28 Black Ariel shock absorber

[conmuller]

My 28 Model B shock absorber spring in the primary is missing. Where do you find them or a diagram on how it is put together. Have the sprockets and nuts with lock washer. Any help please Conrad

[tony.barnett]

Single Spares might be able to help or advise.

[brenton.roy]

Single spares would be your best bet - otherwise I think someone in the Ariel Register may have had some made. From memory, they were made from flat or oval wire. One of the Aussie members may know.
There is a 1928 parts book in the club library.
You need lock washer, two nuts, a stepped washer which fits into the spring, sliding member and sprocket.

A few years ago I lost the lock nut here.. Not really a fun experience.
https://www.google.com.au/maps/place/31 ... 44.4608568

[Ian.Taylor]

If Pat doesn't have the spring then you can try the Slovenský Ariel klub here https://www.arielklub.sk/magazin-co-je- ... ensko.html
They have many parts for the Black Ariel.

[cmfalco]

or a diagram on how it is put together.

Conveniently, my '28 Black Ariel engine is on my workbench. It will be a couple of weeks before I will have a chance to continue with its disassembly, but I can give you approximate dimensions.

The order of assembly is:
-- an adapter slips over the end of the crankshaft. This adapter has the ID of the crank and an OD of approx. (or precisely?) 1-1/4"
-- a spring made from oval wire slips over the adapter. Depending on how you want to count them, it has about 3 coils and is compressed to ~0.7" in its installed state. The ID of the coils is roughly the OD of the adapter (i.e. ~1-1/4") and the OD is 2", so the oval wire is ~3/8" thick by ~0.15" wide. Once I disassemble it in a few weeks I will be able to measure the spring constant.
-- the inner part of the 2-lobe shock absorber.
-- the sprocket with the outer part of the 2-lobe shock absorber.
-- two nuts to hold it all in place.

I hope this helps.