You DON'T Need an E6B Flight Computer (PPL Lesson 48) 

6 minutes is 0.1h. Flying at X kts means X/10 nm every 6 minutes. Any time/distance/speed calculation you can approximate using 6 min "chunks" without any calculator with sufficient practical precision. Also distance covered in 10min=X/6 nm, in 15min=X/4 nm, in 20min=X/3 nm, and obviously in 30min =X/2 nm

E6-B is still a good foundation when first learning in the classroom. . Then ditch it for electronic and even rule of thumb.

Seriously, everything about these videos - they just get better. The perfectly rad music, the visuals, your calm and clear voice. Thank you, thank you. My dad's a retired captain for United Airlines, my bro's a certified instructor with a Cessna and because of your videos, this single lady artist can learn all I need and carry on the family legacy without digging deeper into debt. You rock more than words can say - life changing. Thank you to you and Mike! Ya probably don't need it, but feel free to quote me and would love to check out your app when it happens. -Molly M.

20:40 easy calculation of true airspeed As a CFII since the late 60's , I have taught this method: 1) the true airspeed is the product of the CAS, approximated by the indicated airspeed times the RDR. RDR ? This is the root density ratio: Square root of (sealevel density divided by the density at the indicated flight altitude). This RDR is so simple that it is easy to memorize: altitude (ASL) RDR temperature 0 1.00 15 C 3000 ft 1.05 9 C 6000 ft 1.10 3 C 9000 ft 1.15 -3 C 12000 ft 1.200 -9 C 15000 ft 1.26 -15 C 18000ft 1.33 -21 C This is accurate as long as Your rule of the temperature outside is applicable: third column. When the outside temperature differs , then a correction can be used : by example at 12000 feet instead of -9 C say the OAT is +6 C, a difference of + 15° 15 divided by 264, ( -9C in °Kelvin) is approximately 5.6% . Then the calculated TAS, incremented by ½ 5.6% = 2.8% is the accurate TAS, as you can verify on your computer. As you can verify all other factors on the table. Any error is due to the difference of indicated to calibrated airspeed. This is an accurate method that makes the calculation of density altitude for True airspeed unnecessary. It is based on exact computation of the density for the ISA . Used for the design of the scales on the flight computer directly.

Bro, I just want to shake your hand 🤝🏼 amazing! Thank you for all of this 👍🏼

another good video. Thanks for that. I'm talking a short flight today, and I will keep this all in mind.

Holy crap! thank you, High res and well produced! thank you so much this was really pissing me off trying to figure out. Army proof...nice

There is also a basic trigonometry way to determine wca and gs as well. With help of the sinus rule we can determine all sides and angles of a triangle if we know 2 sides and 1 angle. TAS/sin(windangle) = WS / sin (wca) where TAS Is true airspeed, windangle is the angle between true course and winddirection, WS is windspeed and wca is wind correction or drift angle. If wca is known the 3rd angle of the triangle is known because 180 - WA - wca = 3rd angle. And with that we can also calculate the GS (eg third side) by same sinus rule.

Really bagging on us Army Aviation vets lol Great video man!

Love the river tour!

This was a great video! Thanks!

I think it's easier to look for pattens. For example: 7.5 gallons in 45 minutes, how many gallons per hour? 45 minutes is 3/4 of an hour, 7.5 is 3/4 of 10, so 10 gallons per hour. This gives indications If you can't completely figure it out in a few seconds, and you can verify it using a calculator In complicated engineering problems, you often use a computer to figure it out by simulating or doing a few steps or so, but you should be aware of what kind of number you should expect, so that's when I use this kind of estimation

Thanks!

You can use a calculator to figure crosswind and headwind components using Sin and Cos functions as well. Personally I think it is quicker.

im used to CRP5, so actually for me personally its quicker to be using crp5 because im familiar with it. heard its expensive at europe and USA but at malaysia its super cheap. but now im using the crp5 apps instead of the physical one

Useful video I wish I knew this channel months ago

Simply use T(time) = D(distance)/V(velocity) formula.

Interesting video and informative. I always want a backup to whatever system I am using. Analog to my digital electronic navigation. I actually prefer paper charts, my E6B and plotting , dead reckoning and pilotage to my GPS. But if any system fails have a backup, even if it is doing calculations in my head.

Thanks for sharing. Great video. Just one more question. Assuming inoperative GPS and calculating for a diversion how can you tell the NM travelled in a minute to find the GS? I cannot think of a way without the GPS and no planned checkpoint as well since it is going to be a diversion.

Thanks for your great video but should the ISA temperature not be 15 - 1.732/1.000x2 = 11.536 C ?

