In this video, I go over how to calculate your True Airspeed during the climb portion of your cross-country flight.

This is the point of your cross-country planning where you have found all your checkpoints, the distances to each checkpoint, and the expected altitude at each checkpoint. This is a big step because now that you have all your altitudes, you can find the expected winds aloft, temperature aloft, and weather aloft at those altitudes.

Now that you have your expected altitudes and the weather associated with those altitudes you are ready to start calculating your True Airspeed. Remember, your True Airspeed is your Calibrated Airspeed adjusted for non-standard atmospheric conditions so it is required for us to know the weather in order to calculate our True Airspeed.

There are two ways to come up with True Airspeed; using your performance charts or converting from a calibrated airspeed using an E6B Calculator. Both ways are valid but have different procedures. Using your performance charts requires you to know the power setting you will be flying at while using your E6B requires you to know the indicated airspeed you will be flying at.

Since most pilots target an indicated airspeed during climb (best rate of climb for example) I think it's easiest to use the E6B method of finding True Airspeed during climb. Then, for Cruise and Descent, I use the performance chart method since I will not be targeting an indicated airspeed during these stages of flight, but instead will be targeting a power setting (2500 RPM for example).

For most single-engine, trainer aircraft like a Cessna 152, Cessna 172, or Cherokee warrior the indicated airspeed will almost always match the calibrated airspeed give or take 1 or 2 knots. The calibrated airspeed is just the indicated airspeed adjusted for errors in the instrumentation. These errors are higher at higher speeds and for the aircraft that most student pilots are flying, the error is minimal. For this reason, you can assume that indicated airspeed = calibrated airspeed.

This way, you can use your targeted indicated airspeed to find true airspeed straight from your E6B. You just line up your pressure altitude with the temperature at that altitude (in Celcius) in the window in the middle right of the E6B then read off the true airspeed above indicated airspeed on the two outermost scaled on the E6B.

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🛫 Timestamps:
00:00 Intro
01:56 How do we get the Groundspeed from an Indicated Airspeed?
03:54 True Airspeed from Indicated Airspeed during Climb
04:14 A flight plan with Checkpoint information, Calculate the True Airspeed using E6B
05:01 Checkpoint 1, Step 1: Spin the wheel of the E6B…
06:12 Checkpoint 1, Step 2: Read your True Airspeed over Calibrated Airspeed, Find your Indicated Airspeed
07:00 Checkpoint 2: Steps 1 & 2
07:40 Why would we use Temperature and Altitude that we’re going to reach for the True Airspeed that we’re flying during the entire leg to the Checkpoint?

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