1. Introduktion
The Estes 2240 PS II Launch Controller is an essential accessory designed for safe and reliable launching of Estes model rockets. This controller is fully assembled and supports both single-engine and 2-engine-cluster rockets. It incorporates a dual-button arming and launch system for enhanced safety, an audible continuity buzzer for quick diagnostics, and an option for an alternate power source. The unit includes a 30 ft (9.1 m) heavy-duty cable with 4 alligator clips, allowing users to maintain a safe distance during launch operations. It operates on 6 C-size alkaline batteries (not included) to provide consistent power for each flight.
This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your Estes 2240 PS II Launch Controller to ensure a successful and safe model rocket experience.
2. Sikkerhedsoplysninger
WARNING: Not a Toy. Ages 14+
- Always read and understand all instructions before operating the launch controller.
- Connect the launch controller at the launch site only when you are ready to launch.
- Insert the safety key only when all personnel are at least 30 ft (9.1 m) away from a flight-ready rocket.
- Always follow the NAR (National Association of Rocketry) model-rocket safety code during all rocket kit operations.
- Ensure the launch site is clear of obstructions and people before initiating a launch.
- Never point a rocket at people or property.
3. Hvad er der i æsken

The Estes 2240 PS II Launch Controller package includes the following components:
- Estes Rockets 2240 PS II Rocket Launch Controller
- Sikkerhedsnøgle
- 30 ft (9.1 m) of Heavy-Duty Cable with 4 Alligator Clips
Note: 6 C-size alkaline batteries are required for operation and are not included.
4. Opsætning

Proper setup of your launch controller is crucial for safe and successful rocket launches. Follow these steps carefully:
4.1 Batteriinstallation
- Locate the battery compartment on the underside of the launch controller.
- Using a Phillips head screwdriver, carefully remove the screws securing the battery compartment cover.
- Insert 6 C-size alkaline batteries into the compartment, ensuring correct polarity (+/-) as indicated inside the compartment.
- Replace the battery compartment cover and secure it with the screws.
- Alternatively, the controller supports an external power source via a JST plug (e.g., 3S LiPo battery, not included). Consult advanced user guides or experienced hobbyists for this option.
4.2 Connecting the Launch Cable
- Uncoil the 30 ft (9.1 m) heavy-duty cable.
- Connect the two main leads from the cable to the corresponding terminals on the launch controller. Ensure a secure connection.
- At the launch pad, connect the four alligator clips to the igniter leads of your model rocket. Ensure a firm connection to the igniter and that the clips are not touching each other or any metal parts of the rocket.
5. Betjeningsvejledning

The Estes 2240 PS II Launch Controller features a protective dual-button arming and launch system to prevent accidental ignitions. Follow these steps for a safe launch:
5.1 Arming the Controller
- Ensure the rocket is properly set up on the launch pad and all safety precautions are observed.
- Verify that all personnel are at least 30 ft (9.1 m) away from the rocket and launch pad.
- Insert the safety key into the designated slot on the controller. The red indicator light should illuminate, and an audible continuity buzzer will sound if the igniter circuit is complete and ready.
- If the buzzer does not sound, refer to the Troubleshooting section.
5.2 Launching a Rocket
- Once the controller is armed and the continuity buzzer is active, initiate a countdown (e.g., "5, 4, 3, 2, 1, LAUNCH!").
- Simultaneously press and hold both the yellow arming button and the red launch button.
- The rocket motor should ignite immediately. Continue to hold the buttons until the rocket has cleared the launch pad.
- After launch, release the buttons and remove the safety key from the controller.
6. Vedligeholdelse
To ensure the longevity and reliable performance of your Estes 2240 PS II Launch Controller, follow these maintenance guidelines:
- Rensning: Wipe the controller's exterior with a clean, dry cloth after each use to remove any dirt or debris. Avoid using harsh chemicals or abrasive cleaners.
- Batteriopbevaring: If the controller will not be used for an extended period, remove the C-size batteries to prevent leakage and corrosion.
- Kabelpleje: Inspect the launch cable and alligator clips regularly for any signs of wear, fraying, or damage. Replace the cable if necessary. Store the cable neatly coiled to prevent tangles and damage.
- Opbevaring: Store the launch controller in a cool, dry place, away from direct sunlight and extreme temperatures. Keep it in its original packaging or a protective case to prevent physical damage.
7. Fejlfinding
If you encounter issues with your Estes 2240 PS II Launch Controller, consult the table below for common problems and their solutions:
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Controller does not power on / Red light does not illuminate. | Dead or incorrectly installed batteries; Safety key not inserted. | Check battery polarity and replace if dead. Ensure safety key is fully inserted. |
| No audible continuity buzzer. | Igniter not properly connected; Damaged igniter; Faulty cable connection; Low battery power. | Ensure alligator clips are firmly attached to igniter leads. Replace igniter if damaged. Check cable connections to controller and clips. Replace batteries. |
| Rocket does not ignite. | No continuity (see above); Buttons not pressed simultaneously; Insufficient battery power for ignition. | Verify continuity buzzer is active. Ensure both arming and launch buttons are pressed at the same time. Replace batteries with fresh ones. |
| Loose JST connector for alternative power source. | Manufacturing tolerance; Battery not secured. | Ensure the alternative battery is positioned to maintain contact with the JST connector. Some users may modify the compartment for a tighter fit (use caution). |
8. Specifikationer
Key technical specifications for the Estes 2240 PS II Launch Controller:
| Feature | Detalje |
|---|---|
| Modelnummer | 2240 |
| Produktdimensioner | 7.6 x 4.3 x 1.7 tommer (19.3 x 10.9 x 4.3 cm) |
| Varens vægt | 12 ounce (340 gram) |
| Strømkilde | 6 C-size alkaline batteries (not included) or alternative power source via JST plug |
| Kabellængde | 30 fod (9.1 m) |
| Anbefalet alder | 10 years and up (Safety Information recommends 14+) |
| Fabrikant | Estes |
| Udgivelsesdato | 1. januar 2018 |
9. Garanti og support
Estes products are manufactured to high standards. For specific warranty information regarding your 2240 PS II Launch Controller, please refer to the documentation included with your purchase or visit the official Estes website. For technical support, product inquiries, or to purchase replacement parts, please contact Estes customer service directly through their official channels.
Du kan finde mere information og kontaktoplysninger ved at besøge Estes Store on Amazon eller deres officielle virksomhed webwebsted.





