Weight and Balance Equipment (unfinished)

What are two scales to weight aircraft?

• Top-of-jack load cells

• Platform scales

What have mechanical or analog meter scale have largely been replaced with? (2)

• Wireless systems

• Digital indicators

What are the advantages of wireless systems or digital indicator scales have over mechanical or analog meter scales? (2)

• Easy to use

• More accurate

Out of the two scales, which is ideal for small shops?

Platform scales

How do you get an aircraft on top of scales? (2)

• Jacked and lowered

• Rolled up with ramps

What are two limiting factors of platform scales? (2)

• Tire size compatibility

• Weight capacity

What type of cells do platform scales have to sense weight?

Load cell

What is inside the load cell?

Electronic strain gauge

What do load cells with strain gauges do?

Measure weight electronically

Where would you find your platform scale readout? (2)

• Display

• Computer

How does a platform scale give it’s reading through display or computer? (2)

Via:

• Cable

• Wireless

What is the only way to level the aircraft on platform scales? (2)

Deflate:

• Tires

• Landing gear struts

Are platform scale is easy to transport?

Yes

Which scale can be powered by AC power or battery?

Platform scales

On a standard wired platform, what does the zero key do?

Resets the scale channel

On a standard wired platform, what do the display toggle between?

Total and individual channel readings

Before mounting an aircraft on a jack, what must you make sure?

That the jack is compatible for mounting

When an aircraft is mounted at the jack points, what do the transducers do?

Measure weight directly

How do top-of-jack load cells allow for easy leveling?

Jack height adjustments

What should jack cell match of the weight aircraft?

Weight

When weight an aircraft what must the level attitude be at?

Flight level attitude

What should procedures should you follow for weighing and leveling?

Manufacturer’s procedures

What is used to verify the level flight attitude?

Spirit level

Where should a spirit level be place on the aircraft?

On or against a specified place

When is a level condition indicated on a spirit level?

When the air bubble is centered between the two black lines

What is a plumb bob for?

Marks vertical alignment

What is the weight per gallon for Avgas?

6lbs/gal

What is the weight per gallon for jet fuel?

6.7 lb/gal

How do high temperature affect the weight of fuel?

Weight decreases

What is a hydrometer?

Measures fuel density for accurate weight calculations

How does a hydrometer measure fuel?

Floats at the height of fuel giving pound per gallon measurement

Where should an aircraft be weighted at?

Indoors

Why should an aircraft be measured indoors?

Winds can cause false reading

How do winds create false reading during weighting of an aircraft?

By blowing over the surface

When preparing to weigh an aircraft, what equipment is needed to hold down an airplane? (3)

• Blocks

• Chocks

• Sandbags

When preparing to weigh an aircraft, what equipment is needed for measuring? (5)

• Straightedge

• Spirit level

• Plumb bob

• Chalk line

• Measuring tape

When preparing to weigh an aircraft, what should you have to weight the aircraft? (3)

• Scale

• Hoisting equipment jacks

• Leveling equipment

When preparing to weigh an aircraft,