Surrey Section’s Henry Dulat Talk on Motorcycle Electrics 9 May 2018

Surrey Section’s Henry Dulat Talk on Motorcycle Electrics 9 May 2018

Henry Dulat began his talk by explaining to us all that motorcycle electrics are seen by many as a black art, but that really it’s not that difficult a problem. He went on to explain the workings of electrics to being rather akin to a water system whether it being home plumbing with a header tank or a canal system. The height of the header tank being the voltage and the amount of water flowing is the current. So a large pipe is like a fat wire in that it can allow more water to flow for a given head of water. A thin wire like a thin pipe would offer more resistance to the flow of current. Various metals are generally used for electrical conductors with the better conductors including, gold, silver, aluminium and copper. Generally copper is used as being the best compromise for cost, flexibility and the ease of use.

It is important that on a bike all the current is made to flow along the wiring, and not be assumed to flow along the frame of the bike, there should not be any flow through the head bearings as this could cause a rapid deteriorations.

Alternators and dynamo’s generate electricity by spinning magnets or electromagnets as the magnetic field cuts through the generator coils. Both systems generate an AC voltage, though the dynamo converts this to DC voltage via the commutator, where as the alternator requires an external rectifier. This generated voltage is related to the speed of the engine, so the higher the RPM this will give more voltage.

Henry went on to discuss the sort of problems that come up with bad wiring, poor switches and also bad connections, especially of the crimped variety. Henry used a magnet and a piece of metal to pass through it and this demonstrated the magnetic pull of the field inside the magnet as the piece of metal passed through it. It also showed how much the rotating armature inside a dynamo and alternators as to how much they have to over come to be able to generate electricity.

Also covered were ignition systems and how to obtain bigger and better sparks. Henry brought along many electrical items to demonstrate his talk, and also showed us how it all would work, in both practice and the theory of those components that he had brought along to illustrate his talk. Our club room was packed with very eager listeners who wanted to understand so much more about the eclectics on their bikes so therefore make them perform so much better. Henry always being on hand to help those in dire need when the electrics on their bikes cause problems when leaving to go home on so many occasions.

Can I thank Henry for taking the time and the effort to prepare for his talk and coming along to demonstrate it all and to explain in basic terms how it would all assist us by getting better electrics for our bikes? Henry is the boffin for the Surrey section and we are so very grateful that he is a member of our section, with such a huge in-depth knowledge of both electrical and mechanical subjects. Henry also helped with the many corrections for this article.

 

Anthony Curzon, Press Officer

 

Henry holding the coil with the Surrey section members

 

Henry and John Blades with all the electrical components for the talk

 

Henry Dulat discussing electrical problems with L/R John Blades, John Hirst, and Henry Dulat

Other Upcoming Events
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Feb
13
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7:45 pm Club Night @ The Stepping Stones PH
Club Night @ The Stepping Stones PH
Feb 13 @ 7:45 pm – 10:45 pm
Club Night @ The Stepping Stones PH | Westhumble | United Kingdom
We’ve Moved! – Come and find us at our new Meeting venue of ‘The Stepping Stones’ in West Humble – just down from Ryka’s near Box Hill. It’s still the 2nd Wednesday of each month[...]
Mar
13
Wed
7:45 pm Club Night @ The Stepping Stones PH
Club Night @ The Stepping Stones PH
Mar 13 @ 7:45 pm – 10:45 pm
Club Night @ The Stepping Stones PH | Westhumble | United Kingdom
We’ve Moved! – Come and find us at our new Meeting venue of ‘The Stepping Stones’ in West Humble – just down from Ryka’s near Box Hill. It’s still the 2nd Wednesday of each month[...]
Apr
10
Wed
7:45 pm Club Night @ The Stepping Stones PH
Club Night @ The Stepping Stones PH
Apr 10 @ 7:45 pm – 10:45 pm
Club Night @ The Stepping Stones PH | Westhumble | United Kingdom
We’ve Moved! – Come and find us at our new Meeting venue of ‘The Stepping Stones’ in West Humble – just down from Ryka’s near Box Hill. It’s still the 2nd Wednesday of each month[...]
May
8
Wed
7:45 pm Club Night @ The Stepping Stones PH
Club Night @ The Stepping Stones PH
May 8 @ 7:45 pm – 10:45 pm
Club Night @ The Stepping Stones PH | Westhumble | United Kingdom
We’ve Moved! – Come and find us at our new Meeting venue of ‘The Stepping Stones’ in West Humble – just down from Ryka’s near Box Hill. It’s still the 2nd Wednesday of each month[...]