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How to get an IFR clearance at a non-towered airport

February 23, 2024/in Tips and technique/by John Zimmerman

Flying a light airplane offers access to thousands more airports than the airlines serve, which means you can land closer to your destination, avoid long taxi routes, and save time. For an instrument pilot, though, there is one key difference between a smaller, non-towered airport and a larger one with an air traffic control tower: obtaining an IFR clearance.

Basic attitude instrument flying – the foundation for IFR flight

February 22, 2024/in IFR flying/by Eric Radtke

As the complete instrument pilot, you should be able to maintain heading, altitude, and airspeed at speeds ranging from cruise to approach. Within the normal speed range of an airplane, there are many combinations of power and pitch which will maintain altitude at different airspeeds.

How to get an IFR clearance at a non-towered airport

February 23, 2024/in Tips and technique/by John Zimmerman

Basic attitude instrument flying – the foundation for IFR flight

February 22, 2024/in IFR flying/by Eric Radtke

Full Sized Blog Element (Big Preview Pic)

How to get an IFR clearance at a non-towered airport

February 23, 2024/in Tips and technique/by John Zimmerman

To review, flying an IFR trip involves four main steps:

File a flight plan (either with Flight Service or in an aviation app).
Call for your IFR clearance, including route, altitude, and transponder code.
After takeoff, talk to Air Traffic Control (ATC) to transition into the en route environment.
At the end of the flight, cancel IFR (either after landing or when the destination airport is in sight).

Step one is the same no matter where you are, but step two can vary dramatically based on your departure airport. Here are three ways to get a clearance at a non-towered airport.

1. Call on the phone

In ancient times (i.e., the 1990s) getting a clearance at a remote airport usually meant calling Flight Service on a pay phone. The briefer would contact ATC and relay the clearance to you, which could occasionally be a lengthy process. After reading back the clearance, the pilot would run to the airplane, fire up the engine, and try to get airborne before the clearance expired. I remember doing exactly this during my instrument training at a very remote airport: the nearest pay phone was about a mile away from the airport ramp, so it was quite the accomplishment to lift off before my timer expired.

Today there’s a better way. First, ubiquitous cell phones make it much easier to call for that clearance. You can be standing by the airplane or even sitting in the airplane at the end of the runway. When you get the question, “which runway and how long until you’re ready?” you can answer confidently—because you’re first in line for the runway.

Apps like ForeFlight make it easy to find phone numbers for ATC.

Secondly, you can now cut out the middleman and call ATC directly. In 2019, the FAA began publishing phone numbers for ATC facilities that can be used by pilots to pick up a clearance. These are published in the chart supplement (the old A/FD) and are also easily accessible in most aviation apps. In ForeFlight, for example, go to the Airports tab, then Frequencies, and tap on Clearance. You’ll see any radio frequencies available, but you’ll also see a phone number and facility name there. If you’re using the app on your phone, just tap the number to dial it.

Pro tip: Connect your cell phone to a Bluetooth-enabled headset, like a Bose A20 or Lightspeed Delta Zulu, and enjoy the noise-canceling benefits of the headset’s microphone and ear cups. It’s much easier to understand those complicated IFR routes. Don’t have a Bluetooth headset? Use an Audio Link to add this feature to any aviation headset.

2. Call on the radio

Some airports offer a way to contact ATC using your airplane’s COM radio, eliminating the cell phone hassle. While most pilots call this an RCO (for Remote Communications Outlet), it’s technically called an RTR (remote transmitter/receiver), since RCOs are for Flight Service. No matter what you call it, the procedure is the same: tune up the frequency published in the chart supplement, approach plate or app, and press the push-to-talk button. Once again, you’ll be talking directly to a controller at a nearby ATC facility.

There’s another option that is pretty rare but still available at some airports: a GCO. These are a lot like RCOs, but instead of offering a direct radio connection to ATC, it uses a landline. Read the notes for each GCO, because details can vary, but in general you’ll need to do four slow and steady clicks on the frequency to wake up the GCO and dial ATC. When this happens, you will literally hear the phone ringing and you can then talk to the controller just like you would on a regular RCO.

Sometimes you can reach ATC using the same frequency used in the air, instead of an RCO or GCO. This depends on the terrain and the location of ATC’s antennas, so don’t assume it will work. If you’re landing at an airport, you can always ask ATC if the current frequency works on the ground.

Pro tip: If you’re having trouble reaching ATC, try switching radios. Many airplanes have one COM antenna on the belly and one on the roof of the airplane. Depending on where ATC’s antenna is located, one radio may have better results.

Sidebar: The elements of an IFR clearance

When in doubt, follow the CRAFT prompts.

Once the person on the other end answers, whether it’s on the phone or over an RCO, you’ll be talking to a controller at a nearby TRACON or Center facility. Tell them your tail number, where you are, and the IFR flight plan you’d like to open. Assuming there are no issues, the controller will read out your clearance in the familiar CRAFT format: clearance limit (typically your destination airport), route, initial altitude and expected final altitude, frequency to contact departure control after takeoff, and your transponder code.

