[Retracted] Retrospection of the Optimization Model for Designing the Power Train of a Formula Student Race Car

Table 1

Comparative analysis of various combustion engines.

Year	2020	2015	2014	2011	2010	1989
Engine model	Yamaha YZF R6	Yamaha YZF R3	KTM RC390	Honda CBR250R	Yamaha WR250R	Royal enfield 500
No. of cylinders	Inline 4	2	1	1	1	1
Displacement	599 cc	321 cc	373.3 cc	249.66 cc	249 cc	499 cc
Stroke	42.5 mm	44.1	60	55 mm	53.6 mm	90 mm
Bore	67 mm	68	89	76 mm	77 mm	84 mm
C.R	13.1 : 1	11.2 : 1	14.5 : 1	10.7 : 1	11.8 : 1	8.5 : 1
Transmission	6 speed	6 speed	6 speed	6Speed	6 speed	5 speed
Torque	61.7 Nm @10500 rpm	29.6 Nm @9000 rpm	35.3 Nm @7000 rpm	22.9 Nm @7000 rpm	23.7 Nm @8000 rpm	41.3 Nm @4000 rpm
Power	63.9 kW @14500 rpm	42 kW @10750 rpm	32 kW @9500 rpm	19.4 kW @ 8500 rpm	22.6 kW @10000 rpm	20.2 kW @5250 rpm
Cooling system	Liquid cooling					Air cooled
Fuel supply	Fuel injection