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Turbine Duke airspeed question

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Last week I've bought the Realair Turbine Duke and I'm a bit confused about the maximum airspeed.

On the info page, on the Realair website, it says this aircraft has a max airspeed of 300kts TAS and to me this seems pretty fast for such a small aircraft. Especially since the airspeed indicator has a maximum of a little over 200kts, with a red line at 200kts. So my guess would be that the 300kts might be a typo...

 

I've been looking through the documentation, but I cant find any performance tables. So when flying, I simply keep the airspeed below the red line at 200kts, but still I keep over-stressing the aircraft.

 

Could someone tell me what the actual maximum airspeed is, or maybe even point me to a performance table for this aircraft?


Cheers!

Maarten

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Last week I've bought the Realair Turbine Duke and I'm a bit confused about the maximum airspeed.

On the info page, on the Realair website, it says this aircraft has a max airspeed of 300kts TAS and to me this seems pretty fast for such a small aircraft. Especially since the airspeed indicator has a maximum of a little over 200kts, with a red line at 200kts. So my guess would be that the 300kts might be a typo...

 

I've been looking through the documentation, but I cant find any performance tables. So when flying, I simply keep the airspeed below the red line at 200kts, but still I keep over-stressing the aircraft.

 

Could someone tell me what the actual maximum airspeed is, or maybe even point me to a performance table for this aircraft?

 

I think you're confusing True Airspeed with Indicated Airspeed. Your IAS may only be 180 kts, but you can easily travel at 280 kts true airspeed in the Turbine Duke.


Jon Skiffington

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Thanks, Jon. I also just found a post mentioning the Turbine Duke can indeed do 290kts, but at 29000ft and so far I didnt take the aircraft over 10000ft. So I'm going to take the aircraft up higher and keep the 180kts IAS in mind and see what it does.


Cheers!

Maarten

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Keep in mind you can easily cruise at 198 knots with higher fuel burn of course and in turn get a higher true air spneed.

 

Also keep in mind that aircraft is only certified up to FL250 without oxygen which is what this aircraft is....but you can pretend whatever you want of course that's the fun of simming

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Thanks Brett. For the past 2 years, I've been mostly doing the low&slow-thingy, so these kind of tips are most welcome. For starts I'm not too worried about things like oxygen, so I can take my time to familiarize myself with the aircraft, but after a couple of learning flights, I indeed like to get into the real procedures as much as I can.


Cheers!

Maarten

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Last week I've bought the Realair Turbine Duke and I'm a bit confused about the maximum airspeed.

On the info page, on the Realair website, it says this aircraft has a max airspeed of 300kts TAS and to me this seems pretty fast for such a small aircraft. Especially since the airspeed indicator has a maximum of a little over 200kts, with a red line at 200kts. So my guess would be that the 300kts might be a typo...

 

I've been looking through the documentation, but I cant find any performance tables. So when flying, I simply keep the airspeed below the red line at 200kts, but still I keep over-stressing the aircraft.

 

Could someone tell me what the actual maximum airspeed is, or maybe even point me to a performance table for this aircraft?

 

What you see on airspeed indicator is indicated airspeed (IAS). 

You can calculate true airspeed (TAS) suing this http://www.csgnetwork.com/tasinfocalc.html


flight sim addict, airplane owner, CFI

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Thanks Brett. For the past 2 years, I've been mostly doing the low&slow-thingy, so these kind of tips are most welcome. For starts I'm not too worried about things like oxygen, so I can take my time to familiarize myself with the aircraft, but after a couple of learning flights, I indeed like to get into the real procedures as much as I can.

 

 

In real life, the flight profile for this aircraft is to get high as fast as you can (where your TAS will be far higher than the IAS) and descend as late as practical.  This is a plane that would only be flown in the flight levels for a trip of any distance.  Down low, it's too restricted in airspeed and the fuel burn would be far too great for the allowable speeds.  But as others have noted, the key is the difference between TAS and IAS at high altitudes.

 

BTW, if you'd prefer a similar aircraft that would be a bit more practical at somewhat lower altitudes, consider the v2 Piston Duke.  While still mostly intended to go reasonably high, it's not quite so impractical to stay in the low-mid teens on longer trips and even lower for shorter hops.  And like the Turbine Duke, it's an excellent model.  It is, in fact, my favorite plane!

 

Scott

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Thanks for the info.

 

I've got plenty of low&slow aircraft and I bought this one to have something different in my hanger as well. But this is a new aircraft and it has some new things I have to learn.

And as soon as the B60 will be released for P3D, I will get that one as well. I'm starting to really like the Dukes.


Cheers!

Maarten

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You can use the dial on the airspeed indicator. Let's say you're at 24000ft and temp is -35celcius then dial in 24 (k feet) and center the 24 under where the line for -35c is.


-Roland

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