t worry about having multiple systems in your inventory of electronics you ll need it later When you work your way up to a Level 3 size rocket you are required to have redundant electronics in your rocket and they can t be of the same type So you ll can use your bare bones altimeter that you get initially as the back up system when you eventually fly the L 3 rocket OF WE nare A A SHT A me all __ a e al Continued from page 3 3 What Do You Need For Dual Deployment o m E a from for a bare b
6. then remount them correctly without having to buy additional items And having a large diameter rocket means you can stick your hands inside the rocket to hook up connectors and move wiring around easily If you re just starting out in dual deployment I d highly recommend starting with a 4 inch diameter rocket for this reason alone Additionally there is also a lot more room for your recovery devices which helps reliability in ejecting them out of the rocket they don t have to be packed so tight While 4 inch diam eter rockets are more expensive and require larger rocket engines you ll find that the frustration factor is greatly reduced and you ll get your rocket into the air a lot quicker That gets us to the next item that you ll need Ebay If the rocket kit you select doesn t come with one you will need to order or make an Ebay to hold all of your elec tronics All of the Ebays that we sell currently at Apogee Com ponents www ApogeeRockets com Electronics_ Payloads Electronic_Bays are specifically designed to hold the elec tronics for a dual deployment rocket If it says Ebay you can assume that the product contains a mounting board for the altimeter and the necessary hardware to secure that board into the rocket If the rocket comes with a payload bay you ll still need Continued on page 4 Experienced HPR Builders Use uos kite o itmineieas Sheer Fre om Ganie thee o M ctias nulla AeroPacksiFl
7. Dual deployment rockets are designed to come apart in sec tions But during flight the rocket has to stay together This is where removable rivets come in handy Instead of using heavy screws and nuts to hold the sections of the rocket together we have small plastic rivets that do the same thing but are easier to use The are a two part system that can be reused because they are easily removable www ApogeeRockets com Building_Sup plies Misc _ Hardware Removable_Plastic_Rivets Figure 8 Removable rivets Shear pins Shear pins are different from the rivets The shear pins are used to temporarily hold the rocket together until the ejection charge goes off They simply break in half when the ejection charge goes off allowing the rocket to sepa rate and deploy the main parachute What they really do is to prevent premature separation of the rocket parts until the ejection charge goes off Premature separation can occur because of the pressure difference of the air on the inside of the rocket compared to the atmospheric pressure On the ground the internal pressure 5 and the external pressure are the same But as the rocket ascends skyward the atmospheric pres sure decreases with altitude That means that the pressure inside is greater than the outside air and there is a net force trying to pop open the rocket With just a friction fit of the parts such as a coupler fit gt sere Figure 9 Nylon Shear pins
8. Recovery_Equipment Parachute_Deployment_Bags Quick Links Large parachutes are harder to attach to rockets because it is harder to pass the rocket body through the loops on the suspen sion lines This is were quick links come in handy They are like a link of a chain that can be opened by unscrewing a little nut on it Then it is fas tened to the parachute and the shock cord so they are fastened together It makes it easy to move the parachute from one kit to another More information at www ApogeeRockets com Building_Supplies Parachutes_Recovery_Equipment Quick_Links Figure 11 Quick links Continued on page 12 on page 12 ISSUE 362 APRIL 8 2014 JNO N Apogee Ror DIA OISU Pli ABO dy y Tubes Blue_Tubes aun LEE EED Errereerrere Tender Descender This is a tether release device that allows you to turn an ordinary high power rocket kit into a dual deployment rocket It basically allows you to put both parachutes into the same compartment in the rocket instead of separate chute bays that is typical of a dual deployment rocket This makes the set up of a Tender Descender is a little more complex and therefore you should probably perform a traditional dual deployment rocket before this Get more info at www ApogeeRockets com Electronics_Payloads Tender _Descender Rail Buttons Most of the large kits come with rail buttons but you ll want to verify this by looking at the kit page on the Apogee
9. all of the hassles so you can focus on what you do best We are a volume seller Our web traffic means buyers will find you easier Our endorsement means you sell more and make more money o Usas 1 2 fo Vikas Cirrus Breeze Rocket Glider e Transforming changes balistic trajectory to a gliding aircraft by sliding the forward JO Efficient elliptcal and Or CIES dri e TS C EKAS ART CATS O MS ere iY ISSUE 362 APRIL 8 2014 DOGEE COMPONENTS www ApogeeRockets com If you re not getting enough sales let s talk wios sja oyoo hodye mmMM
