I'm starting a thread in mods section, in case anyone would like to fix misused pictures in his mod, or add new pictures - so don't shoot
What urged me was too much Bell 47 incarnations throughout different helicopters in the game... Occassionally I will point out also icon, size and carry capacity standarization throughout the same units.
I'm starting with
light helicopters:
4 Israel
256, 272 Alouette II - icon is Alouette III, proper one is 992 (green)
277, 278 Defender 500MD; 279, 344, 346 Lahatut 500MD; 345 Scout 500MD - I'm attaching a picture of armed Israeli MD 500 with markings, instead of generic unarmed photo.
5 Japan
#337 KH-4 (a derivate of Bell 47 with closed cab) - has a picture of Westland Scout - could be Bell 47, eg. 34901, or I'm attaching a new one (it could carry 1+3 men according to Wikipedia)
#338 S-51 - icon should be wheeled, longer and narrower - 1908 of Mi-1 is almost perfect (for all S-51s below as well).
#339 Hibari - size should be 1, like OH-13
#340 OH-13 has carry=0 - it could be 1+2
6 France
#501 Sud-Ouest Djinn has a picture of OH-23 Raven. I'm attaching a proper one (in fact this tiny helicopter could carry 1+1 only, by no means 103)
#504 Alouette I - it was prototype only - https://en.wikipedia.org/wiki/SNCASE_SE.3120_Alouette, and looked like that: http://www.aviastar.org/helicopters_eng/snias_alu.php However, production model Alouette II was adopted by the French Army since around 1956-57 (now armed unit 505 from 1960), so I suggest to change #504 to unarmed Alouette II from 1956.
12 USA
282 OH-13 Sioux - it could carry 1+2 men (1+1 in earliest versions - now: 0)
OH-13/Bell 47 has size 1 in USA and UMCS oobs, but 2 in most others, including US #277 OH-13+ Sioux. Size 1 may be justified by its frame design
13 USMC
874 HOK-1 Huskie - has a picture of very different smaller Sikorsky R-6 (also used as HOS-1 since about 1947). I'm attaching a proper one.
BTW - it may be worth to add Sikorsky HO3S (S-51) here, eg. copied from Canadian OOB (carry capacity was 1+2).
17 Iraq
105 WS-51 (Westland-Sikorsky 51) has a picture of Bell 47 - proper is 56002. It could carry max 1+3 (or 1+2?). Icon should be wheeled - best is 1908.
107 BK-117 has a picture of Bo-105 (I'm attaching a proper one)
18 India
110, 122 Chetak - I'm attaching a picture for Indian Chetak (replacing unused 23812)
111 Cheetah (licence-built SA-315 Lama - Alouette II variant) - photo is Alouette III and icon is too big (proper is 992 of Alouette II). Photo could be 6525 (used as Lama by Argentina). Size should be 2, as French Alouettes (it was no bigger).
128 HAL Lancer - armed variant of SA-315 Lama - photo is Alouette III and icon is too big as above (armed Alouette II has icon 993). I'm attaching a picture for Lancer (size should be 2, as above)
131-135 HAL LCH - picture is Rooivalk. I'm attaching photos (proposed pm34937, instead of unused A129).
20 South Korea
98 Kawasaki KH-4 - same as Japan (it has a picture of Westland Scout, could be 34901, or I'm attaching a new one). Carry should be max 3.
97 Bell 47G - better icon for unarmed Bell is 750 (size 1)
27 Belgium:
203 Alouette II - icon is Alouette III, correct is 992
205 Alouette II/AT, 210 Alouette II/AT - generic picture could be replaced with Alouette II with missiles (attached)
30 Canada:
402 Sikorsky S51 - icon should have wheels (best is 1908). It could carry 2 men.
403 Hiller UH-12 - size should be 1 like in US oob
41 Yugoslavia
118 Bell 47G - size-1, carry=2
126 Alouette III - dedicated icon for armed version is 1919
44 Germany
331 Alouette II - icon is bigger Alouette III, correct is 992
334 Alouette II/AT - generic picture could be replaced with Alouette II with missiles (attached); icon is Alouette III/AT, dedicated one is 994
335 Alouette II - icon is Alouette III, dedicated one with rockets is 993
338 Agusta Scout - picture is Alouette, should be Bell 47, eg. 6114, 9006. According to German book, they were named just Bell 47G-2 (a dedicated icon is 750). US has size 1.
