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71
Douglas Motorcycles - General Discussion / Re: S.L. Bailey
« Last post by Hutch on 07 Nov 2018 at 05:04  »
Leon,
Well I was wrong with the identification of Alexander’s OHV Douglas at the 1913 Weston-super-Mare speed trials – it was indeed the first outing of the Douglas factory version of an  OHV 2 3/4HP (as opposed to the Bailey / Bradshaw version) – I guess the moral is don’t believe what you (don’t) read in the press! Great research Leon, but I still wonder why it wasn’t reported in The Motor Cycle ?

here is another picture of the event;

“4th October 1913: At the Bristol Motorcycle Club Speed Trials at Weston-super-Mare, A H Alexander, riding a Douglas, gets off to a fine start in the first heat of the first event”

https://www.gettyimages.com.au/detail/news-photo/at-the-bristol-motorcycle-club-speed-trials-at-weston-super-news-photo/3308629


Of course Getty images have managed to put their watermark right where we want to look and the price of the image is way out of my range….

(Apologies for the next two picture from the same source, as I’m a little off topic. They are not of OHV bikes nor about Les Bailey but might be of interest to Douglas enthusiasts;
“4th October 1913: H Douglas at the wheel of the new Douglas Cycle Car, at the Bristol Motor Car Club speed trials, Weston-Super-Mare.”

https://www.gettyimages.com.au/detail/news-photo/douglas-at-the-wheel-of-the-new-douglas-cycle-car-at-the-news-photo/3252808

“4th October 1913: W Douglas at the wheel of the new Douglas cycle car, at the Bristol Motor Car Club speed trials, Western Super Mare.”

https://www.gettyimages.com.au/detail/news-photo/douglas-at-the-wheel-of-the-new-douglas-cycle-car-at-the-news-photo/3252863
)
72
Douglas Motorcycles - General Discussion / Re: S.L. Bailey
« Last post by cardan on 07 Nov 2018 at 03:21  »

As I mentioned earlier, arguably the most interesting of the early OHV Douglas racers was the four-valve-per-aluminium-cylinder machine that appeared at the Weston-super-Mare in September 1919. The Motor Cycle, 4 September 1919, described it thus:

"A new racing Douglas, with F. G. Ball as the rider, had an engine with aluminium cylinders and four valves in each head - two inlet and two exhaust - each pair being operated by a single overhead rocker and oblique tappet rod from the timing case. The machine had evidently not been tuned to its fullest pitch, according to the results gained in the events."

Les Bailey rode a 1914-TT-style machine at this event, and defeated Ball in all events. The eight-valve machine was short-lived, perhaps because of its rather "veteran" cylinder/head design, where the ports were cast integral with the aluminium cylinder and the valves (presumably) dropped in from the top together with their seats and springs. The seal between the parts must have been difficult with the different expansion between the aluminium and iron/steel.

There is a photo of the eight-valve engine in Clew (incorrectly dated as 1913 in my 1st edition), but I can find no description of it in the various Douglas books I have. Is the Clew photo period, or did the engine survive? Indeed have any of these early OHV Douglas engines survived?

Cheers

Leon
73
Douglas Motorcycles - General Discussion / replacement T35 front end
« Last post by flea on 06 Nov 2018 at 22:59  »
have a T35 without a front end and here in aust not really exspecting to find one soon , any ideas on what other brand bike front ends may fit (from steering head bearings down ) doesn't have to have the leading link forks , was wondering but havent checked yet the bsa bantam might do , don't want to do any major alterations in the hope can eventually find the right one .. thanks just want to get it rideable while the search goes on .. would like to hear fom any one in oz who may have one laying around (you never know)
74
I'm back looking at EWs for sale, I've been distracted with a few other projects- finding a dolls head box to replace the Burman box on our 16H, isolastics on a Commando, new con rod and piston on newer mx bike, crankshaft oil seals on an RD250 and re assembling My 70s Husqvarna wr250- most of all this is work in progress... still!
I looked at the EW for sale at Tiermans and it was ok but needed too much work to make tidy- tank and frame needed re painting, rear wheel needed restoring, decomp missing etc. It looked a good usable bike but I wanted something more presentable and I really could do without another project.
I saw this on Car and classic but taking into account it needs parts re plating It again seems too pricey.
I may go and look it nonetheless.

https://www.carandclassic.co.uk/car/C1025866
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Douglas Motorcycles - General Discussion / Re: Dragonfly Amal 375/7 Wanted
« Last post by BrmBrm on 06 Nov 2018 at 12:15  »
Re Amal 375/7
Just did a buy it now.
The carb fitted to my Dragonfly is 375/6 25/32".
Only 1/32" smaller, and I suppose that would have only made a difference on full throttle, and with the miles of induction pipe to the cylinders perhaps wouldn't have made any difference. Anyway I'll be happier with 375/7 13/16".
Thanks for the tip off Red.
It will be one less frustration, of the many weird things that have been done to this bike.
77
Douglas Motorcycles - General Discussion / Dragonfly Amal 375/7 Wanted
« Last post by BrmBrm on 06 Nov 2018 at 11:06  »
Hi all,
Dragonfly Amal Monobloc 375/7 Wanted
Complete or body
Thanks
78
Douglas Motorcycles and Parts Wanted / Mark V swinging arm wanted
« Last post by stclair on 06 Nov 2018 at 09:58  »
Swinging Arm wanted for Mk V project

The front hub I wanted is now found just a Mk swinging arm required

Kevin Cunniff 0131 555 4145
79
Douglas Motorcycles - General Discussion / Re: S.L. Bailey
« Last post by cardan on 05 Nov 2018 at 21:04  »
Three overhead-valve variants pre WW1. Bailey's December 1912, Alexander's October 1913 and one of the 1914 TT bikes from April 1914.

Leon
80
Douglas Motorcycles - General Discussion / Re: S.L. Bailey
« Last post by cardan on 05 Nov 2018 at 20:38  »
The Weston-super-Mare report, from Motor Cycling 7 Oct 1913:

"A very interesting machine was the new 2 3/4 h.p. overhead-valve Douglas racer, which was ridden by A. Alexander. The inlet and exhaust pipes are of very large diameter, the valves themselves being carried in the heads. It will be remembered that we gave particulars in July last. The valves are operated by neat adjustable tappets, the upper ends of which fit into cupped rocker arms. The crankcase release lubricates the overhead valve gear by blowing on to it. Lubrication is by drip feed to both cylinder walls. The radiating flanges are very deep and the frame is slightly longer than the standard 2 3/4 h.p. models. The machine did very well in its first heats, but the gear could not be changed in the final, and in the end a broken chain put Alexander out of the running."
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