Jump to content

[FIXED BY DEKA] [OB 2.7.16.28157] SD-10 nozzle_exit_area value incorrect


DSplayer

Recommended Posts

Problem:
Currently the SD-10 has a nozzle_exit_area value of 0.025 which translates to 7.024 inch (17.84 cm) diameter nozzle. When compared to its other contemporaries like the AIM-120C-5, the AIM-120C-5 has a nozzle_exit_value of 0.0132 which translates to a 5.104 inch (12.964 cm) diameter nozzle. The R-33 has a nozzle_exit_value of 0.025 as well.

Examples:
When comparing the nozzles of the AIM-120C-5 and the SD-10 with the model viewer, you can see that the SD-10 actually has a nozzle that is a little bit smaller than the AIM-120C-5's:

Spoiler

unknown.png

 

AIM-120C-5, SD-10, and R-33's nozzles:

Spoiler

unknown.png

 

Performance Data:

I decided to conduct a test of the SD-10 with a nozzle_exit_area of 0.012668 (5 inch/12.7 cm diameter nozzle) and a performance drop can be seen if the SD-10 uses this smaller nozzle_exit_area. The same track was used for both tests.


Google Sheets Link to Charts

 

Spoiler

SD-10_Nozzle_Size_Differences_500m.png

 

SD-10_Nozzle_Size_Differences_6km.png

 

SD-10_Nozzle_Size_Differences_12km.png

 

Conclusion: The current SD-10's nozzle_exit_area values are too great and cause an abundance of performance at higher altitudes (a maximum difference of Mach ~0.248 at 12km altitude).


Edited by DSplayer
  • Like 2

-Tinkerer, Certified F-14 and AIM-54 Nut | Discord: @dsplayer

Setup: i7-8700k, GTX 1080 Ti, 32GB 3066Mhz, Lots of Storage, Saitek/Logitech X56 HOTAS, TrackIR + TrackClipPro
Modules: F-14, F/A-18, JF-17, F-16C, Mirage 2000C, FC3, F-5E, Mi-24P, AJS-37, AV-8B, A-10C II, AH-64D, MiG-21bis, F-86F, MiG-19P, P-51D, Mirage F1, L-39, C-101, SA342M, Ka-50 III, Supercarrier, F-15E
Maps: Caucasus, Marianas, South Atlantic, Persian Gulf, Syria, Nevada

Mods I've Made: F-14 Factory Clean Cockpit Mod | Modern F-14 Weapons Mod | Iranian F-14 Weapons Pack | F-14B Nozzle Percentage Mod + Label Fix | AIM-23 Hawk Mod for F-14 

Link to comment
Share on other sites

4 minutes ago, Napillo said:

Tired of getting your F-14 shot down by SD-10? 😄

Nah disappointed that the SD-10 doesn't have a 10 inch diameter nozzle 😄

-Tinkerer, Certified F-14 and AIM-54 Nut | Discord: @dsplayer

Setup: i7-8700k, GTX 1080 Ti, 32GB 3066Mhz, Lots of Storage, Saitek/Logitech X56 HOTAS, TrackIR + TrackClipPro
Modules: F-14, F/A-18, JF-17, F-16C, Mirage 2000C, FC3, F-5E, Mi-24P, AJS-37, AV-8B, A-10C II, AH-64D, MiG-21bis, F-86F, MiG-19P, P-51D, Mirage F1, L-39, C-101, SA342M, Ka-50 III, Supercarrier, F-15E
Maps: Caucasus, Marianas, South Atlantic, Persian Gulf, Syria, Nevada

Mods I've Made: F-14 Factory Clean Cockpit Mod | Modern F-14 Weapons Mod | Iranian F-14 Weapons Pack | F-14B Nozzle Percentage Mod + Label Fix | AIM-23 Hawk Mod for F-14 

Link to comment
Share on other sites

On 8/16/2022 at 12:38 AM, DSplayer said:

Problem:
Currently the SD-10 has a nozzle_exit_area value of 0.025 which translates to 7.024 inch (17.84 cm) diameter nozzle. When compared to its other contemporaries like the AIM-120C-5, the AIM-120C-5 has a nozzle_exit_value of 0.0132 which translates to a 5.104 inch (12.964 cm) diameter nozzle. The R-33 has a nozzle_exit_value of 0.025 as well.

