Rules Of Thumb
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Joined: Jul 2004
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From: Australia
Rules Of Thumb
This thread is a chance for all the experienced pilots out there to share their wisdom.
Ie 6 degree lead for 90 degree turn to intercept VOR when doing 120kts, 10 precent of groundspeed to turn onto an arc etc etc.
Bring on the tips.
Ie 6 degree lead for 90 degree turn to intercept VOR when doing 120kts, 10 precent of groundspeed to turn onto an arc etc etc.
Bring on the tips.
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Thread Starter
Joined: Jul 2004
Posts: 18
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From: Australia
Mattyj, 1 percent is correct - whoops!
Half your groundspeed as a decimal also works well ie Doing 140kts 140/2 = 70 which becomes 0.7 so begin turning onto a 10 mile arc at 10.7 DME. Gets less accurate with increased speed.
Cheers.
Half your groundspeed as a decimal also works well ie Doing 140kts 140/2 = 70 which becomes 0.7 so begin turning onto a 10 mile arc at 10.7 DME. Gets less accurate with increased speed.
Cheers.
Joined: Sep 2004
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From: over the rainbow
Cow Met.
Using other clues to find the wind
Seagulls stand facing into the wind, and, supposedly, cows always point their behinds into the wind
Cows, when they are standing or resting, usually face away from the wind,especially if it is raining or snowing, to minimize getting their faces wet and cold. (When they graze, they prefer facing into the wind, as the breeze aims the tops of the grass towards them, although they often graze in a random pattern).
Seagulls stand facing into the wind, and, supposedly, cows always point their behinds into the wind
Cows, when they are standing or resting, usually face away from the wind,especially if it is raining or snowing, to minimize getting their faces wet and cold. (When they graze, they prefer facing into the wind, as the breeze aims the tops of the grass towards them, although they often graze in a random pattern).
Joined: Dec 2004
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From: Pacific Ocean
"rule of thumb" goes back to the turn of the 19th century when a husband was leagaly allowed to beat his own wife with a stick no greater in width, than his own thumb.
Go figure
Go figure
Last edited by Jawz; 24th May 2005 at 10:24.
Joined: Jun 2004
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From: Australia
When you're over the ocean at night and want to know the swell direction for a possible ditching, tilt the radar down until a 'banana shaped' fuzzy return is indicated. That 'banana' is approximately the orientation of the swell, as the face / back of the swell is the most radar reflective part of the swell.
Regards,
Old Smokey
Regards,
Old Smokey
Joined: Nov 1999
Posts: 245
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From: Somewhere new.....
mattyj and vne,
Its not 10% nor 1%, however the example that you give using 140kts is correct, that makes it 0.5%.
Ie, With 140kt groundspeed 0.5% would be 0.7 DME, hence your lead distance for the arc. This works regardless of the angle of intercept. If your approaching the arc at an oblique angle your groundspeed will be less hence the lead in distance is less. Becareful the groundspeed has to be read off the DME not a GPS.
Hope this helps.
Its not 10% nor 1%, however the example that you give using 140kts is correct, that makes it 0.5%.
Ie, With 140kt groundspeed 0.5% would be 0.7 DME, hence your lead distance for the arc. This works regardless of the angle of intercept. If your approaching the arc at an oblique angle your groundspeed will be less hence the lead in distance is less. Becareful the groundspeed has to be read off the DME not a GPS.
Hope this helps.
