7.8 Rivets

Question 1

What are the most common type of rivets found in aircraft construction?

Answer 1

• solid shank
• low cost
• permanent fitting
• quicker to install nut + bolt
• can be installed using high speed installation tools

Question 2

Rivet joints are not airtight or watertight unless sealants used (true or false)?

Answer 2

True

Question 3

What are the 3 types of rivet joints used?

Answer 3

• lap joints
• flush joints
• joggle joints

Question 4

What are the factors that govern the strength of a joint?

Answer 4

• material specification
• rivet specification
• rivet spacing

Question 5

Explain lap joints?

Answer 5

• skins are not on the same plane, but are stacked
• not aerodynamically smooth

Question 6

Explain flush joints?

Answer 6

• obtain aerodynamic smoothness between 2 skins
• skins both riveted to the same substructure

Question 7

Explain a joggle joint?

Answer 7

• combination of flush + lap joint

Question 8

Explain pitch?

Answer 8

• distance from centre of one fastener to the next centre fastener hole

Question 9

Explain edge margin/land and edge distance?

Answer 9

• distance from centre of fastener hole to nearest edge
• general rule of thumb is 2D - 2.5D

Question 10

Explain spacing?

Answer 10

• distance between 2 fasteners (taken from centre of fasteners)
• approx 4 to 5D

Question 11

3 methods of dimpling?

Answer 11

• coin dimpling
• radius dimpling
• hot dimpling

Question 12

What are cleco fasteners?

Answer 12

• temp fasteners

Question 13

What are cleco wing nut fastener used for?

Answer 13

• temp fasten metal sheets when higher clamp up pressure is required