Examples:
When comparing the nozzles of the AIM-120C-5 and the SD-10 with the model viewer, you can see that the SD-10 actually has a nozzle that is a little bit smaller than the AIM-120C-5's:

  Hide contents

unknown.png

 

AIM-120C-5, SD-10, and R-33's nozzles:

  Hide contents

unknown.png

 

Performance Data:

I decided to conduct a test of the SD-10 with a nozzle_exit_area of 0.012668 (5 inch/12.7 cm diameter nozzle) and a performance drop can be seen if the SD-10 uses this smaller nozzle_exit_area. The same track was used for both tests.


Google Sheets Link to Charts

 

  Hide contents

SD-10_Nozzle_Size_Differences_500m.png

 

SD-10_Nozzle_Size_Differences_6km.png

 

SD-10_Nozzle_Size_Differences_12km.png

 

Conclusion: The current SD-10's nozzle_exit_area values are too great and cause an abundance of performance at higher altitudes (a maximum difference of Mach ~0.248 at 12km altitude).

Hey I looked up the LD-10, the ARM version of SD-10. It is same missile ballistically and should have same nozzle diameter. Recently there has been discussion in Deka forums that LD-10 under performs compared to SD-10 by 10-15%, and no one knows why.

 

I just looked at nozzle diameter for LD-10, it says 0.01368. Oddly enough this is still slightly higher then AIM-120, but is probably a lot closer to what it should be. I wonder if some sort of other parameter would need to be adjusted for this large nozzle diameter. 
 

Anyways, I suggest you post this in Deka forums, where they will see it and change it. Since I’m pretty sure only ED looks at this forum 

Black Shark Den Squadron Member: We are open to new recruits, click here to check us out or apply to join! https://blacksharkden.com

E3FFFC01-584A-411C-8AFB-B02A23157EB6.jpeg

Link to comment
Share on other sites

Just now, AeriaGloria said:

Hey I looked up the LD-10, the ARM version of SD-10. It is same missile ballistically and should have same nozzle diameter. Recently there has been discussion in Deka forums that LD-10 under performs compared to SD-10 by 10-15%, and no one knows why.

 

I just looked at nozzle diameter for LD-10, it says 0.01368. Oddly enough this is still slightly higher then AIM-120, but is probably a lot closer to what it should be. I wonder if some sort of other parameter would need to be adjusted for this large nozzle diameter. 
 

Anyways, I suggest you post this in Deka forums, where they will see it and change it. Since I’m pretty sure only ED looks at this forum 

Yeah I detailed it in post on the Deka forums:
 

 

They're checking it so it so there should be a fix soon.

-Tinkerer, Certified F-14 and AIM-54 Nut | Discord: @dsplayer

Setup: i7-8700k, GTX 1080 Ti, 32GB 3066Mhz, Lots of Storage, Saitek/Logitech X56 HOTAS, TrackIR + TrackClipPro
Modules: F-14, F/A-18, JF-17, F-16C, Mirage 2000C, FC3, F-5E, Mi-24P, AJS-37, AV-8B, A-10C II, AH-64D, MiG-21bis, F-86F, MiG-19P, P-51D, Mirage F1, L-39, C-101, SA342M, Ka-50 III, Supercarrier, F-15E
Maps: Caucasus, Marianas, South Atlantic, Persian Gulf, Syria, Nevada

Mods I've Made: F-14 Factory Clean Cockpit Mod | Modern F-14 Weapons Mod | Iranian F-14 Weapons Pack | F-14B Nozzle Percentage Mod + Label Fix | AIM-23 Hawk Mod for F-14 

Link to comment
Share on other sites

  • DSplayer changed the title to [FIXED BY DEKA] [OB 2.7.16.28157] SD-10 nozzle_exit_area value incorrect
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...