There are two additional elements you’ll probably hear when departing a non-towered airport. First is “enter controlled airspace on heading XXX.” That’s obviously the heading ATC expects you to be flying when you contact them after leaving the traffic pattern, but it’s also a reminder that you as the pilot in command are responsible for terrain and traffic avoidance right after takeoff. Don’t assume a straight-out departure is safe, especially in mountainous areas (you did check for obstacle departure procedures, right?).

The second element is a void time, which is essentially an expiration date for your clearance. When ATC says “you are released for departure,” they are blocking the airspace around the airport so that no other IFR aircraft can take off or land. They obviously can’t do that forever, so if for any reason you cannot take off before the void time, your clearance is canceled and you’ll need to call ATC again. Sometimes this is delivered in a very wordy way: “Clearance void if not off by 1455 Zulu; time now 1445 Zulu; if not off by 1455 Zulu advise no later than 1520 Zulu.” This gets confusing fast, so many controllers will just say, “Clearance void if not off in five minutes.”

So a typical clearance would sound something like this (in this case over an RCO):

“Cincinnati Clearance, Cessna 12345 on the ground at Clermont Country, requesting IFR clearance to Oshkosh.”
“Cessna 12345, Cincinnati, you are cleared to Oshkosh as filed, climb and maintain 2500, expect 8000 ten minutes after departure, departure frequency 121.0, squawk 4664, hold for release.”
“Cleared to Oshkosh as filed, climb and maintain 2500, expect 8000 in ten minutes, frequency 121.0, squawk 4664 – Cessna 12345.”
“Cessna 12345, readback correct. Which runway will you be using and how long until you’re airborne?”
“We’ll be using runway 22, departing in 5 minutes – Cessna 12345.”
“Cessna 12345, you are released for departure. Clearance void if not off in five minutes.”

Pro tip: Remember that an IFR clearance only protects the airspace around that airport from other IFR flights. There could be a dozen VFR airplanes in the pattern, so look outside and make good radio calls on CTAF.

3. In the air

A good ANR headset like the Lightspeed Delta Zulu can make it a lot easier to get your clearance.

The last option is to take off VFR and then call ATC once you’re airborne to get your IFR clearance. This works well if the weather is good and you don’t need an IFR clearance to take off and depart the pattern. It’s usually faster and in some cases is easier for ATC—there’s no void time and no spotty RCO coverage issues. It can even be good manners, because it doesn’t tie up a taxiway while you call for clearance or prevent another IFR airplane from landing.

However, this procedure should only be used when both the weather and terrain are favorable. If the ceiling is 1500 overcast or the visibility is 3 miles in rain, you will leave yourself very little margin for error by scud running while you wait for an answer from ATC. Remember, until ATC issues a clearance and says “radar contact,” you are responsible for terrain avoidance. It’s also important to consider where you’re operating from—do not expect a happy reply if you try this with New York Center on a busy Friday night with marginal weather.

Pro tip: Prepare your avionics on the ground. With this option, you’ll be both flying and copying a clearance so the more you have set up ahead of time, the better. You know the route you filed (and apps like ForeFlight even tell you what route to expect from ATC), so load that in the GPS.

Basic attitude instrument flying – the foundation for IFR flight

February 22, 2024/in IFR flying/by Eric Radtke

There’s a reason why basic airplane attitude instrument flying comes first in any Instrument curriculum – it’s the foundation for everything else you’ll do in IFR flying. If you master airplane attitude instrument flying, then everything else you will do that follows, from departure procedures to instrument approaches, will simply be combining your BAI skills with navigation.

Pitch corrections should be made using half, full, and one and one half bar widths corrections.

STRAIGHT AND LEVEL

Like your visual flying, most of your instrument time will be spent flying straight and level. As the complete instrument pilot, you should be able to maintain heading, altitude, and airspeed at speeds ranging from cruise to approach. Within the normal speed range of an airplane, there are many combinations of power and pitch which will maintain altitude at different airspeeds. For example, a low power setting and nose high pitch will maintain altitude at low airspeed while a high power setting and low pitch attitude will bring about level flight at high airspeed.

The art of instrument flying involves finesse of the flight controls – fine inputs for precise control. Pitch corrections for level flight should be made using the attitude indicator and limited to half, full, and one and one half bar widths corrections. The pitch corrections to maintain level flight on instruments are smaller than those made using the natural horizon. When the airplane is properly trimmed, the control pressures needed for these small pitch changes are very light. For corrections of more than 100 feet, use a full bar width pitch change initially, changing to a half bar width when the remaining altitude correction is less than 100 feet.

HEADING AND BANK CONTROL

The most common error in both pitch and bank control is over controlling.

