fehim yamak calgavA single SF-30H Solar Funnel would not get to Mars quickly. If the funnel travels on its own using solar-sail propulsion, the journey would probably take years; if its roughly 20 kW laser supports a very lightweight spacecraft, the trip could potentially be reduced to months, but slowing down at Mars remains a separate challenge.
The Funnel Traveling to Mars
The SF-30H’s solar-sail propulsion would add only tens to hundreds of metres per second of velocity each year. Reaching Mars from Earth requires velocity changes on the scale of kilometres per second, so a rough engineering estimate is:
| Mission type | Estimated travel time |
|---|---|
| SF-30H traveling by solar sail alone | 5–15 years |
| Funnel with additional electric propulsion | 1–3 years |
| Conventional chemical transfer | 6–9 months |
| Large laser-thermal system | About 45 days |
The 5–15 year estimate is highly dependent on the module’s mass, solar-sail efficiency, departure method from Earth, and trajectory design. Solar sails provide continuous thrust without consuming propellant, but the thrust is low and interplanetary missions require optimized trajectories. [1][2]
Sending a Small Craft With Its Laser
Assume one Solar Funnel produces 13–31 kW of laser power and can send an average of about 20 kW to a very lightweight laser-sail spacecraft.
| Spacecraft | Estimated time | Reality |
|---|---|---|
| 1 kg micro-probe | 3–12 months | It can accelerate, but stopping at Mars is difficult |
| 10 kg small probe | 6–18 months | A single laser is still relatively weak |
| 100 kg satellite | Not shorter than 6–9 months | The laser cannot serve as the main engine |
| 1-ton spacecraft | Not suitable | One module is far too weak |
These estimates assume the laser can remain aimed at the spacecraft for a long time, the planets are properly aligned, and the spacecraft can slow down near Mars using the atmosphere or another braking method. Standard low-energy Earth-to-Mars missions typically take 6–9 months, with efficient launch opportunities occurring roughly every 25 months. [3][4]
What Is Needed for 45 Days?
A 45-day trip is far beyond one Solar Funnel. A published laser-thermal concept assumes roughly 100 MW of laser power, a payload near one tonne, and hydrogen propellant carried onboard. That is about 5,000 times more laser power than a single SF-30H producing about 20 kW. [5][6]
$$
\frac{100\ \text{MW}}{20\ \text{kW}}
5{,}000
$$
At that scale, thousands of Solar Funnels would need to combine and precisely direct their laser beams onto one spacecraft.
Short Answer
- The Solar Funnel traveling alone: about 5–15 years to reach Mars.
- A 1 kg micro-probe powered by one funnel’s laser: about 3–12 months, but it would still need a way to slow down at Mars.
- A crewed or tonne-class spacecraft: one funnel is not enough.
- A 45-day Mars mission: would require roughly 100 MW of laser power and a hydrogen-fueled laser-thermal engine; one SF-30H is thousands of times too small.
A single SF-30H Solar Funnel would not get to Mars quickly. If the funnel travels on its own using solar-sail propulsion, the journey would probably take years; if its roughly 20 kW laser supports a very lightweight spacecraft, the trip could potentially be reduced to months, but slowing down at Mars remains a separate challenge.
The Funnel Traveling to Mars
The SF-30H’s solar-sail propulsion would add only tens to hundreds of metres per second of velocity each year. Reaching Mars from Earth requires velocity changes on the scale of kilometres per second, so a rough engineering estimate is:
| Mission type | Estimated travel time |
|---|---|
| SF-30H traveling by solar sail alone | 5–15 years |
| Funnel with additional electric propulsion | 1–3 years |
| Conventional chemical transfer | 6–9 months |
| Large laser-thermal system | About 45 days |
The 5–15 year estimate is highly dependent on the module’s mass, solar-sail efficiency, departure method from Earth, and trajectory design. Solar sails provide continuous thrust without consuming propellant, but the thrust is low and interplanetary missions require optimized trajectories. [1][2]
Sending a Small Craft With Its Laser
Assume one Solar Funnel produces 13–31 kW of laser power and can send an average of about 20 kW to a very lightweight laser-sail spacecraft.
| Spacecraft | Estimated time | Reality |
|---|---|---|
| 1 kg micro-probe | 3–12 months | It can accelerate, but stopping at Mars is difficult |
| 10 kg small probe | 6–18 months | A single laser is still relatively weak |
| 100 kg satellite | Not shorter than 6–9 months | The laser cannot serve as the main engine |
| 1-ton spacecraft | Not suitable | One module is far too weak |
These estimates assume the laser can remain aimed at the spacecraft for a long time, the planets are properly aligned, and the spacecraft can slow down near Mars using the atmosphere or another braking method. Standard low-energy Earth-to-Mars missions typically take 6–9 months, with efficient launch opportunities occurring roughly every 25 months. [3][4]
What Is Needed for 45 Days?
A 45-day trip is far beyond one Solar Funnel. A published laser-thermal concept assumes roughly 100 MW of laser power, a payload near one tonne, and hydrogen propellant carried onboard. That is about 5,000 times more laser power than a single SF-30H producing about 20 kW. [5][6]
$$
\frac{100\ \text{MW}}{20\ \text{kW}}
5{,}000
$$
At that scale, thousands of Solar Funnels would need to combine and precisely direct their laser beams onto one spacecraft.
Short Answer
- The Solar Funnel traveling alone: about 5–15 years to reach Mars.
- A 1 kg micro-probe powered by one funnel’s laser: about 3–12 months, but it would still need a way to slow down at Mars.
- A crewed or tonne-class spacecraft: one funnel is not enough.
- A 45-day Mars mission: would require roughly 100 MW of laser power and a hydrogen-fueled laser-thermal engine; one SF-30H is thousands of times too small.
