How Its Made - Wooden Airplane Propellers

The propeller dates back to 149_ when Leonardo Da Vinci sketched out the concept helical screw that could propel a machine vertically into the sky.

• 1494

• 1493

Wood propellers start out as a laminated block of _ _ _ _ _ wood. (5 letters)

(a)  

Lamination is a process where....

• you sand and buff the wood to make the shape you desire

• you have several layers of wood that are glued together

• you sketch/draw on the wood to prep for the cutting

TRUE or FALSE: Depending on the airplane model, workers select a pattern that is between 1or 2 meters long. They lay this pattern over the maple block and mark the one-inch center hole.

• TRUE

• FALSE

What is used to create the profile of the propeller (shape)?

• bandsaw

• computer-guided milling machine

• spokeshave

What are the propeller specifications that are required once they have completed the overall sanding of the wooden propeller?

• Diameter, pitch and manufacturer ID

• Pitch, flight directions symbols and manfacturer ID

• Diameter, pitch, flight direction symbols and manufacturer ID

Once the propeller specifications are complete, the worker must...

• they spray on a coat of clear enamel to seal the wood

• inspect the propeller then perform a final sanding and balance

• apply a safety colour to the propeller tips to make it visible while it's spinning

Which of the following is the correct order of the final steps of "How Its Made Wooden Airplane Propellers"?

• 2 final protective coats of clear enamel, 24 hours of drying time and the propellers are ready.

• 1 final protective coat of clear enamel, 24 hours of drying time and the propellers are ready.