Home

Why Do Your Wings Have Dihedral? | Boldmethod

Leave a comment

Why Do Your Wings Have Dihedral? – Bothmethod

If you look closely at the wings on most aircraft, they’re tilted up slightly. Why would they ever do that? It’s not because you pulled too many Gs on your last flight. It’s because of a design feature called dihedral.
primary
First Off, What’s Dihedral?
Dihedral sounds like one of those words you cringed at in math class, but it’s actually pretty simple. Dihedral is the upward angle your aircraft’s wings. Here’s a great example of wing dihedral on a Boeing 777:

boeing-777-dihedral

Why Do You Need Dihedral?

It all comes down to stability. If you didn’t have dihedral, you’d spend more time keeping your wings level. Here’s why:

dihedral-stability
When you bank an airplane, the lift vector tilts in the same direction as the bank. And when that happens, your airplane starts slipping in the same direction, in this case, to the right.

The problem is, if you have a straight-wing aircraft, there’s no force that will bring the airplane back to wings-level flight without you intervening. And while that may be good for an aerobatic aircraft or fighter jet, it’s not something you want in your general aviation aircraft or airliner.
How Dihedral Fixes The Problem

When you add dihedral, you add lateral stability when your aircraft rolls left or right. Here’s how it works: let’s say you’re flying along and you accidentally bump your controls, rolling your plane to the right. When your wings have dihedral, two things happen:

1) First, your airplane starts slipping to the right. That means the relative wind is no longer approaching directly head-on to the aircraft, and instead is approaching slightly from the right. This means that there is a component of the relative wind that is acting inboard against the right wing.
dihedral-overhead
2) Second, because the relative wind has the inboard component, and because the wings are tilted up slightly, a portion of the the relative wind strikes the underside of the low wing, pushing it back up toward wings level. What’s really happening here is the low wing is flying at a higher AOA, and producing slightly more lift.
dihedral-slip-rear
The more dihedral your aircraft has, the more pronounced the effect becomes. But for most aircraft, they only have a few degrees of dihedral, which is just enough to return your wings to level during small disturbances, like turbulence, or bumping your flight controls in the cockpit.
It’s Not All Good News: Dihedral Comes At A Cost

Dihedral isn’t always good, and like almost every design factor, it comes with a cost. In this case, there are two costs: increased drag, and decreased roll rate….

Become a better pilot.
Subscribe to the Boldmethod email and get real-world flying tips and information direct to your inbox, every week.

Source: Why Do Your Wings Have Dihedral? | Boldmethod

How To Make An Awesome Soft Field Landing | Boldmethod

Leave a comment

Spring is officially here. Are you ready to start landing on soft fields again? If you’re planning to touch down on a grass or dirt strip soon, it’s time to brush up on your soft-field landing skills. Here’s what you need to be thinking about.

How Soft Field Landings Are Different

Soft field landings are pretty much the same as normal landings until you cross the runway threshold. That’s where you need to put your soft field landing technique to work.

Source: How To Make An Awesome Soft Field Landing | Boldmethod

An Opportunity to Give Back & Support Our Local Communities | Madox Air Sports The Gambia

2 Comments

We think it is important that people choose where to donate based on how they wish to help others the most. So, if you wish to help out, why not consider visiting The Gambia and take a flight to a …

Source: An Opportunity to Give Back & Support Our Local Communities | Madox Air Sports The Gambia

A Grain of Salt

Wherewith shall it be salted?

Thoughts of an infonaut

A blog of my adventures, ideas, speculations, and creative exercises.

lowzhenhui

rollercoaster

A hangover free life

Waking up to the sobering reality that booze is the problem not the solution

wanderingseer

Smile! You’re at the best WordPress.com site ever

Lunarian Thoughts

Musings from the Dark of the Moon

Matt Barton

Writer - Blogger - Content Strategist

A Stoic Remedy

An introduction to Stoicism.

Nutsrok

The humor and humanity of storytelling.

Footnotes to Plato

because all (Western) philosophy consists of a series of footnotes to Plato

Talmidimblogging

Biblical postings, Talmidim- meaning students

I'm a Writer, Yes, I Am!

Martha Ann Kennedy's Blog, Copyright 2013-2017, all rights reserved to the author/artist

lifeaswehaveneverknownit

Motivation. Photography. Make-up. Skincare. Books. Health

Feeding on Folly

... laugh a little, eat a lot!

Mountain Stoic

ἀνέχου καί ἀπέχου.

%d bloggers like this: