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.

http://www.ntps.edu/information/downloads.html

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