How do planes discharge static electricity when refuelling?

Click For Summary
SUMMARY

Planes discharge static electricity during refueling using earthing straps connected before fuel connections are made. Static dischargers, also known as static wicks, are installed on the trailing edges of wings to manage static electricity during flight. The discussion highlights the importance of grounding to prevent sparks that could ignite fuel vapors, particularly in aircraft with electrically resistive materials like fiberglass. Proper grounding practices are essential in both aviation and military contexts, as emphasized by the mention of cruise missiles requiring grounding before maintenance.

PREREQUISITES
  • Understanding of static electricity and its effects in aviation.
  • Knowledge of aircraft grounding techniques and safety protocols.
  • Familiarity with static dischargers (static wicks) and their function.
  • Awareness of the materials used in aircraft construction, such as fiberglass.
NEXT STEPS
  • Research the design and function of static dischargers (static wicks) in aviation.
  • Learn about grounding techniques and safety measures during aircraft refueling.
  • Explore the properties of electrically resistive materials used in aircraft wings.
  • Investigate the maintenance protocols for military equipment, including cruise missiles.
USEFUL FOR

Aerospace engineers, aviation safety professionals, and maintenance personnel involved in aircraft operations and refueling procedures will benefit from this discussion.

says
Messages
585
Reaction score
12
I know that planes have static dischargers (static wicks) on the trailing edges of wings to discharge static electricity when they are flying.

I was wondering how a plane, let's say with electrically resistive fibreglass wings, would discharge this without having sparks ignite while it's stationary and being refuelled?
 
Physics news on Phys.org
says said:
I know that planes have static dischargers (static wicks) on the trailing edges of wings to discharge static electricity when they are flying.

I was wondering how a plane, let's say with electrically resistive fibreglass wings, would discharge this without having sparks ignite while it's stationary and being refuelled?
they use earthing straps that are connected before fuel connections are made

google is your friend. there are lots of links
 
Last edited by a moderator:
davenn said:
they use earthing straps that are connected before fuel connections are made

Indeed. We used similar straps keep our cruise missiles grounded when not uploaded to an aircraft. One of the first steps of the prior-to-maintenance checklist is Check to ensure the missile is grounded.

I don't know how many grounding cables I nearly tripped over in my career... we'd have those things strung all over the place when the maintenance bays were full of cruise missiles awaiting maintenance.
 
  • Like
Likes   Reactions: davenn, FactChecker and berkeman
Drakkith said:
Check to ensure the missile is grounded.
Wiser words have never been spoken...
 
  • Like
Likes   Reactions: Drakkith
Google finds picture of Earth strap reel on refueling bowser..

groundingprocesstruckview_10662832.jpg
 

Similar threads

  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 14 ·
Replies
14
Views
5K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
Replies
5
Views
2K
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 73 ·
3
Replies
73
Views
6K