F1technical.net

jjn9128 wrote: ↑

25 Aug 2021, 16:39

SiLo wrote: ↑

25 Aug 2021, 16:23

I'm still confused about the regs for the hypercar category to be honest, but at least they look nice!

There's 2 different regs is why. LMH is the ACO/FIA version, and LMDh is the IMSA version (Le Mans Daytona hybrid). BOP'd to equity so they can race in both series'. LMH is designed from scratch, while LMDh is based on a LMP2 chassis like the current IMSA prototypes but with some small styling tweaks to differentiate them. Then there's the whole mess of the Alpine entry, which is a LMP2 with a different engine and some BOP tweaks but was allowed this season only (though probably next season also) basically to fill out the entry list.

So far the only confirmed LMH are Toyota, Glickenhaus, Peugeot and Ferrari (byKolles technically also but that may never actually happen). The rest of the confirmed entries are LMDh - Audi, Cadilac...etc.

SiLo wrote: ↑

25 Aug 2021, 17:13

For LMH - how do they differentiate from the older LMP1 cars? They all end up looking the same... Do they need to produce X amount of road cars to homologate these ones?

jjn9128 wrote: ↑

25 Aug 2021, 18:05

SiLo wrote: ↑

25 Aug 2021, 17:13

For LMH - how do they differentiate from the older LMP1 cars? They all end up looking the same... Do they need to produce X amount of road cars to homologate these ones?

That's a great question. Not by much is the answer. The LMH rulebook actually has sections with slightly different rules for prototypes vs production based models. Basically I think they didn't get enough OEMs signed up and Glickenhaus and byKolles queried why independent teams were being frozen out - so it's still really a prototype series. Toyota might do a production run of 300 cars which I think is the minimum.

The LMH rules though have some very strict BOP measures. A minimum weight like most series, plus length, width, height. There's a strict power curve for the engine. Then downforce, drag, and aero-efficiency are regulated - which allows the geometric rules to be relaxed.

So compared to LMP1 the LMH are heavier, less aerodynamically efficient, and power limited. But not necessarily based on production models as originally intended.

SiLo wrote: ↑

25 Aug 2021, 17:13

jjn9128 wrote: ↑

25 Aug 2021, 16:39

SiLo wrote: ↑

25 Aug 2021, 16:23

I'm still confused about the regs for the hypercar category to be honest, but at least they look nice!

There's 2 different regs is why. LMH is the ACO/FIA version, and LMDh is the IMSA version (Le Mans Daytona hybrid). BOP'd to equity so they can race in both series'. LMH is designed from scratch, while LMDh is based on a LMP2 chassis like the current IMSA prototypes but with some small styling tweaks to differentiate them. Then there's the whole mess of the Alpine entry, which is a LMP2 with a different engine and some BOP tweaks but was allowed this season only (though probably next season also) basically to fill out the entry list.

So far the only confirmed LMH are Toyota, Glickenhaus, Peugeot and Ferrari (byKolles technically also but that may never actually happen). The rest of the confirmed entries are LMDh - Audi, Cadilac...etc.

For LMH - how do they differentiate from the older LMP1 cars? They all end up looking the same... Do they need to produce X amount of road cars to homologate these ones?

NL_Fer wrote: ↑

26 Aug 2021, 22:55

They look the same at first, but in reality a hypercar is bigger (longer, wider, higher) than an LMP. Size is now compatible with the GT’s and other street cars. Also so weight is increased from 870 to 1030kg. Maximum combined power used to be almost 1000bhp, hypercar only has 680bhp. Electric drive is front axle only now, instead of both axles or one axle + exhaust heat recovery.

In short, a hypercar is bigger, heavier, less powerfull less downforce than an LMP1 used to be.

Morteza wrote: ↑

27 Aug 2021, 16:44

https://twitter.com/followWRT/status/14 ... 56643?s=19

Cold Fussion wrote: ↑

27 Aug 2021, 07:24

NL_Fer wrote: ↑

26 Aug 2021, 22:55

They look the same at first, but in reality a hypercar is bigger (longer, wider, higher) than an LMP. Size is now compatible with the GT’s and other street cars. Also so weight is increased from 870 to 1030kg. Maximum combined power used to be almost 1000bhp, hypercar only has 680bhp. Electric drive is front axle only now, instead of both axles or one axle + exhaust heat recovery.

In short, a hypercar is bigger, heavier, less powerfull less downforce than an LMP1 used to be.

Wasn't that 1000 hp limit only specifically at Le Mans in the old LMP1 regulations?

Morteza wrote: ↑

06 Oct 2021, 10:59

https://twitter.com/AlpineRacing/status ... 2292395014