Rafal
New Member
Posts: 4 
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Post by Rafal on Dec 6, 2017 11:32:01 GMT
Hi.
I have just bought the plane in order to keep practicing my real P2006T skills.
My first impressions as a real pilot of P2006T are:
a) unrealistic drag for gear down configuration.
On real plane, when flying downwind leg and changing configuration for flaps Down and gear down, the moment you set the gears knob down, you have to increase manifold pressure up to 20 or 22 in order to keep the speed, otherwise your speed will start to decrease quite fast.
b) pitching down moment for gear down is to small. I used to apply much more trim up on real plane.
These are two most visible differences in plane handling I have noticed straight away.
Nevertheless, many thanks for the plane. It's something I was looking for, for my training purposes.
vbrgds
Raf.
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Post by VSL-Admin on Dec 6, 2017 11:48:55 GMT
Hi  Thanks! Flying the plane at the moment, so I took it to a test... Well, stabilizing at downwind, flaps half, lift to drag ratio stabilized at approximately 8.5 at ~75 knots. Gear retraction reduces it to ~6.9, which is acceptable. However, speed bleeding is not as much as forcing you to increase MAP to 20/22... I'll note down this input. I have a feeling that it is also a 1st stage flaps drag tuning... Anyways, great input. X-Plane 11 is evolving fast, and small issues such as this one can pop-out (even in X-Plane 11.05)... In the next update, it will be addressed! Thanks JetManHuss. |
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Rafal
New Member
Posts: 4
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Post by Rafal on Dec 6, 2017 12:00:48 GMT
Thanks for fast answer. another issue is the Max speed for Flaps T/o. Should be 119, but from what i have just flown on x plane, it's actually 91kt. Pls note screen print attached . Made at V=100, flaps T/O. Regarding pitching down and trimming issues. To be honest, I have never look ed on the trim scale while changing plane configuration from clean to flaps T/O - I will ask my instructor if you wish, and will be back with answer. My impression is that on real plane I have to press trim down switch much longer than on x-plane, so it might be the speed trim travels. I have to double check it  |
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Post by VSL-Admin on Dec 6, 2017 12:14:57 GMT
Hi The airspeed limit that you are seeing in Plane Maker is only for airspeed marking indication only (do not applied on 3D model instrument gauges). I'll check it with the G1000 indications however! You can move the mouse cursor onto that place and leave it for couple of seconds. You will see the note of X-Plane, which direct the designer to enter ZERO value if no markings are needed. So...practically this is meaningless What should I note in the screenshot? |
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Rafal
New Member
Posts: 4
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Post by Rafal on Dec 6, 2017 13:09:06 GMT
Hi.
I wasn't looking on the Plane Maker.
V max fr T/O flaps = 119kt comes from plane documentation. I have also double check it on Your web site:
VFE Maximum flaps extended speed:
Full - 93 knots Do not exceed this speed for indicated flaps setting.
T.O. - 119 knots Do not exceed this speed for indicated flaps setting.
What is happening is that when I am flying with V=100, and set flaps T/O, big rolling moment appear - on the screan print you can see lifting moment difference - the result of flaps over speed.
After resetting the plane, I have started acceleration from the speed of 80kt and flaps T/O configuration. The moment when the rolling effect appear is after passing 91kt.
vbrgds
RB
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Post by VSL-Admin on Dec 6, 2017 13:13:41 GMT
ok.. The V max for t/o flaps is 119 knots. This is obvious. The behavior that you are describing requires deeper look. I'll have a look now...will reply here soon. |
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Post by VSL-Admin on Dec 6, 2017 13:48:36 GMT
Hi again!
Yep! it is certainly wrong setting!
The aircraft is undergoing update development nowadays, but since this issue may affect the actual operation of the aircraft (for those who are flying with the "remove flying surfaces when over speed" feature on), I will issue a fix-update next week.
Thanks!
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Rafal
New Member
Posts: 4
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Post by Rafal on Dec 7, 2017 1:32:19 GMT
Hi Regarding Vfe-1 speed limit. I have played a bit with plane maker, and.... changing the Vfe-1 value from 93 up to 119 on Viewpoint panel have fixed the issue. The fact is, that plane maker manual said, that this only change the values for airspeed indicator markings only... but actually it worked also with aerodynamics . Regarding gear down pitching moment... I have increased "additional gear flat plate area" parameter from 1 up to 3, and for me it's similar to what I experience on real plane. My next expression is regarding flaps travel speed... which is a bit to fast from what I can tell. I have used 7 sec instead of 5 in "flap extend and retract time", and it looked more realistic. My next finging is the total drag.. which I believe is a little bit to small. Plane with MAX TOW, MAP22 and RPM 2050 (cruise set up) is flying with speed around 130-135 kt. My speeds on real Tecnam, with the same set up are around 110..115kt kt max. In order to fly faster I used to use much more power. and last but not least  . When flying with one engine inoperative... the running engine reach max 20MAN and 2140RPM... which is strange. With full forward (throttle & prop), I should be able to reach engine & prop limits. It does not change when I restart inoperative engine. The engine which was restarted is working normally while the one that was working all the time is still on max 20 MAN... there is something wrong wit it... vbrgds Rafal. |
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Post by VSL-Admin on Dec 7, 2017 5:49:23 GMT
Hi! Yes, these "tiny" changes are of course doable with planemaker. However, almost everything is affecting anything, and a "fast cure" to one aspect may end in wrong performance in other, or in other flight envelope regime. Performance tuning is a complex "all round" process, in which every factor is being tested not only in the current needed state, but also in others. But as you saw, changing variables in planemaker is the only method to change the dynamics Regarding the engine - on the engine setup screen, left side, you will see a value for max throttle for the engines and for single engine working. You can play with this value and tune it. Of course, an "official" fix will be released next week, as I've said. |
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. When flying with one engine inoperative... the running engine reach max 20MAN and 2140RPM... which is strange. With full forward (throttle & prop), I should be able to reach engine & prop limits. It does not change when I restart inoperative engine.