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Sukhoi Superjet - Development

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Sukhoi Superjet - Development

Postby xsaint » Thu Sep 23, 2010 12:27 pm

****************RELEASED****************

A test release of this aircraft is now made available for CNA pilots here at http://www.cresdernixrof.com

Cheers


*********************************************************************************************************************************
>>>> older message <<<<


I am starting a new thread for this project......

Image


Will update as i progress along...

Cheers
Last edited by xsaint on Mon Sep 05, 2011 8:30 am, edited 1 time in total.
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Re: Sukhoi Superjet - Development

Postby JcHnd » Thu Sep 23, 2010 3:50 pm

Nice! I love it! :D
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Re: Sukhoi Superjet - Development

Postby xsaint » Thu Sep 23, 2010 4:19 pm

Cockpit Mockup....

Image

Image

Cheers
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Re: Sukhoi Superjet - Development

Postby JcHnd » Thu Sep 23, 2010 5:46 pm

Nice... but why dont you try to make real cabin windows instead of just painted ones?
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Re: Sukhoi Superjet - Development

Postby simbabeat » Fri Sep 24, 2010 1:08 am

It's a mockup in blender, don't worry they are transparent.

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Re: Sukhoi Superjet - Development

Postby xsaint » Fri Sep 24, 2010 1:09 am

simbabeat wrote:It's a mockup in blender, don't worry they are transparent.

Cheers



Spot on
:)
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Re: Sukhoi Superjet - Development

Postby Pilot Penguin » Fri Sep 24, 2010 11:45 pm

Hi xsaint!

That model's looking great!

I personally don't care if it takes a month or a year to develop, as long as the overall product is awesome :mrgreen:

Cheers!
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Re: Sukhoi Superjet - Development

Postby xsaint » Mon Sep 27, 2010 11:29 am

Progressing ....but at much slower rate

Image

Image

Image

.....................
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Re: Sukhoi Superjet - Development

Postby boeing 787-8 » Mon Sep 27, 2010 2:57 pm

Good aircraft, but, Why the crystals are yellow?
I Don´t know where we will take all of this, but I assure you it will be fun. (Orville Wright, 1903).

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Re: Sukhoi Superjet - Development

Postby xsaint » Thu Sep 30, 2010 11:28 am

The progress is kinda slow for this aircraft due to lack of technical data....

I am heaving headache trying to solve the CG problem on this aircraft. The axis of pitch movement seems to be at its tail end....
The command of yasim <FD<.xml> says the CG was at the end,,, so i readjusted ballast location and values.Even though the CG is now where i want it to be, during flight it still pitches from the tail end....

Anyone encountered this behaviour?

Tried the following with not much success for now
1)Changed ballast locations and values
2)Changed aircraft weight and locations


Cheers
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Re: Sukhoi Superjet - Development

Postby isix » Thu Sep 30, 2010 11:33 am

xsaint wrote:The progress is kinda slow for this aircraft due to lack of technical data....

I am heaving headache trying to solve the CG problem on this aircraft. The axis of pitch movement seems to be at its tail end....
The command of yasim <FD<.xml> says the CG was at the end,,, so i readjusted ballast location and values.Even though the CG is now where i want it to be, during flight it still pitches from the tail end....

Anyone encountered this behaviour?

Tried the following with not much success for now
1)Changed ballast locations and values
2)Changed aircraft weight and locations


Cheers


Use Blender-YASim plugin to check the model, maybe a signal is wrong... some thing like this. Other tips is to use more fuselage sections, to a "intelligent" weight distribution (it solve some problems to me). Can you post the fdm file or the yasim binary output? Regards
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Re: Sukhoi Superjet - Development

Postby xsaint » Thu Sep 30, 2010 11:53 am

The FDM for now...
Code: Select all
<!--SSJ yasim , FDM by Xsaint-->
<!--Creative Commons-->



