Author Topic: Lane and Bodley 400hp Corliss  (Read 35537 times)

Online sco

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Re: Lane and Bodley 400hp Corliss
« Reply #270 on: January 13, 2019, 04:34:38 PM »
Dennis,

Thanks for your kind comments, I've found the castings to be excellent quality with no hard spots and minimal porosity so no compliants from me on that score.  Some of the smaller ones would probably benefit with some additional stock but there again maybe they should just be better off made from barstock.  Today I started the valve dashpots - fully intented to use the castings but although they would have been easy to hold there had been some core shift which would have made cleaning up the smaller diameter difficult so again I went with making from barstock - all part of the challenge ;-)

Simon.
Ars longa, vita brevis.

Online sco

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Re: Lane and Bodley 400hp Corliss
« Reply #271 on: January 24, 2019, 09:23:45 PM »
Been working on the valve dashpots for the last few days, the drawings call for a cylinder made from a supplied casting and a piston made from steel.  Decided that the cylinder would be easier as a bar-stock fabrication and so made the piston from a chunk of cast iron instead.  Put a bit of extra detail into the top of the piston to match the full size engine.

Simon.
Ars longa, vita brevis.

Online sco

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Re: Lane and Bodley 400hp Corliss
« Reply #272 on: January 24, 2019, 09:25:18 PM »
Few more pictures;
Ars longa, vita brevis.

Offline Ramon

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Re: Lane and Bodley 400hp Corliss
« Reply #273 on: January 24, 2019, 11:07:16 PM »
Nice addition Simon  :ThumbsUp: - keep it coming.

Nothing to report on mine and a 'side track' coming on too but it will be swarf producing  ;)

Regards - Tug
"I ain't here for the long time but I am here for a good time"
(a very apt phrase - thanks to a well meaning MEM friend)

Offline Dave Otto

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Re: Lane and Bodley 400hp Corliss
« Reply #274 on: January 25, 2019, 01:17:05 AM »
Very nice work Simon.

Dave

Offline Dennis

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Re: Lane and Bodley 400hp Corliss
« Reply #275 on: January 29, 2019, 03:07:35 PM »
Hi Simon,
I like the way you made the dashpots from bar stock.  They look really nice.  In all of the kits we developed I tried to use as many castings as possible but those dashpot castings were a pain in the neck for both me and the foundryman.  I whish I had used your design from the beginning.  Thanks for your postings, I have been out of the business for two years now but still learning.
Dennis

Online sco

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Re: Lane and Bodley 400hp Corliss
« Reply #276 on: February 02, 2019, 03:38:37 PM »
Thanks Dennis.

I put a hex on the end of the damper clevis using the dividing head and then back in the lathe to add a bit more shape and tap M3.  The dampers were then assembled - they have a light spring and are probably over damped at the moment particularly with a drop of oil - I can always add an air bleed later to reduce the damping if necessary.

There are quite a few linkage rods in the engine with a lefthand thread at one end and righthand thread at the other, I've never cut a lefthand thread so this was a new experience.  As usual it takes longer to setup for this operation than to actually complete it what with setting up the gear train for the pitch, getting the tool square and the brain ready to flick the saddle traverse lever in the opposite direction to normal.  I ordered an M3 LH die to clean up the thread but the supplier sent a righthand version instead but once I got the depth of thread right they came out ok without needing the die.

Next op will be to cut a righthand M3 thread on the other end of the link rod which should be straight forward and only need the brain part re-setting up :-)

Simon.
Ars longa, vita brevis.

Online sco

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Re: Lane and Bodley 400hp Corliss
« Reply #277 on: February 03, 2019, 09:03:19 PM »
Cut a righthand thread on the other end of the link rods and also added a hex section in the middle.  Need to make four more similar rods with opposite hand threads at either end for the valve gear so will bash them out whilst the lathe is setup.

Simon.
Ars longa, vita brevis.

Offline Dennis

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Re: Lane and Bodley 400hp Corliss
« Reply #278 on: February 03, 2019, 09:05:44 PM »
Nice looking parts Simon.  and yes there are a lot of little rods with left and right hand threads.  Glad to hear you are getting through it ok. 

When  you get your engine running, be cautious of oil in the dampers.  Originally, our prototype model did not have the damper springs.  When we ran the engine, we found the oil in the damper added too much drag and prevented the valve release from working properly.  The engine ran better without oil on the dampers but the dampers were not heavy enough to make the valve release work consistently. I added the springs to the bottom of the dampers to make sure they operate consistently.  A very light spring will be sufficient and the air blead you mentioned would be an excellent idea.  The original engine has an adjustable air bleed valve on each damper.

Looking forward to seeing your engine finished.
Dennis

Offline fumopuc

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Re: Lane and Bodley 400hp Corliss
« Reply #279 on: February 04, 2019, 07:27:27 PM »
Hi Simon, I am following along quitely.
Kind Regards
Achim