Author Topic: 1923 Douglas frame  (Read 262 times)

0 Members and 1 Guest are viewing this topic.

Offline Spike

  • Member
  • *
  • Join Date: Apr 2020
  • Posts: 8
  • Location: Geelong, Australia
1923 Douglas frame
« on: 09 Jun 2020 at 08:57 »
Hi everyone
Can someone tell me what the bottom engine lug is for, I've never seen one before. Frame is 1923.

Offline carl denton

  • Full Member
  • **
  • Join Date: Aug 2011
  • Posts: 86
  • Location: bunbury australia
Re: 1923 Douglas frame
« Reply #1 on: 09 Jun 2020 at 12:21 »
all the pre 1919 frames ,, the frames with a goose neck all had them . think they were just trying to use them up a few of my frames have them .

yours carl

Offline Hutch

  • Senior Member
  • ***
  • Join Date: Nov 2012
  • Posts: 264
  • Location: Queensland, Australia
Re: 1923 Douglas frame
« Reply #2 on: 09 Jun 2020 at 23:15 »
Spike,

As Carl says this lug was used on the earlier 2 3/4 hp frames and it is so you can take the front barrel off easily. By taking out the top bolt, but leaving the bottom one in place (but slightly loose) and then slacking off the rear engine clamp bolts you can slide the engine back in the frame. This way there is enough clearance for the front barrel to clear the front frame down tube for removal and saves you taking the engine out of the frame just to take the barrel off.

I guess you could do the same thing with the later frames by taking both front bolts out and sliding the engine back and doing the rear clamp up again to stop the engine flopping about without too much effort so is probably why they simplified the design?

-Ian

Offline Spike

  • Member
  • *
  • Join Date: Apr 2020
  • Posts: 8
  • Location: Geelong, Australia
Re: 1923 Douglas frame
« Reply #3 on: 10 Jun 2020 at 08:35 »
Thanks Ian that seems to make sense. I thought it might be a sidecar mount.
Thanks Darren