FredT From United Kingdom, joined Feb 2002, 2185 posts, RR: 26 Reply 3, posted (11 years 6 months 3 weeks 4 days 7 hours ago) and read 5429 times:
By using a GPS or an INS as suggested, or by taking your TAS and heading, adding the known wind and calculating the length of the resulting velocity vector.
How to find out which way the wind is blowing? By using a hight-tech gadget called a 'windsock'.
If you're up in the air, check your drift.
In the good old days they had an instrument specifically intended to check the drift angle. Checking the drift angle on two different headings would enable you to calculate the wind speed and direction.
I thought I was doing good trying to avoid those airport hotels... and look at me now.
PPGMD From United States of America, joined Sep 2001, 2453 posts, RR: 0 Reply 4, posted (11 years 6 months 3 weeks 4 days 5 hours ago) and read 5413 times:
SuperCub speeding up, how true. I was once going to fly the cub inland a little until I called for briefing, 15kts direct headwind, that would cut down my cruise speed by 25%, oh well faster to drive, but then again with Orlando Traffic, maybe that 45kt cruise ain't that bad.
Bio15 From Colombia, joined Mar 2001, 1089 posts, RR: 7 Reply 5, posted (11 years 6 months 3 weeks 4 days 3 hours ago) and read 5398 times:
1)FredT's method is a good one, not so easy as the GPS. You can calculate your drift also using a VOR. If you're heading straight to it, you take a reference distance point, and then let yourself drift for a while and then take another reference point. You will be able to calculate the ground distance flown by the change in radial from the VOR and your change in distance to the VOR (which is not always the same as the ground distance flown). You calculate the resulting vector by knowing it is the addition of your vector with respect to the air (airspeed and heading) plus the vector of the wind (speed and heading as well), and it will be headed in the direction of your drift. Therefore if you have your heading and airspeed, you can find out the windspeed.
Skyguy11 From , joined Dec 1969, posts, RR: Reply 9, posted (11 years 6 months 3 weeks 3 days 15 hours ago) and read 5316 times:
Or see how far you went in a minute and multiply that by 60. This will work better in faster planes, however, because it's kind of hard to distinguish between 1.4nm and 1.6nm.
But if you see how far you go in 6 minutes and multiply it by 10 then you will get a more accurate answer. I prefer to time myself between two predetermined checkpoints, and divide the distance by the time.
TurbineBeaver From United States of America, joined Jan 2002, 1199 posts, RR: 0 Reply 13, posted (11 years 6 months 3 weeks 2 days 8 hours ago) and read 5258 times:
The first thing I learned when flying a cross country: calculate groundspeed after every checkpoint. Yeah, we've got the fancy GPSs, but there are easy ways. Find two points on your sectional, measure the distance between, and fly from them, timing it. Then, just plus it into your flight computer or whiz wheel, the distance and the time, and you get your groundspeed. Then, by referencing this to your airspeed, you can get a good sense of the wind.
Bio15 From Colombia, joined Mar 2001, 1089 posts, RR: 7 Reply 14, posted (11 years 6 months 3 weeks 2 days 4 hours ago) and read 5243 times:
>>>Then, just plus it into your flight computer or whiz wheel, the distance and the time, and you get your groundspeed
I believe all pilots should be able to NOT use a computer on this one!!!
you know the distance, you know the time, so guess what! The velocity is your distance divided by the time it took you to fly it.
That, you plus it into your brain and give your maths some exercise.
It's just a shame seeing there's nothing to do about the issue of computers dominating aviation, and pilots getting dumber.
Saxman66 From United States of America, joined Sep 2000, 518 posts, RR: 0 Reply 16, posted (11 years 6 months 3 weeks 1 day 20 hours ago) and read 5209 times:
As for wind ask FSS for the winds aloft. Then interpolate that for your altitude. Also the general direction that the wind is at the airport will be about the same in the air. As for WCA (wind correction angle) i use about 5 degrees of correction for every 10 knots of direct crosswind. You just kinda have to mess with it.