• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Flight Mechanic

Aircraft Mechanic School Study Supplement for Future Aviation Maintenance Technicians




  • Home
  • AMT Training
    • Basic Aviation Maintenance
    • Airframes
    • Powerplants
  • AMT Schools
  • AMT Books
  • Tip Jar
You are here: Home / Basic Aviation Maintenance / Aircraft Weight and Balance / Weight and Balance Equipment – Hydrometer
Regretfully, Flight-Mechanic will be turning out the lights after fifteen years. Google, in its infinite wisdom, has chosen to remove Flight-Mechanic from its search results (the claim is that the content on this site is spam). We appealed their decision to shut us down, to no avail.

Unfortunately, since Google has a monopoly over internet search, this means that traffic levels on the site will drop to a level that makes maintaining it uneconomic. As time progresses, we will no longer be able to maintain the server space and will remove the site from the internet. Thanks to all who have supported us over the years.

To fight back against the monopolistic practices of companies like Google, we recommend using a competing search engine such as Brave (you get the added benefit of not being spied on by Big Tech) and advocating for anti-trust legislation from your representatives.

Weight and Balance Equipment – Hydrometer

Filed Under: Aircraft Weight and Balance

When an aircraft is weighed with full fuel in the tanks, the weight of the fuel must be accounted for by mathematically subtracting it from the scale readings. To subtract it, its weight, arm, and moment must be known. Although the standard weight for aviation gasoline is 6.0 lb/gal and jet fuel is 6.7 lb/gal, these values are not exact for all conditions. On a hot day versus a cold day, these values can vary dramatically. On a hot summer day in the state of Florida, aviation gasoline checked with a hydrometer typically weighs between 5.85 and 5.9 lb/gal. If 100 gallons of fuel were involved in a calculation, using the actual weight versus the standard weight would make a difference of 10 to 15 lb.

When an aircraft is weighed with fuel in the tanks, the weight of fuel per gallon should be checked with a hydrometer. A hydrometer consists of a weighted glass tube which is sealed, with a graduated set of markings on the side of the tube. The graduated markings and their corresponding number values represent units of pounds per gallon. When placed in a flask with fuel in it, the glass tube floats at a level dependent on the density of the fuel. Where the fuel intersects the markings on the side of the tube indicates the pounds per gallon.

Flight Mechanic Recommends

Rod Machado's Private Pilot Handbook -Flight Literacy recommends Rod Machado's products because he takes what is normally dry and tedious and transforms it with his characteristic humor, helping to keep you engaged and to retain the information longer. (see all of Rod Machado's Products).
   
-->

Primary Sidebar

SEARCH FLIGHT MECHANIC

SEARCH FLIGHT MECHANIC

Aircraft Mechanic Training

Basic Aviation Maintenance

Powerplants

Airframes

Popular Posts

Aircraft Mechanic Salary

Aircraft Mechanic Schools

Aircraft Mechanic Requirements

Aircraft Flight Training

Contact Us | Terms of Use | Privacy Policy
Easy Campfire Recipes | Recipe Workbook



Copyright © 2023 Flight-Mechanic.com