As all Cirrus pilots know, SR20s and SR22s have 2 batteries in the Cirrus electrical system (technically, they have 3, as Battery 2 is made up of 2 12 volt batteries in series with each other). Battery 1 provides power to the starter and is a backup for the entire Cirrus electrical system, while Battery 2 provides backup for the Essential Bus items.
If you look on the engine page of either an Avidyne or a Garmin Cirrus, there is a section showing the Cirrus electrical system health. With the engine running, you have voltmeters showing the voltage from Alternator 1 and Alternator 2, ammeters showing the amperage output from Alt 1 and Alt 2, and an ammeter showing the charging rate of Battery 1. There is no indication for Battery 2.
This brings up a question. How does the pilot know that Battery 2 has any kind of a charge? What happens if the whole Cirrus electrical system goes caput and all that’s left is Battery 2? Will Battery 2 have juice then?
The answer is actually rather simple. As part of the pre-flight inspection, the first step in the cabin inspection is to turn the Battery 2 switch on, then check the Essential bus volt meter. The checklist says the voltmeter should be reading between 23-25 volts. This tells you how much voltage Battery 2 currently has. The next step (after ensuring the flap lights are out) is the turn Battery 1 on. Battery 1 then powers the Main Bus and Essential Bus. The voltage showing on the Main Bus shows how much voltage Battery 1 currently has.
Easy enough right? Now you can impress friends and family alike with your Cirrus electrical knowledge!
In the Pre-Takeoff Checklist for any Cirrus aircraft, it calls for pilots to perform a Cirrus Autopilot Check. It is prudent to check the autopilot before your flight to ensure that all aspects of the autopilot are working properly. The only problem is, the checklist doesn’t spell out how to perform the Cirrus Autopilot Check. You would have to go to the POH for the airplane, which is usually in the back seat or a bag somewhere and therefore hard to get to, in order to find the procedure.
The procedure for checking the autopilot is slightly different depending on what autopilot is in your airplane. The procedures for all three are below.
S-TEC 55x
Sync the heading bug to your current heading
Activate heading mode on the autopilot
Twist the heading bug left and right to ensure the ailerons move left and right
Sync the heading bug to your current heading
Activate vertical speed mode on the autopilot
Move the vertical speed bug (or the vertical speed on the altitude pre-selector if you have a steam gauge Cirrus) up and down to ensure the elevator moves accordingly
Ensure you can overpower the autopilot
Press the autopilot disconnect switch to ensure the autopilot shuts off
Avidyne DFC 90
Press the AP button to activate the autopilot
Ensure AP, ROLL, and PITCH Annunciations are depicted in green on the top of the PFD
Set the heading bug 90 degrees from the current heading
Press the HDG button on the autopilot
Ensure the ailerons are moving in the proper direction and HDG is annunciated on the top of the PFD
Ensure you can overpower the autopilot
Press the autopilot disconnect switch on the stick and ensure the autopilot has disconnected
Garmin GFC 700
Press the AP button to activate the autopilot
Ensure you can overpower the autopilot
Press the autopilot disconnect switch on the stick to ensure the autopilot has disconnected
In the Pre-Takeoff Checklist for any Cirrus aircraft, it calls for pilots to perform a Cirrus Autopilot Check. It is prudent to check the autopilot before your flight to ensure that all aspects of the autopilot are working properly. The only problem is, the checklist doesn’t spell out how to perform the Cirrus Autopilot Check….
One evening this summer, my wife and I were flying down the southern shore of Long Island in my father’s E33 Bonanza. We enjoyed the sunset as we flew westbound and our plan was to fly the New York Hudson corridor, where we would arrive just after dark. As we approached New York’s airspace, two voices in my head started having a debate.
The first voice said: “You should turn on your landing light when you get to New York to make the airplane more visible.”
The other voice said: “That’s true, but I bet you’ll burn the landing light out”
Well, as it turned out, both voices were right. My landing light fired right up when I needed it to fly the Hudson, but when it came time to land back home I had no such luck. Unfortunately, this was not the first time that I had been given the chance to practice my blackout landings. This Bonanza model has only one landing/ taxi light which is mounted in the lower cowling behind the propeller. This location is less than ideal because the filament in the bulb is fragile and can be damaged by engine vibration.
