26th-Apr-19, 08:53 AM
Hi Richard,
Thank you for your kind words ....
(the cheque is in the post 
)
To date, I have now received five of these new versions for repairs. Four have been down to blown FETs and one was the large yellow tantalum capacitor C4.
This particular one appears to have been caused by a gear meshing problem. This was only identified by slowly turning the back wheel slowly whence a firm click was felt. Reversing the movement revealed that it was just one tooth catching. Therefore, we must look at the near motor-stall speed of the car as any small fault will be magnified.
On a more general view, part of the problem is that the FETs are only a bit more robust than previous incarnations used by Scaley. That in itself is not a bad thing but with the tendency to miniaturise components and reduce the size of the copper track on which they are fixed down, collateral damage is more likely.
Thank you for your kind words ....
(the cheque is in the post )To date, I have now received five of these new versions for repairs. Four have been down to blown FETs and one was the large yellow tantalum capacitor C4.
This particular one appears to have been caused by a gear meshing problem. This was only identified by slowly turning the back wheel slowly whence a firm click was felt. Reversing the movement revealed that it was just one tooth catching. Therefore, we must look at the near motor-stall speed of the car as any small fault will be magnified.
On a more general view, part of the problem is that the FETs are only a bit more robust than previous incarnations used by Scaley. That in itself is not a bad thing but with the tendency to miniaturise components and reduce the size of the copper track on which they are fixed down, collateral damage is more likely.
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