I used to fly at Black Forest Gliderport in Colorado (Elevation 7200 feet) and we would often have pilots fly in to fly gliders. It's amazing at how often we would hear someone trying to start their injected engines with an OAT of 85-90°F and could not get them to run. They would start, belch black smoke an die. They had no idea how to crank a complex engine with a density altitude of around 10,000 feet. One of the instructors would usually go out to where they were parked and help them get going. I tried to help a guy flying a Baron but was told he didn't need some Cub pilot telling him how to fly. He got one engine running and sat there cranking on the other one until he burned the starter out.
Helo pilot in southern Arizona. Studying for CFI and looking for resources. Your presentation was spot on, focused, and a great reference. Thank you for taking the time! Much appreciated here in hot desert
As a CFI, I commend you on the clear and precise explanation of a density altitude chart. I found your channel while doing research on the story of two airline captains on a delivery flight of a new Cessna 150 and decided to descend into the famous meteor crater near Winslow, Arizona, where they crashed when they couldn't climb out. I did a little reverse engineering and came up with two grown men with luggage and full tanks (topped off at Winslow) put the 150 at about max gross weight. Temperature was 30C and elevation at the rim of the crater 5600 feet; density altitude pushing 10,000 feet. The rate of climb chart for the 150 shows about 150fpm in level flight. The crater width is about 3500 feet which would require about a 20 degree bank to circle in it, dropping the rate of climb to zero which is exactly what they found once down in the crater. They circled for over two hours trying to burn off fuel but finally crash landed in a more or less level area in the bottom. One pilot had a broken back and the other one less severe injuries. By that time they had quite a gallery of on-lookers and rescuers were already on their way down.
I do not fly at this time, I am considering pursuing a license. Wanted to do some research to make sure I was up to the challenge. I have seen most of your videos and I now have determine it's time for a discovery flight and enrolling in a school.
Fantastic lesson, all your tutorials are to the point and very professional and the best thing about it, is that it is easy to learn and understand , Thanks for all your help
Hello. In a few days I will start my LAPL Program and at this time I am studying by myself. I saw in the chart in the BUT learned how to calculate density altute only after watching your video. Keep up the good work! William
My first experience where Density Altitude made an impression on me was a trip out west. I was traveling to Santa Cruz, CA from Dallas, TX for the first long-range trip. I landed in Deming, NM for fuel and a food break. The Altitude of the airport is 4314 MSL and the Altitude of the Arlington, TX muni is 630 MSL. It was a hot summer day about 90 degrees when I landed. I told the lineman to fill r up and didn't even think about density altitude because I was the only one flying in the plane (plenty of wiggle room on the density chart).... Upon finishing my lunch, I hopped in the plane and took off down the runway only to notice how long my take-off run was and how my rate of climb was about 200 fpm..... Wow.... ! That's when I realized that Density Altitude was VERY important!
I'm studying for my private. I like your video but that's the "easy" real world way you explain it. Can you do a video explaining it so as to aid in answering the bass ackwards worded FAA test questions like this. "Determine the pressure altitude with an indicated altitude of 1,380 feet MSL with an altimeter setting of 28.22 at standard temperature." UG...they like to make it sooo confusing. Thanks!
Can you make a video of how you would answer the question below with the chart in this video. Because my ground instructor seems to be showing me the wrong way... Thank you in advance! (Determine the pressure altitude with an indicated altitude of 1,380 feet MSL with an altimeter setting of 28.22 at standard temperature.)
Not getting it, you said your altimeter setting was 28.0 so on the chart why did you go to the altimeter setting of 28.8 and even after going to the 28.8 you said the pressure altitude was 1253 when I see 1053 in that sense are u saying that the field elevation is 200 ft?
Thanks. That helped a lot. I usually use an equation but mastering the chart is required for the written test and I was having trouble figuring it out until your video.
What I hate about this chart is that it gives you APPROXIMATE density altitude. I don't understand how to follow the lines to an accurate number!? It's more like guessing the answer.... The microscopic squares don't help either😡 I'm getting wrong answers because of this. It's so frustrating... Anyone else feels the same or is it just me?