We landed uneventfully and after putting the airplane away, I decided it was time to look into upgrading the lighting to something a little more modern. I was unsure of my options, but seeing as the airplane needed a replacement bulb regardless, it seemed like a good opportunity to make a change.
After doing a little reading, I learned that HID or LED landing lights would be the best solution to my problem. I was familiar with LED aircraft lights, but had never heard of HID before.
Here is what I learned:
HID Landing Lights
HID, or High Intensity Discharge landing lights, create light by arcing electricity through a sealed gas capsule. They are brighter than LED and traditional incandescent, and the light created more closely resembles the look and feel of sunlight. HID installations require a ballast to carefully regulate the flow of electricity to the gas capsule and also require a “warm up” period after being turned on in order to reach their full brightness.
Fitting an aircraft with HID landing lights tends to be more expensive and time consuming than installing an LED light and would likely require involvement by an A&P/ IA. However, if you want the brightest light available, HID is probably the best bet.
Pros
Brighter, more natural looking light
Draws less power than standard bulbs
Long bulb life
Does not generate much heat
Cons
More expensive than other lighting options
Lights must “warm up” after being turned on
Cannot be pulsed easily
Cost/complexity of installations
LED Landing Lights
LED, or Light Emitting Diode landing lights, have no filament and work by moving electricity through diodes which are connected into a circuit. These lights have become very popular for many uses due to their simplicity, low cost, and brightness.
While not as bright as HID light, the LED lights require no “warm up period” and can be easily pulsed. LED lights draw much less power from the aircraft’s electrical system than traditional bulbs and boast incredible life length. LED bulb installation is very simple and can often serve as a direct replacement for the original lights.
Pros
Instant light (no warm up)
Incredible life length (>5,000 hours)
Low Cost
Simplicity of installation
Can be pulsed easily
Low power draw
Cons
Not as bright as HID lighting
After weighing the options, I decided to replace the incandescent bulb in the Bonanza with an LED bulb. I read the reviews online and talked to some of my friends who work in aviation and eventually decided on the Lycoming Alphabeam. The Alphabeam is FAA/PMA approved and is available through Aircraft Spruce and other aviation parts vendors. The bulb cost around 250-300 dollars and I was able to install it as a direct replacement for our old light. All I had to do was take the old one out, put the new one in, and make a logbook entry.
Below are some pictures of the installation:
After removing the old bulb, I double checked the information on the back to be sure I ordered the correct LED replacement.
You can see that the bulb is a 13V, 250W landing light, #4313.
The new light mounted easily into the existing bracket with no modification.
After mounting the new bulb, I reconnected the wiring and installed the bracket back into the nose bowl.
It works!
Last weekend I finally had an opportunity to take the airplane out after dark and see how the new light compared to the old one. I am pleased to say that it did a wonderful job and exceeded my expectations.
If you are interested in seeing a side by side comparison of the different lighting options, a quick Google search should provide what you are looking for. In my own experience, I would say that the LED light was brighter than the old light and did a very good job illuminating the taxiway and runway. It was extremely nice not to be concerned that my light wouldn’t work as I was setting up for landing at an unfamiliar field after dark. I also enjoyed feeling that I had the option to leave it on during climb and cruise in order to increase my visibility to other aircraft.
Many models of aircraft have multiple landing/ taxi lights installed which greatly reduces the likelihood of having to land without one. In our case, spending the extra money to upgrade to the LED bulb made sense because of the desire for increased reliability. If you are looking for a relatively inexpensive way to upgrade your airplane, LED or HID lighting may be something to consider.
Andrew Robinson is a 135 Charter Pilot and flight instructor who lives with his wife and 2 daughters in Pennsylvania. He flies Pilatus PC-12s and instructs in Beechcraft Bonanzas.
