Technology:
Starships

Starship Travel

Acceleration Chart

The following chart explains the amount of acceleration that a starship can maintain. Thus, a SPD 3 starship with 20" of Flight can achieve 1G of acceleration.

Acceleration Chart
Flight
Vehicle Speed (SPD)
1
2
3
4
5
6
7
8
9
10
11
12
1"
0.02G 0.03G 0.05G 0.07G 0.08G 0.10G 0.12G 0.13G 0.15G 0.17G 0.18G 0.20G
2"
0.03G 0.07G 0.10G 0.13G 0.17G 0.20G 0.23G 0.27G 0.30G 0.33G 0.37G 0.40G
3"
0.05G 0.10G 0.15G 0.20G 0.25G 0.30G 0.35G 0.40G 0.45G 0.50G 0.55G 0.60G
4"
0.07G 0.13G 0.20G 0.27G 0.33G 0.40G 0.47G 0.53G 0.60G 0.67G 0.73G 0.80G
5"
0.08G 0.17G 0.25G 0.33G 0.42G 0.50G 0.58G 0.67G 0.75G 0.83G 0.92G 1.00G
6"
0.10G 0.20G 0.30G 0.40G 0.50G 0.60G 0.70G 0.80G 0.90G 1.00G 1.10G 1.20G
7"
0.12G 0.23G 0.35G 0.47G 0.58G 0.70G 0.82G 0.93G 1.05G 1.17G 1.28G 1.40G
8"
0.13G 0.27G 0.40G 0.53G 0.67G 0.80G 0.93G 1.07G 1.20G 1.33G 1.47G 1.60G
9"
0.15G 0.30G 0.45G 0.60G 0.75G 0.90G 1.05G 1.20G 1.35G 1.50G 1.65G 1.80G
10"
0.17G 0.33G 0.50G 0.67G 0.83G 1.00G 1.17G 1.33G 1.50G 1.67G 1.83G 2.00G
11"
0.18G 0.37G 0.55G 0.73G 0.92G 1.10G 1.28G 1.47G 1.65G 1.83G 2.02G 2.20G
12"
0.20G 0.40G 0.60G 0.80G 1.00G 1.20G 1.40G 1.60G 1.80G 2.00G 2.20G 2.40G
13"
0.22G 0.43G 0.65G 0.87G 1.08G 1.30G 1.52G 1.73G 1.95G 2.17G 2.38G 2.60G
14"
0.23G 0.47G 0.70G 0.93G 1.17G 1.40G 1.63G 1.87G 2.10G 2.33G 2.57G 2.80G
15"
0.25G 0.50G 0.75G 1.00G 1.25G 1.50G 1.75G 2.00G 2.25G 2.50G 2.75G 3.00G
16"
0.27G 0.53G 0.80G 1.07G 1.33G 1.60G 1.87G 2.13G 2.40G 2.67G 2.93G 3.20G
17"
0.28G 0.57G 0.85G 1.13G 1.42G 1.70G 1.98G 2.27G 2.55G 2.83G 3.12G 3.40G
18"
0.30G 0.60G 0.90G 1.20G 1.50G 1.80G 2.10G 2.40G 2.70G 3.00G 3.30G 3.60G
19"
0.32G 0.63G 0.95G 1.27G 1.58G 1.90G 2.22G 2.53G 2.85G 3.17G 3.48G 3.80G
20"
0.33G 0.67G 1.00G 1.33G 1.67G 2.00G 2.33G 2.67G 3.00G 3.33G 3.67G 4.00G
21"
0.35G 0.70G 1.05G 1.40G 1.75G 2.10G 2.45G 2.80G 3.15G 3.50G 3.85G 4.20G
22"
0.37G 0.73G 1.10G 1.47G 1.83G 2.20G 2.57G 2.93G 3.30G 3.67G 4.03G 4.40G
23"
0.38G 0.77G 1.15G 1.53G 1.92G 2.30G 2.68G 3.07G 3.45G 3.83G 4.22G 4.60G
24"
0.40G 0.80G 1.20G 1.60G 2.00G 2.40G 2.80G 3.20G 3.60G 4.00G 4.40G 4.80G
25"
0.42G 0.83G 1.25G 1.67G 2.08G 2.50G 2.92G 3.33G 3.75G 4.17G 4.58G 5.00G
26"
0.43G 0.87G 1.30G 1.73G 2.17G 2.60G 3.03G 3.47G 3.90G 4.33G 4.77G 5.20G
27"
0.45G 0.90G 1.35G 1.80G 2.25G 2.70G 3.15G 3.60G 4.05G 4.50G 4.95G 5.40G
28"
0.47G 0.93G 1.40G 1.87G 2.33G 2.80G 3.27G 3.73G 4.20G 4.67G 5.13G 5.60G
29"
0.48G 0.97G 1.45G 1.93G 2.42G 2.90G 3.38G 3.87G 4.35G 4.83G 5.32G 5.80G
30"
0.50G 1.00G 1.50G 2.00G 2.50G 3.00G 3.50G 4.00G 4.50G 5.00G 5.50G 6.00G
31"
0.52G 1.03G 1.55G 2.07G 2.58G 3.10G 3.62G 4.13G 4.65G 5.17G 5.68G 6.20G
32"
0.53G 1.07G 1.60G 2.13G 2.67G 3.20G 3.73G 4.27G 4.80G 5.33G 5.87G 6.40G
33"
0.55G 1.10G 1.65G 2.20G 2.75G 3.30G 3.85G 4.40G 4.95G 5.50G 6.05G 6.60G
34"
0.57G 1.13G 1.70G 2.27G 2.83G 3.40G 3.97G 4.53G 5.10G 5.67G 6.23G 6.80G
35"
0.58G 1.17G 1.75G 2.33G 2.92G 3.50G 4.08G 4.67G 5.25G 5.83G 6.42G 7.00G
36"
0.60G 1.20G 1.80G 2.40G 3.00G 3.60G 4.20G 4.80G 5.40G 6.00G 6.60G 7.20G
37"
0.62G 1.23G 1.85G 2.47G 3.08G 3.70G 4.32G 4.93G 5.55G 6.17G 6.78G 7.40G
38"
0.63G 1.27G 1.90G 2.53G 3.17G 3.80G 4.43G 5.07G 5.70G 6.33G 6.97G 7.60G
39"
0.65G 1.30G 1.95G 2.60G 3.25G 3.90G 4.55G 5.20G 5.85G 6.50G 7.15G 7.80G
40"
0.67G 1.33G 2.00G 2.67G 3.33G 4.00G 4.67G 5.33G 6.00G 6.67G 7.33G 8.00G
41"
0.68G 1.37G 2.05G 2.73G 3.42G 4.10G 4.78G 5.47G 6.15G 6.83G 7.52G 8.20G
42"
0.70G 1.40G 2.10G 2.80G 3.50G 4.20G 4.90G 5.60G 6.30G 7.00G 7.70G 8.40G
43"
0.72G 1.43G 2.15G 2.87G 3.58G 4.30G 5.02G 5.73G 6.45G 7.17G 7.88G 8.60G
44"
0.73G 1.47G 2.20G 2.93G 3.67G 4.40G 5.13G 5.87G 6.60G 7.33G 8.07G 8.80G
45"
0.75G 1.50G 2.25G 3.00G 3.75G 4.50G 5.25G 6.00G 6.75G 7.50G 8.25G 9.00G
46"
0.77G 1.53G 2.30G 3.07G 3.83G 4.60G 5.37G 6.13G 6.90G 7.67G 8.43G 9.20G
47"
0.78G 1.57G 2.35G 3.13G 3.92G 4.70G 5.48G 6.27G 7.05G 7.83G 8.62G 9.40G
48"
0.80G 1.60G 2.40G 3.20G 4.00G 4.80G 5.60G 6.40G 7.20G 8.00G 8.80G 9.60G
49"
0.82G 1.63G 2.45G 3.27G 4.08G 4.90G 5.72G 6.53G 7.35G 8.17G 8.98G 9.80G
50"
0.83G 1.67G 2.50G 3.33G 4.17G 5.00G 5.83G 6.67G 7.50G 8.33G 9.17G 10.00G
51"
0.85G 1.70G 2.55G 3.40G 4.25G 5.10G 5.95G 6.80G 7.65G 8.50G 9.35G 10.20G
52"
0.87G 1.73G 2.60G 3.47G 4.33G 5.20G 6.07G 6.93G 7.80G 8.67G 9.53G 10.40G
53"
0.88G 1.77G 2.65G 3.53G 4.42G 5.30G 6.18G 7.07G 7.95G 8.83G 9.72G 10.60G
54"
0.90G 1.80G 2.70G 3.60G 4.50G 5.40G 6.30G 7.20G 8.10G 9.00G 9.90G 10.80G
55"
0.92G 1.83G 2.75G 3.67G 4.58G 5.50G 6.42G 7.33G 8.25G 9.17G 10.08G 11.00G
56"
0.93G 1.87G 2.80G 3.73G 4.67G 5.60G 6.53G 7.47G 8.40G 9.33G 10.27G 11.20G
57"
0.95G 1.90G 2.85G 3.80G 4.75G 5.70G 6.65G 7.60G 8.55G 9.50G 10.45G 11.40G
58"
0.97G 1.93G 2.90G 3.87G 4.83G 5.80G 6.77G 7.73G 8.70G 9.67G 10.63G 11.60G
59"
0.98G 1.97G 2.95G 3.93G 4.92G 5.90G 6.88G 7.87G 8.85G 9.83G 10.82G 11.80G
60"
1.00G 2.00G 3.00G 4.00G 5.00G 6.00G 7.00G 8.00G 9.00G 10.00G 11.00G 12.00G

