@
he-man
Your logic is as crazy as saying ' ISRo started by making sounding rockets of french and US design so the credit for all the progress isro made on Launchers go to them'
Just read the article again-which you posted without reading.
497 can be ' considered ' as a chopped of 697-not the same,but with reduced no of cylinders.
Now your article says 497 SP do not have anything to do with 697.Did you even see that??
And the same 497 SP went into Sumo and first gen Safari.
And the Indicas 475 DL DI was made by reducing bore of Sumo 483 DI.
So there you have it,even the ' chopped off ' 497 is a different engine-so nothing more to say about the other engines
Now what about Tata's new engines- 2.2 l dicor? 1.05 litre DICOR?
Ashok Leyland now develops Neptune Series engines on its own.
Mahindra develops their own engines-meagle,mhawk & mCR100?
they design engines for backhoe loaders,tractors and motorcycles.
Bajaj and TVS develops their own engines-DTSi technology is patented by Bajaj.
Heck even RE started making their own UCE engine....
So next time Check the facts before copy pasting.
And Do you know how many countries have developed their own Closed loop cryo engine?
ISRO has another 2000 kN semi cryogenic engine under development