And despite the aerodynamic interactions of these propeller blades, they're able to maintain stable flight.

The flat sharp edges are like knife blades.

and He made them like green blades devoured.

and He made them like green blades devoured.

And grains in the blades, and fragrant plants.

And grains in the blades, and fragrant plants.

You can measure the aerodynamic forces it's creating.

WK In fact, a design of the windmill that was in the book, it has got four ah three blades, and mine has got four blades.

Also, we see how we measure the aerodynamic efficiency.

WK I made four blades, just because I want to increase power.

Only if you control and regulate it, you will get that aerodynamic efficiency.

They use no chainsaws or anything it's entirely just blades, and an incredibly efficient process.

DH Grab the blades in mid air, land right there in a pool of blood ...

We had knowledge about the electromechanical efficiency and then we can calculate the aerodynamic efficiency.

64 meter wingspan to carry one pilot, the batteries, flies slowly enough with the aerodynamic efficiency.

Actually, we will take a second to prove this could be fake that the blades are indeed razor sharp.

You could just hang it as a bed sheet, but again, the computation of all the physics gives you the aerodynamic shape.

I loved Johnny English approaching a helicopter while dressed in a medieval suit of armour and the rotor blades briefly clanging against his helmet.

The hardest part of the mission is that the probe just has one chance before entering the Martian atmosphere for aerodynamic shape and parachute deceleration.

The only thing I did was, I made it possible for them to turn those blades so you could sail this thing in the canal, because I love sailing.

And we tackle this problem by building giant, dynamically scaled model robot insects that would flap in giant pools of mineral oil where we could study the aerodynamic forces.

The way you normally build a system right now is you have a tube stack that has to be launched from the ground, and resist all kinds of aerodynamic forces.

On the 11th day of the month, 42 wind turbine blades produced by Guodian Group was prepared to be shipped and exported to South Africa from the wharf of Lianyungang Port.

In 1992, a solid propellant rocket launched a winged vehicle into the upper atmosphere from a balloon floating at high altitude. It performed the first Japanese controlled aerodynamic re entry flight.

You put these two things together, the net result is that all side forces on the glass are small and are mainly dominated by aerodynamic effects, which at these speeds are negligible.

If we were to eliminate every single bit of technology in the world today and I mean everything, from blades to scrapers to cloth we as a species would not live very long.

The DOLILU II system, which will incorporate the main engine control tables, solid rocket trim data, and aerodynamic control data on the day of launch, will further optimize the ascent trajectory of the Shuttle.

The core and the most difficult part of the Mars exploration mission are the aerodynamic shape and parachute deceleration process after the probe enters Martian atmosphere. There is just one chance to ensure success.

So we looked at the birds, and we tried to make a model that is powerful, ultralight, and it must have excellent aerodynamic qualities that would fly by its own and only by flapping its wings.

Question 1. Can an aerospace object be defined as an object which is capable both of travelling through outer space and of using its aerodynamic properties to remain in airspace for a certain period of time?

Are there special procedures for aerospace objects, considering the diversity of their functional characteristics, the aerodynamic properties and space technologies used, and their design features, or should a single or unified regime be developed for such objects?

Are there special procedures for aerospace objects, considering the diversity of their functional characteristics, the aerodynamic properties and space technologies used and their design features, or should a single or unified regime be developed for such objects?

These crude tools were around for thousands of centuries, until around 1.4 million years ago when Homo erectus started shaping single, thin stone blades, sometimes rounded ovals, but often in what are to our eyes an arresting, symmetrical pointed leaf or teardrop form.

Janine Benyus has a message for inventors When solving a design problem, look to nature first. There you'll find inspired designs for making things waterproof, aerodynamic, solar powered and more. Here she reveals dozens of new products that take their cue from nature with spectacular results.

And I figured, It's all over now, and she looks up and she says, Well, she's still watching these guys go she says, I can't ride a bike, no, she says, I can't use a skateboard, and I've never used roller blades, she knew them by name she says, And it's been 50 years since I rode a bicycle.

Well, in order to fly, just as in a human aircraft, you need wings that can generate sufficient aerodynamic forces, you need an engine sufficient to generate the power required for flight, and you need a controller, and in the first human aircraft, the controller was basically the brain of Orville and Wilbur sitting in the cockpit.

For example, elongated stone blades are found not only at Neanderthal sites in Europe and the Near East, but also at sites inhabited by Moderns in the Near East and Africa since at least 100,000 years ago. Blade technologies then disappeared and reappeared cyclically in these areas, and in some regions, such as Australia, they only appeared a few thousand years ago.

But attached to the base of the wing is a set of little, tiny control muscles that are not very powerful at all, but they're very fast, and they're able to reconfigure the hinge of the wing on a stroke by stroke basis, and this is what enables the fly to change its wing and generate the changes in aerodynamic forces which change its flight trajectory.