very high degree of precision moreover wheel motors 17 and 18 have an excellent output and a high delivered power to weight ratio finally wheel motors 17 18 also allow the recovery of energy during braking according to one preferred method of implementation wheel motors 17 and 18 are brushless motors which reduce servicing and improve reliability in a wet environment in order to accentuate the advantages mentioned above the motors are preferably powered from a direct current three phase source electrical control of the motors is effected by means of an electronic control unit 16 in one method of implementation of the invention this electronic unit 16 is arranged so as to allow the use of all types of batteries with a voltage of between 12 v and 72 v this unit 16 also has a phase advance switch which is used to maximise the power output of the motors 17 18 fig3 and 4 illustrate the arrangement of the propulsion resources according to the second method of implementation of the invention a support plate 19 is fixed to the chassis 1 of the vehicle and carries two vertical plates 20 21 for fixing of the wheel motors 17 18 in order to reinforce these two vertical plates 20 21 reinforcing plates 22 23 are placed between the support plate 19 and the fixing plates 20 21 the wheel motors 17 18 are fixed onto the vertical plates 20 21 and the drive shafts 24 25 of.