<airplane mass="55040">

<!-- Approach configuration -->
<approach speed="135" aoa="7" fuel="0.8">
    <control-setting axis="/controls/engines/engine[0]/throttle-lever" value="0.35"/>
    <control-setting axis="/controls/engines/engine[1]/throttle-lever" value="0.35"/>
    <control-setting axis="/controls/flight/flaps" value="1"/>
    <control-setting axis="/surface-positions/slats" value="1"/>
    <control-setting axis="/controls/gear/gear-down" value="1"/>
    <solve-weight idx="0" weight="350"/>
    <solve-weight idx="1" weight="1304"/>
</approach>

<!-- Cruise configuration -->
<cruise speed="463" alt="36000" fuel="0.9">
    <control-setting axis="/controls/engines/engine[0]/throttle-lever" value="0.95"/>
    <control-setting axis="/controls/engines/engine[1]/throttle-lever" value="0.95"/>
    <control-setting axis="/controls/flight/flaps" value="0.0"/>
    <control-setting axis="/controls/flight/elevator-trim" value="0"/>
    <control-setting axis="/controls/gear/gear-down" value="0"/>
    <solve-weight idx="0" weight="350"/>
    <solve-weight idx="1" weight="1304"/></cruise>



<cockpit x="23.25" y="0.42" z="0.72"/>

<fuselage ax="25.63" ay="0" az="-0.48" bx="23.34" by="0.00" bz="0.18"
    width="2.55" taper="0.0" midpoint="1"/>
 
   
<fuselage ax="23.84" ay="0" az="0.16" bx="22.84" by="0.00" bz="0.16"
    width="2.8" taper="0.8" midpoint="1"/> 
   
   
<fuselage ax="22.94" ay="0" az="0.16" bx="20.19" by="0.00" bz="0.16"
    width="3.23" taper="0.9" midpoint="1"/>   
   
   
<fuselage ax="20.28" ay="0" az="0.16" bx="4.71" by="0.00" bz="0.18"
    width="3.23" taper="1" midpoint="0.5"/>
   
   
<fuselage ax="4.91" ay="0" az="0.18" bx="-5.82" by="0.00" bz="0.88"
    width="3.23" taper="0.35" midpoint="0"/> 
   
   
<fuselage ax="16.11" ay="4.27" az="-1.78" bx="11.66" by="4.27" bz="-1.74"
    width="1.9" taper="0.6"/>
<fuselage ax="16.11" ay="-4.27" az="-1.78" bx="11.66" by="-4.27" bz="-1.74"
    width="1.9" taper="0.6"/>



 <wing x="12.55" y="1" z="-1.04" length="14.0" chord="6.3" sweep="25.0"
      taper="0.228" dihedral="1" camber="0.0051" incidence="1.5">
    <stall aoa="15" width="10" peak="1.5"/>
    <flap0 start="0" end=".770" lift="1.7" drag="1.6"/>
    <flap1 start=".76" end=".95" lift="1.4" drag="1.2"/>
    <slat start="0" end="1" aoa="2" drag="1.2"/>
    <spoiler start="0.2" end="0.73" lift="0.2" drag="4.0"/>
    <control-input axis="/controls/flight/flaps" control="FLAP0"/>
    <control-input axis="/surface-positions/flap-pos-norm" control="SLAT"
    src0="0.5" dst0="0" src1="1.0" dst1="1.0"/>
    <control-output control="FLAP0" prop="/surface-positions/flap-pos-norm"/>
    <control-output control="SLAT" prop="/surface-positions/slats"/>
    <control-speed control="FLAP0" transition-time="10"/>
    <control-input axis="/controls/flight/speedbrake" control="SPOILER"/>
    <control-output control="SPOILER" prop="/surface-positions/speedbrake-norm"/>
    <control-speed control="SPOILER" transition-time="5"/>
    <control-input axis="/controls/flight/aileron" control="FLAP1" split="true"/>
    <control-input axis="/controls/flight/aileron-trim" control="FLAP1" split="true"/>
    <control-output control="FLAP1" side="left" prop="/surface-positions/left-aileron-pos-norm"/>
    <control-output control="FLAP1" side="right" prop="/surface-positions/right-aileron-pos-norm"/>
</wing>



