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Ian, since the in wheel drives place the power precisely at the point of application, I think you can understand the effectiveness.
The drives will be subject to considerable pressures in the cylinders and pistons, with the hub enlarged to allow the offset journal location, the bearings will be around 3-4 inches in inside diameter. In this case they have a capacity of about 12,000 pounds load per wheel, while the whole assembly would weight about the same as the disc brakes assemblies they would replace.
If that proves to be more practical than just mounting them inboard, like the brakes on the Jag XKEs then that would eliminate the need for any drive shafts to connect the drives to the wheels. If not them move them inboard and cut total suspended wieght by over 50%.
The drives would be "flooded" eliminating the necessity for any sealing of the individual piston-cylinder assemblies. Thsi would also provide cooling for the hydraulic fluid. If temps rose above normal you could also add a radiator in the return (low pressure) circuit, but then again you increase complexity and inefficiency.
regards
Mech
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