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IL-2 Sturmovik: Cliffs of Dover Latest instalment in the acclaimed IL-2 Sturmovik series from award-winning developer Maddox Games.

 
 
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Old 09-11-2011, 05:37 PM
Blackdog_kt Blackdog_kt is offline
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What you guys miss is the effect of wind on the wings.

It's perfectly possible for a heavy aircraft to spin in a crosswind if the wind is fast enough, because the wind generates lift that acts against its weight. A 6000lbs Spitfire is not a concentrated 6000lb brick, it has forces acting on a wide range of its body during a wind situation and we all know from basic newtonian physics about the torque effect: the same force can produce more rotation if it's applied further out from the center of rotation.

There's so many variables here that trying to convince people if it's a bug or not seems a bit simplistic. If enough lift is generated by the Spit's wing, then during a crosswind the side meeting the wind will experience a "lighten up" effect due to the produced lift, if the edges of the wing create enough drag it will result in increased torque, add the effects of the tail fin and non-lockable tailwheels and you have a 6000lbs aircraft spinning on the ground.

So, is it accurate? We don't know because we don't have the numbers to judge.

Is it impossible? Definitely not, it's perfectly possible.

Case in point, take a look at some videos of bushplanes, floatplanes, etc on youtube. Why do you think they all have tie-down attachment points if weight alone is enough to keep them immobile?

Well, it's not enough and since they also have high-lift wings by design and sizable control surfaces, wings and fins for stability and ease of maneuvering at low speeds while getting in and out of improvised fields and lakes, it's quite possible to cause damage by leaving them unattended during a windy day.

A good gust of wind and your shiny piper cub can almost flip over on its back if it's not tied down and the controls are not locked into place. That's not only because it's light, tie-downs are common on the majority of civil/general aviation aircraft regardless of weight, including heavier designs like DeHavilland Beavers/Otters and so on. These might not outright flip over, but a high-lift wing and a gust of wind could easily cause them to stand on one gear/float and come smashing down again once the gust subsides. All sorts of things can go wrong depending on a host of variables and specific aircraft design, from oil leaking out of the filler cap to fuel getting disturbed and bubbly in a half-full tank, to striking a prop-blade into the ground, to stressing a float mount, to a wingtip scraping against the ground, etc etc.

The Spit might or might not be heavier than some of these GA aircraft but we all know its wing design is focused on optimal lift generation, so parallels can definitely be drawn.

Weight is just the tip of the iceberg in all the variables concerned here and making a judgement of whether it's a bug or not is impossible without having the relevant aerodynamic data for a spitfire, much less trying to convince others about our opinion.

So, in closing, i have no way to know if what's happening with the in-game Spit is accurate, but it's basic physics to understand that it's certainly possible if certain aerodynamic properties meet some criteria. Until we get numbers an accurate judgement is impossible and the debating of it futile. Just my 2c and if anybody disagrees with it i don't mind at all.
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