<hstab x="-2.29" y="0.58" z="0.95" chord="3.24" length="5.29" taper="0.41"
       sweep="30" dihedral="3" effectiveness="2.5" camber="-0.01">
  <stall aoa="20" width="10" peak="1.5"/>
  <flap0 start="0" end="1" lift="1.6" drag="1.2"/>
  <control-input axis="/controls/flight/elevator" control="FLAP0"/>
  <control-input axis="/controls/flight/elevator-trim" control="FLAP0"/>
  <control-output control="FLAP0" prop="/surface-positions/elevator-pos-norm"/>
</hstab>




<vstab x="-0.25" y="0.00" z="1.52" chord="5.23" length="5.97" taper="0.340"
       sweep="36">
  <stall aoa="15" width="5" peak="1.5"/>
  <flap0 start="0" end="1" lift="1.45" drag="1.2"/>
  <control-input axis="/controls/flight/rudder" control="FLAP0" invert="true"/>
  <control-input axis="/controls/flight/rudder-trim" control="FLAP0" invert="true"/>
  <control-output control="FLAP0" prop="/surface-positions/rudder-pos-norm"
          min="1" max="-1"/>
</vstab>





<jet x="15.20" y="4.26"  z="-1.72" mass="3770" thrust="18270" spool-time="3"
egt="890" tsfc="0.374 " n1-idle="45" n1-max="105" n2-idle="70" n2-max="108">
  <control-input axis="/controls/engines/engine[0]/throttle-lever" control="THROTTLE" src0="0.2" dst0="0" src1="1" dst1="1"/>
  <control-input axis="/controls/engines/engine[0]/mixture" control="MIXTURE"/>
  <control-input axis="/controls/engines/engine[0]/reverser" control="REVERSE_THRUST"/>
    <control-output control="REVERSE_THRUST" prop="/surface-positions/reverser-norm[0]"/>
    <control-speed control="REVERSE_THRUST" transition-time="2"/>
<actionpt x="16.10" y="4.26" z="-1.75"/>
</jet>



<jet x="15.20" y="-4.26"  z="-1.72" mass="3770" thrust="18270"  spool-time="3"
egt="890" tsfc="0.374" n1-idle="45" n1-max="105" n2-idle="70" n2-max="108">
  <control-input axis="/controls/engines/engine[1]/throttle-lever" control="THROTTLE" src0="0.2" dst0="0" src1="1" dst1="1"/>
  <control-input axis="/controls/engines/engine[1]/mixture" control="MIXTURE"/>
  <control-input axis="/controls/engines/engine[1]/reverser" control="REVERSE_THRUST"/>
    <control-output control="REVERSE_THRUST" prop="/surface-positions/reverser-norm[0]"/>
    <control-speed control="REVERSE_THRUST" transition-time="2"/>
<actionpt x="16.10" y="-4.26" z="-1.75"/>
</jet>






<gear x="22.02"  y="0.00" z="-2.87"
      compression="0.8" spring="1.8" damp="1" sfric="1.7" dfric="1.0">
  <control-input axis="/controls/flight/rudder" control="STEER" square="true"/>
  <control-input axis="/controls/gear/gear-down" control="EXTEND"/>
  <control-output control="EXTEND" prop="/gear/gear[0]/position-norm"/>
  <control-speed control="EXTEND" transition-time="7"/>
</gear>

<gear x="10.80" y="2.67" z="-2.94" compression="0.5" spring="0.8" sfric="1.3" dfric="0.9">
  <control-input axis="/controls/gear/brake-left" control="BRAKE"/>
  <control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
  <control-input axis="/controls/gear/gear-down" control="EXTEND"/>
  <control-output control="EXTEND" prop="/gear/gear[1]/position-norm"/>
  <control-speed control="EXTEND" transition-time="8"/>
</gear>


