Rocket Recovery helps you determine the performance characteristics of a model rocket using particular engines and recovery devices such as parachute. Rocket Recovery allows you to create, customize and select a rocket to launch. It also determines the weather conditions and predicts where your rocket will land, and will display this on a map. Know before you launch where it will land.
EULA & Privacy Policy Screens
When you first open Rocket Recovery you will see the End User License Agreement and Privacy Policy screens. You will only see these once unless they are updated in the future. Please read, and choose acknowledge each of these and you will be taken to the Rocket Setup Screen.
Location Privacy
Once the EULA and Privacy Policy are accepted and acknowledged, respectively, you will be taken to the Rocket Setup Screen. With your first use, you will see a request to allow Rocket Recovery access to your precise location. 
Rocket Recovery needs this to be able to track your location and project the rocket’s landing location, as well as obtaining the correct weather data. If you decline access, Rocket Recovery will not work as expected. You can always change the permissions in the Settings app.
Rocket Setup
Now that you have finished the set up, you can begin to use Rocket Recovery. You are now on the Rocket Setup Screen.
You can further customize the units that you want to work in, and they may be different systems for each different measurement. You can do this by clicking the “Gear” icon in the upper right to take you to settings.
Or you can simply choose to select your rocket. When you first open the app, there will be no rockets available. Not to worry, adding one is simple. Click the “Choose Rocket” button. This will take you to the screen that will list all of your rockets. 
In the upper right corner, push the “+” button and a new, blank, rocket will be inserted into the list. 
Tapping that rocket brings you to the detail screen.
Editing Your New Rocket
I am going to enter the information for one of Estes new beginner Rockets, the NASA SLS. Click the edit button in the lower right hand corner allows you to edit the details. First choose the manufacturer by clicking on “Unassigned”. That will take you to the Manufacturer Picker.
The manufacturers listed all make a motor contained in the database. If you don’t see the manufacture you need, you can easily add it by selecting “Edit Manufacturers”. This brings you to the Manufacturer Edit screen. Simply push the + in the upper right, and a new manufacturer will slide into place. 
Touch “Edit”, select the new manufacturer, and change the name.
Proceed to enter the rest of the information on the edit screen.
To change the motor class, simply touch the disclosure triangle next to it and select each motor class you wish.
The same works for the motor diameters above. Once all information is entered, tap the “Done” button and then tap the “Use Rocket” button at the bottom.
You will then be taken back to the Rocket Setup page with your new rocket entered.
Choose Motor
Now you will also notice that “Choose Motor” is selectable. When you tap it, you will be taken to the Motor Picker Screen. 
Notice that ONLY 18mm diameter, C engines are displayed. No scrolling through a LONG list of motors to pick the correct one. Estes recommends their C5-3 or C6-3. So we will choose the Estes C6. This will give you the Motor Detail page. 
This information comes from ThrustCurve.org and is not editable. You cannot delete motors either. As new motors are added to the ThrustCurve.org database, they will be made available in the app with an update. At the bottom, you will see the delay section. As a C6 can be used as a booster, you will note that the initial delay is a 0. Tap that and choose 3s for 3 seconds.
You will be taken back to the detail page and the motor will now show a 3 second delay. Scroll down to “Use Motor” and tap that.
You will return to the Rocket Setup screen. 
The C6-3 motor is now in place.
Choose Recovery Device
Tap “Choose Recovery Device” and you will be taken to the Recovery Device Picker screen. Currently there are three choices of devices. Basic parachutes, streamers and SkyAngle™️ parachutes.
Again, this will be empty for the Parachute and Streamer side. The SkyAngle™️ side is fully stocked and can’t be changed. Any new SkyAngle™️ parachutes will be added in an update.
Add New Parachute or Streamer
We will use a new parachute as the example as it is a little more complex than a streamer to set up. First touch the + button. That will insert a new parachute.
Tap on “A New Parachute” and that will take you to the Parachute Detail screen. 
Tap “Edit”
, delete the name to leave it blank and enter 15 inches for the diameter 
as Estes calls for a 15″ parasheet. You can also change various metrics like the shape, material, how you are measuring it, whether it is vented and the size of the vent.
