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Richard Sennett

Aero Commander Top Speed ?

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Guys only getting this bird to fly around 133mph - it should be faster than that - any ideas what i am doing wrong - props and mixture are correct - strange - thanks

 

Maximum speed: 215 mph (187 knots, 346 km/h) at sea level (TAS)
Cruise speed: 203 mph (176 knots, 326 km/h) at 9,000 ft (2,750 m), 75% power, TAS
Stall speed: 68 mph (59 knots, 109 km/h) flaps and landing gear down, CAS
Minimum controllable speed: 75 mph (65.5 knots, 121 km/h)
Range: 1,078 miles (936 nmi, 1,735 km)
Service ceiling: 19,400 ft (5,913 m)
Rate of climb: 1,340 ft/min (6.8 m/s)

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I was able to get 176kts at 9,000 ft with it being leaned 50% and throttle's at about 98% but below redline and very little wind. She does seems a little light on power? 

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Hi Folks,

 

Have to ask - sorry - you guys talking IAS or TAS ?

 

Regards,

Scott

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Hi Folks,

 

Have to ask - sorry - you guys talking IAS or TAS ?

 

Regards,

Scott

 

Not sure  - just turned on shift+z and stated 133 mph and so did gauge in vc

 

Any way to change a setting in aircraft.cfg file to get this to go faster ? its way to slow at the moment 

 

I was thinking throttle sensitivity setting and such but doubt thats it as other aircraft are working correctly - thanks

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Hi Rich,

 

What I was getting at - is that as altitude increases - IAS (Indicated Air Speed) decreases... I believe the sim uses IAS as default - as that's what we have to work with in the real world... TAS (True Air Speed) is IAS corrected for temperature/pressure... So the 133 mph his meaningless without knowing altitude and temperature...

 

Given Martin's example - on a standard day - the 176 kts IAS at 9000 feet - is really 199 kts TAS - which I would expect is probably pretty close for book values on this plane... Anyone know the spec or did Carenado include a cruise table ?

 

Regards,

Scott

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My reading was from the GTN 750 and pretty much a calm day, so I believe that was over the ground? But it was also at 98% power which I think I should be getting those numbers at 75% power....

 

Cheers

Martin

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Hi Rich,

 

What I was getting at - is that as altitude increases - IAS (Indicated Air Speed) decreases... I believe the sim uses IAS as default - as that's what we have to work with in the real world... TAS (True Air Speed) is IAS corrected for temperature/pressure... So the 133 mph his meaningless without knowing altitude and temperature...

 

Given Martin's example - on a standard day - the 176 kts IAS at 9000 feet - is really 199 kts TAS - which I would expect is probably pretty close for book values on this plane... Anyone know the spec or did Carenado include a cruise table ?

 

Regards,

Scott

 

Scott 2,000 ft off the ground tooling along straight ahead shift+z speed was 133 - temp was 65 Celsius - so something is not right - never seen this before - not at home right now which doesnt help   :sad:

My reading was from the GTN 750 and pretty much a calm day, so I believe that was over the ground? But it was also at 98% power which I think I should be getting those numbers at 75% power....

 

Cheers

Martin

 

Thats my thought also so its not right - anything we can change in aircraft.cfg file to make it faster ? thanks 

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Hi Martin,

 

With 0 wind - then yep - your TAS should be your GS and Rich's example does state 75% power - so - concur...

 

Hi Rich,

 

Ok - yep - that certainly does sound like you have an issue... Can't think of anything off the top of my head... Sorry... I'd open tickets with Carenado - all the ones I've submitted lately have been acknowledged and responded to...

 

Regards,

Scott

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One odd thing I noticed is if you select "Taxi mode" the gear will not come up, that happened to me the first time and I couldn't get her up to speed, then I went too spot view and saw what the problem was. If you start it any other way then no problem with the gear?

 

Martin

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Hi Martin,

 

With 0 wind - then yep - your TAS should be your GS and Rich's example does state 75% power - so - concur...