Thank you very very very much 🙏, you saved 💰 🙏

Wind correction the way you are doing it is called set and drift. It’s pretty much the same for boating. It’s how I do it. But I note how far off course I have sailed or flown in a certain amount of time. Note where I am off course, mark it. Then I draw a line from where I calculated from where I should have been to where I am . Note the distance. As set is the direction off your vector, and drift is distance and time. Now you can set up for an intercept of your old course or draw a new line to your destination and adjust your heading from there.

All of these methods are nice during planning phase for sure. Question is: will my DPE blast me for whipping out my phone or calculator to do some of these conversions or will they prefer e6b? Personally e6b is close enough and fast enough that I’d prefer it unless the mental math is nice and round… maybe it’s just me

Is it possible to use a normal ruler and protractor on a piece of paper for wind calculations if we don't have a plotter?

ANOTHER AWESOME video. LOVE the content, your explanations make it easy to follow. Now ... I gotta PRACTICE. Really looking forward to your next video .. x-country and pilotedge. THANK YOU CYQT 👍🇨🇦👍

Retired Army guy here. Thanks for the rides AF! 😆

Hey Josh-- great video! I have come across another formula to determine Density Altitude. I think I found this on a web site about the affect of Density Altitude on ballistic bullets for those long range targets. The formula does not involve calculating ISA Temp. just need Outside temp in Celsius. 1.24(PA) + 118.8(OAT) -1782 = DA PA= Pressure Alt. OAT= Outside Air Temp in Celsius DA= Density Alt You can easily calculate PA by the following: PA= (29.92-Baro)X1000 + Field Elevation Just watch that you have a negative number if current Barometric Pressure is greater than standard .

It's very useful video for me because I am not a pilot, yet )

I think at 19:49 the interpolation is wrong; you say 12.3 C which I believe is at 1,372 instead of 1,732; temp should be ~11.536 C. Right?

I must be mistaken all these years. Now mind you, I'm not arguing safety, merely legality. You can't land with less than your reserve of fuel? I thought you can't take off with the calculated needed fuel plus the reserve. Using some of your reserve is not illegal.

Maybe a nitpick, but want to ensure my math isn't whack. For the formula at 19:50, to find standard temp at altitude of 1732, I should subtract 3.464 from 15 to get 11.536. But you have 12.3. It's 2 degrees per 1k, and we have 1.732k, right?

where are the links

Pilot nav is perfect in flight. ln fact l expect my students to use mental arithmetic. Unfortunately today, those entering aviation have little mental arithmetic ability due to reliance on electronic devices. These electronic devices are fine until the the batteries go flat. Then they are in trouble.

I don't think your ISA temp. for the calculating density altitude problem (19:40 mark) is correct. It's a linear variation with altitude, a 1,732 foot elevation is much closer to 2, 000 feet, than 1,000 feet, so your ISA temp. should be much closer to 11 degrees C, than 13 degrees C. Using the ISA temp. calculation formula you get 11.5 degrees C. Which matches eyeballing where it should be.

But I like my E6B Computer however this was a very very Informative video

Great videos but could you look into your audio setup please? Your sound level is very low, so low that we need to turn up the volume to hear you and then when an ad comes in, it's blaring. Could you also double check your music overlay volume is lower than your voice? need to rewind to make out what your saying.

I never thought I'd prefer the whiz wheel for anything until now.

Are we supposed to do this kind of Math in our heads? I cant divide 10 by 60 and get 1.833 for example LOL . So for me the E6B is just easier. Most of the examples were just complex. divide these 2 numbers then multiply by this number which of course included fractions. Or am I missing something?

It's not illegal to land an aircraft with less than 30 minute reserves onboard (Part 91-VFR NOTE: IFR wording makes it a bit more legally "sticky"). The regs only govern the flight planning portion. That being said, I'm not advocating running to empty and not trying to start a conversation about what's smart and what's not, just pointing out a common piece of mis-information. Cheers!

Real talk, is it worth it to just buy the e6b?

My head hurts. DIY MAN is so much easier! There is math there too, but knot like this! True altitude does not lie?!

Small private planes need to be as easy to operate as passenger cars. Get in and go. With onboard computers making flightplans and managing fuel and systems. In an unsafe condition , such as insufficient fuel, the computer would let you know to land and reccomend where. Right now this is far too complex, risky, error prone for general aviation to grow.

Who can divide 130 by 1.83 in their head? best to keep that flight computer handy.

Correction. You are required to know how to calculate density altitude. Source my instructor

Oeps sorry, you already answered this questions.

You don’t need fuel😎

Wtf lol

Hmm, congratulations you've discovered 6th grade unit analysis, now you can put those 2nd grade math skills to use. If you need to explain this to someone who is flying or wants to fly, do it in airspaces far away from me.

Thanks!

Thanks!