Author Topic: Who Knows Douglas 2  (Read 5563 times)

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Offline Chris54

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Who Knows Douglas 2
« on: 25 Apr 2016 at 15:34 »

Sorry guys my photos are too big to get on one post, so here is the engine

Chris

Offline Doug

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Re: Who Knows Douglas 2
« Reply #1 on: 25 Apr 2016 at 17:58 »
4hp engine. Likely 1916 to 1921. The engine numbering guide on the Forum might narrow the year down. 

-Doug

Offline Doug

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Re: Who Knows Douglas 2
« Reply #2 on: 25 Apr 2016 at 18:08 »
Ah, the number would be on the missing cambox...

-Doug

Offline Chris54

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Re: Who Knows Douglas 2
« Reply #3 on: 25 Apr 2016 at 18:27 »
Ah yes, that's why there is no numbers on it.

Is it a stationary engine because there seems to be a lack of mountings to suit a frame

Chris

Offline Doug

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Re: Who Knows Douglas 2
« Reply #4 on: 25 Apr 2016 at 18:38 »
Quote
Is it a stationary engine because there seems to be a lack of mountings to suit a frame

Not necessarily. The 3-1/2 and 4hp had a weird arrangement of dovetail clamps. That is what those four, angled lugs are on the side of the base. The transmission lay on the angled face at the rear of the sump. More dovetail clamps, with pinch bolts through the two holes you see, clamped that. You slid the gearbox up and down that face to adjust the primary chain. I think these features were included on the stationary engine as well, so their presence does not mean it was explicitly a motorcycle engine. I believe the cycle and stationary engine version of the 4hp were nearly identical.

-Doug

Offline cardan

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Re: Who Knows Douglas 2
« Reply #5 on: 26 Apr 2016 at 02:48 »

I did have a cambox to suit, but I'm not sure if I've still got it... it's on the forum somewhere.

Leon

Offline cardan

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Offline Chris54

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Re: Who Knows Douglas 2
« Reply #7 on: 26 Apr 2016 at 07:03 »
Hi Doug and Leon

Thanks for the information, my knowledge is limited to the 2 3/4 but always willing (and able) to learn.

A cam box to suit would be great, do I need to find all the parts required to breath life back into an engine that i would probably not use to its full potential, it would be an interesting project if and when one was to find time, so i think maybe there is someone out there in douggie land that may have better use for it, it would probably end up with me, a bench run showpiece bit fun.

Chris



Offline graeme

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Re: Who Knows Douglas 2
« Reply #8 on: 27 Apr 2016 at 01:46 »
Just looked at the link Leon - don't know how I missed it before. The number 14554 is well later than 1914 - my late 1914 3 1/2hp is 1836. I suspect the numbers started at 1000, but assuming they were numbered in numerical order 14554 is 12718 machines later

Offline cardan

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Re: Who Knows Douglas 2
« Reply #9 on: 27 Apr 2016 at 03:04 »

Hi Graeme,
Yes you're probably right. The identification document has numbers that range up to 14,000+ (in 1922), but also a note that suggest that not all of these units were motorcycle engines. I doubt there were 13,000+ 3 1/2 and 4 h.p. motorcycles built between 1914 and 1923, but who knows.
Leon

Offline Chris54

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Re: Who Knows Douglas 2
« Reply #10 on: 27 Apr 2016 at 09:22 »
Would this per chance be the matching gearbox

Chris

Offline cardan

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Re: Who Knows Douglas 2
« Reply #11 on: 27 Apr 2016 at 10:43 »

Which is held in place by this thing: https://www.douglasmotorcycles.net/index.php?topic=5150.0

Offline oil baron

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Re: Who Knows Douglas 2
« Reply #12 on: 27 Apr 2016 at 21:43 »
Hi All
With regard to  the  3 1/2 hp cam box with the 14554  engine number stamped on it as shown; in https://www.douglasmotorcycles.net/index.php?topic=5161.msg18664#msg18664 and mentioned in this thread.

I had a closer inspection the orphan cambox,  the 554 number would appear to be the actual engine number as it is in typical Douglas typeface stamp.  The 14 is of a different typeface and is slightly smaller which may have been added at some stage.  The number 554 is in the same type face on my 1914 engine No 1783. If the actual engine number is 554 then did the numbering sequence start at 500?.  I don't think the production numbers of the 3 1/2 h.p. engines was more than 1000 units. So could it be possible that when the engine was redesigned late 1913 early 1914 that the revised design started at engine number 1000.
I have not compared the 554 cambox with the 1783 cambox internally as yet to see if they are identical. but externally they are very similar, but I have noticed that the number stamped on the 554 cambox is on the rear cylinder side of the casting and not the usual front cylinder side of the casting as on the later engine.  May be it was a replacement part, that was supplied and had the engine stamped on it, but not on the usual side.
Although the number 14554 is in the range of the last 4h.p. engines of late 1923.  the cambox is definitely 3 1/2 h.p and not the heavier built 4 h.p. component as shown in the earlier thread.
The gearbox shown is definitely a 4 h.p.,item and probably dates around 1919-20,  and the clamp shown is the correct component  for attaching the gearbox to the rear of the crankcase.
Cheers  Steve.L.




Steve L


Offline Tazmantic

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Re: Who Knows Douglas 2
« Reply #14 on: 10 Jul 2020 at 06:55 »
4hp engine. Likely 1916 to 1921. The engine numbering guide on the Forum might narrow the year down. 

-Doug

Where would I find this please

Think I found it  :roll:

Thanks
« Last Edit: 10 Jul 2020 at 07:03 by Tazmantic »