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Old 02-05-2017, 08:56 PM   #38 (permalink)
kach22i
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Nice graphics Chaz, what program?

To answer Stubby's question, when I looked into this it included aircraft canopies and what I called equipment blisters.

Aerohead then posted information on these conditions for me/us. I dont know the specific thread but you can do a seach in the fourm to find it.

The shape was almost template matching, but stretched out in the front, not as blubous.

I recall doing a speed boat example if that helps.

EDIT: I looked up some old threads which explored the canopy and speed boat topics.

Canopy drag
http://ecomodder.com/forum/showthrea...rag-28206.html


And in another forum I posted a lot of related ground plane graphics, it's a boat forum so I was hoping for a different perspective there - I guess.

Teardrop Ratios - above deck
http://www.boatdesign.net/forums/hyd...eck-47575.html


This was a good example of "outside perspective" from that boat thread:
http://www.boatdesign.net/forums/hyd...k-47575-2.html
Quote:
Originally Posted by DCockey View Post
The surface of the water a boat is traveling through has a similar effect on the flow of air around the boat as the effect the ground/road surface has on the air flow around a car.

But it is not because of an "air pressure wave".

Let's start with the air flow around a car. If the car is somehow moving thought the air a considerable height above the ground then the air can flow in all directions around the car. But if the car is on the ground then the air cannot flow through the ground so the air flow is affected. Close to the ground the flow will be close to tangent to the ground. This will affect the air flow around the car. More air will have to flow around the sides of the car and over the top of the car.

Now consider a boat moving through the water. The surface of the water will have waves and not be flat like the ground. The size and shape of the waves will depend on the speed, size and shape of the boat. (The water surface may also have waves due to ambient conditions.) The air cannot flow through the water. Close to the water the flow will be tangent to the surface of the water. This will affect the air flow around the boat similar to the effect the ground has on the air flow around a car.
I think when we first look into these topics we assume what applies to aircraft also applies to cars, boats and maybe even hovercraft. However there are some differences regarding the affects of the ground plane or water plane.

Huge topic, I don't think one can do wrong getting started on any one of them, just don't mix and match expecting similar results/outcomes.
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Last edited by kach22i; 02-06-2017 at 09:06 AM..
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