t-34 calibrated airspeed

[goose18557]

As everybody knows calibrated airspeed is IAS corrected for instrument error. Where can I find a chart that shows calibrated airspeeds for the T-34

 

[scoober78]

There is no single chart because CAS would vary for every aircraft. Instruments and installations will have individual variation so...no NATOPS chart.

One of the more experienced guys may chime in here, but I suspect that every BUNO...somewhere in its paper trail, may have a CAS chart...for that BUNO.

 

[TheBubba]

Something like that would be different in every aircraft you'll fly...

That being sad, why do you need it?

 

[goose18557]

In order to calculate TAS on the wiz wheel you need CAS, Pessure Altitude, and Temperature. If you know of a different way to calculate TAS I'm all ears

 

[kmac]

The gouge method: TAS= 4 kts for every 1000', added to IAS.

 

[scoober78]

Use the one given in the problem....

Or, alternatively, use IAS...you are missing the forest for the trees.

 

[squirt]

Just use the IAS for the CAS. If there is so much instrument error to change your ETE...there is something seriously wrong with that plane.

 

[Gatordev]

Yes, IAS=CAS as far as anyone is concerned. As Scoober said, make it even easier on yourself and use the airspeed in the problem and don't over-think it too much.

I would NOT recommend using the 4 knots/1k' rule when doing problems for tests. That's just good gouge for real world ops when you're not being graded.

 

[McCPilot]

Wouldn't the "4 knots per 1k feet" method only apply at a certain airspeed? I'm not questioning you guys and your (the Navy’s) methods, but isn't Indicated -> Calibrated a bigger deal at lower airspeeds, due to the (sometimes drastic) change in AOA and the relative wind on the pitot tube? Or does the t34 have a swiveling pitot? Of course larger AC solve the problem by decreasing the angle of the pitot as their AOA increases, just didn't think the 34 was that advanced... not complaining, it'll be nice not having to worry about ias -> cas

 

[MasterBates]

NERDS!!!!!

 

[montellv]

MasterBates...THAT WAS AWESOME!

This seems like some kind of Prowler ECMO conversation.

Tron: "I was only jamming X, Y, and Z...can you believe it. Those stupid hornet guys!"

 

[McCPilot]

Lol, sorry... just enjoy talking aerodynamics and stuff. Disregard my last post, didn't mean to get so deep.

BTW how'd you get my picture???? :-p

 

[TheBubba]

From the 'FO:

The 4Kts per 1k' is good gouge for any airspeed.

You definitely don't need to know CAS to get TAS... done it a million and a half times over the past few years...

The other thing is that there's a little chart in the back of the PCL that gives IMN and IAS for TAS for various altitudes and temperatures... you'll end up using that over the whiz wheel... I haven't used a whiz wheel in the airplane in a little over a year. In the plane, you'll need to find IAS for TAS... all you need on the whiz wheel for that is temp and altitude.

 

[cisforsmasher]

and just think, the t-45 doesnt even have a temperature probe so there will be no need to bring a whiz wheel. But i think CAS may be listed inside the t-34, near where the magnetic deviation chart is. Right side, near where the ashtray used to be. Of course, some may have fallen off but you can always ask maintenance, it's their job to know aircraft details like that.

 

[KBayDog]

The gouge method: TAS= 4 kts for every 1000', added to IAS.

The 4Kts per 1k' is good gouge for any airspeed.

Let's see: That formula would put me at...hmmm....(uh...carry the one...uh...ah....a-ha!)

I figured it out:

TAS = KIAS + 1 Kt!