## Wildland Fire Friction Loss Calculator

Hose Size (inches) | Flow Rate (GPM) | Nozzle Type | Friction Loss (psi per 100 feet) |
---|---|---|---|

1 | 50 | Solid Bore | 3.0 |

1 | 100 | Solid Bore | 11.0 |

1.5 | 50 | Solid Bore | 0.9 |

1.5 | 100 | Solid Bore | 3.6 |

1.5 | 50 | Fog | 15.0 |

1.5 | 100 | Fog | 60.0 |

1.75 | 50 | Solid Bore | 1.5 |

1.75 | 100 | Solid Bore | 6.0 |

1.75 | 50 | Fog | 16.0 |

1.75 | 100 | Fog | 65.0 |

2.5 | 50 | Solid Bore | 0.3 |

2.5 | 100 | Solid Bore | 1.0 |

2.5 | 50 | Fog | 10.0 |

2.5 | 100 | Fog | 40.0 |

## FAQs

**How do you calculate friction loss in a fire?** Friction loss in a fire can be calculated using the formula that takes into account factors such as the length and diameter of the hose, flow rate, and type of nozzle. The formula for calculating friction loss in a fire hose is commonly known as the “Darcy-Weisbach equation.”

**What is the formula for calculating friction loss?** The Darcy-Weisbach equation for calculating friction loss is: Friction Loss = (C * L * Q^2) / (d^5)

Where: C = Friction loss coefficient L = Length of the hose Q = Flow rate (gallons per minute, GPM) d = Diameter of the hose (inches)

**What is the friction loss for 1 3/4-inch fire hose?** The friction loss for a 1 3/4-inch fire hose depends on the flow rate, hose length, and other factors. It can be calculated using the Darcy-Weisbach equation mentioned above.

**What is the friction loss of a 5-inch hose?** The friction loss of a 5-inch hose depends on the flow rate, hose length, and other factors. It can be calculated using the Darcy-Weisbach equation mentioned above.

**What is a general rule of friction loss?** A general rule of friction loss is that as the flow rate and hose length increase, the friction loss also increases. Larger hose diameters generally result in lower friction losses.

**How to do hand method friction loss?** The hand method for calculating friction loss involves using pre-determined friction loss coefficients for various hose sizes, flow rates, and hose lengths. Firefighters can use reference charts or tables to find the appropriate friction loss coefficient and calculate the friction loss manually.

**How do you calculate friction on a calculator?** To calculate friction loss using the Darcy-Weisbach equation, you can input the values of the friction loss coefficient (C), hose length (L), flow rate (Q), and hose diameter (d) into a calculator and use the formula to obtain the friction loss.

**What is the formula of loss equation?** The formula for the loss equation, specifically for friction loss in a fire hose, is the Darcy-Weisbach equation mentioned earlier.

**What is friction calculator?** A friction calculator is a tool used to compute friction loss in different scenarios, such as in firefighting operations involving hoses and nozzles of various sizes and flow rates.

**What are the 4 factors that determine friction loss?** The four factors that determine friction loss in a fire hose are:

- Friction loss coefficient (C)
- Length of the hose (L)
- Flow rate (Q)
- Diameter of the hose (d)

**What is the flow rate for a 1 3/4-inch fire hose?** The flow rate for a 1 3/4-inch fire hose can vary depending on the nozzle type and pressure. Common flow rates for this hose size range from 95 to 150 gallons per minute (GPM).

**What is the friction loss for 2.5-inch fire hose?** The friction loss for a 2.5-inch fire hose depends on the flow rate, hose length, and other factors. It can be calculated using the Darcy-Weisbach equation mentioned above.

**What is the friction loss of a 4-inch hose?** The friction loss of a 4-inch hose depends on the flow rate, hose length, and other factors. It can be calculated using the Darcy-Weisbach equation mentioned above.

**How many GPM can a 5-inch hose flow?** The flow rate of a 5-inch hose can vary depending on the nozzle type and pressure. Common flow rates for this hose size range from 400 to 800 gallons per minute (GPM) or more.

**What is the common friction loss rate?** The common friction loss rate for fire hoses can vary depending on the hose size, flow rate, and length. It is generally measured in pounds per square inch (psi) per 100 feet of hose.

**What is the acceptable friction loss in pipe?** The acceptable friction loss in a fire hose is typically limited to a certain percentage of the total pump pressure. A common rule of thumb is to keep the friction loss below 10% of the total pump pressure.

**What are the 3 laws of friction?** The three laws of friction are:

- The force of friction is proportional to the normal force between two surfaces.
- The force of friction is independent of the apparent area of contact.
- The force of friction is independent of the relative velocity between two surfaces (Coulomb’s law of friction).

**What is the formula for GPM for a fire hose?** The formula to calculate the flow rate (GPM) for a fire hose is: GPM = (Q * d^2) / (4 * 29.83)

Where: Q = Flow rate (gallons per minute) d = Diameter of the hose (inches)

**What factor increases friction loss in fire hose?** The factors that increase friction loss in a fire hose are higher flow rates, longer hose lengths, and smaller hose diameters.

**What is the rule of thumb for fire pumps?** A common rule of thumb for fire pumps is to maintain a pump pressure of around 150 psi for every floor of a building.

**What PSI is a master stream?** A master stream refers to a large-caliber fire hose nozzle that delivers high flow rates. The pressure for a master stream can range from 80 to 200 psi or more, depending on the specific nozzle and application.

**What is friction and how is it measured?** Friction is a force that opposes the relative motion or tendency of such motion between two surfaces in contact. It is measured in units of force, such as pounds (lb) or newtons (N).