@@lukecartwright1803 I'm study for UAG using Gleim Aviation web site. It has a disclaimer about the chart and says to use the Flight Computer (like a circular slide-rule) instead. "The FAA will provide a density altitude chart for use during the knowledge test. This chart is identical to Figure 8 at the end of this subunit. Normally, you would use the right side of the chart to convert indicated altitude to pressure altitude; then you would use either the left side of the chart or your flight computer to convert the pressure altitude to the density altitude. However, the left side of Figure 8 is incorrect. Both in this study unit and on the FAA knowledge test, to convert pressure altitude to density altitude you must use your flight computer. If you use the left side of the chart in Figure 8 to convert pressure altitude to density altitude, you will get the wrong answer every time."
Jason,Talk a little about your routine prior to walking out to the aircraft to do the pretrip, I meant aircraft check out,weigh and balance and of course the Density altitude, Thx's Jason, Really enjoy your videos.
Why do you always use easy numbers? Instead of using the charted number or one directly in between, do examples using say 30.22 instead of 30, 31, or 30.5. Then show the math for interpolating a number like that cause that is the questions on test not the easy just take half of the numbers because its directly in between
It's a confusing chart, but you explain how to do it clearly. No where on the chart does it say add field elevation. That is why it is confusing. Also, there are no instructions.
Um im sorry to ask you about that but the Pressure Altitude refers to 1013hPa/ 29.92 inHg... when you want to calculate the Pressure Altitude you apply: PA = ELEV- (Altimeter setting - 29.92) x 1000.. That would make us a PA of 2120 ft....when you have an ELEV of 200ft... because the standard datum plane is lower than the altimeter setting (plane), which is lower than QFE (inHg) .. therefore you have to add QNE (ft) and ELEV and this makes the PA. How comes theres a PA of 1824 ?
thank you very much jecney for this perfect video about the density altitude chart and we wish and waiting for another videos about the remaining performance charts
Some of us don't know what density altitude is' used for, I actually do but I'm sure someone else can do a better job, if I missed something, excuse me.
There are so many questions you need to answer and probably you need to shoot another video for that for instance you need to have a board and write down doors and calculated to the guys that like to have those in visual scene also you need some questions and answer it also you need to tell us what the temperature is not on the chart that it is more than 43 or what if the the pressure altitude is not there or is too 28.25 how we fix those there's a lot of things you need to work on it should have better video I'm not trying to tell you that you're not doing a good job I'm just trying to tell you that there are so many things you need to work on it thank you
Hello you said basically , I crossed America. Did you visit Chile on the trip. Or you are conditioned by paid TV Radio and name the United States of America just America. Saludos
this is not practical for the test!!! the test would never give you exact numbers on the chart. he needs to explain the fourmula for getting the pa between the exact numbers.!!
You need to extrapolate. So if the altitude setting is 29.85 (not an exact number on the chart) then you need to calculate between the pressure altitude conversions related to 29.8 (112) and 29.9 (20). The diff between 112 and 20 is 92. Half way between 112 and 20 is 112-46 = 66. So the pressure altitude conversion of 29.85 is 66.
I used to fly at Black Forest Gliderport in Colorado (Elevation 7200 feet) and we would often have pilots fly in to fly gliders. It's amazing at how often we would hear someone trying to start their injected engines with an OAT of 85-90°F and could not get them to run. They would start, belch black smoke an die. They had no idea how to crank a complex engine with a density altitude of around 10,000 feet. One of the instructors would usually go out to where they were parked and help them get going. I tried to help a guy flying a Baron but was told he didn't need some Cub pilot telling him how to fly. He got one engine running and sat there cranking on the other one until he burned the starter out.
Helo pilot in southern Arizona. Studying for CFI and looking for resources. Your presentation was spot on, focused, and a great reference. Thank you for taking the time! Much appreciated here in hot desert
Excellent to say the least, I have paid ground instructors to explain this to me, but you make it easy.
Thank you
As a CFI, I commend you on the clear and precise explanation of a density altitude chart. I found your channel while doing research on the story of two airline captains on a delivery flight of a new Cessna 150 and decided to descend into the famous meteor crater near Winslow, Arizona, where they crashed when they couldn't climb out. I did a little reverse engineering and came up with two grown men with luggage and full tanks (topped off at Winslow) put the 150 at about max gross weight. Temperature was 30C and elevation at the rim of the crater 5600 feet; density altitude pushing 10,000 feet. The rate of climb chart for the 150 shows about 150fpm in level flight. The crater width is about 3500 feet which would require about a 20 degree bank to circle in it, dropping the rate of climb to zero which is exactly what they found once down in the crater. They circled for over two hours trying to burn off fuel but finally crash landed in a more or less level area in the bottom. One pilot had a broken back and the other one less severe injuries. By that time they had quite a gallery of on-lookers and rescuers were already on their way down.
