Hymn to the 1928 Model C

[nevhunter]

I think the plate that keeps broken spokes from getting in the brake is held in place by 3 short square headed screws that are the same as keeps a sprocket to a pushbike pedal. It's a BA thread. Nev

[Vincent.vanGinneke]

Another part that was lashed on the frame was the gearchange gate bracket.
A very recent 'addition', fresh grinder marks, not worth the name 'job' and it makes my heart sink to know there are still people around -anno 2021- that indulge in this kind of butchery. This bungler (in Dutch - prutser ) I call him 'Slijptol Sjakie' (Grinder Goofy !)

Again the original Model B at Rein's place gave me the necessary details :

the new one:

[cmfalco]

Vincent, I am very much enjoying your thread since we have a similar approach to such things. For example, I, too, have a stock of metal in order to fabricate what I can't fix (~4000 lbs. of steel, Al, brass, bronze, and plastics). Keep up the good work... no, keep up the excellent work.

[Vincent.vanGinneke]

Thanks Charles !
Nev, I could not find/buy those BA ones within time, so I used M5 sorry!
Obviously, upon final fitting I will prise one edge from the tabs over to keep the bolts from loosening.

[Karol Burger]

We made a press tool and several pieces of these covers. Thank you for pointing out that people often miss this product.

I really like watching your work, you're a pedant and that's great.

[Vincent.vanGinneke]

Hello Karol, this is absolutely FAB ! thank you , all Black Ariel riders are very happy with you

https://www.arielklub.sk/inzerat-21293- ... Ariel.html

at 13,- euro nobody can beat that with a hacksaw !

[Vincent.vanGinneke]

Burman Q 3 speed gearbox .

A 1928 (and later) Burman Q box have a large 'ear' near the mainbearing at the clutch side.
Earlier 3 speed boxes did not have this ear, those earlier ones where only held by the four base bolts.
So for once less did not mean more, well, it meant 'more flex'
But over the years and when neglected (as one does) these ears suffered a lot. The one on my Q box is a fine example of this neglect.
It broke off, got more holes and broke off again, some never learn...
A bit of alloy needs to be added .
But before any welding can be done It's vital to get the old grease out of the aluminium.
Firing it up to 350 degrees C and let it steam.....after that I kept it for a while in a bucket filled with aceton.
Did that twice. heating-aceton-heating-aceton, should be o.k. now...
Ah! for the observer; this gearbox house is possibly post 1928 as it has a (broken) tension bolt sticking in.
I leave that as it is not needed.

The Burman 3 speed gears that where in the box also had seen some rough times over the years.
As these are the 'Low Ratio' variant I decided to splash out on a brand spanking new 'High Ratio' set from the AOMCC
Today these very yummie goods arrived, from within the EU ! thanks Steve!

Below the Low Ratio set.
The centre gears are the same, 26T . The pre speedometer drive Q boxes had a stationairy layshaft

New layshaft in the top picture has a integrated trust ring with a detent milled out.
bytheway...this layshaft is machined from a solid bar...wow.

This thrust ring is definitly a improvement, before I was worried about the possibilty of the shaft rotating in the housing.
With this type of layshaft and a matching bush with pin it will stay put, it does however call for a new bush with pin.

Thanks for the cup Steve!

[Karol Burger]

I also bought one of these transmissions for my model E / 1927. I really liked it and the price is also favorable

[Bob.Murphy]

This gearbox house is possibly post 1928 as it has a (broken) tension bolt sticking in. I leave that as it is not needed.

With my OCD I'd just HAVE to get that out - needed or not .

Bob.

[Karol Burger]

we often had to weld the gearbox housing. It is very soaked in oil. The engine blocks were manufactured in a different way, they are easy to weld.