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Skycat Trigger Unit (relay version)
We do not sell this product at the moment. You may order through Skycat's online shop.
The Relay trigger for Skycat parachute launcher. Connects to the receiver, flight battery (or separate battery) and to the Skycat launcher unit.
The Relay has a constant current rating of 30A, therefore it can also be used for high current RC switch applications
The trigger unit listens to a PWM signal from your UAV's radio, and upon command, transfers energy from a UAV battery or dedicated battery to the launcher. Two or more triggers are supported for redundancy. Weight: 46 grams / 1.6 oz.
The Trigger is compatible for 3S and 4S batteries. Trigger works also as high current RC switch. Relay is rated for 30A constant current.
| Operating voltage | 3S - 4S |
| Trigger weight (in grams) | 46 |
| Trigger weight (in ounces) | 1.6 |
| Current Rating (in amps) | 30 |
Radio Settings Manual
Manual explaining how to configure a FrSky Taranis transmitter to trigger the Skycat parachute.
Download (1.27M)1. How many channels does the eject require from the receiver?
- Just one channel.
2. How quickly does the parachute eject from launch command?
- The parachute ejects within 0.08 to 0.2 seconds.
3. Does Skycat parachutes uses RC servos or CO2 pressure for launch?
- No they don't.
3. If they don't use servos or pressure, what is it that makes the parachute eject?
- The patent-pending method uses a strong spring, held in tension by a fuse. Once the fuse is blown by pilot's command, the parachute gets ejected. It's a multi-use system with high reliability and short reload time.
4. Does the launch harm the battery?
- Not in any way, about 30 A is pulled from the battery for a very shot time.
5. How strongly does the launcher need to be installed on the UAV frame?
- If it doesn’t fall by itself and can withstand eject recoil, it is enough. The parachute is attached to the UAV frame directly, which avoids strong forces to the launcher itself.
6. Does the launcher carry a parachute deploy impact forces and a copter weight?
- No, it just kicks the parachute out.
7. Where is the parachute attached to the copter?
- To the strongest points of your UAV frame, using the attachment set available in the store.
8. What is the correct size of the parachute?
- It depends how big of an impact is acceptable for you. See the tables below.
Descent metrics for a 2.5 m2 and IFC-48-S parachutes
| Drone weight, kg | Descent speed, m/s | Impact energy, joules | Freefall equivalent, meters |
|---|---|---|---|
| 3.5 | 4.6 | 37 | 1.08 |
| 4.0 | 5.1 | 52 | 1.32 |
| 4.5 | 5.4 | 65 | 1.47 |
| 5.0 | 5.7 | 80 | 1.63 |
| 5.5 | 5.9 | 97 | 1.80 |
| 6.0 | 6.2 | 115 | 1.96 |
| 7.0 | 6.7 | 157 | 2.29 |
| 8.0 | 7.2 | 205 | 2.61 |
| 9.0 | 7.6 | 260 | 2.94 |
| 10.0 | 8.0 | 321 | 3.27 |
| 11.0 | 8.4 | 388 | 3.59 |
| 12.0 | 8.8 | 461 | 3.92 |
| No parachute, comparison: | |||
| 10.0 | 50.0 | 12 500 | ∞ (infinity) |
Descent metrics for a 4 m2 and IFC-60-S parachutes
| Drone weight, kg | Descent speed, m/s | Impact energy, joules | Freefall equivalent, meters |
|---|---|---|---|
| 3.5 | 3.4 | 20 | 0.59 |
| 4.0 | 4.0 | 32 | 0.81 |
| 4.5 | 4.3 | 42 | 0.94 |
| 5.0 | 4.5 | 51 | 1.03 |
| 5.5 | 4.8 | 63 | 1.17 |
| 6.0 | 5.0 | 75 | 1.27 |
| 7.0 | 5.3 | 98 | 1.43 |
| 8.0 | 5.7 | 130 | 1.65 |
| 9.0 | 6.1 | 167 | 1.90 |
| 10.0 | 6.4 | 205 | 2.09 |
| 11.0 | 6.7 | 247 | 2.29 |
| 12.0 | 7.0 | 294 | 2.50 |
| No parachute, comparison: | |||
| 10.0 | 50.0 | 12 500 | ∞ (infinity) |
9. Does the launcher ship with an automatic eject system?
- No, the pilot is responsible for launching the parachute.
10. Does launcher support an automatic eject system?
- Yes it does. Connect the trigger unit to your autopilot's PWM eject command channel and it will work.
11. Is it possible to use more than one trigger units for redundancy?
- Yes, you can connect as many trigger units as you need. For Pilot, Autopilot, Camera operator and ground station for instance.
12. Is there a Skycat parachute for DJI Inspire 1?
- Yes, the X55 all-in-one launcher is ideal for DJI Inspire 1 in size.
13. Is there a Skycat parachute for DJI S900?
- Yes, the X68 all-in-one launcher with IFC-60-S parachute is ideal for DJI S900.
14. Is there a Skycat parachute for DJI Phantom?
- Not yet.
15. Does Skycat sell a flight terminator / kill switch?
No, but their trigger unit helps if you want to make a simple one yourself. Use large enough NC relay(s) for motor power. The trigger unit can open the circuit upon an eject request. Use a Y-split from the trigger unit to control the motor relays, and to blow the launcher fuse, simultaneously.
16. May I use 6S battery with Trigger
- Officially the answer is no. However, Skycat has run lab tests using a 6S/10Ah without problems. They don't officially support 6S yet, because they haven't had a chance to perform long-term evaluations with it.
