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Unstable flight model?


Fred00

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Interesting, I wouldn't really expect the Viggen to "feel" like other aircrafts based on the canards. Would it be correct to assume they would move the nose around more than other aircrafts?

 

Not really. In this case it's related more to the center of gravity and stability margins of the airframe.

 

The Viggen is relatively nose heavy, which grants good stability/departure resistance at the cost of performance and large trim changes with airspeed.

DCS modules are built up to a spec, not down to a schedule.

 

In order to utilize a system to your advantage, you must know how it works.

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Because the Viggen, like most aircraft, lacks auto trim, you must re trim the aircraft with changes in airspeed. (Also stay below 0.9M, trim gets weird above that)

 

Here's a little trick I figured out to get around the very slow pitch trim hat:

 

When you level off, click the ATT hold autopilot on for a few seconds and center your stick. Once the plane stabilizes, disengage ATT hold and presto! Perfectly trimmed for 1G flight at that airspeed.

 

Nice tip Pocketsized! i'll try that!

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