Carenado TMB 850 Cruise speed

[Hedgehog22 2]

Has anyone be able to achieve a level flight speed of over 233kts in Carenado’s TMB 850 Turbo prop.

Real life figures quote that it is capable of near 300 kts, however I have never been able to get it over 233 kts.

Any idea how?

 

Thanks

[FDEdev 955]

Confirm you have the flap lever at the 850 position so as to achieve the maximum torque (121%)? Above FL250 this will result in a cruise speed of more than 300ktas 

[Hedgehog22 2]

I will try that, thank you so much:)

[FDEdev 955]

AFAIR, if the throttle was already at 100% and you move the flap lever to the 850 position, you have to pull the throttle a tad back at first and afterwards advance it to the 'new' 100% position.

[Hedgehog22 2]

Cheers, I will look out for that. I assume that you have to use the mouse to "Grab" and move the flap lever. No key assignment for a joystick. I will try it tonight:)

[Hedgehog22 2]

I really appreacate your help, but not getting much further: Got 250, can you think of anything I am doing wrong, at 2500 alt, 850 position, 100% throttle, 100% Propeller and 100% condition levers. Set the weather to fair no wind. Level flying. Would include a screenshot but cant work out how to get one uploaded.

Many thanks again

 

[Hedgehog22 2]

 

Try this?

[FDEdev 955]

Erm, you are approximately 20000ft too low to achieve 300ktas. Performance is measured in true airspeed TAS, not indicated airspeed IAS.

(Btw, wind has zero effect on IAS/TAS)

[Hedgehog22 2]

I tried at 25,500 with the same (no worse) results:(

[scottb613 1,188]

Hi...

Looking at your last shot - you're doing 311 Knots TAS if I'm reading it correctly - as altitude increases - less air molecules hit your pitot tube - therefore indicated goes down - - - below your speed strip - there appears to be an indicator for TAS - use that for reference...

Regards,

Scott

[Hedgehog22 2]

I see the TAS below, magic. Thank you both so much. Very helpful for a twit such as myself:(