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Bf 109 K-4 instability and stability


Yo-Yo

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Ок. 109 was tested in two conditions: 100% fuel with full rear tank and 25% with rear tank empty.

Climb test

Screen_200410_004726.thumb.png.e4aa1eff1e958ecf7294caacd7ca337e.png

Screen_200410_004752.thumb.png.70760471c1d00f28a9d96eadbee6f089.png

Screen_200410_004828.thumb.png.8fc0558d09a9a0a3525181bf69548386.png


Edited by Yo-Yo

Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів

There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles.

Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me

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Gliding test

Screen_200410_004907.thumb.png.1848312dd86c94aa40593169595d1fed.png

Screen_200410_004948.thumb.png.0a84388f61257323e1fdac4dae532be6.png

Screen_200410_005033.thumb.png.f8502a47462cd019f4aec3a57896815d.png

Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів

There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles.

Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me

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Gliding with flaps down.

Screen_200410_005139.thumb.png.9c08b730b88411eb3e9318db12e359bc.png

Screen_200410_005226.thumb.png.5ce8d346b8c0c89e7d586c81f3050130.png

Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів

There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles.

Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me

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  • ED Team

25% fuel, rear tank empty, climb

Screen_200410_005542.thumb.png.61e2fd0818a607b86e55d27c7968c947.png

Screen_200410_005630.thumb.png.107c5f4b055941d57111766719d7f0c0.png

Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів

There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles.

Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me

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  • ED Team

25% fuel, rear tank empty, gliding

Screen_200410_005653.thumb.png.ca19e2f76ba662434fc4762bdea72fca.png

Screen_200410_005748.thumb.png.27b4172c2196105bb2d24a52ee5f942b.png

Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів

There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles.

Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me

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  • ED Team

25% fuel, rear tank empty, gliding, flaps down

Screen_200410_005841.thumb.png.1d230c6e4edf69bd2c8105c3f4ba7dca.png

Screen_200410_005916.thumb.png.2ce14dc97a8605321d84f9be0fe5b8da.png

Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів

There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles.

Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me

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Hello Yo-Yo, allow me a question, how come the propeller disk no longer appears in the 109K as you can clearly see also in the screens you posted?

 

This situation has been around for some time now and this airplane is the only WWII airplane in DCS to present this really annoying problem, are you aware of it?

 

Thank you very much for the attention :)

 

 

 

:thumbup:

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  • 9 months later...

Hello,

Is there a suitable engine configuration for climbing and that the plane is not so unstable?
At low speeds on the ascent, I notice that you have to make a lot of stick movements to make it more or less stable.

and another rookie question, do the rudders influence the stability or just so that the plane does not slide?

 

thks


Edited by lt_d4n
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2 hours ago, lt_d4n said:

Hello,

Is there a suitable engine configuration for climbing and that the plane is not so unstable?
At low speeds on the ascent, I notice that you have to make a lot of stick movements to make it more or less stable.

and another rookie question, do the rudders influence the stability or just so that the plane does not slide?

 

thks

 

Rudder influence planes stability. Side slip is reducing lift generated by wings. So plane need higher AOA to maintain level flight, Higher AOA = higher induced drag.

All sort of bad things happening in side slip.

Reducing cooling capability of cooling system. 

Induce higher stress on air frame.

Increasing stall speed especially accelerated stalls are more likely to happen in side slip.


Edited by grafspee
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System specs: I7 14700KF, Gigabyte Z690 Aorus Elite, 64GB DDR4 3600MHz, Gigabyte RTX 4090,Win 11, 48" OLED LG TV + 42" LG LED monitor

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