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Hi all We attended our local rally the weather was good the exhibits were good and the company was good. hope you like . there was a lot going on but we just sat back and enjoyed the day answering questions about our exhibits

That's not a silly question at all, there were a few different types of imperial thread commonly used in the UK in the past, but the O&R engines use American UNC & UNF threads which weren't used much over here (apart from some computer parts & connectors, some of which still use them). UNC/UNF is also known as ANC/ANF but sellers often only use the number or fraction and the number of threads per inch e.g. #10 x 32tpi. Below is a chart I use, created from several pages in an old reference book. All the threads apart from the spark-plug are either UNC or UNF, the spark-plug thread is metric. The starter/blower housing & carb mounting screws are both #6 x 32tpi UNC, these screws have a Fillister head. And the power output shaft (tapered version) is tapped #10 x 32tpi UNF, there is also a D shaped output shaft with no hole found on some engines. David Edit Here is a PDF of the thread chart, as the picture above has been automatically reduced in size by the forum software making it harder to read. UNC UNF Threads & Drill Sizes.pdf David

A grand day out today at the Battle of the Standard Vintage Gathering in Northallerton, North Yorkshire A one day event organised by John and Angela Webster with helpers We took three Wheelhorses along and had a good day Here's some photos...

Sure will, see you there!

It was a good day Ewan, we'll see you at Newby Hall mate

Good photos! wish I could've gone

More photos...

The thin wire from the coil low tension windings goes under the flywheel to connect to the contact breaker points and condenser. (Under a tin cover) . Another thin wire comes from the points to the kill switch which is positioned adjacent to were the throttle cable is anchored. The action of closing the throttle past the idle causes that switch to connect the coil and points to earth , thereby killing the ignition.