[XPLANE] DC-6 Supercharger inquiries

[CrashTronic 3]

It's a quick and dirty work around until/if PMDG decides to update the core functionality of the code. I'd be happy to help update the blower code and CHT profile and support it myself. I really do not want to see this airplane fall behind the xplane update cycle. As reference I did the twin otter from aerosoft updated and alternate FDE a couple of years ago with support from Aerosoft:
http://forum.aerosoft.com/index.php?/topic/88611-updated-fde-to-twin-otter-updated-2842015/
http://forum.aerosoft.com/index.php?/topic/94799-fsx-p3d-v1-dhc-6-300-wheels-alternative-fde-and-engine-simulation/


 

[alexcolka 183]

On ‎10‎/‎27‎/‎2017 at 6:21 PM, CrashTronic said:

New Changes to the high alt values. Tested at 19000 low blower auto lean for cruise

Hi CrashTronic,

Are those numbers valid for 11.05 as well? I remember when flying in XP10 the DC-6 at FL200 could easily pass the 200 kias (average weights) with AFE cruise settings and in XP11 this is not possible, perhaps because we can use the high blowers anymore, your comments will be appreciated on this.

Thanks,

[CrashTronic 3]

The performance seems to match high blower settings up to about FL190 in the low blower setting, I am using the 11.10 beta.  My testing indicates the airspeeds are pretty close to right.

@alexcolka please let me know if you find any discrepancies. If you do find one, please retest at "clear" weather settings (ISA) if you aren't there already and please send the aircraft altitude weight, airspeed, engine: RPM, BMEP, Fuel Flow, power, blower setting, and mixture setting. The altitude, engine power, fuel flow can be found in the data output screen of the settings and click show in cockpit.Thanks!

[alexcolka 183]

Great and thanks for your reply, I will test another flight and let you know later the flight data.

Cheers,

[alexcolka 183]

Hi CrashTronic,

I'm not a versed person for posting correctly my images of the test that are self explanatory for the data you are inquiring for this test. My results were negative, never reached the 200 KIAS @ FL190, using XP11.05 stable, using the ACF changes you suggested, clear weather and the data displayed you needed.

Hope this helps.

 

You can copy the links bellow and see the images on your browser, let me know if there is something wrong with the links.

"https://www.dropbox.com/s/bykr27jh2uo6suy/DC-6_1.jpg?dl=0"

"https://www.dropbox.com/s/cexw73td70dwfzk/DC-6_2.jpg?dl=0"

"https://www.dropbox.com/s/rlskkam7jhrqk09/DC-6_3.jpg?dl=0"

"https://www.dropbox.com/s/jnktjty4cts52kf/DC-6_4.jpg?dl=0"

 

[CrashTronic 3]

Thanks for the photos, my initial hypothesis is your engine power is low based on your BMEP, but I need a bit more information. Could you take some more screenshots with the overlay displaying engine rpm and engine power instead of torque and prop rpm?

 

Thanks,

Mike

[alexcolka 183]

8 hours ago, CrashTronic said:

Thanks for the photos, my initial hypothesis is your engine power is low based on your BMEP, but I need a bit more information. Could you take some more screenshots with the overlay displaying engine rpm and engine power instead of torque and prop rpm?

 

Thanks,

Mike

Hi Mike,

Yes indeed my power may be low, remember I was flying with the AFE cruise power settings, I could add more power and cruise beyond 200 kias I know but I'm comparing when I was used to reach in XP10 with same conditions and AFE cruise power settings. Anyway I'm pasting the link for the image.

Hope this helps,

https://www.dropbox.com/s/wmmo28negrp03jg/DC-6_1.jpg?dl=0

[CrashTronic 3]

Yup you are cruising using only ~950hp per engine, about 250hp short of where you should be or 1000hp total. With the change from XP10 to 11 something changed the piston engine behavior and the AFE always undershoots the power in XP11, meaning you have to control it now and use the cruise tables in the back of the operating handbook. If you set book power values, the speeds will match.

Hope this helps,

Mike

 

[alexcolka 183]

Roger that Mike, that's what I will have to do from now on, forget about AFE cruise power settings in XP11 until a update is ready.

[CrashTronic 3]

Just now, alexcolka said:

Roger that Mike, that's what I will have to do from now on, forget about AFE cruise power settings in XP11 until a update is ready.

It's true for all phases, after takeoff, the power is always lower than where it should be. Enjoy and let me know if you run into any other issues. Hopefully an update occurs.