45 Argentina:
520 Bell Sioux 47 - crew=1, size=1 (carry=2 - correct)
521 Sikorsky S51 - icon should have wheels
47 Cyprus
143 Bell 47J picture should be 34902 (now it is smaller Bell 47G-H).
49 Cuba
#120 Bell 47G/J - it has a picture of Westland Scout, could be eg. 34901. Carry should be max 3 in 47J or 2 in 47G.
50 Algeria
220 Hughes 55 has a photo of Bell 47 - could be 36857. Carry=4 is way too much for 1+1-seater Hughes OH-55
52 South Africa
157 Wasp - photo is Alouette, should be 28900 or 28901
163 Sikorsky S51 - icon should have wheels (1908). Max carry=2 or 3
61 Nigeria
121 Widgeon - photo is very different Alouette. A related Dragonfly 56002 is better.
53 Switzerland
618 Sud-Ouest Djinn has a picture of Bell 47. It could carry only 1+1. Attached is a picture of Djinn.
138 Alouette II; 982 Alouette II AT; 983 Alouette II AT; 984 Alouette II AT; 988 Alouette II all have a photo 6114 of Bell 47 - could be eg. 117. However, as for missile-armed 982, 983, 984 I'm attaching armed Alouette II picture
54 Thailand
489 Kawasaki KH-4 - same as Japan (it has a picture of Westland Scout, could be 34901, or I'm attaching a new one)
485 TH 300 - it has a picture of Westland Scout. For Schweizer 300 could be 36857.
487 WS-51 (Westland-Sikorsky 51) has a picture of Bell 47- could be 56002 (icon should be wheeled - 1908 is best). It could carry 1+3 (1+2?) men
488 OH-13 Sioux - size=1, carry could be 2
59 Chile
118 SA-315 Lama has a photo of Bell 47 - could be 6525 (used as Lama by Argentina). Size should be 2 (explained in India section)
115 Bell 47D Sioux - size=1, carry 1+4 is way too much - could be 1+2
61 Nigeria
124 Bell 47G has a photo of bigger Bell 47J - could be eg. 34901 - or name should be changed to 47J, since it carries 1+4 men. I don't know which version they used.
62 Chad
214 Agt 47G has a photo of bigger Agusta-Bell 47J - could be eg. 34901 (it carries 2+3 men - max for ordinary 47G should be 1+2). Icon is Alouette II - Bell 47 is 750.
69 Kenya
120 TH 55 Osage has a photo of Bell 47 - could be 36857. Carry=4 is way too much for 1+1-seater Hughes OH-55. Size should be 1, like in US oob.
74 Malaysia
308 Sioux - size 1, carry max 2
75 Zimbabwe
110 SA313 Alouette - has a photo of Bell 47 - could be 117.
76 South Yemen
110 Westland Mk.1 - unknown helicopter, has photo 6114 of Bell 47 - maybe Westland Sioux. According to Wikipedia, South Yemen used Bell 47
https://en.wikipedia.org/wiki/Bell_H-13_Sioux Carry should be 2 (now 4)
77 Yemen
110 Bell 47 - size 1, carry max 2
82 Ecuador
126 SNIAS 315B (Lama) - photo is Alouette III - could be 6525 (used as Lama by Argentina). Size should be 2, as French Alouettes.
115 Bell Scout - carry=2 size=1
83 El Salvador
120 SA-315 Lama - as above: photo is Alouette III - could be 6525, size should be 2
115 Schweizer-300 - it has a picture of Westland Scout - could be 36857
84 Nicaragua
115 Bell 47 has a picture of Westland Scout - could be 6114 (size=1, carry=2, dedicated icon is 750)
85 Peru
115 Bell 47G - as above - has a picture of Westland Scout- could be 6114 (size=1, carry=2, dedicated icon is 750)
86 Rhodesia
75 Alouette II - has a photo of Bell 47 - could be 117.
90 Uganda
120 Westland 47 - Westland Sioux or Bell 47 - size should be 1, carry=2
99 Uruguay
268 Hiller Raven - size should be 1 like in US oob
270 Sioux - size 1, carry max 2
Note: not all OOBs have been checked as regards to size standarization etc. Attached is a comparative chart, for fun.
I've attached also pictures for missile-armed Alouette III
(eg. (17) Iraq #120, (28) Netherlands #517 Alouette; (33) Spain #514 HA.16; France #488, #489, (45) Argentina #640, (53) Switzerland #214, #224 Alouette III AT - not all listed)