10. angediE ngine Retainers o His gemekker GA seg He TS and Fiberglass Tubes O eda tea N erca Aun WWW APOgeeROC ketsscom ISSUE 362 APRIL 8 2014 ayes PERL PEER ERLEEELELIILD E an J gaaa aid an Ebay for the electron ics A payload bay is just an empty tube that can carry something inside It can be modified though Typically adding an Ebay into a payload bay is easy but it has to be accomplished during the construction of the rocket kit Why Because you ll be leaving out some of the components The Ebay contains its own bulkheads on the ends so you won t need the one on the payload bay You can simply leave the aft bulkhead off and just use the tube of the payload bay Figure 1 The typical Ebay kit contains the mounting board for the altimeter Does modifying a payload rocket into a dual deploy ment rocket change the stability of the rocket You bet But the good news is that it ALWAYS makes the rocket longer and therefore more stable This is a good thing So don t worry about if the kit is going to be unstable if you modify it to have an Ebay up front It will be more stable after you make the modification What size Ebay will you need to order for your rocket That s easy They are classified by tube diameter So if your rocket is 4 inches in diameter get an Ebay that fits into that 4 inch tube Electronic Altimeter You will need a dual deployment altimeter Here is where your options are
11. e they require very little electrical current to burst into flame and ignite the black powder in the ejection canister The next best igniter is the Quest Q2G2 www Apo geeRockets com Rocket_Motors Quest_Accessories Quest Q2G2_ Igniter _6pk It also requires very little cur rent Unfortunately at the time of this writing April 2014 they are out of stock by the manufacturer When we have information on their availability we ll post something on our web site You do NOT need to contact us and ask us if we have more information Until we post something on our web site we don t have any additional information You can call Quest and ask them if you want to talk to someone Apogee in my opinion is the most up front rocketry vendor on the internet because we update our web site every day with whatever information we have We are not holding anything back if the information you seek is not on our web site that means we don t have the information y Cyro Chaser Helicopter Rocket UCT e Ae 5 s like anormal rocket but then totor Ee See ears Competition efficiency high flights and long descent time Olaf IRS UAL and free spinning hub just like inj international VEELE Lola WES Clay ETT CEG Lukes cele OTS Wahi Wake lee NSU NS Lele CURLERS ETL LY Page 8 Other igniters might be used in dual deployment But in all honesty you ll need to read the user s manual of the altimeter and see which ones the manu
12. facturer recom mends Like mentioned it will also depend on which type of battery you use Black powder It is the black powder that actually pushes out the para chute When it ignites and burns it produces a tremendous amount of gas that pressurizes the inside of the rocket and causes It to slide apart You will need black powder Unfortunately it is also classified as an explosive by the government Apogee Components does not sell it for this reason The good news is that you can purchase it locally from a gun store that also sells muzzle loading supplies If you are old enough over 21 in the United States you can purchase up to 1 pound of black powder without an explosives permit That is enough for around 200 flights because you don t need very much per flight Parachutes Typically the rocket kit you purchase will come with one parachute It is always the main chute that will slow the rocket for the landing But the trend we ve been seeing from manufacturers is to leave the parachute out of the kit The reason is that it can save the customer money Check the Apogee Components web site to verify if the kit you want contains a parachute Drogue Parachute Other than the few dual deployment kits on the Apo gee Components web site the drogue chute is not included and must be purchased separately See Peak of Flight Newsletter 361 www ApogeeRockets com Education Continued on page 9 wios sya po
13. he contacts must be shorted for a minimum of 5 seconds It is just like holding down a momentary push switch for a duration of 5 seconds to turn on off the electronics See www ApogeeRockets com index php main_page product_supplies _ info amp cPath 52 159 amp products_id 1379 Ejection canisters The ejection canisters hold the black powder that is ignited to create the gas pressure that pushed out the para chutes As mentioned previously the ones that come in our mounting hardware kit are fixed in the rocket on the bulk heads of the Ebay But we also sell other canisters that are disposable but can be moved around inside the rocket prior to launch The nice thing about these canisters and why Continued on page 8 wio gt sja 2 0 yooKhody mmm Page 7 E a ee Hp Bit s 1 T lt a k Continued from page 7 What Do You Need For Dual Deployment they are so popular is that they have the igniter built into them That is one less component that you have to worry about www ApogeeRockets com Ejection_Systems Ejection Canisters Igniters Figure 6 Ejection canister with igniter The igniter is used to set off your ejection charges The igniter you use will be dependent on the altimeter and the battery that you select The best igniters are e matches But e matches are regulated by the federal government and require an explosives permit to purchase They are the best becaus
