The Discus was the first to explore a new concept in glider design.
Previously designers had tried to provide a very wide laminar drag bucket from
min sink through to VNE (or thereabouts).
The Discus designers decided to optimise the airfoil from around min sink speed
to a reasonable
Very Interesting.
Do we know what characteristics of the airfoil lead the narrow drag bucket?
On Mon, Jul 14, 2014 at 7:38 PM, Anthony Smith
anthony.sm...@adelaide.on.net wrote:
The Discus was the first to explore a new concept in glider design.
Previously designers had tried to provide
.
Subject: Re: [Aus-soaring] Discus - was 20M gliders
Very Interesting.
Do we know what characteristics of the airfoil lead the narrow drag bucket?
On Mon, Jul 14, 2014 at 7:38 PM, Anthony Smith anthony.sm...@adelaide.on.net
mailto:anthony.sm...@adelaide.on.net wrote:
The Discus
If you read the Abbott and von Doenhoff book
Theory of Wing sections you can look at the
NACA airfoils and the low drag regions. In
general, the narrower the drag bucket the lower the drag when in the bucket.
The airfoils like on the Discus have a problem in
that as the angle of attack
, 14 July 2014 9:03 PM
To: 'Discussion of issues relating to Soaring in Australia.'
Subject: Re: [Aus-soaring] Discus - was 20M gliders
Typically an non-flapped airfoil will have curvature on the lower side of the
airfoil to help keep the airflow accelerated on the lower surface as the angle
