#### Numbers question TAS

Mike Dwyer

We can measure our TAS at some Altitude, say 3000' and temperature say 63F, by flying in three different directions (say 0, 120, 240 degrees) and averaging the GPS reading.  This would be our True Airspeed at 3000' and 63 F right?

So how can we calculate our speed at sea level and 59F (standard definition)?  I Googled it and came up empty.

I've been using an old Cessna performance chart and eyeballing it.

There must be a way to calculate it...  Any math guys out there!

Fly Safe,

Mike Dwyer  N3QP Q200

Q200 Website: http://goo.gl/V8IrJF

Larry Severson

Use your E6B (mechanical or electrical). The instruction manual will get you there.

From: Q-LIST@... [mailto:Q-LIST@...]
Sent: Tuesday, March 1, 2016 1:54 PM
To: Q-LIST@...
Subject: [Q-LIST] Numbers question TAS

We can measure our TAS at some Altitude, say 3000' and temperature say 63F, by flying in three different directions (say 0, 120, 240 degrees) and averaging the GPS reading.  This would be our True Airspeed at 3000' and 63 F right?

So how can we calculate our speed at sea level and 59F (standard definition)?  I Googled it and came up empty.

I've been using an old Cessna performance chart and eyeballing it.

There must be a way to calculate it...  Any math guys out there!

Fly Safe,

Mike Dwyer  N3QP Q200

Q200 Website: http://goo.gl/V8IrJF

Jay Scheevel

Mike,

If you fool around with the following online calculator, you can get your answer.

TAS Calculator

Cheers,
Jay

Sam Hoskins

National Test Pilot School has a reliable method. Go here to read the paper and download the spreadsheet.

My Dynon has an integrated true airspeed indicator, I think that's pretty accurate

Sam

Sent via wireless gizmo.

On Mar 1, 2016 1:53 PM, "Mike Dwyer q2pilot@... [Q-LIST]" <Q-LIST@...> wrote:

We can measure our TAS at some Altitude, say 3000' and temperature say 63F, by flying in three different directions (say 0, 120, 240 degrees) and averaging the GPS reading.  This would be our True Airspeed at 3000' and 63 F right?

So how can we calculate our speed at sea level and 59F (standard definition)?  I Googled it and came up empty.

I've been using an old Cessna performance chart and eyeballing it.

There must be a way to calculate it...  Any math guys out there!

Fly Safe,

Mike Dwyer  N3QP Q200

Q200 Website: http://goo.gl/V8IrJF

Jerry Marstall

E6B

From: Q-LIST@... [mailto:Q-LIST@...]
Sent: Tuesday, March 1, 2016 4:54 PM
To: Q-LIST@...
Subject: [Q-LIST] Numbers question TAS

We can measure our TAS at some Altitude, say 3000' and temperature say 63F, by flying in three different directions (say 0, 120, 240 degrees) and averaging the GPS reading.  This would be our True Airspeed at 3000' and 63 F right?

So how can we calculate our speed at sea level and 59F (standard definition)?  I Googled it and came up empty.

I've been using an old Cessna performance chart and eyeballing it.

There must be a way to calculate it...  Any math guys out there!

Fly Safe,

Mike Dwyer  N3QP Q200

Q200 Website: http://goo.gl/V8IrJF

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