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Search: Posts Made By: Recycled Flyer
Showing results 1 to 16 of 16
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Forum: Everything Diesel
05-27-2014, 04:42 PM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

I can see that his one is going to involve my...

I can see that his one is going to involve my kids crayons and a bottle of red wine as my head hurts already!

But I kinda get it now, thanks.

As I said, happy to be proven wrong.
Forum: Everything Diesel
05-27-2014, 03:37 PM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

The shaping of the combustion chamber. The...

The shaping of the combustion chamber.

The contention here is "Does a flat topped piston and flat head result in more useable force than its sloped and angled cousin?"

You seem to agree that...
Forum: Everything Diesel
05-27-2014, 02:35 PM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

Ok, what I failed to emphasis last post was the...

Ok, what I failed to emphasis last post was the agreement that pressure only acts at 90º to its container, so there is no vertical, no horizontal component, there is no 'top' force - it simply pushes...
Forum: Everything Diesel
05-27-2014, 04:22 AM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

Hi Dave, I think that you get...

Hi Dave,
I think that you get what I am trying to say but how does one resolve 'pounds per square inch multiplied by more square inches' and say that it equals the same amount of...
Forum: Everything Diesel
05-26-2014, 02:53 PM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

I can see that shaping the combustion chamber...

I can see that shaping the combustion chamber away from the pistons line of travel (degrees above or below it being flat) should result in the charge forces following a 90 degree from angle of that...
Forum: Everything Diesel
05-22-2014, 02:24 PM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

[QUOTE=qazimoto;11809206] It should be...

[QUOTE=qazimoto;11809206]

It should be pointed out that the Oliver style ports are highly directional. Some people mightn't realise this. I had a conversation with Andy Kerr quite a while ago...
Forum: Everything Diesel
05-22-2014, 02:10 PM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

Could that be a Moki?

Could that be a Moki?
Forum: Everything Diesel
05-21-2014, 03:00 AM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

I would imagine that Steve Rothwell would have...

I would imagine that Steve Rothwell would have left no stone unturned with his R250 either.
Forum: Everything Diesel
05-21-2014, 01:05 AM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

I am sure that the Team Race boys have all over...

I am sure that the Team Race boys have all over this and back again - its just hard to get any one other than Grant Potter (when he is fired up enough) to comment about any of this kind of stuff.
...
Forum: Everything Diesel
05-20-2014, 09:55 PM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

Thanks for the reply Chris, I thought that PAW...

Thanks for the reply Chris, I thought that PAW dropped the conical piston around the time the squish band heads were introduced and weren't they a prelude to muffled operation?

Something else with...
Forum: Everything Diesel
05-20-2014, 06:27 PM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

Possibly, or simply just having a slight even...

Possibly, or simply just having a slight even thickness dome will be more resistant to pressure.

My old Yamaha RD 400 had slightly domed pistons -- never really pondered why other than aluminum...
Forum: Everything Diesel
05-20-2014, 04:21 PM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

My guess is that it has more to do with the crown...

My guess is that it has more to do with the crown not collapsing under the regime of Pylon racing.
Forum: Everything Diesel
05-20-2014, 02:41 AM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

Hi Steve, forgot to include the R 250 and 320...

Hi Steve,
forgot to include the R 250 and 320 but similarly Dave mentioned the same to me about piston tops years ago.

It just seems that if you have to have a contoured crown to direct gas flow...
Forum: Everything Diesel
05-19-2014, 11:39 PM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

Hi Chris, what modern high...

Hi Chris,
what modern high performance 360 degree port model diesel offers a conical top piston?
Oliver, Parra, the Taipan 2.5's (and variants) or PAW don't because they know its...
Forum: Everything Diesel
05-19-2014, 02:42 PM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

The issue as I see it is that the piston crown is...

The issue as I see it is that the piston crown is the hottest place in any IC engine so it makes sense to minimise that area - part of the reason that all modern engines have a flat crown.

By...
Forum: Everything Diesel
05-18-2014, 03:00 AM
Replies: 91
Views: 13,757
Posted By Recycled Flyer

Baffled top piston diesels.

I have always considered that the baffle on any piston top will be the hottest place in the entire combustion chamber and when used in a model diesel will cause localised pre- ignition well before...
Showing results 1 to 16 of 16


 
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