# Online Calculators

## Appendix 1b

## Spacecraft Design

### Structure

**TransHab Module Calculator**: Calculates the dimensions of an inflatable TransHab crew module. By **Rob Davidoff**.

**Structural Mass Calculator**: Estimates the structural mass of a spacecraft, using the method found **here**. By Eric Rozier.

### Rocket Engine

**Thruster Calculator**: Simulates spacecraft thrust, given rocket engine type and mission profile. By Eric Rozier.

**Delta-V Calculator**: Given the rocket's wet mass, dry mass, and specific impulse/exhaust velocity calculate the rocket's delta-V. By Joseph J. Strout.

**The Rocket Equation**: Calculates the delta-V equation. Given any three of the values it calculates the value of the fourth. By Trent Waddington.

### Heat Radiator

**Droplet Radiator Calculator**: Given a droplet radiator design, calculate required area to dissapate desired waste heat level. By Eric Rozier.

**Coolant Calculator**: Given a radiator's coolant type and amount, simulate the radiator system. By Eric Rozier.

### Misc

**Mission Calculator**: Given crew size and mission length, calculate the amount of required consumables. By Eric Rozier.

**Relativistic Star Ship Calculator**: Calculates times to reach distant points by a relativisitic star ship, accelerating continuously. By Stephen R. Schmitt.

**SpinCalc**: Calculate the parameters of a centrifugal artificial gravity system. By Theodore W. Hall.

## Weapons

### Nuclear Weapons

**Nuclear Weapon Calculator**: Models the effect of various weapon sizes on user selected armor samples. By Eric Rozier.

**Nuclear Weapon Effects Calculator**: For various nuclear weapon yields, calculates the thermal radius, air blast radius, ionizing radiation radius, and other values. By Michael Wong

**Nuclear Bomb Effects Computer**: For various nuclear weapon yields, calculates blast and fallout values, and displays them on a pseudo-slide rule. By John Walker

### Laser Weapons

**Laser Weapon Calculator**: Models the effect of various types of lasers on user selected armor samples. By Eric Rozier.

**Pulse Laser Calculator**: Estimates the effects of pulsed laser blasts on a target. By Luke Campbell.

**Beam Laser Calculator**: Estimates the effects of a beam laser on a target. By Luke Campbell.

### Kinetic Weapons

**Kinetic Weapon Calculator**: Models the effect of various types of projectile weapons on user selected armor samples. By Eric Rozier.

### Point Defense

**Point Defense Hit Probabilities - Kinetic CIWS**: Estimates hit probabilities of kinetic point defence on various hostile missile sizes. By Eric Rozier.

**Point Defense Hit Probabilities - Missile CIWS**: Estimates hit probabilities of missile based point defence on various hostile missile sizes. By Eric Rozier.

## Asteroid Strike

**Earth Impact Effects Program**: Estimates the effects of an asteroid striking Earth. By Robert Marcus, H. Jay Melosh, and Gareth Collins.

**Impact Calculator**: Estimates the effects of an asteroid striking Earth. Includes Google Maps so you can plot the size of the crater. By Edward Gomez and Jon Yardley.

**Impact Calculator**: Estimates the effects of identical asteroids striking Earth and Luna.

**Solar System Collisions**: Estimates the effects of an asteroids striking the planet of your choice. By Dr. Douglas P. Hamilton