14. ics Accessories Electronics _Mounting_Kit which contains all the little items you ll need to mount the components of the dual deployment system into the rocket The advantage of our kit is the convenience of getting everything in one place You can also find the items individ ually if you want to save a little money Here are the items in the kit so you can see what types of things you ll need for your rocket Figure 4 Electronics Mount ing Hardware kit 4 40 Nylon standoffs used to hold your circuit board off of the sled board of your electronics bay We recommend nylon because is can shear apart should the rocket crash The shearing action re duces the energy that is transferred to the expen sive electronics Many people have told us that by using nylon instead of steel standoffs they were able to salvage the expensive part of the rocket the electronics that you ll also need to get the battery charger that goes with it Mounting Hardware Even though the Ebay has a mounting board typically called the sled for the electronics it doesn t contain the actual pieces parts to mount the printed circuit board to the sled At Apogee we have a Mounting Hardware Kit www Continued on page 6 Pratt Hobbies GO BOX Launch Controller Launch controller for mid power rockets Hooks right up to your car s battery No more dead AA batteries Plenty of electricity to set off any type of rocke
15. ingle person that absolutely loves chasing their rockets a long way and it doesn t matter what size they are Right The heart of the dual deployment rocket is the elec tronics and multiple recovery devices The electronics controls when the two recovery devices are deployed in the flight The first one is always deployed near apogee of the trajectory because this is the slowest point in the flight of the rocket The advantage of this is that the aerodynamic forces trying to tear the rocket apart are lowest when the speed of the rocket is the slowest The first recovery device is small like a tiny parachute or a streamer You can even use drogueless recovery as explained in Peak of Flight Newsletter 361 www Apo geeRockets com Education Downloads Newsletter361 pdf The purpose of the small recovery device is that the rocket descends quickly so that it doesn t drift very far in the wind The main parachute is always deployed later when the rocket is closer to the ground The chute is sized to slow the rocket to a speed where it won t be damaged on con tact with the ground Since it is deployed from the rocket at a low altitude in theory the rocket won t have time to drift very far even if it is breezy That is the way dual deployment is supposed to work So what do you need to accomplish this This article will give you a list of items to consider Not all of them are absolutely required but they do help assure a s
16. of the bulkheads In other words you won t have to hook up the igniter wires directly to the electronics You hook the wires up to the barrier strip instead This saves you time when you are preparing your rocket for flight 4 40 X 1 inch binding head screws These screws hold down the barrier strips to the bulkheads so they don t pop off during flight 4 40 Nuts The nuts are tightened down on the back side of the bulkheads that hold the barrier strips 22ga stranded wire in two colors 5 feet of each color This is probably all the extra hook up wire you ll need to connect your electronics to the ejec FLIGHT 4 pin 3M female crimp connector 4 pin 3M male crimp connector Used to make a quick discon nect on one end of the electronics bay This allows you to remove just one bulkhead from your Ebay if you want to take things apart to inspect the elec tronics just prior to flight Otherwise you ll need extra long wires that dangle around inside of the e bay which could whip around during flight and snag the electronics or battery Closed cell foam sheet This allows you to wrap up your battery and to provide any other protective foam inside the electronics bay This is more of a requirement for LiPo batteries that don t have the hard case that a regular 9V battery does Zip ties These are handy for securing to the sled board all the wires leading to the ejection charges the battery and the
17. on off switch They can be strung together to make longer wire ties for larger items in the Ebay Battery Connector We sell a 9V battery connector so that it is easy to quickly install the battery to power up the altimeter www ApogeeRockets com index php main_page product_sup plies _info amp cPath 52_ 159 amp products_id 1284 If you are using a LiPo battery you ll either need a different connec tor or you ll wire the battery directly to the altimeter which is more common with LiPo batteries Power Switch The purpose of the power switch is to conveniently turn off on the altimeter in the rocket If you don t have a power switch then you d have to physically disconnect the battery from the altimeter In rocketry we discourage simple flip switches or slide switch because they can accidentally be tion charge wells on the two bulkheads Continued on page 7 on page 7 Quick Change Motor Adapters e Allows you to use smaller diameter motors in your rocket kits adds versatility e Change out motors in seconds e Works with all single use and reloadable motors e Four sizes available Page 6 www ApogeeRockets com ISSUE 362 APRIL 8 2014 Continued from page 6 What Do You Need For Dual Deployment turned on by brushing against them during normal handling Also as the rocket takes off the jarring of the rocket can cause the switch to change position turning off the elec tronics If you