One evening this summer, my wife and I were flying down the southern shore of Long Island in my father’s E33 Bonanza. We enjoyed the sunset as we flew westbound and our plan was to fly the New York Hudson corridor, where we would arrive just after dark. As we approached New York’s airspace, two…
Density Altitude: Pressure Altitude corrected for non-standard temperature.
That’s the book definition of density altitude. The problem is, that definition leaves a lot of general aviation pilots scratching their heads. What really is density altitude?
All airplane engines rely on air and fuel mixing together, then that mixture is ignited to create combustion. Normally aspirated piston engine airplanes get their best performance at sea level, where the air is nice and thick, allowing plenty of air molecules to get sucked in the engine intake. As a normally-aspirated airplane climbs, the ambient air pressure drops with an increase in altitude (the air gets thinner, less dense), thereby reducing airplane takeoff, climb, and landing performance. There just isn’t as much air at higher altitudes, to put it simply.
Turbo charged piston engines assist with this air density problem. A turbo charger boosts the air coming into the engine and fools the engine into thinking it is at sea level pressure all the time. The higher the altitude, the faster the turbo charger spins, spinning the compressor faster, which compresses more air to continue to give the engine sea level pressure air. This gets faster cruise speeds the higher you go.
Both normally aspirated & turbo charged engines do experience longer takeoff rolls and reduced climb rates at higher airport elevations & higher altitudes.
How does this all relate to density altitude?
When the outside air temperature rises, the air becomes thinner, less dense. This means that when an airport elevation is 1,000 feet, but the density altitude is reported as 3,000 feet, the airplane engine thinks it is at 3,000 feet. It won’t accelerate as fast. The airplane’s climb rate will also be reduced. That means that the normal climb pitch attitude a pilot is used to seeing won’t be accurate at higher density altitudes. It will lead to slower indicated airspeeds, slow enough to potentially lead to a stall if a pilot isn’t paying attention.
Where does this get dangerous? High elevation airports. Whenever the OAT creeps above 85 or 90 at an airport that is higher elevation (I would classify higher elevation as 2,500 feet or higher), the corresponding density altitude sky rockets. If a pilot isn’t paying attention to airspeed or angle of attack (if the airplane is equipped with an AOA), a stall can come very quickly on climb out.
What to take home from this? Monitor your climb speed and angle of attack, especially right after takeoff, when you hear density altitude on the ATIS or AWOS.
Density Altitude: Pressure Altitude corrected for non-standard temperature. That’s the book definition of density altitude. The problem is, that definition leaves a lot of general aviation pilots scratching their heads. What really is density altitude? All airplane engines rely on air and fuel mixing together, then that mixture is ignited to create combustion. Normally aspirated…
There have been lots of changes in all parts of our lives with the coming of COVID-19. All of our lives have been affected in one way or another. We hope and pray that none of your families have been directly affected by the illness.
A lot of us have been living under Shelter in Place orders for several weeks now, only going out for groceries and making sure to keep our distance from people. We have to take a different mindset when we go out now. Even meeting new people is different since we can’t shake hands.
Flying has been an afterthought for a lot of pilots. There have been multiple ATC facilities where controllers have been afflicted with the virus and have had to shut down for hours or days. Airspace can change pretty quickly, going from what we all know as normal, to an ATC-ZERO scenario. This was the case for New York Center several times over the last two weeks.
There was some uncertainty regarding flight training under the shelter in place orders and Texas Top Aviation has been asked several questions about it over the last week. Yesterday, the Flight School Association of North America (FSANA) announced that flight instruction was indeed an essential business.
In an article on GeneralAviationNews.com, the website quoted a memorandum of understanding written by attorney George Winton on March 24th. Winton was a senior attorney for the FAA and U.S. Department of Justice, and now operates The Aviation Law Firm in Annapolis, Maryland.
“This memorandum affirms the statement that…flight training would be included as a critical infrastructure activity. Those engaged in the provision of and receipt of flight training who work to provide enhanced compliance with CDC recommendations for limiting potential COVID-19 exposure and spread would be considered exempt from travel limitations imposed by local authorities.”
