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Dynamics - Revision history
2024-03-29T05:48:16Z
Revision history for this page on the wiki
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Thealx: category update
2020-01-13T19:38:54Z
<p>category update</p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 19:38, 13 January 2020</td>
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Thealx
http://eechcentral.simhq.com/index.php?title=Dynamics&diff=1760&oldid=prev
Thealx: /* Settings */
2014-05-31T17:47:16Z
<p><span dir="auto"><span class="autocomment">Settings</span></span></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 17:47, 31 May 2014</td>
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Thealx
http://eechcentral.simhq.com/index.php?title=Dynamics&diff=1627&oldid=prev
Messyhead at 17:28, 9 March 2013
2013-03-09T17:28:35Z
<p></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 17:28, 9 March 2013</td>
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Messyhead
http://eechcentral.simhq.com/index.php?title=Dynamics&diff=79&oldid=prev
Kassie at 13:55, 1 December 2007
2007-12-01T13:55:29Z
<p></p>
<p><b>New page</b></p><div>[[Image:Dynamics.jpg|right|thumb|300px|The dynamics option menu.]]<br />
This article is about the dynamics option menu and what all the option do with the aircraft.<br />
<br />
== Hazard levels ==<br />
<br />
{| class="prettytable"<br />
|-<br />
! Hazard level !! Explanation<br />
|-<br />
| [[Image:Dot green.png|12px]] || friendly, maybe even helpful<br />
|-<br />
| [[Image:Dot yellow-bright.png|12px]] || minor issues<br />
|-<br />
| [[Image:Dot yellow-dark.png|12px]] || watch out / try to avoid<br />
|-<br />
| [[Image:Dot orange.png|12px]] || hazardous thing<br />
|-<br />
| [[Image:Dot red.png|12px]] || deadly<br />
|}<br />
<br />
== [[Image:Dot orange.png|12px]] Blade Stall ==<br />
{| class="prettytable" align="left" width="150px"<br />
|-<br />
| colspan="2" | [[Image:Blade sides.png|150px]]<br />
|- <br />
| <font color="#0096FF">retreating blade side</font><br />
| <font color="#FF0034">advancing blade side</font><br />
|} <br />
<br />
When moving at extreme high speed the retreating blades cannot generate anymore lift, because the airflow (wind) blowing by, is moving faster than the retreating blades! <font color="#BBBBBB">This is a simplified picture of it to be comprehensible, a more complex theory can be found [http://cybercom.net/~copters/aero/retreating.html here].</font><br />
<br />
To get into extreme high speed, the helicopter has to go downhill. When going fast enough the helicopter starts to shake and at a certain point the helicopter tends to flip upside down sideways.<br />
<br />
Getting out of a blade stall situation is not so easy, because lift is needed of the retreating blades side which already no longer generates lift anymore. Don't go too fast is the best advice.<br />
<br />
[[Image:Hokum.jpg|thumb|right|A co-axial helicopter]]<br />
<br />
A contra-rotating co-axial helicopter has not to deal with retreating blade stall, because both main rotors cancels out each others retreating blade stall.<br />
<br />
* [http://en.wikipedia.org/wiki/Retreating_blade_stall retreating blade stall] - at Wikipedia<br />
* [http://cybercom.net/~copters/aero/retreating.html retreating blade stall] - at Helicopter Aviation<br />
<br />
== [[Image:Dot yellow-bright.png|12px]] Cross Couple ==<br />
<br />
This only effects a helicopter with a main and a tail rotor. Those rotors have to work together as a "crossed couple". Extra input to the main rotor will generate more torque (spin) movement to the helicopter. This has to be canceled out by the tail rotor. When <code>cross couple</code> is turned on it will aid the user to handle this problem.<br />
