From the 2026 rules:LionsHeart wrote: ↑Fri Jun 07, 2024 11:33 amYes, it is very strange. It is as if they decided to use a thicker walled block and heavier pistons and connecting rods made of cast iron. It seems as if they wanted to use the same V6 architecture, so it is also unclear to me where the mass could have increased from? There is nothing to increase. I think there is a mistake in this picture.Cs98 wrote: ↑Fri Jun 07, 2024 8:41 amWhat is actually included in that V6 weight? Is it just 30kg heavier to be cheaper to manufacture? Seems like an obvious place where you could've cut 15-20kg if that's the case. https://i.postimg.cc/XqG3gVd7/f126.jpg
151-4-7-25-100 = 15 free kilograms. From this we can assume that the current V6 turbocharged engines weigh around 115 kg.
5.7.1 The overall mass of the ICE must be a minimum of 130 kg.
5.5.4 The total mass of the turbocharger (TC) must be no less than 12kg.
The mass of the turbocharger is included in the minimum mass of the ICE. That is, the actual V6 mass is 118kg, or less, if the turbocharger is heavier.
5.1.2 Power unit (PU)
The internal combustion engine and turbocharger, complete with its ancillaries, the energy recovery system and all actuation systems and PU‐Control electronics necessary to make them function at all times.
5.7.2 The overall mass of the PU must be a minimum of 185 kg.
5.19.9 The minimum mass for the ES Main Enclosure PU Mass group elements as defined in Appendix 3 to these Regulations is 35.0kg. The procedure which will be used to determine this value may be found in the Appendix to the Technical and Sporting Regulations.
5.20.7 The total mass of the MGU‐K as defined in items 25 (MGU‐K) and 29 (ERS‐K phase conductors) of Appendix 3 to these regulations must be no less than 16.0kg.
5.20.8 The MGU‐K mechanical transmission including any shaft passing across the ICE/MGU‐K boundary will be assigned a mass of 4kg.
The PU mass includes the ICE mass, the MGUK mass and MGUK transmission mass and the Energy Store.
130kg + 16kg + 4kg +35kg = 185kg.
The current rules do not specify a minimum weight for the turbocharger.
5.5.1 The overall mass of the power unit must be a minimum of 151kg.
5.3.3 The mass of the MGU-K (as defined in line 12 of Appendix 3 to these regulations) may not be less than 7kg.
5.3.4 The mass of the MGU-H (as defined in line 14 of Appendix 3 to these regulations) may not be less than 4kg.
5.5.3 The total mass of the part of the ES that stores energy, i.e. the cells (including any clamping plates) and electrical connections between cells, must be no less than 20kg and must not exceed 25kg.
The ES is not included in the minimum mass for the PU.
Hadn't noticed this before:
5.13.6 The following elements of the power unit must be installed wholly within the survival cell:
a. ES elements as defined in lines 16 and 17 of Appendix 3 to these regulations.
b. Any DC-DC converter connected to ES HV DC bus. Includes active parts, enclosure, brackets and supports.
c. CU-K. Includes active parts, enclosure, brackets and supports.
d. CU-H. Includes active parts, enclosure, brackets and supports.
e. HV DC connections between ES and CU-K/CU-H/DC-DC converter. Includes all conductors, insulation, EMC screening, mechanical and thermal shielding.
The minimum values of volume and mass for these groups of components are 22.0 l and 31.0 kg respectively. The procedure which will be used to determine these values may be found in the Appendix to the Technical and Sporting Regulations.
Some, or all, of those items are included in the ES Main Enclosure mass.
151kg + 31kg = 182kg.
So the 2026 PUs are about 3kg heavier!