Nicholaiovitch
03-31-2009, 04:36 PM
In creating a static picture of Hurricane IIb’s awaiting a scramble call, I modified a skin to reflect “gun tape” over the wing mounted MGs as was used during the BOB to enable armourers to see whether a returning a/c needed re-arming.
This first picture shows the standard skin with barrels visible:-
http://i303.photobucket.com/albums/nn134/Nicholaiovitch/IL-2/Used_guns.jpg
The second picture shows a “modified” skin with gun tape applied:-
http://i303.photobucket.com/albums/nn134/Nicholaiovitch/IL-2/Not_fired.jpg
This poses some fundamental questions with possibly enormous implications to the IL2 “Universe”: for without doubt, there will be a small increase in performance by the “orifice closure” of the 8 x .303 openings in this case:-
- Simple mathematics (3.142x0.303x8) demonstrates that having the eight guns uncovered is like flying with a 7.6 inch plate held at right angles to the airflow and since drag increases as the “square” of speed, this will have an impact on maximum speed particularly in a dive after firing the first burst. This ignores the thickness of the covered barrel and any space around it. Therefore, IRL with gun tape applied and prior to the first burst, there will be a small but significant performance enhancement! In IL2 since the tape will remain intact, this is then a permanent advantage?
- It could also be stated that differences in the “drawing” of radiator cooling grills on higher quality skins will also produce changes in frontal area and thus performance.
Since the increase in performance is difficult to quantify in actual flight, I have resorted to the well attributed aerodynamic means of measurement known as “The Ygla Selggib” method. (Possibly of Russian origin).
This begs the question as to whether this report, its consequences and the future modifications of skins, with their authors, should appear “On the Other Side!”?
I have published this report “here (http://i303.photobucket.com/albums/nn134/Nicholaiovitch/IL-2/Ygla_Selggib_Report.jpg)” and those wishing to interpret the results may view it and draw their own conclusions.
Whatever your beliefs and whatever your preferences (4.08 / 4.09 / Mods),
thank you Oleg, Happy Easter to you all, happy flying and may Biggles go with you.
Nicholaiovitch http://forums.ubi.com/images/smilies/16x16_smiley-surprised.gif
This first picture shows the standard skin with barrels visible:-
http://i303.photobucket.com/albums/nn134/Nicholaiovitch/IL-2/Used_guns.jpg
The second picture shows a “modified” skin with gun tape applied:-
http://i303.photobucket.com/albums/nn134/Nicholaiovitch/IL-2/Not_fired.jpg
This poses some fundamental questions with possibly enormous implications to the IL2 “Universe”: for without doubt, there will be a small increase in performance by the “orifice closure” of the 8 x .303 openings in this case:-
- Simple mathematics (3.142x0.303x8) demonstrates that having the eight guns uncovered is like flying with a 7.6 inch plate held at right angles to the airflow and since drag increases as the “square” of speed, this will have an impact on maximum speed particularly in a dive after firing the first burst. This ignores the thickness of the covered barrel and any space around it. Therefore, IRL with gun tape applied and prior to the first burst, there will be a small but significant performance enhancement! In IL2 since the tape will remain intact, this is then a permanent advantage?
- It could also be stated that differences in the “drawing” of radiator cooling grills on higher quality skins will also produce changes in frontal area and thus performance.
Since the increase in performance is difficult to quantify in actual flight, I have resorted to the well attributed aerodynamic means of measurement known as “The Ygla Selggib” method. (Possibly of Russian origin).
This begs the question as to whether this report, its consequences and the future modifications of skins, with their authors, should appear “On the Other Side!”?
I have published this report “here (http://i303.photobucket.com/albums/nn134/Nicholaiovitch/IL-2/Ygla_Selggib_Report.jpg)” and those wishing to interpret the results may view it and draw their own conclusions.
Whatever your beliefs and whatever your preferences (4.08 / 4.09 / Mods),
thank you Oleg, Happy Easter to you all, happy flying and may Biggles go with you.
Nicholaiovitch http://forums.ubi.com/images/smilies/16x16_smiley-surprised.gif