Heading and bank control are virtually the same thing. Heading will stay constant if the wings are kept level in coordinated flight. The wings of the miniature airplane and the horizon bar of the attitude indicator will give you an overall picture of the wing attitude, but small banks are difficult to detect. Small deviations from wings level attitude are more easily detected using the banking scale and center index. Odds are that bank control will require more practice than pitch control. There are several reasons for this. First, the airplane is more stable in pitch than bank and, if you are a typical VFR pilot, you refer to the altimeter more than to the heading indicator.

While the attitude indicator will show if the wings are being kept level, you still need to look at the heading indicator to be sure the heading accurate and that it is kept constant. The attitude and turn indicators provide supporting information regarding bank and everything should agree during straight flight.

The most common error in both pitch and bank control is over controlling. Just as an excessive climb or descent will cause you to overshoot altitude, an excessive rate of turn results in overshooting the target heading.

For heading corrections of five degrees or less, keep the wings level and use rudder pressure to change the heading. Five degrees of heading change doesn’t give you enough time to make a coordinated turn. If heading is off more than five degrees, make a coordinated turn but restrict the banks to half the number of degrees you want to turn but not more than standard rate.

Airspeed changes in level flight are normally accomplished by changing the power.

AIRSPEED CHANGES

Intentional airspeed changes in level flight are normally accomplished by changing the power. Adjust the power to the setting that you previously determined will produce the desired airspeed. Adjust the pitch attitude to maintain altitude as the airspeed changes. As the airspeed approaches the desired airspeed, the airspeed indicator becomes the primary power instrument and the altimeter is primary for pitch. Fine tune power and pitch as the airplane stabilizes at the new airspeed. And trim to relieve control pressures.

CLIMBS

To enter a constant airspeed climb, raise the nose to bring the miniature airplane the predetermined position above the horizon bar.

Now let’s take a look at climbs. To enter a constant airspeed climb, raise the nose to bring the miniature airplane the predetermined position above the horizon bar. As the pitch attitude is raised, increase the power to the climb setting and use right rudder to keep the airplane from turning to the left.

Adjustments of the climb attitude will be dictated by the indicated airspeed. If airspeed is too high or low, the pitch attitude must be changed. Don’t chase the airspeed indicator to make the change. Use the attitude indicator to make small changes of one half bar width, wait, and note the effect on the airspeed indicator.

As the desired altitude is approached, the level off must be started at about 10 percent of the rate of climb before reaching the altitude. If the climb is 500 feet per minute, the pitch attitude should be smoothly changed to the level flight attitude 50 feet before reaching the final altitude. Use the attitude indicator to set the level attitude and grade this attitude using the altimeter.

For a constant rate climb, increase the power to the approximate setting required for the desired rate of climb and simultaneously raise the nose to the approximate pitch attitude needed for that climb rate. As the vertical speed indicator stabilizes, it becomes the primary pitch instrument and the airspeed indicator is primary for power. Lead the level off by ten percent of the rate of climb and adjust the pitch and power to the appropriate settings for the desired level airspeed.

DESCENTS

Female pilot on approach to land in instrument conditions with rain.

As the airspeed approaches the descent speed, lower the nose to the predetermined attitude.

Now let’s look at descents. To enter a descent at constant airspeeds up to maximum structural cruise airspeed, simultaneously lower the pitch attitude and reduce power to the predetermined setting. When entering a descent at an airspeed less than cruise, reduce power to the predetermined setting and slow the airplane in level flight. As the airspeed approaches the descent speed, lower the nose to the predetermined attitude.

Make corrections for airspeed by changing pitch attitude and, at the risk of sounding like a broken record, use the attitude indicator to make small pitch changes. To correct a rate of descent at a specific airspeed requires changing both pitch and power. If you start with the predetermined power setting and pitch attitude, any corrections needed will be small.

In order to level off from a descent, you must start your level off before reaching your desired altitude. To do this, lead the level off by about ten percent of the rate of descent. As an example, if you are descending at a rate of 500 feet per minute, lead the level off by about 50 feet. To level off at an airspeed higher than descent speed, lead the level off by 20 to 30 percent of the rate of descent. In the 500 foot per minute example, you would add power and start your level off between 100 and 150 feet before reaching your desired altitude .

BUILD A CHEAT SHEET

It’s good practice to document specific pitch and power settings for various aircraft configurations. You can do this with a flight instructor or safety pilot to determine the most common instrument profiles for your training aircraft. And then when it comes time to execute and fly the specific profiles, it’s only a matter of establishing the predetermined pitch and power to give you the expected performance. Only small adjustments will then be needed for precise control – the art of basic attitude instrument flying.

Half Sized Blog Element (Single Author Style)

Half Sized Blog Element (Multi Author Style)

How to get an IFR clearance at a non-towered airport

Basic attitude instrument flying – the foundation for IFR flight

How to get an IFR clearance at a non-towered airport

Basic attitude instrument flying – the foundation for IFR flight

Full Sized Blog Element (Big Preview Pic)

How to get an IFR clearance at a non-towered airport

1. Call on the phone

2. Call on the radio

Sidebar: The elements of an IFR clearance

3. In the air

Basic attitude instrument flying – the foundation for IFR flight

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