An interesting question. I'd always assumed when the flat bottom (between front and rear wheels) rule came in all the teams ran with a rear diffuser from the outset, e.g. this is the McLaren MP4-1 diffuser - it's even exhaust blown.Xwang wrote: ↑Wed Jun 24, 2020 4:29 pmHi everyone,
I know that until 1982 F1 cars had Venturi channels and some of them had those channels that ended at the front of the rear wheels.
Then, in 1983, the rule dictated that the underbody had to be flat and some cars didn't have a diffuser and some didn't even have a covered engine (my 1:24 scale Ferrari 126c4 bburago model has the bottom of the engine uncovered and I suspect that the first Ferrari to have a diffuser was the 126c4m introduced in the second half of the 1984 season).
So which car was the first to have a diffuser similar to those currently in use?
The bottom of the engine or the gearbox? Can't imagine any team would leave the bottom of the engine exposed after 1979. The drag saving just too valuable.
Well the "old man" was quite outspoken on his views on aerodynamics Can you link the drawing?
The drawing is in a printed book covered by copyright so I cannot post those images.
It seems a most unwise design indeed! This Ferrari does not appear to using ground effect to the full extent, especially given you would presume the designers would be keen to recover any bit of ground effect they could being quite experienced with the concept by this time.Xwang wrote: ↑Sat Jun 27, 2020 3:06 pmThanks!
For example from this drawing:of 1983 126C3 car:
https://www.motorsport.com/f1/photos/fe ... /11446688/
It seems that the diffuser is short and do not cover engine and gearbox.
For what it is worth, this is how the 126C4 was made by BBurago:
It seems like every car apart from Ferrari then.