Made things a lot easier for me to understand than the Gleim books. Thanks for making this video!
Look how young you are lol. I didnt know you have been making these videoes this long. Thank you for all of the content over these years.
I do not fly at this time, I am considering pursuing a license. Wanted to do some research to make sure I was up to the challenge. I have seen most of your videos and I now have determine it's time for a discovery flight and enrolling in a school.
Fantastic lesson, all your tutorials are to the point and very professional and the best thing about it, is that it is easy to learn and understand , Thanks for all your help
Hello. In a few days I will start my LAPL Program and at this time I am studying by myself. I saw in the chart in the BUT learned how to calculate density altute only after watching your video. Keep up the good work! William
The density altitude chart that you are using for this example, is that found in the pilot operating handbook for the particular airplane to be flow.
My first experience where Density Altitude made an impression on me was a trip out west. I was traveling to Santa Cruz, CA from Dallas, TX for the first long-range trip. I landed in Deming, NM for fuel and a food break. The Altitude of the airport is 4314 MSL and the Altitude of the Arlington, TX muni is 630 MSL. It was a hot summer day about 90 degrees when I landed. I told the lineman to fill r up and didn't even think about density altitude because I was the only one flying in the plane (plenty of wiggle room on the density chart).... Upon finishing my lunch, I hopped in the plane and took off down the runway only to notice how long my take-off run was and how my rate of climb was about 200 fpm..... Wow.... ! That's when I realized that Density Altitude was VERY important!
I'm studying for my private. I like your video but that's the "easy" real world way you explain it. Can you do a video explaining it so as to aid in answering the bass ackwards worded FAA test questions like this.
"Determine the pressure altitude with an indicated altitude of 1,380 feet MSL with an altimeter setting of 28.22 at standard temperature."
UG...they like to make it sooo confusing.
Thanks!
same problem here lmao
Pressure Altitude = 3,080
Can you make a video of how you would answer the question below with the chart in this video. Because my ground instructor seems to be showing me the wrong way... Thank you in advance! (Determine the pressure altitude with an indicated altitude of 1,380 feet MSL with an altimeter setting of 28.22 at standard temperature.)
Not getting it, you said your altimeter setting was 28.0 so on the chart why did you go to the altimeter setting of 28.8 and even after going to the 28.8 you said the pressure altitude was 1253 when I see 1053 in that sense are u saying that the field elevation is 200 ft?
@ 0:58 I have heard others say the same thing for pressure altitude.
Once again you re saving my life, thank you so much for this simple explanation videos they are really great.
Knowing the density altitude is well and good but you didn't mention what it does to the horsepower of the engine and takeoff distance.
great method.. getting my check-ride soon and trying to review. this is really helpful
This helped me a ton in prep for my PAR! Thanks.
Thank you! I am in an Aviation Science class and this helped!
Thanks. That helped a lot. I usually use an equation but mastering the chart is required for the written test and I was having trouble figuring it out until your video.
Thanks to your video finally figured it out! I was forgetting to add the field elevation to the pressure altitude conversion factor!
Density altitude is so easy to do, but it is also easy to forget. Thanks for the info.
Of course - glad it was helpful. Thanks for watching!
What I hate about this chart is that it gives you APPROXIMATE density altitude. I don't understand how to follow the lines to an accurate number!? It's more like guessing the answer.... The microscopic squares don't help either😡 I'm getting wrong answers because of this. It's so frustrating... Anyone else feels the same or is it just me?
same its driving me nuts!! there are fourmulas for getting exact density altitude but they give me the wrong answers!!
@@lukecartwright1803 I'm study for UAG using Gleim Aviation web site. It has a disclaimer about the chart and says to use the Flight Computer (like a circular slide-rule) instead. "The FAA will provide a density altitude chart for use during the knowledge test. This chart is identical to Figure 8 at the end of this subunit. Normally, you would use the right side of the chart to convert indicated altitude to pressure altitude; then you would use either the left side of the chart or your flight computer to convert the pressure altitude to the density altitude. However, the left side of Figure 8 is incorrect. Both in this study unit and on the FAA knowledge test, to convert pressure altitude to density altitude you must use your flight computer. If you use the left side of the chart in Figure 8 to convert pressure altitude to density altitude, you will get the wrong answer every time."