**What is the math of loss function?** The loss function in mathematics represents the discrepancy between the predicted output of a model and the actual target value. It is commonly used in machine learning algorithms to optimize model performance.

**What is the formula of loss percent with example?** The formula to calculate loss percentage is: Loss Percentage = (Loss / Original Value) * 100

For example, if the original value is $100 and the loss is $20, the loss percentage would be: Loss Percentage = (20 / 100) * 100 = 20%

**What is a loss function in math?** In mathematics and statistics, a loss function is a function that measures the discrepancy between predicted values and actual target values. It is used as a part of optimization algorithms in various fields, including machine learning and data analysis.

**How do you find the frictional force on a slope?** To find the frictional force on a slope, you need to consider the coefficient of friction between the two surfaces in contact and the normal force acting on the object due to gravity.

**What unit is friction measured in?** Friction is measured in units of force, such as pounds (lb) or newtons (N).

**What unit is friction value?** Friction is a dimensionless quantity and does not have a unit. The value of friction is represented by a coefficient of friction (Î¼) that has no unit.

**What does friction loss depend on?** Friction loss depends on factors such as the nature of the surfaces in contact, the normal force between the surfaces, and the relative velocity between them.

**Does friction affect flow rate?** Yes, friction affects flow rate in fluid systems. Frictional resistance in hoses and pipes can lead to pressure drop and a decrease in flow rate.

**What two factors determine the amount of friction?** The two factors that determine the amount of friction between two surfaces are the nature of the surfaces and the normal force between them.

**What is the maximum GPM for a 4-inch fire hose?** The maximum flow rate (GPM) for a 4-inch fire hose can vary depending on the nozzle type and pressure. It is typically around 400 to 600 GPM.

**How many gallons per minute can flow through a 3-inch pipe?** The flow rate (GPM) through a 3-inch pipe can vary depending on the pressure and other factors. It can range from 200 to 400 GPM or more.

**How many GPM can a 3/4-inch garden hose flow?** The flow rate (GPM) of a 3/4-inch garden hose can vary depending on the water pressure and hose length. It is typically around 5 to 10 GPM.

**What is the friction loss per 50 feet of hose?** The friction loss per 50 feet of hose can vary depending on the hose size, flow rate, and other factors. It can be calculated using the Darcy-Weisbach equation.

**What is the flow rate of a 1.5-inch fire hose?** The flow rate of a 1.5-inch fire hose can vary depending on the nozzle type and pressure. Common flow rates for this hose size range from 60 to 95 GPM.

**How much can a 2-inch fire hose flow?** The flow rate of a 2-inch fire hose can vary depending on the nozzle type and pressure. Common flow rates for this hose size range from 95 to 125 GPM.

**What is the pressure loss for 100 feet of hose?** The pressure loss for 100 feet of hose can be calculated using the Darcy-Weisbach equation or by using friction loss charts and tables for different hose sizes and flow rates.

**How much psi do you lose per foot of hose?** The amount of psi lost per foot of hose depends on the hose size, flow rate, and other factors. It can be calculated using the Darcy-Weisbach equation.

**What is the flow rate for 3/8-inch tubing?** The flow rate for 3/8-inch tubing can vary depending on the water pressure and tubing length. It is typically around 2 to 5 GPM.

**How many gallons is 100 feet of 5-inch hose?** The number of gallons in 100 feet of 5-inch hose depends on the hose’s internal volume, which can vary depending on the hose construction and materials used.

**How many GPM is 100 PSI?** The flow rate (GPM) at 100 PSI depends on the nozzle size and other factors. It can range from 50 to 100 GPM or more.

**Does hose length affect GPM?** Yes, hose length can affect the flow rate (GPM) due to friction loss. Longer hoses can result in higher friction loss and reduced flow rates.

**What is the formula for friction loss in tubing?** The formula for friction loss in tubing is the Darcy-Weisbach equation, which was mentioned earlier.

**What is a normal amount of friction?** The amount of friction between two surfaces can vary widely depending on the materials and conditions. Friction is a common and necessary force in everyday interactions.

**What is the elevation loss in a fire hose?** Elevation loss in a fire hose occurs when water is pumped to a higher elevation, resulting in an increase in pressure and energy loss due to gravity.

**How much flow is lost at a 90-degree elbow?** The flow loss at a 90-degree elbow can vary depending on the size of the elbow, flow rate, and other factors. It can be significant and should be considered in fire hose layouts.

**How do you calculate fire hose friction loss?** Fire hose friction loss can be calculated using the Darcy-Weisbach equation, as mentioned earlier, or by using reference charts and tables specific to different hose sizes and flow rates.

**What is the friction loss on 1 3/4-inch fire hose?** The friction loss on a 1 3/4-inch fire hose can vary depending on the flow rate, hose length, and other factors. It can be calculated using the Darcy-Weisbach equation.

**What are the 3 most common types of friction?** The three most common types of friction are static friction, kinetic friction, and rolling friction.

**What is the 4 types of friction?** The four types of friction are static friction, kinetic friction, rolling friction, and fluid friction.

**How to reduce friction?** Friction can be reduced by using lubricants, smoother surfaces, and reducing the normal force between two surfaces.

**How many GPM is a 3-inch fire hose?** The flow rate (GPM) of a 3-inch fire hose can vary depending on the nozzle type and pressure. Common flow rates for this hose size range from 200 to 400 GPM.

**How do you calculate fire flow in NFPA?** NFPA 14, Standard for the Installation of Standpipe and Hose Systems, provides guidelines for calculating fire flow requirements based on building occupancy, hazard classification, and other factors.

**How many GPM is fire fighting?** The flow rate (GPM) for firefighting operations can vary widely depending on the fire size, building type, and firefighting strategy. It can range from several hundred to thousands of GPM.

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