Travel Time

Travel time can be calculated using the following formula:

where:

This formula assumes that there is constant acceleration during the entire journey. For example:

The players want to fly to a Jumpgate that's 100 AUs away from their current location. Their ship is only capable of travelling at 1G acceleration. They accelerate for the entire journey which takes 2 x Square root of (100 / 1) = 2 x 10 = 20 days. However, when they arrive at the jumpgate, they'll be travelling very, very fast (in the neighbourhood of 17,280 kilometres per second, or about 5.8% of the speed of light).

Generally, ships shouldn't arrive at the jumpgate travelling that fast. Suppose the players arrive at the jumpgate and find that it's in reset mode? It'd take them 40 days to slow down, turn around, come back and try again. Instead, ships usually have two legs to their journey: first, they accelerate to the half-way point of the journey, rotate the ship in space, and then start decelerating to the end-point. It's interesting to note that it takes just as long to decelerate the ship as it takes to accelerate the ship.

The players want to fly to a Jumpgate that's 100 AUs away from their current location. Their ship is only capable of travelling at 1G acceleration. They accelerate for 50 AUs, rotate the ship in space and then decelerate for 50 AUs. Each leg of the journey takes 2 x Square root of (50 / 1) = 2 x 7 = 14 days. Thus the entire journey takes 28 days.

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