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David, there was another fella from your way (Oz) selling one about a year ago. If you could find the thread it would help regarding price. In UK it might fetch about £3k, but I think prices are a bit softer in Australia. Good luck with the sale.
Douglas Motorcycles - General Discussion / Re: DT/SW5 Engines
« Last post by Buzzie on Today at 11:50 »
Hi Eddie, helpful and speedy as ever! Thank you for the info, just what I needed to know. Luckily it's the frame and not the forks I need to get repaired, so it should be pretty straight forward. I understand that 531 is a bit tricky to mig or Tig weld so glad to be avoiding that!
Thanks again,
Best wishes, Douglas
Douglas Motorcycles - General Discussion / Re: DT/SW5 Engines
« Last post by eddie on Today at 11:24 »
As I understand it, the early Dragonfly cycle parts were manufactured by Earles Engineering. The frame and forks were made from cold drawn mild steel tube but problems were encountered with the front forks, so the specification for the fork tubes was upgraded to Renolds 531 tubing.

You may have noticed I forgot to put a price in the ad. That's because I don't know what it's worth and am hoping for some guidance. I'm not looking for mega dollars but don't really know what I could expect to get for it. Lots of you have seen the post but no one so far has offered any suggestions or help. I'm in your hands gents. It starts and runs. There is some wear on the kick start gear as occasionally it will jump a tooth when starting it. Other than the missing pillion seat (I presume there should be one) it's pretty original. I have books and other paperwork that my dad gave to me and naturally all will go with the bike.
Douglas Motorcycles - General Discussion / Re: DT/SW5 Engines
« Last post by Buzzie on Today at 07:54 »
Its been a while since I last posted an update on here.

Unfortunately Buzzie with her Douglas DT Engine didnt get to race at the Goodwood Revival in September. We had hoped that we would get a late entry if someone withdrew. We were at the top of the reserves list but no one pulled out after the test day at Goodwood. Avit were preparing several other entries for Goodwood, including a1936 Maserati 6cm Grand Prix car, see pic below. So naturally they concentrated on getting these cars ready and work on Buzzie temporarly stalled.

Ive been up to see her since then, and met with Ewen from Avit to agree the way forward. The engine is ready for installation in the car. It has had to have a new flywheel made because the Douglas one I provided is too great a diameter and fouled the floor, and more critically the primary chain gears didnt line up when the output sprocket and the secondary chain lined up with the sproket on the back axle. That position is set by the structure of the car, as is the position of the engine, so the flywheel sprocket had to move! Incidentally I suspect that Buzzies floor originally had a slot cut to provide clearance for the Douglas flywheel. You can't see the floor in the surviving photos, but the flywheel looks like a standard Douglas one. Obviously the new flywheel needed to have its shaft taper and keyway to match the Douglas crankshaft.

The new aerofoil shaped tank is complete. It has two compartments, one for petrol and the other for the oil. It has a 20 litre fuel capacity to allow for the high fuel consumption of the alcohol powered engine. The car should be able to complete a 20 minute race without issue. We have decided to install the kick start of the Norton gearbox so the engine can be kick started when the starter donkey engine isnt available.

As part of my Goodwood preparations I repaired and serviced the donkey engine I mentioned earlier. This is a trolley mounted Briggs and Stratton 8HP engine which turns a small roadwheel. The tyre on this road wheel is pushed up against one of the rear wheels to rotate them, and hence the engine to start it. The rear wheels are obviously jacked off the ground!

The plan now is to have Buzzie up and running to compete in some 500 OA events next season, so we can have more relaxed preparations for the next 500 Race at Goodwood, which is likely to be in 3 or 4 years time. I feel that with a decent competion record over the next couple of years Buzzie is much more likely to get an invitation to the next 500 Race at Goodwood.

In the meantime I thought I should have a Douglas to ride, and during a recent visit to Chris Wright to discuss my 2 3/4 HP project he very kindly showed me his wonderful collection of Douglas's of all eras. I was very taken by his Dragonflies, and when one came up on eBay a few weeks later with limited interest I bid, and won it at a very decent price. I collected it last weekend and rode it around some local sights as soon as I got it home. It runs very nicely and I think Im going to enjoy it. I have insured it so I can ride it to work if the notion takes me! It does need a minor frame repair, so if anyone knows what grade of steel its made of I need to know so I can get it welded up.
Douglas Motorcycles - General Discussion / Re: S.L. Bailey
« Last post by Hutch on Today at 05:11 »

Your excellent picture of Ball in post #161 appears to be the same bike shown here at Brooklands but on another occasion;


Douglas Motorcycles - General Discussion / Re: S.L. Bailey
« Last post by Hutch on Today at 03:29 »

The picture you referred to in post #160 of Alcock with his 1914 OHV Douglas from the Hartley Collection, looks like it  appeared in The Motor Cycle on June 26th 1919 after his success flying across the Atlantic and again on 1st January 1920 after his fatal crash in France.

From references to Alcocks training after joining the RNAS documented in Flight magazine in late 1914 and 1915 the aeroplane he is front of would most likely be a French Caudron (possibly model D or F ?) which was used as a training and reconnaissance plane. He was listed as Temporary Warrant Officer 2nd grade on 19th November 1914 and was promoted to Flight Sub-Lieutenant, for temporary service, 29th December 1915 (announced Flight 6th January 1916).

Alcock’s OHV Douglas does appear to have a lot of similarities with the ones shown Tony’s great  photos in Post #161, albeit it being in road going trim.

An ex-Alcock 2 3/4HP OHV Douglas was for sale in The Motorcycle on 16th October 1919, maybe Baxter was trying to cash in on Alcock’s notoriety at the time?

Looking forward to seeing the picture from the Hartley Collection if you can get permission !


Douglas Motorcycles - General Discussion / Re: Douglas Aero 1937
« Last post by Aero on Yesterday at 20:57 »
I used 2 x 0.3mm shims to get my endfloat correct, in conjunction with 0.25mm thick paper gaskets between the crankcase halves.
Might be a good starting point?
PS that is in conjunction with the 2 oil slingers, which are each 1mm thick
I have a spare Dragonfly brake pedal, hope I am not too late
Douglas Motorcycles and Parts Wanted / wanted - DT/Sw seat frame
« Last post by roger h on Yesterday at 19:41 »
Does anyone have a frame for the saddle on a DT/SW, please? I have the seat pan, just need the frame which picks up the fwd saddle mount on the top tube of the frame, and the coil springs at the back? Just a sketch would do??
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