<gear x="10.80" y="-2.67" z="-2.94" compression="0.5" spring="0.8" sfric="1.3" dfric="0.9">
  <control-input axis="/controls/gear/brake-right" control="BRAKE"/>
  <control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
  <control-input axis="/controls/gear/gear-down" control="EXTEND"/>
  <control-output control="EXTEND" prop="/gear/gear[2]/position-norm"/>
  <control-speed control="EXTEND" transition-time="8"/>
</gear>



<tank x="13.55" y="6.26" z="-1.04" jet="true" capacity="8500"/>
<tank x="13.55" y="0" z="0.19" jet="true" capacity="8500"/>
<tank x="13.55" y="-6.26" z="-1.04" jet="true" capacity="8500"/>



<weight x="22.97" y="0" z="-0.06" mass-prop="/sim/weight[0]/weight-lb"/>
<weight x="13.97" y="0" z="0.17" mass-prop="/sim/weight[1]/weight-lb"/>
<weight x="18.76" y="0" z="-0.75" mass-prop="/sim/weight[2]/weight-lb"/>
<weight x="5.69" y="0" z="-0.78" mass-prop="/sim/weight[3]/weight-lb"/>


<!--

-->
<ballast x="20.34"  y="0.00" z="-3.83" mass="5000"/>
<ballast x="18.14"  y="0.00" z="-0.16" mass="3000"/>
<ballast x="22.04" y="0" z="-1.12" mass="2500"/>
<ballast x="10.80" y="-2.67" z="-2.94" mass="1500"/>
<ballast x="10.80" y="2.67" z="-2.94" mass="1500"/>
<ballast x="-5.49" y="0" z="-0.87" mass="-2500"/>







<thruster x="19.36"  y="0.00" z="-5.55" vx="1" vy="0" vz="0" thrust="20000">
  <control-input axis="/sim/model/pushback/target-speed-fps" control="THROTTLE"
  src0="-1" src1="1" dst0="-1" dst1="1"/>
  </thruster>

</airplane>



The yasim Output
Code: Select all
Solution results:       Iterations: 2103
 Drag Coefficient: 15.484214
       Lift Ratio: 75.776749
       Cruise AoA: 3.632988
   Tail Incidence: -5.732409
Approach Elevator: -0.636144
               CG: x:12.912, y:-0.000, z:-0.746

  Inertia tensor : 727175.875, -0.003, 186760.969
        [kg*m^2]   -0.003, 970109.188, 0.000
     Origo at CG   186760.969, 0.000, 1550602.625



And the Fuselage.....Sorry i am extreamly bad with blender...so with my limited understanding here is the shot...
Image
Image
Image


Thank you
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Re: Sukhoi Superjet - Development

Postby xsaint » Fri Oct 01, 2010 1:37 am

Not to confuse the matter...i shall simply point to http://www.city-gallery.com/knoblock/pr ... oords.html

So taking the above into consideration...is this a possible bug?
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Re: Sukhoi Superjet - Development

Postby xsaint » Fri Oct 01, 2010 10:07 am

CG Problem solved....

Just for the info...
As long as the CG points to the center on your YASIM Output, it means your FDM could be correct....BUT in this case when you are on external view, you may feel as if the CG is off center mark you expected. This is not because the FDM is wrong, but the way FG renders it's views (with reference to above mentioned link).This wrong rendering may make us believe otherwise and we may think the FDM is wrong....

The solution? Offset the model in the model.xml on the X direction. The amount to offset depends on your views.Now take off and view from external and you may find that the CG is near where you actually wanted....if not just re-adjust the offset values....

Hope it helps anyone with similar problem


cheers!
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Re: Sukhoi Superjet - Development

Postby isix » Fri Oct 01, 2010 11:26 pm

Well done! Then the FDM are ok now? Good tip, xsaint! Thank you
Last edited by Gijs on Sun Oct 03, 2010 11:47 am, edited 1 time in total.
Reason: No useless quoting please.
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