IF you actually see what you written as an example then you do sound like an ignorant guy.
USAF: F-15 and F-16 the only difference is heavy and light or medium?
If you read any official USAF document, they never mention F-15 as HEAVY or Medium LCA
F-15 was primarily 4th Gen Air superiority Fighter and now it has also evolved into plane that can conduct Strikes
F-16 is Multi role combat aircraft,
PLAAF does not denote Flankers as heavy fighters, they simply denote them as Long Range MRCA. and J-10 having short range are denoted as Short range MRCA.
Now in RuAF what is light plane here? Flankers are used as Long Range Air superiority planes and MiG-29 end up being short range planes. Dont forget that Russia also uses Tu-22 and Su-34
Su-34 is long range deep strike plane, else you might in your "knowledge" make a Super Heavy plane.
For Japan and Singapore same as USAF.
French air force should be interesting, The French have actually closed the Mirage 2000 line almost decade ago, Also the French were producing Rafale to replace Mirage 2000 in all roles, Please ask any French member, they would educate you in this,
With the RAF/Luftwaffe you sound the most stupid, Tornado is fighter? In Tornado and Eurofighter which is the light / Medium or heavy one?
Eurofighter is 11 tons empty weight and Tornado is almost 14 tons, both have twin engines. Would difference of this weight be good to classify them as per your theory or light /medium?
You should read about these planes the most as the way you answer it, only fool can say that
The countries that you mentioned developed and use Tornado as IDS (Interdiction and strike) and SEAD/DEAD roles . There was a fighter version called Air Defence version which was mainly designed as an interceptor and used by Brtish (because they wanted it) the Italians and Saudis,
Why did Luftwaffe not take them and went with Eurofighters?
The Fact is that Tornado is a good strike aircraft and its used only in this role, Eurofighter was developed as the Air superiority plane and the strike was to be handled by Tornados, but now since the cost of operating and Maintaining Tornados is becoming higher, so the users want the Eurofighter to even carry the role of a strike aircraft making it truly MRCA.
Please do get your facts right, and if possible see the Web sites of the respective air force which classify them as Heavy or Medium or light, or do they classify them as per the roles,
You have truly got too deep into the description of IAF done for fattening their own pockets that they find any way to get the plane (and kickbacks)
As already stated:
Most major forces in the world split their fleets into 2 types and a heavy high, as well as medium lo mix.
USAF - F15/F16
PLAAF - Flankers/J10
Russian AF - Flankers/Mig 29
Israeli, Singapore, Japanese AF - F15/F16
French AF - Rafale/Mirage 2000
German, British, Italian AF EF/Tornado
Spanish AF - EF/F18
...
...
...
It's in fact only India, that have the triple weight class, which as explained, comes from the fact, that LCA started before we got MKIs and I am criticising the shortsightedness of that decision for a long time.
But either way, the hi lo mix in most cases (except the Tornados), is based on having a multi role medium class fighter for the basic missions at reasonable costs, while having a high performance and heavier class fighter on top.
No they dont, the F15 is the prime air superiority fighter for the USAF, but since the E standard, also one of the prime strike options. The arrival of multi role capability changed the dedicated role thinking, which is evident in the USN as well, which cut down from up to 4 different tyes for different roles, to 2 multi role once and the Growler being part of the multi role fleet.
Russia has moved to multi role fighters as well, which is why Su 34 multi role fighters, replace Su 25 strike fighters. They however geared Su 35 and 34 some more to A2A or A2G, which however was not a good decision as it seems, since they later added the Su 30 SM as well, which is the counterpart for the F15E and more balanced for both roles.
Russian Navy moved from single role Su 33, to multi role Mig 29K and plans with naval Su 57
If the weight classes were so important, why was the MMRCA was called MRCA?
Because the MTOW was the key criteria to keep certain fighters out. Intially it was 20t MTOW, in MMRCA it was 30t to keep heavy class fighters out.