18. ones dual deployment system The ques tion we often get is Which one should you pick To be honest here at Apogee Components we like all the altimeter systems If they didn t work well we wouldn t carry them in our store The real question you might have then is why do we carry so many that have nearly identical capability And that is easy for me to answer At Apogee we sell a lot of altimeters and that causes an availability issue We sell them so fast that we run out of stock sooner than we anticipated If we are out of stock then our customers have no choices at all and have to put their projects on hold or buy from someone else Also since the hobby is fairly small our suppliers are not set up to run high volume production runs We can easily clean them out of inventory that they themselves have and we often do This causes supply disruptions of a particular dual deployment altimeter Therefore we carry products from several manufacturers so that we re reason ably confident that we ll have something good for a custom er when they want to get started in dual deployment So which one should you pick My answer is ask your friends for their advice or flip a coin If you call me and ask me which one you should buy I m not going to bad mouth any of the manufacturers that we carry Like said if they were junk wouldn t have them in our store The one additional criteria that you can use to select the altime
19. other topics like clustering and staging ApogeeRockets com Education Downloads Newsletter324 About The Author Tim Van Milligan a k a Mr Rocket is a real rocket scientist who likes helping out other rocketeers Before he started writing articles and books about rocketry he worked on the Delta II rocket that launched satellites into orbit He has a B S in Aeronautical Engineering from Embry Riddle Aeronautical University in Daytona Beach Florida and has worked toward a M S in Space Technology from the Florida Institute of Technology in Melbourne Florida Cur rently he is the owner of Apogee Components http www apogeerockets com and the curator of the rocketry educa tion web site http www apogeerockets com education He is also the author of the books Model Rocket Design and Construction 69 Simple Science Fair Projects with Model Rockets Aeronautics and publisher of a FREE e zine newsletter about model rockets Wanted Your Rocket Products If you re a manufacturer of rocketry products like kits electronic payloads parts construc tion tools motors launch equipment or something totally cool we re interested in talking to you We re always looking for new products to sell So why have Apogee sell your products We have the best customers that are looking for something new We provide the product support for the customers so you don t have to We take care of
20. stant like Nylon strap then you might want to consider a shock cord protector It insulates the shock cord from the heat of the ejection charge If you are using a Keviar shock cord you do not need a shock cord protector You ll find shock cord protectors at Parachute Swivels It is rare that a descend ing rocket does not sway and spin as it descents To prevent the suspension lines on the parachute from winding up a parachute swivel is used We have several sizes on our web site that can be added depending on the weight of the rocket Ty OG Figure 10 Parachute Swivels Deployment Bags The size you choose will depend on the diameter of the rocket kit Continued on page 11 looking For A Fun Rocket Roam In Our Forest of Over 190 Different Types e Unique and exotic kits iy 20 different manufacturers Skill Levels range from easy to fiendish e Sizes 1 4A motor to level 2 high power e We amp fly them to find out what they re like saving you grief i i O new ones arriv ing all the time bulk packs available too wio gt sja Oo Yyoobody mmm WWE pOgeeRockets com Rockets_By Manufacturers Continued from page 10 What Do You Need For Dual Deployment Deployment bags are used on large diameter para chutes to assure they open slowly and in an orderly fash ion More information can be found on our web site at www ApogeeRockets com Building_ Supplies Parachutes _
21. t motor igniter 24 foot cord allows you to stand far back for launch safety Audible continuity buzzer lets you know the circuit is armed and ready for launch _ Brought to you by Apocee A PT coMPONENTS Flatjaw alligator clips for easy hook up of igniter www ApogeeRockets com Launch_Accessories Launch_ Controllers Go_Box_Launch_Controller ISSUE 362 APRIL 8 2014 Page 5 me i E T n 1 Continued from page 5 What Do You Need For Dual Deployment 4 40 X 3 16 Nylon screws used to secure your elec tronics circuit board to the nylon standoffs 4 40 Nylon nuts can be used on the bottom of the nylon standoffs if you have a thin sled board that doesn t have enough thickness to make threads using the tap 43 Drill Bit To drill the holes in your ebay sled for the mounting hardware 4 40 3 flute plug tap To put threads in the holes in the ebay sled so you can screw in the nylon stand offs for the circuit board 1 2 inch CPVC pipe cap These are used to hold the ejection charge powder a type of ejection charge canisters These heavy duty holders do not need to be replaced after each flight as they are reus able 2 56 X 3 4 inch Fillister head screw These hold the ejection charge caps down against the two bulk heads on the electronics bay 2 Circuit barrier strip These allow you to quickly hook up your igniters for the ejection charges to the outside ends
