enable realistic startup in P3D v4

[FDEdev 955]

Noticed that Carenado has the option for a realistic engine start (P3D4v) in the cfg file, but commented these lines for some reason out.

If you change it the following way you will have a nice slow spool up with basically no RPM and torque overshoot.  Engine response will be a faster as well.

[TurbineEngineData]
fuel_flow_gain.0 = 35, 0.001              
fuel_flow_gain.1 = 40, 0.008
fuel_flow_gain.2 = 65,  0.01
fuel_flow_gain.3 = 69,  0.04  
//fuel_flow_gain          = 0.03     

[dfeldman 35]

Cool thank you. Any idea if this would work for Carenados other turbo props?

Dave.

[FDEdev 955]

Yes, but you have to carefully adjust those RPM/fuel flow values for each aircraft/engine/prop combination by experimenting.

[dfeldman 35]

Understood. Thank you.

Dave.

[SquawkModeCharlie 32]

Great find!, the over torque and the other startup issues were getting really annoying!.

[Iceman2 110]

Great thanks 🙏 

Any idea if these values work on other turboprops?

Obviously the values will need tweaking but I have other Aircraft that need this attention too.

IM

[FDEdev 955]

This works with all turboprops in P3Dv4. The last value should be the RPM just a tad below idle.

Check the actual idle RPM and use this value (or a tad below idle) for the last line. It determines the engine acceleration during flight.

With the other values you can experiment to achieve the desired spool up speed and smoothness.

You can even add a 5th line if needed.

Hope this helps 🙂

[Iceman2 110]

Just tried it on the Turbo Commander 690.

Watched a video online from a real one and matched the startup rotation rate.

Worked like a treat.

Awesome thanks.

 

[FDEdev 955]

That's great 👍

[RobertBernardK 7]

5 hours ago, Iceman2 said:

Just tried it on the Turbo Commander 690.

Watched a video online from a real one and matched the startup rotation rate.

Worked like a treat.

Awesome thanks.

 

hi, where and what lines, values, you added to the aircraft.cfg in the 690B? for testing too, 

 

Redgars

Robert Bernard

[FDEdev 955]

1 hour ago, RobertBernardK said:

hi, where and what lines, values, you added to the aircraft.cfg in the 690B? for testing too, 

Just tried and you can use the values from the 360 🙂

Simple delete the single fuel_flow_scalar line and exchange it with the 4 lines from the 360.

[Gabe777 132]

Stoopid question - I have the do228 - but if this potentially improves realism, why did they comment them out ?

Are they deliberately dumbing it down ?

[FDEdev 955]

9 minutes ago, Gabe777 said:

Are they deliberately dumbing it down ?

No. Just checked and when you install the P3D version the cfg file is the correct version. I'd assume that they initially simply forgot to exchange the FSX cfg in the P3D package.

Edited October 14, 2018 by J35OE

[Gabe777 132]

OK, I'll check it out on my Carry twins.

Kudos to you guys for spotting and sorting !

Cheers.

[Gabe777 132]

On 8/26/2018 at 3:26 PM, J35OE said:

Noticed that Carenado has the option for a realistic engine start (P3D4v) in the cfg file, but commented these lines for some reason out.

If you change it the following way you will have a nice slow spool up with basically no RPM and torque overshoot.  Engine response will be a faster as well.

[TurbineEngineData]
fuel_flow_gain.0 = 35, 0.001              
fuel_flow_gain.1 = 40, 0.008
fuel_flow_gain.2 = 65,  0.01
fuel_flow_gain.3 = 69,  0.04  
//fuel_flow_gain          = 0.03     

Daft question, but is that bottom line meant to be still commented out ?

 

Thnx again.