 

Hi Rich,

 

Ok - yep - that certainly does sound like you have an issue... Can't think of anything off the top of my head... Sorry... I'd open tickets with Carenado - all the ones I've submitted lately have been acknowledged and responded to...

 

Regards,

Scott

 

Hi Scott: thanks - could be my controls settings in P3D maybe - they work with all the other stuff I use - we'll get it   :wink: I think I will send carenado a e-mail but in the past that was pretty much a waste of time

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Martin,

 

If you start with Taxi mode, make sure you unlock the landing gear before you attempt to retract.  Not mentioned, but there is a switch just to the right of the landing gear lever.

 

--WH

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Something between 200 mph and 215 mph should be achievable - TAS.  Most performance speed numbers are at 8,000 feet 59 deg F.  Normal cruise is 203 mph at 75% power (28 gph).

 

Regards,

Ray

Std Shrike data.JPG

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Thanks Guys not getting any where near that Ray - strange - have to check p3d control settings I guess cant think of anything else - have mixture all the way up if I pull down on it it gets even slower ? hmmm

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Rob see anything out of the ordinary - I dont - tops out at 154mph - leveled off in ap mode - should be faster than this right ? also I re-downloaded it from carenado few mins ago and re-installed it - get about 10 more mph since doing that but still not right I think

2dmcrj6.jpg

Ray see anything out of the ordinary - I dont - tops out at 154mph - leveled off in ap mode - should be faster than this right ? also i re-downloaded it from carenado few mins ago and re-installed it - get about 10 more mph since doing that but still not right I think

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I would try leaning it to about 55%- 60%...good luck!

 

Martin

 

Thanks Martin thought I did that but can try again - as I pulled back on mixture I believe it got slower and definitely when I pulled back on prop pitch

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The only way I can get any speed out of her is to have the throttle almost full 98% and the prop pitch almost all the way forward and the mixture controls at 9,000ft at 55%, as mentioned that gave me 203 mph. Pretty close to the specs, however you shouldn't have to have prop pitch almost full forward and power at 98% to get those numbers in real life....

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The only way I can get any speed out of her is to have the throttle almost full 98% and the prop pitch almost all the way forward and the mixture controls at 9,000ft at 55%, as mentioned that gave me 203 mph. Pretty close to the specs, however you shouldn't have to have prop pitch almost full forward and power at 98% to get those numbers in real life....

 

Hi Martin got 174 out of it but thats it tried everything - mixture at anything less than all the way up didnt help - need to change something in cfg file to give it more power so I dont have fart around 

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Rich... your screenie shows the ASI and text to show the speed as 154 KIAS... Knots.  Your 174 KIAS looks to be just under 200 mph.

 

HTH

 

Greg

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Rich... your screenie shows the ASI and text to show the speed as 154 KIAS... Knots.  Your 174 KIAS looks to be just under 200 mph.

 

HTH

 

Greg

 

So its ok I guess going to up thrust_scalar = 1.30 from thrust_scalar = 1.00 see if that helps - seems a bit slow to me even if it is correct at the moment report back - still speed gauge on vc is only reading 174mph - should be around 200mph i would think - thank you

Rich... your screenie shows the ASI and text to show the speed as 154 KIAS... Knots.  Your 174 KIAS looks to be just under 200 mph.

 

HTH

 

Greg

 

You are correct Greg its the inner numbers for mph changed from thrust_scalar = 1.00 to thrust_scalar = 1.25 and its perfect now - thanks guys - good stuff

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e-mail sent to Carenado regarding cruise speed. Doesn't really answer the question?

I notice the only way to match the performance tables that indicate cruise speed at 203mph at 75% power is to run her at 100% power, with pitch full forward. The aircraft seems to be a little under powered.

Carenado Support, May 15, 21:26:

Greetings,

The flight dynamics were created and tested by a real life pilot with a lot of knowledge and experience in this area based on the aircraft´s POH.

Regards,

Carenado.

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Hi MartinRex007,

 

I can confirm your findings - I managed 202 knots (not MPH) at 9K ft, throttles full open, RPM 2400, mixture leaned to 53%...  certainly not 75% power.  Wind wasn't a factor at the time :)

 

Mark

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