I need to clarify this once more. Indonesia invest 20 % for the program, along with 20-30% of man power since design process started in 2011 until design process is completed in end of 2019, along with part manufacturing for several prototypes, tandem seat design work package from Indonesian Aerospace home office during 2020 period after all design engineers come home in May 2020, as well as some 35-40 technicians as first batch of Indonesian team come back to South Korea in August 2021-until the number increase into around 100 again in the end of 2022 inshaAllah.
I have posted 2020 Indonesian Aerospce document related to KF21/IFX program in KFX/IFX thread for the year 2020 where since May 2020 all Indonesian engineers have come back to Indonesia. That is the work done in Indonesian Aerospace office (design center) and production facility in Bandung, West Java.
For All population of KF21/IFX
20 % stake also means some fuselage parts for ALL KF 21/IFX program will be produced by Indonesian Aerospace, half of the wing, and other parts as well, there is article I have posted in KFX/IFX thread talking about the parts whether the article with quote from Indonesia KF21/IFX program manager in 2016 news and also recent 2021 news with quote coming from Minister of Planning, Finance Ministry spoke person, and also Foreign Ministry high profile official.
All in here meaning to whole KF21/IFX population, whether for Korean, Indonesian, or other countries ( export). Sorry I need to high light the word since there is one Indonesian member in other forum tries to play down Indonesian role and participation despite he doesnt have any connection to the KF21/IFX program, just some one seeing from the outside with his own speculative idea.
Testing data and fifth prototype for Indonesia
Not to mention Indonesian Aerospace will get all flight data information during the test flight and static test data and also one prototype as vehicle to develop the plane further by the company and the means to learn more on designing STEALTH fighter jet since having the plane means we can now test the plane in real after so many years designing and data being taken from wind tunnel and CFD analysis and also in sector of aerostructure and system integration development.
The designers have been working since 2011, having one prototype and all test data during development is very essential for their expertise development. Having one prototype which is owned by Indonesian Aerospace is very important, while foreign plane used by Indonesian Air Force cannot be used by Indonesian Aerospace legally. The engineers will have freedom to do many kind of test and development using that prototype, this is why having one prototype for PTDI is important and become our demand before making a deal with South Korea in 2009.
Export right issue
The problem on export right is not about exporting the fuselage parts and to become part of supply chain, but whether Indonesia can sell the plane in one complete plane, not just in the form of parts. While based on current agreement complete plane production can only be done for Indonesian own order.
Production
There is statement ( also need confirmation as we need to be critical as person/ not easy to be mislead or cheated by people ) Rafale order offer 20 % local production as offset, but this is still small compared to KF21/IFX local production which not only include significant part production, but also assembling, system integration and produce whole plane in Indonesian Aerospace that include testing as well. Not to mention Indonesian Aerospace will be part of KF21/IFX supply chain with quite significant part production portion for whole KF21/IFX population.
Wingman Program
KF 21/IFX will use wingman drone, thus it will be a more capable fighter and Indonesian Aerospace can use this KF21/IFX capability to design its own Wingman drone and produce it for Indonesian Air Force demand which I believe will be quite many if one KF21/IFX is accompanied with 3 Wingman drone.
Upgrade program
The upgrade of KF21/IFX can be done in the country based on statement from Indonesian KF21/IFX program manager, thus it will reduce the operation and maintenance cost quite significantly while providing jobs and experience to our own engineers, and this privilege can lead into more subsystem produced by Indonesian local companies like PT LEN Industry, PT Info Global, Pindad, Dahana and others