Winton’s memo was sent to the Department of Homeland Security’s Cybersecurity and Infrastructure Security Agency (CISA). In the memo, Winton stated:
“CISA listed Other Community-Based Government Operations And Essential Functions as follows: Workers who support necessary credentialing, vetting and licensing operations for transportation workers.”
“The aviation sub-sector stakeholders involved with operation of recreational aircraft and flight schools, who employ Essential Critical Infrastructure Workers from the Transportation Sector, support necessary credentialing, vetting and licensing operations for transportation workers seeking pilot certification by the Federal Aviation Administration. Since CISA intended to be overly inclusive to reflect the diversity of industries, the aviation mode stakeholders understand that essential employees involved with the operation of recreational aircraft and flight schools continue to be identified as Essential Critical Infrastructure Workers from the Transportation Sector. Accordingly, the aviation sub-sector stakeholders who employ Essential Critical Infrastructure Workers from the Transportation Sector will continue to operate recreational aircraft and flight schools, appropriately modified to account for CDC workforce and customer protection guidance, based upon the CISA memorandum dated March 19, 2020.”
Based on the above guidance, Texas Top Aviation will continue to operate flight training in all of it’s normal capacities, while maintaining vigilance concerning sanitation, cleanliness, and health. Our company will keep it’s customer’s up to date on instructor health and wellness and won’t hesitate to cancel if there is any kind of health concern. We ask our customers to do the same.
If you are scheduled to train with Texas Top Aviation, please don’t hesitate to contact us with any questions or concerns you might have.
To read the entire memo from George Winton, you can find it here.
Concerning the 2020 Texas Top Aviation Santa Fe Golf Fly In scheduled for June 5th-7th, that event is currently being re-scheduled for September 2020. Dates will be announced by the end of April. We look forward to seeing you in Santa Fe in September!
There have been lots of changes in all parts of our lives with the coming of COVID-19. All of our lives have been affected in one way or another. We hope and pray that none of your families have been directly affected by the illness. A lot of us have been living under Shelter in…
We have all seen the little first aid kits that a pilot can get to carry in an airplane. It usually has some bandaids, maybe some gauze, and some antibiotic ointment. Very helpful in the even that your paper VFR chart cuts your finger when you are unrolling it.
What happens if you crash in a harsh environment and you have some actual injuries to take care of?
Enter the Guardian Seven Trauma G7-Alpha Trauma and Egress Kit. It literally is a First Aid Kit on steroids.
Guardian Seven Trauma has put together a kit that contains just about anything you need to take care of an injury from an airplane crash. Plus, the kit only weighs less than 2 pounds. It easily mounts in an aircraft and can be opened with only one hand.
First Aid Kit on Steroids We have all seen the little first aid kits that a pilot can get to carry in an airplane. It usually has some bandaids, maybe some gauze, and some antibiotic ointment. Very helpful in the even that your paper VFR chart cuts your finger when you are unrolling it. What…
On March 30th, Texas Governor Greg Abbott issued an Executive Order mandating that all travelers (including Texas air travelers operating or traveling in private aircraft) from the following designated areas were to self-quarantine for 14 days (or the extent of their stay in Texas, whichever was shorter) upon entering the State:
California
Louisiana
Washington State
Atlanta, Georgia
Chicago, Illinois
Detroit, Michigan
Miami, Florida
If you traveled to Texas by air from any of the above designated areas, you are required to fill out the Arrivals from Areas Designated for Mandatory Self-Quarantine Form. Failure to do so could lead to a $1,000 fine or 180 days in jail, or both. For private aircraft owners/operators, put your Tail Number in for Flight Number and “Private” for Airline.
Aircraft owners, stay away from the designated areas listed above and you won’t have any worries. A lot of you reading this are from Texas, so make Louisiana a fly over state for now and don’t make any landings in Cajun country.
Texas Air Travelers From Designated Areas Only On March 30th, Texas Governor Greg Abbott issued an Executive Order mandating that all travelers (including Texas air travelers operating or traveling in private aircraft) from the following designated areas were to self-quarantine for 14 days (or the extent of their stay in Texas, whichever was shorter) upon…
