How do planes discharge static electricity when refuelling?

Click For Summary

Discussion Overview

The discussion centers on how aircraft discharge static electricity during refueling, particularly focusing on the mechanisms involved and the safety measures taken to prevent sparks that could ignite fuel. The scope includes technical explanations and practical applications related to aviation safety.

Discussion Character

  • Technical explanation, Experimental/applied, Debate/contested

Main Points Raised

  • Some participants note that planes have static dischargers (static wicks) on the wings to manage static electricity during flight.
  • Others propose that earthing straps are used to connect the aircraft to the ground before fuel connections are made to prevent static discharge during refueling.
  • A participant shares an experience with grounding straps used for cruise missiles, highlighting their importance in preventing static discharge in aviation maintenance contexts.
  • One participant humorously emphasizes the importance of ensuring grounding before maintenance, indicating a shared understanding of safety protocols.
  • Another participant mentions finding images of earth strap reels used in refueling operations, suggesting a practical reference to the discussion.

Areas of Agreement / Disagreement

Participants generally agree on the use of earthing straps as a safety measure during refueling, but there is no consensus on the specifics of how static electricity is managed in different aircraft designs, particularly those with electrically resistive materials.

Contextual Notes

The discussion does not resolve the technical details regarding the effectiveness of different grounding methods or the specific mechanisms of static discharge in various aircraft materials.

Who May Find This Useful

Aviation professionals, safety engineers, and individuals interested in aircraft maintenance and refueling procedures may find this discussion relevant.

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