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Forum: Tech Log

4th Mar 2011, 20:50

Replies: 117

jet/bird evasive action

Views: 18,551

Posted By GarageYears

Unfortunately in terms of sound level, the...

Unfortunately in terms of sound level, the distance law applies irrespective - the shaping of the source simply helps determine the initial dispersion pattern - in this case the sound would be...

Forum: Tech Log

4th Mar 2011, 15:19

Replies: 117

jet/bird evasive action

Views: 18,551

Posted By GarageYears

For a sound to audible at 3km distance.......

For a sound to audible at 3km distance.... yikes.... let's say you want the volume to be 80dB SPL at 3km, which is nice and loud but not excessive, you'd need the volume at the SOURCE (i.e. the...

Forum: Tech Log

2nd Mar 2011, 21:01

Replies: 117

jet/bird evasive action

Views: 18,551

Posted By GarageYears

Ah ha :D That was my point. Traveling at...

Ah ha :D

That was my point. Traveling at 420+ ft/sec in a very heavy airplane is going to take more than a few seconds to significantly change direction at which point you either have or have not...

Forum: Tech Log

2nd Mar 2011, 15:16

Replies: 117

jet/bird evasive action

Views: 18,551

Posted By GarageYears

Ha! Yeah - perhaps the "preview" button might...

Ha! Yeah - perhaps the "preview" button might have been prudent, but then again it's not such a bad idea...

;) - GY

Forum: Tech Log

2nd Mar 2011, 13:39

Replies: 117

jet/bird evasive action

Views: 18,551

Posted By GarageYears

So a question: At 250kt, you are traveling...

So a question:

At 250kt, you are traveling 421 ft/sec. At what distance is the "average" flock of birds visible? In other words how long have you really got to react? At a mile you've got a...

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