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TOPIC: Living the Past

Living the Past 18 Jul 2020 08:59 #32784

Phil Randall Offline Platinum Boarder Posts: 417 Thank you received: 50	Meanwhile I have tried to get a nice drawing of the double acting two stroke diesel. Two much detail so I have done a line drawing. Double acting was also done on four strokes but with less power to weight ratio. Do you want more stories? Phil R. Attachments: ...001.pdf (761KB)
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Living the Past 18 Jul 2020 09:56 #32785

Ken R Offline Platinum Boarder RETIRED? Posts: 2961 Thank you received: 137	Yes please Phil, love the stories
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Living the Past 18 Jul 2020 11:10 #32786

Tim D Online Administrator Posts: 2567 Thank you received: 272	Phil what was the Idle, cruising and top RPM of those engines? So double acting Four stroke, was there intake and exhaust valves off to the side where the pistons meet?
	Last Edit: 18 Jul 2020 11:12 by Tim D. The administrator has disabled public write access.

Living the Past 18 Jul 2020 11:42 #32787

Chappa Online Platinum Boarder Posts: 441 Thank you received: 39	Wouldn’t you almost call that a 1 stroke for the centre piston anyway did the Conroe run through the middle of the bottom piston? With rings on it? can you post pictures on here using your phone or would I need to blow the dust off the old PC? All this talk about blowers I wanted to post a pic of one that I bought yesterday.
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Living the Past 18 Jul 2020 17:04 #32788

Phil Randall
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Great to get so many questions, keep them coming.
Lowest speed about 30 rpm.
Fastest speed about 100 rpm on opposed piston. 140 rpm on single piston types.
Double acting four strokes only had a single piston. Generally a top and bottom camshaft actuating valves in the cylinder head and in the bottom of the liner. Sort of like an upturned cylinder head with a hole in the middle where the piston rod went through.
The piston rod went through the lower piston and was sealed with a scraper box with internal rings as shown on my sketch.
And a bit of reading.
Phil R.

Attachments:

...8AM.JPG (2,570KB)

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Living the Past 18 Jul 2020 17:16 #32789

Phil Randall Offline Platinum Boarder Posts: 417 Thank you received: 50	The promised reading bit! Phil R. Attachments: ...008.doc (31KB)
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Living the Past 18 Jul 2020 22:09 #32790

Tim D Online Administrator Posts: 2567 Thank you received: 272	So next question, the crankshaft is connected directly to the propeller, to go forward or backward the engine is run in the direction required, that's my understanding??? So I can understand that with a two stroke but a four stroke? I enjoyed Mongolia, thank you Phil.
	Last Edit: 18 Jul 2020 22:10 by Tim D. The administrator has disabled public write access.

Living the Past 18 Jul 2020 22:19 #32791

Tim D
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Chappa wrote:

can you post pictures on here using your phone or would I need to blow the dust off the old PC?
All this talk about blowers I wanted to post a pic of one that I bought yesterday.

There is two ways Dave.

You need to upload them to a photo hosting site and them link them to here, I use https://imgur.com/
You need to set up an account there if you want to go that way.

Or use that Browse button just below where you write your post and upload it in to your post, we them click on the attachments at the bottom of that post. That's how Phil has been uploading his info.

Last Edit: 18 Jul 2020 22:21 by Tim D.

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Living the Past 19 Jul 2020 06:45 #32792

Chappa
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Tim D wrote:

So next question, the crankshaft is connected directly to the propeller, to go forward or backward the engine is run in the direction required, that's my understanding???

So I can understand that with a two stroke but a four stroke?

I enjoyed Mongolia, thank you Phil.

That is a bloody good question Tim I know these days they use pods that rotate 360 degrees
I can’t imagine shutting these big fellas down and restarting the in reverse looking forward to Phil’s reply on this one
Phil can you also give us an explanation on how you start these big engines?

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Living the Past 19 Jul 2020 06:50 #32793

Chappa Online Platinum Boarder Posts: 441 Thank you received: 39	Check this blower I bought the other day it weighs 505kg dry and takes 120hp to drive it Attachments: ...43.jpeg (3,258KB)
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