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Chain-Drive Frazer Nash


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I ran across this drive system while looking at a billion other things and I have become quite intrigued.  I know its not really practical and not really the best way of designing a drive system, but that's why it grabs my attention (I must have been Rube Goldberg in my previous life).  Anyone have direct knowledge (owner / driver / saw once at a car show) of this system? I found a book on Amazon about it, but it won't be here until Feb 3-8 and I love hearing first person information.  

 

https://poeschloncars.blogspot.com/2017/01/chain-drive-frazer-nash-not-your.html

 

chaindrive.jpg

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I just realized I’ve seen part of that video when looking for Jay Leno doing additive manufacturing to make parts, I didn’t realize then it was for the Frazier Nash.  Maybe that’s why I was drawn to it subconsciously as I had already seen it working.  Just imagine, if my memory is that bad now at 47, I’m going to be able to plan my own surprise birthday parties when I hit 60 because I will forget all about the planning. 

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Frazer Nash started out building cyclecars, small cars with a motorcycle engine like an early Morgan. The chain drive lashup was a cheap light duty way to make a transmission.

Later they made larger (but still small) sports cars with 4 cylinder and a few six cylinder engines but kept the chain drive lashup probably because it was cheap and they had it.

Don't know any advantage other than cost, and that you could change gear ratios by swapping sprockets. One disadvantage was no rear differential which meant skidding the tires around corners. Not much of a problem on the first very light low powered cyclecars but something you had to be wary of in the later models.

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Last Frazer Nash built 1957. They began assembling BMW sports cars in 1934 and selling them as Frazer Nash BMWs. Last chain drive Frazer Nash 1947. From 1948 to 1957 they made only the FNBMW. And they only made 85 of them in 10 years. They were using BMW engines built under license by Bristol, when they stopped making the engines FN stopped making cars and became the English distributor and importer of Porsche cars.

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