Author Topic: 1802 Bell Crank Engine  (Read 79369 times)

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 12338
  • Hampshire, england.
Re: 1802 Bell Crank Engine
« Reply #360 on: March 10, 2019, 04:10:22 PM »
Glad you found it useful  :)

The last couple of bits have been made and attached to the engine. I just need to sort out the valve activation arm and put the cylinder back on the cistern then I could try it on some air  :noidea:

Jo
Usus est optimum magister

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 12338
  • Hampshire, england.
Re: 1802 Bell Crank Engine
« Reply #361 on: March 12, 2019, 01:06:05 PM »
What a parliva   :ShakeHead: The arms for the valves are awkward to fit and I had to file out yet more out of the bird beak to get it to turn over without rubbing.

I reviewed Anthony's instructions to find his description of how to set the timing which suggests that the crankshaft should be a movable fit on the end of the flywheel shaft - Yes the engine can move it  :Doh: Then he suggests leaving the top cover off the steam chest so you can see the port opening and closing  :headscratch: I opted for the work out the mid position of the valve and mark the flywheel with a bit of post-it, rotate the engine and mark the same position on the other side.

At this point it was obvious that these two marks were not 180 degrees out so a bit of position fiddling was required to even things out.

After an initial run:


The flywheel moved on the crank  :facepalm: So I now need to work out how to disassemble it, re-time it and do some shaft/arm pinning then I think this engine needs a dark corner with some friendly spiders in which to store it

Jo

 

Usus est optimum magister

Offline Jasonb

  • Full Member
  • *****
  • Posts: 6440
  • Surrey, UK
Re: 1802 Bell Crank Engine
« Reply #362 on: March 12, 2019, 01:13:22 PM »
Coming on, any reason for running it with the bearing caps off?

Think it needs an outing at the weekend before being put away

Offline Bluechip

  • Full Member
  • ****
  • Posts: 782
  • Derbyshire
Re: 1802 Bell Crank Engine
« Reply #363 on: March 12, 2019, 08:27:34 PM »
I'm rather impressed ...  :ThumbsUp:

Some what more animated than the usual err .... 'things'  :headscratch:

Very nice indeed.  :ThumbsUp:

I want two ..  ;D

Dave  ( Off to kip and bemoan snotty conk ...  :'(   )

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 12338
  • Hampshire, england.
Re: 1802 Bell Crank Engine
« Reply #364 on: March 13, 2019, 07:41:10 AM »
Thanks Dave it is a very odd engine to watch running. Look after yourself and get rid of that cold/Flu.

Maybe now I will be allowed another set of Castings  :thinking:

Jo
Usus est optimum magister

Offline Jasonb

  • Full Member
  • *****
  • Posts: 6440
  • Surrey, UK
Re: 1802 Bell Crank Engine
« Reply #365 on: March 13, 2019, 08:07:23 AM »
What about that Blued steel, did you get that when you picked up the BR2 castings so the No1 can be finished and then there is that Wall in the background :LittleDevil:

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 12338
  • Hampshire, england.
Re: 1802 Bell Crank Engine
« Reply #366 on: March 13, 2019, 10:38:50 AM »
Its just like being married  :ShakeHead:
Usus est optimum magister

Offline Roger B

  • Global Moderator
  • Full Member
  • *****
  • Posts: 3854
  • Switzerland
Re: 1802 Bell Crank Engine
« Reply #367 on: March 13, 2019, 10:52:20 AM »
Finally there  :)  :) It's certainly an interesting motion  :ThumbsUp:  :ThumbsUp: I was also going to ask about the wall  :stir:  :wine1:
Best regards

Roger

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 12338
  • Hampshire, england.
Re: 1802 Bell Crank Engine
« Reply #368 on: March 13, 2019, 12:02:11 PM »
I was also going to ask about the wall  :stir:  :wine1:

Mine are painted it makes the workshop brighter :)

Jo
Usus est optimum magister

Offline MJM460

  • Full Member
  • ****
  • Posts: 828
  • Melbourne, Australia
Re: 1802 Bell Crank Engine
« Reply #369 on: March 14, 2019, 11:11:01 AM »
Hi Jo, a fascinating action that makes this engine quite different from the standard crank and con rod.

Far to good for the spiders.  Even though the distance prevents me from coming to see it, I do hope you will have it on display at the shows you attend.

Reading back to the beginning, I can see the difficult construction with the cylinder in particular.  I really admire your persistence and ability to get it historically accurate.  I think I would have elected a simplified construction and just kept true to the external appearance.

It would be interesting to see how it would run on steam, in particular how the condenser and water/air pump works in this size.

MJM460
The more I learn, the more I find that I still have to learn!

Offline Craig DeShong

  • Full Member
  • ****
  • Posts: 441
  • Raleigh,NC. USA
    • Lauson small engines
Re: 1802 Bell Crank Engine
« Reply #370 on: March 17, 2019, 06:22:44 PM »
FAR too impressive to just become a spider habitat.  Looks very interesting to me.
Craig

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 12338
  • Hampshire, england.
Re: 1802 Bell Crank Engine
« Reply #371 on: March 17, 2019, 06:44:07 PM »
Thanks Guys.

I took it to a model engineering meeting yesterday and it got a lot of interest  :)

I have handed it over to Surus to find somewhere to keep it but I didn't get a set of engine castings in exchange :(

Jo
Usus est optimum magister