Once you are finished entering the information, tap “Done” and the “Use Parachute”. 
You will now be back at the Rocket Setup screen, with a properly named parachute now shown. 
At this point, assuming your phone has determined its location and was able to access the weather, you will see that the “Launch” button is now tappable.
Launch
Tapping “Launch” makes the magic happen! Rocket Recovery makes 100 computations for every second of the powered and coast flight of the rocket. And it happens as the transition to the Flight Data screen occurs.
The first two images show the data that Rocket Recovery makes available. The third image is the Recovery Map screen that shows you where the rocket is predicted to land, as well as your location and the location of the launch pad. In this instance, the user is still at the launch pad. Your position will move so you can be guided straight to the prediction area. As you can see, using a 3 foot long launch guide was a little short for the NASA SLS, especially in these wind conditions. The “Velocity Leaving Launcher” and the “Weathercock Angle” are both red, indicating dangerous numbers. Maybe we shouldn’t fly this bird in this wind, and either way the launch guide should be longer.
Logging the Flight
You can tap Log the Flight at the bottom of the screen, and a new log, with this data, will be created. The button will then show as “Flight is Logged” to denote this.
If you want to view the log, just tap the “Flight Logs” icon at the bottom of the screen, and that will switch you over to the Flight Log Picker screen.
As you can see, this is the first log. Tapping it takes you to the Flight Log Detail screen shown below:
Most of the information is filled in for you, especially things like the time and date, the weather conditions, the rocket setup as well as the computed values. You can also add information as to your observations of the performance in flight and recovery, as well as edit any of the information simply by tapping “Edit”.
This works similarly to all of the different edit modes we have already discussed.
Advanced Editing and Drag Coeffecients
In the Rocket Detail, Parachute Detail and Streamer Detail screens, you will see an “Advanced Edit” switch. 
Flipping this switch allows you to change the drag coefficient. Please do not change this unless you understand exactly what you are doing for either the streamer or parachute. If you find that Rocket Recovery consistently is incorrect in its flight predictions, you can play with the rocket’s drag coefficient to make the simulator more accurate in its predictions.
Payload, Multi-Stage and Cluster Rockets
Rocket Recovery fully supports payloads, as well as, cluster and multi-stage rockets.
You will be able to add a payload in the Rocket Setup screen once a rocket is chosen. Payloads are optional, so there is no indicator next to it. Payloads are chosen and added like everything else.
Multi-stage rockets are handled by simply adding stages to the rocket. You can choose to add or subtract stages in the buttons. When you do, you will see the Rocket Detail screen expands to handle the multiple stages.
Each stage is dealt with separately, and are fully customizable. It is possible to make add a multi=stage cluster rocket, though the logistics of actually flying one would be interesting. Use your best judgment.
Cluster rockets are simply handled by tapping the stepper until the correct number of motors for that stage are displayed.
Location
You can change the location of the launch site to anywhere in the world. Simply slide the “Auto Location” switch to manual, and the latitude and longitude will turn blue. 
Tapping that will take you to the Launch Location Map screen. From there, you can handle the map like any normal map, to zoom and drag to the correct location. 
You will notice that the windspeed and direction are shown at the top to assist you in placing your launchpad.
Wind Configuration
The wind is automatically obtained from the weather. However, you are free to change that to test various scenarios. Just like with the location, above, sliding the switch turns the windspeed and direction blue. Tapping them brings you to the Wind Adjust screen.
The windspeed is adjusted with the stepper at the top, wind gusts by the next stepper, and the direction by the slider at the bottom. Wind gusts must be higher or equal to windspeed. If you attempt to make the windspeed faster than the gusts, or the gusts slower than the windspeed, you will see that both will change in lockstep. Lastly, if you do not press “Save Wind” your changes will not be saved for the launch.
Launch Pad Configuration
You can configure the length of the guide as well as the angle in the Launchpad Configuration screen. Once you slide the switch and tap the blue launchpad configuration, you will be taken to the the Launchpad Configuration screen.
You can adjust the angle up to 20° and change the guide length up to 8′.
We here at Alelin Apps hope you enjoy your flight!