Jason,Talk a little about your routine prior to walking out to the aircraft to do the pretrip, I meant aircraft check out,weigh and balance and of course the Density altitude, Thx's Jason, Really enjoy your videos.
Why do you always use easy numbers? Instead of using the charted number or one directly in between, do examples using say 30.22 instead of 30, 31, or 30.5. Then show the math for interpolating a number like that cause that is the questions on test not the easy just take half of the numbers because its directly in between
Confusing..... So you add "pressure altitude conversion factor" (1053) to your density altitude?
How can I download the density chart that is in your video. Thanks for the instruction!!
it is available on google bro or else go to his website you will find it somewhere there happy landings
and find density altitude if an aircraft fly at 10,000 ft with the outside temperature 4 degree celcius
It's a confusing chart, but you explain how to do it clearly. No where on the chart does it say add field elevation. That is why it is confusing. Also, there are no instructions.
Um im sorry to ask you about that but the Pressure Altitude refers to 1013hPa/ 29.92 inHg... when you want to calculate the Pressure Altitude you apply: PA = ELEV- (Altimeter setting - 29.92) x 1000.. That would make us a PA of 2120 ft....when you have an ELEV of 200ft... because the standard datum plane is lower than the altimeter setting (plane), which is lower than QFE (inHg) .. therefore you have to add QNE (ft) and ELEV and this makes the PA. How comes theres a PA of 1824 ?
thank you very much jecney for this perfect video about the density altitude chart and we wish and waiting for another videos about the remaining performance charts
Why not just set 29.92 to get the pressure altitude on the altimeter and just correspond that altitude gotten with the temp ?
As a student heli pilot, what in English does the number of approx. density alt. really mean? Thanks so much.
Clear and simple explanation. Thanks!
Video starts at 1:40 so you don't have to waste time like I did.
You were a baby here!
I have learnt a lot from Jason's videos
dude thank you for making that easy to understand!!
And I totally agree with a good pilot is always learning
this is really so simple but I'm struggling to get it for my written test prep :L your video is helpful, thank you!!
Thanks MZA, helpful video!
Thank you. You are a good teacher.
I noticed that to, but yes field is 200 he's saying. i think he messed up.
Wow. This is vintage Jason
sure is!
I'm flying through Ground School because of your videos. Thanks!
Yeah you really broke that down nice and simple I appreciate
Thanks a lot for your explanation
En español?
Thanks mein really helped me out
You might as well define pressure altitude while you explaining density altitude. that ways we can see the difference
Some of us don't know what density altitude is' used for, I actually do but I'm sure someone else can do a better job, if I missed something, excuse me.
Makes it clear. Thank you.
There are so many questions you need to answer and probably you need to shoot another video for that for instance you need to have a board and write down doors and calculated to the guys that like to have those in visual scene also you need some questions and answer it also you need to tell us what the temperature is not on the chart that it is more than 43 or what if the the pressure altitude is not there or is too 28.25 how we fix those there's a lot of things you need to work on it should have better video I'm not trying to tell you that you're not doing a good job I'm just trying to tell you that there are so many things you need to work on it thank you
Thanks for the feedback! We always strive to do better! Fly safe!
Nice.
Thank you
awesome. thanks for this tutorial.
Hello you said basically , I crossed America. Did you visit Chile on the trip. Or you are conditioned by paid TV Radio and name the United States of America just America. Saludos
this is not practical for the test!!! the test would never give you exact numbers on the chart. he needs to explain the fourmula for getting the pa between the exact numbers.!!
You need to extrapolate. So if the altitude setting is 29.85 (not an exact number on the chart) then you need to calculate between the pressure altitude conversions related to 29.8 (112) and 29.9 (20). The diff between 112 and 20 is 92. Half way between 112 and 20 is 112-46 = 66. So the pressure altitude conversion of 29.85 is 66.
I think it because he so into it he luvs it I get it witch is ok
Nice job, again..
He does blabber but he noes his shit
Good stuff
excellent video simple and clear explanation, thx a bunch for this upload :)