<br />
== [[Image:Dot green.png|12px]] Ground Effect ==<br />
<br />
{| class="prettytable" align="right"<br />
|-<br />
| [[Image:Ground-effect air.png|110px]]<br />
| [[Image:Ground-effect ground.png|110px]]<br />
|-<br />
| no ground effect<br />
| ground effect<br />
|}<br />
<br />
When decreasing altitude the airflow generated by the main rotor is pushed more and more off of the ground, which will add extra lift for the helicopter. A slowly descending helicopter will never reach ground level because of this.<br />
<br />
* [http://cybercom.net/~copters/aero/ground_effect.html ground effect] - at Helicopter Aviation<br />
* [http://en.wikipedia.org/wiki/Ground_effect_in_aircraft#Ground_effect_and_Helicopters ground effect] - at Wikipedia<br />
<br />
== [[Image:Dot yellow-dark.png|12px]] Over-Torque ==<br />
<br />
It is possible to give the engine an extra power input (over 100%). When this option is applied, the extra power input will increase the exhaust temperature. An overheated exhaust will eventually result in a permanent engine failure.<br />
<br />
== [[Image:Dot red.png|12px]] Vortex Ring ==<br />
<br />
[[Image:Vortex ring.jpg|thumb|right|A vortex ring]]<br />
<br />
A vortex ring for helicopters is an airflow recirculating the main rotor. This is an extremely hazardous situation! The pilot will experience this as a loss of lift instantly!<br />
<br />
A vortex ring is created when going into fast descend. When entering a vortex ring situation the helicopter starts to shiver. Increasing the collective will not help. Fly out of the vortex ring by lateral movements to leave the vortex ring behind.<br />
<br />
[http://en.wikipedia.org/wiki/Vortex_ring#Vortex_ring_effect_in_helicopters Vortex ring] - at Wikipedia<br />
<br />
== [[Image:Dot yellow-bright.png|12px]] Wind ==<br />
<br />
Wind is added to the game's physics. Game effect are:<br />
* in a hover: the helicopter will drift away.<br />
* when moving: the helicopter will drift off course.<br />
<br />
== [[Image:Dot green.png|12px]] Translational Lift ==<br />
<br />
Translation lift is experienced as extra generated lift (with the same amount of collective input) when moving (translation) the aircraft out of a hover situation. In a hover the helicopter's airflow reuse and this counteract the lift efficiency. When start moving, the reused air flow is left behind which improves the lift efficiency.<br />
<br />
* [http://en.wikipedia.org/wiki/Translational_lift translational lift] - at Wikipedia<br />
* [http://cybercom.net/~copters/aero/translational.html translational lift] - at Helicopter Aviation<br />
<br />
== Settings ==<br />
<br />
Here's a list for the most realistic and for the easiest physics settings.<br />
<br />
{| class="prettytable" align="none"<br />
|-<br />
!<br />
! Realism<br />
! Easy<br />
|-<br />
| Blade Stall<br />
| <code>on</code><br />
| <code>off</code><br />
|-<br />
| Cross Couple<br />
| <code>off</code><br />
| <code>on</code><br />
|-<br />
| Ground Effect<br />
| <code>on</code><br />
| <code>on</code><br />
|-<br />
| Over-Torque<br />
| <code>on</code><br />
| <code>off</code><br />
|-<br />
| Vortex Ring<br />
| <code>on</code><br />
| <code>off</code><br />
|-<br />
| Wind<br />
| <code>on</code><br />
| <code>off</code><br />
|-<br />
| Translational Lift<br />
| <code>on</code><br />
| <code>on</code><br />
|}<br />
<br />
== External links ==<br />
* [http://cybercom.net/~copters/helo_aero.html#concepts Helicopter Aerodynamics] - at Helicopter Aviation<br />
* [http://en.wikipedia.org/wiki/Helicopter_pilotage Helicopter Pilotage] - at Wikipedia<br />
* [http://www.dynamicflight.com/aerodynamics/ Dynamic Aerodynamics] - at Dynamic Flight<br />
<br />
[[category:installation and setup]]</div>
Kassie