22. ter is how it interfaces to your personal computer That is where they differ slightly Some connect directly via a USB cord and some require special cables or interface device Check our web site and better yet download the users manuals for each of the altimeters to see which one is more comfortable for you to work with Battery But that still leaves several manufacturers to choose Continued on page 5 Rocket Jewel ry 3 e The Perfect Launch Range Accessory e Subtle Tasteful Fashionable amp Distinctive e Makes A Great Gift for Family and Friends Display Your Passion for Rocketry www ApogeeRockets com Page 4 ISSUE 362 APRIL 8 2014 Town fA wll abe oe eet ero PEA FCFETGH Continued from page 4 What Do You Need For Dual Deployment First of all some altimeters come with a battery but most of them don t The battery which powers the altimeter and ignites the ejection charges is not nor mally included with the altimeter Almost all of them will use a 9 Volt battery but the trend among flyers is towards LiPo batteries for their lower weight and higher energy densities If you re trying to use a small diameter rocket under 2 6 inches in diame ter you ll probably opt for the smaller LiPo battery because room in the rocket is always needed LiPo Battery Figure 3 LiPo battery If you go with a rechargeable LiPo battery remember ApogeeRockets com Electronics _Payloads Electron
23. uccessful flight Rocket kit If you re just starting out in high power rocket or using dual deployment recovery highly recommend starting out with a rocket kit The advantage of a kit over scratch build ing is that you get a rocket of proven stability You will have enough to worry about with the dual deployment items so why worry about the rocket itself being stable and structur ally sound In theory every rocket could be used for dual deploy ment But once you consider what is needed for success you ll probably come to the conclusion that it is easier to start with a rocket kit that was specifically set up for dual deployment The most important criteria is that the rocket needs some location to house the electronics In the indus try we call this the electronics bay or Ebay for short It is also sometimes called the avionics bay Av bay for short Unfortunately the terminology can sometimes cause confusion for people new to dual deployment rockets The term payload bay sounds very similar to electronics bay but it is subtly different A payload can be almost anything carried in the rocket like an egg a stuffed animal or a lander device Sometimes a payload could be electronics but it doesn t have to be On the other hand an electronics bay is much more specific in what goes inside So if you see a rocket kit that has a payload bay it doesn t necessarily mean that it can be
24. used as an ebay Not without some modification of course But the good news is that you can turn a payload bay into an electronics bay What kind of rocket kit should you consider for use as a dual deployment rocket If it is not already set up as a dual deployment kit http www apogeerockets com Rocket_Kits Dual_ Deployment then recommend some thing large in diameter and with a long payload bay These are the easiest to work with A list of payload capable rockets is listed on our web site at http www apogeerockets com Rocket_Kits Pay load Capable_ Rockets Again not all of these are easily Continued on page 3 About this Newsletter Newsletter Staff You can subscribe to receive this e zine FREE at the Apogee Components web site www ApogeeRockets com or by sending an e mail to ezZine apogeeRockets com with SUB SCRIBE as the subject line of the message Page 2 Writer Tim Van Milligan Layout Cover Artist Tim Van Milligan Proofreader Michelle Mason ISSUE 362 APRIL 8 2014 Continued from page 2 What Do You Need For Dual Deployment convertible into dual deployment rockets but it is a good place to start The reason suggest a large diameter rocket is that it gives you a lot of internal volume to house the electron ics In other words big rockets are more forgiving of where and how you mount the electronics You can for example make huge mistakes on mounting the electronics and
25. yoobody mmm ISSUE 362 APRIL 8 2014 Fi P K TT p if per Continued from page 8 What Do You Need For Dual Deployment Downloads Newsletter361 pdf for information on selecting the right size drogue chute for your rocket Optional Supplies When people call us they often ask for a complete list of everything they might need It is hard to say if the fol lowing items are needed but can tell you that they make dual deployment easier to accomplish Motor Retainer The motor has to be restrained during the flight pre vented from moving either forward into the rocket or being expelled rearward when the ejection charge goes off Most high power kits do not come with a retainer They must be purchased separately Choosing the correct one will depend on which mo tor tube you have The motor retainers are sized for a specific size tube So when you order your kit be sure to pay attention to the diameter of the engine mount tube and the manufacturer that makes the tube Figure 7 Motor Retainer Once you have that information go to the Apogee web site and first look at the diameter of the retainers This will get you into a category of two or three retainers Next match the specific manufacturer of the tube to the retainer On the Apogee web site www ApogeeRockets com Building Supplies Motor_Retainers_ Hooks we list which manufacturer s tubes the retainer will fit onto

Issue #362 - Apogee Components

Contents

Download Pdf Manuals

Related Search

Related Contents