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VOR technigue, don't overshoot
There are a couple of techniques I've never been particularly good at while
flying, proper rudder work, and smooth turn onto a VOR radial without over or undershooting the needle. What's a good way to smoothly know when to start a standard rate turn onto the heading to intercept a VOR/GPS course on the OBS? My flying these days is with PC sims and often with an HSI. With an HSI you have the lubber line and can keep the end of the lubber line on the needle as it swings to get good results. What would be the non-HSI equivalent for spam can flying? -- Scott "Democracy is the theory that the common people know what they want, and deserve to get it good and hard." H. L. Mencken http://tinyurl.com/6qkhjb |
#2
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VOR technigue, don't overshoot
tscottme wrote:
What would be the non-HSI equivalent for spam can flying? The CDI and DG? |
#3
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VOR technigue, don't overshoot
On 12/05/08 13:39, tscottme wrote:
There are a couple of techniques I've never been particularly good at while flying, proper rudder work, and smooth turn onto a VOR radial without over or undershooting the needle. What's a good way to smoothly know when to start a standard rate turn onto the heading to intercept a VOR/GPS course on the OBS? My flying these days is with PC sims and often with an HSI. With an HSI you have the lubber line and can keep the end of the lubber line on the needle as it swings to get good results. What would be the non-HSI equivalent for spam can flying? This is a great question - plus it's aviation related! Here are some notes I took during my instrument training. I hope you find them useful: - Choosing an intercept angle This was pretty easy too, once I thought about it some. There are some rules of thumb to remember: - when within 3 miles of the station, use 30 degree angle - when 3 to 10 miles from the station, use 30 - 45 degrees - when more than 10 miles from the station, use 45 - 60 degrees To select the intercept angle, just look at the side of the OBS where the CDI needle is deflected. Then just count from the top of the OBS toward the needle, the number of degrees of the desired intercept angle. Then just fly that heading. Assume we want to track outbound on the 090 degree radial. We dial in 090 in the top of the OBS and see that the needle deflects to the left. Because we are 5 miles from the station, we select an intercept angle of 40 degrees. So now we just count to the left from our radial (090) the number of degrees of the intercept angle (040) and that gives us our heading to fly: 050. Fly a heading or 050 and you will intercept the 090 degree radial at 40 degrees. Wind will affect things here. - Deciding when to turn on to the selected radial The further we are from the station, the longer it will take to move the needle. Therefore, when we're close to the station (within 3 miles) we'll need to start our turn with about 2 dots of CDI deflection. However, when we're more than 10 miles from the station, we'll need to start our turn when the CDI needle is much closer, say within the "circle". My CFII said this will just take some practice to get a good feeling for when to turn. Most of this assumes you know your distance from the station. If you don't, you'll just have to make your best guess. -- Mark Hansen, PP-ASEL, Instrument Airplane, USUA Ultralight Pilot Cal Aggie Flying Farmers Sacramento, CA |
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VOR technigue, don't overshoot
Thanks Mark. Your answer was exactly what I was looking for.
-- Scott |
#5
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VOR technigue, don't overshoot
Thanks Barry. Actually I was trying to ask what was technique without using
an HSI, not what instruments would one use if one had no HSI. More specifically, when to start a turn toward the on-course heading? -- Scott "Democracy is the theory that the common people know what they want, and deserve to get it good and hard." H. L. Mencken http://tinyurl.com/6qkhjb "B A R R Y" wrote in message ... tscottme wrote: What would be the non-HSI equivalent for spam can flying? The CDI and DG? |
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VOR technigue, don't overshoot
tscottme wrote:
Thanks Barry. Actually I was trying to ask what was technique without using an HSI, not what instruments would one use if one had no HSI. More specifically, when to start a turn toward the on-course heading? Since you described yourself as a simmer, I wasn't sure if you knew they existed. Mark described it well! |
#7
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VOR technigue, don't overshoot
tscottme writes:
There are a couple of techniques I've never been particularly good at while flying, proper rudder work, and smooth turn onto a VOR radial without over or undershooting the needle. What's a good way to smoothly know when to start a standard rate turn onto the heading to intercept a VOR/GPS course on the OBS? My flying these days is with PC sims and often with an HSI. With an HSI you have the lubber line and can keep the end of the lubber line on the needle as it swings to get good results. What would be the non-HSI equivalent for spam can flying? It is theoretically possible to calculate the exact turn required to land precisely on a desired radial, but this type of calculation is extremely awkward to carry out in flight, even with a calculator. Shortcuts can be very useful for specific situations and specific aircraft, but they are rarely applicable or accurate outside the very specific circumstances for which they were developed. I think the only practical way to turn precisely is with practice in a specific aircraft. A great deal of practice probably isn't required, just a few hours of practicing turns. Of course, if you change to a new aircraft, or to a new flight regime, you'll have to practice again. Even autopilots don't necessarily turn right on the mark. It depends on how sophisticated the autopilot is (obviously airliners can afford better ones than small private aircraft). |
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VOR technigue, don't overshoot
Mxsmanic wrote:
Even autopilots don't necessarily turn right on the mark. It depends on how sophisticated the autopilot is (obviously airliners can afford better ones than small private aircraft). The master sim pilot speaks again. As usual you don't know ****. Some of the newer light aircraft autopilots, like the Garmin, are better than anything the airlines had for many years. But, the only autopilot you know is one that was written by software engineers at Microsoft who don't know much more about real airplanes than you do. |
#9
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VOR technigue, don't overshoot
"Sam Spade" wrote in message
... Mxsmanic wrote: Even autopilots don't necessarily turn right on the mark. It depends on how sophisticated the autopilot is (obviously airliners can afford better ones than small private aircraft). The master sim pilot speaks again. As usual you don't know ****. Some of the newer light aircraft autopilots, like the Garmin, are better than anything the airlines had for many years. But, the only autopilot you know is one that was written by software engineers at Microsoft who don't know much more about real airplanes than you do. The Garmin autopilot only came out recently, but you are correct in that others have had GPSS for quite some time. Most of the sophistication takes place in the GPS, the FMS, and/or the GPSS rather than the autopilot itself. With the advent of RNP the airlines have come up to speed significantly, but there are still some carriers that don't even have GPS to this day, and many airline crews won't accept RNAV approaches even though they have been readily available and highly used by GA for years. As usual, Anthony doesn't have a clue past what he can learn via MSFS. |
#10
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VOR technigue, don't overshoot
By his comment, it might actually appear that Anthony has really flown
multiple different airplanes, and has knowledge about tracking VORs and autopilots. Of course, he has never used an autopilot of any kind, and he has never flown anything other than a game with a joystick. |
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