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81
Douglas Racers and Racing History / Re: Douglas Racers in Spain
« Last post by Hutch on 10 Nov 2022 at 22:13  »
Quote from: Doug on 10 Nov 2022 at 13:54
...
The 'skinny' radial depth land slightly larger diameter looks more like the dummy belt rim brake of the OB model, though other aspects of the bike (airbox) do look like RA.......

-Doug

My first thoughts were the same as yours, that the front brake was OB dummy belt rim, but it almost looks like the brake block is sitting on the rim rather than in a V like the OB one is.....very hard to see, so I think you are correct and it is most likely OB. These grainy old pictures keep us guessing :-) There appears to be much "mix and matching" in the Spanish racers....!

Cheers

Hutch
82
Douglas Motorcycles - General Discussion / Re: Dougles 350 1925 motor + clutch
« Last post by anfänger on 10 Nov 2022 at 20:22  »
Hello Hutsch,
Thank you for your detailed description.
1) The clutch worked well from the start. I disassembled it for the necessary maintenance (see photo above)
2) I've tried many different tools with no success. No matter which method I used - no success and no movement at the gap between flywheel and plate.
3) Next try - heat the whole wheel - as you mentioned - with an electric hot plate (like an oven) so there is no risk of damaging the surface!

Br, Ernst
83
Douglas Motorcycles - General Discussion / S6 pistons
« Last post by Barry B on 10 Nov 2022 at 19:22  »
Hi all,

I am after options on pistons I can use in my S6.
I would ideally find a pair of plus 40 pistons but I’m also interested in any different options members have come up with.

Thanks in advance

Barry
84
Douglas Racers and Racing History / Re: Douglas Racers in Spain
« Last post by Doug on 10 Nov 2022 at 13:54  »
Quote
The picture of Spencer's RA above is not very clear, but there is something strange with his front brake? Friction material removed or something else?


The 'skinny' radial depth land slightly larger diameter looks more like the dummy belt rim brake of the OB model, though other aspects of the bike (airbox) do look like RA. In the preceding picture "passage through San Rafel" during the 1924 Guadarrama 12 Hour race it looks like there might not be an RA sump under the engine. So perhaps a bitza or hybrid racer. There were some RA models with the oil compartment within the petrol tank.

-Doug

85
Douglas Motorcycles - General Discussion / Re: B29 Front Chainguard
« Last post by cycarmark on 10 Nov 2022 at 12:55  »
I did not see it in any photo.  Maybe I was not clear, I do have a chain guard (picture attached) but was wondering if there was any part that wrapped around the clutch sprocket in front as shown in the photo in my first message.
86
Douglas Racers and Racing History / Re: Douglas Racers in Spain
« Last post by Hutch on 10 Nov 2022 at 10:23  »
Quote from: cardan on 10 Nov 2022 at 02:32
In another photo, you can see that the "big tank" bike is RA - the gearbox is close-coupled to the engine.

Leon

Hi Leon,

I wonder if the "big tank" is a modified OB one - made to fit the RA frame?

The picture of Spencer's RA above is not very clear, but there is something strange with his front brake? Friction material removed or something else? Hard to see - hopefully we can find a better picture of it.

-Hutch
87
Douglas Racers and Racing History / Re: Douglas Racers in Spain
« Last post by Hutch on 10 Nov 2022 at 10:13  »
Two pictures of Eric Spencer riding a RA at the 1924 Guadarrama 12 Hour race. He was 2nd in the 500cc class with just over 735km travelled. Mateos on another Douglas was 3rd with 705km travelled. (The winner in the 500cc class was Vidal on a Norton who covered 775km).

From Heraldo Deportiva 15th July 1924 (supplied by Javier).

-Hutch
88
Douglas Motorcycles - General Discussion / Re: B29 Front Chainguard
« Last post by Alan on 10 Nov 2022 at 06:48  »
Type B29 into the members forum search engine....clearly shown in the pics
89
Douglas Racers and Racing History / Re: Douglas Racers in Spain
« Last post by Hutch on 10 Nov 2022 at 06:22  »
I will double check the race numbers......

EDIT:- From Heraldo Deportiva 25 May 1924 the rider numbers were listed in the text as;

Whalley 11, Spencer 15, Santos 16 and Ala 5 (on 350cc S1 not RW as I queried in reply #23).

The order of the riders listed in the caption  in the picture in post #23 does not appear to match the order they are lined up in - so so looks like I mixed up Santos and Alȧ in reply #23 but might have it correct in reply #24 - don't believe what you read in the press!

The person on No 15 looks young and I think is Spencer.

-Hutch


90
Douglas Racers and Racing History / Re: Douglas Racers in Spain
« Last post by Hutch on 10 Nov 2022 at 06:20  »
Leon, the last picture from your post above shows Alȧ on number 5 lined up behind the other 3 Douglas machines so my guess from reply #24 is confirmed :-). An extra issue with the S1 may have been the spindly crank? Not sure about the spindly frame as part of one I picked up seemed to weigh quite a bit! Frame cracking issues seemed to plague the OHV models (including RA) for a while in the mid 1920's - not quite sure how Douglas resolved that other than going to a thicker gauge of tubing?

Ah! - AMAC TT carby released in 1923 but I didn't find it listed in any of the AMAC catalogues I have (i.e. 1923-1928). So maybe only sold to general customers from 1924 onwards?

Spencer went on to do well in Trials events in the mid-late 1920's with Douglas (some info in Clew TBT) but I have not looked into his career yet. I have a couple of pictures of him in action in Spain that were coming up next.

EDIT:- You replied about Spencer while I was writing this reply!

-Hutch
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