Ship Design Philosophy

[Condottiere]

Spacecraft: Accommodations and Created Gravity

A. This is a series of rings, spun to emulate gravity.

B. The rings must have a radius of at least 15 metres in order to simulate a gravitational field.

C. Machinery to spin a hamster cage uses 0.1 tons for every ton of spun ring.

D. Unlike other designs, the hamster cage is usually set at right angles to the hull and installed in counter-rotating pairs, eliminating torque effects on the ship’s attitude.

E. For each full percent of the hull that is made part of the hamster cage, the cost of the hull is increased by +2%.

F. I just realized, it doesn't say how much gravity is generated, nor rotation speed.

 

[Condottiere]

Starships: Engineering and Ye Starter Jump Drive

Imperium - Alpha
. technological level eleven
. ten tonnes
. two hundred parsec tonnes
. twenty power points
. hundred diameters
. fifteen megastarbux
. manufactured for millenia, spare parts easy to obtain

Hierate - Fatcat
. technological level eleven
. twelve and a half tonnes
. two hundred parsec tonnes
. twenty power points
. hundred diameters
. eleven and a quarter megastarbux
. larger, so easier for Aslan mechanics to repair

Solomani - Venture
. technological level nine
. ten tonnes
. one hundred twenty parsec tonnes
. twelve power points
. hundred diameters
. nine megastarbux
. it worked, minimum cost

Vargr - Scooper Doopper Doo
. technological level eleven
. ten tonnes
. two hundred parsec tonnes
. twenty six power points
. hundred diameters
. eleven and a quarter megastarbux
. for all intents and purposes, power is free

Zhodani - Softlani
. technological level eleven
. ten tonnes
. two hundred parsec tonnes
. twenty power points
. hundred fifty diameters
. eleven and a quarter megastarbux
. allows enough time for planetary flight controllers to scan starship; anything exiting nearer is either a military vessel, or unauthorized

 

[Condottiere]

Spacecraft: Accommodations and Created Gravity

For comfortable artificial gravity, rotation rates below 2 RPM are ideal for most people, with 1 RPM being very comfortable, but rates up to 4-6 RPM are manageable with training, especially with larger radii (100m+) to minimize disorienting Coriolis effects, though higher rates like 10 RPM are challenging even for trained individuals, causing significant sickness. The key is balancing rotation speed (RPM) with the habitat's radius to achieve desired gravity while keeping head movements from causing nausea.

Comfortable RPM Ranges & Factors

• < 2 RPM: Generally considered very comfortable, with minimal or no adaptation needed for visitors.
• 2-4 RPM: Manageable for residents, potentially requiring some visitor training.
• 4-6 RPM: Achievable with training, but noticeable Coriolis effects (like dizziness when moving your head) are present.
• > 6 RPM: Difficult to adapt to; severe motion sickness and fatigue can occur, requiring extensive training and large radii.

The Importance of Radius (Diameter)

• Coriolis Effect: The main problem is not just RPM, but how your head moves relative to the rotation. A smaller radius means stronger Coriolis forces, causing dizziness.
• Larger Radius = Slower RPM: A bigger diameter allows for slower rotation to achieve the same gravity, reducing Coriolis effects.
  
  • Example: To get 1g (Earth gravity), a 100m radius needs about 3 RPM, while a 1km radius needs less than 1 RPM.

Key Takeaway
A rotation rate of 1-2 RPM is often cited as a sweet spot for general comfort, while larger habitats with radii over 100 meters can sustain faster, but still manageable, rotations like 3-4 RPM for trained individuals.

 

[Condottiere]

Spacecraft: Accommodations and Created Gravity


Radius (R)
156.49536822666573 meters

R ∝ A ∕ Ω 2

Angular Velocity (Ω)
2 rotations/minute

Tangential Velocity (V)
32.77631327611484 meters/second

V ∝ A ∕ Ω

Centripetal Acceleration (A)
0.7 g


Radius (R)
164.62366151391535 meters

R ∝ A ∕ Ω 2

Angular Velocity (Ω)
1.95 rotations/minute

Tangential Velocity (V)
33.61673156524599 meters/second

V ∝ A ∕ Ω

Centripetal Acceleration (A)
0.7 g

 

[MarcusIII]

A rotation rate of 1-2 RPM is often cited as a sweet spot for general comfort, while larger habitats with radii over 100 meters can sustain faster, but still manageable, rotations like 3-4 RPM for trained individuals.

Yes, around 2 RPM for a radius of approximately 224 meters for 1g to avoid those physiological problems.

 

[Condottiere]

Going by Traveller, seventy percent Terran norm has no effect, which is why I aim at that target.

Below two rotations appears to have no discernible effect on passengers, either, hence one and nineteen twentieths rotations per minute.

Which gives us one hundred sixty five metre radius.

I doubt that we can rely on High Guard for the, more or less, precise amount of material, or costs, for either hamster cages or wheels.