Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
November-2017
MauricioB's

"Cox Tee Dee .010"



PAST WINNERS
Speed Contest 2018
CEF Traveling Engine

Gallery


Win This Engine!
The Traveling Prop
World of Aviation

Too bad development didn't continue...

View previous topic View next topic Go down

Too bad development didn't continue...

Post  batjac on Sat Jan 09, 2016 9:07 pm

I was looking for info on the Sterling Mini-Fledgling over on RCG, and found the thread announcing CEF back in 2011.  I never saw that thread, and would assume many here have not either.  The interesting thing from that thread is the description of a Cox concept project about an in-line engine.  I've never seen this, and thought anyone who's never seen these drawings might be interested.





The Zombie Mark
avatar
batjac
Diamond Member
Diamond Member

Posts : 1447
Join date : 2013-05-22
Age : 54
Location : Portland, OR, USA

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  ARUP on Sat Jan 09, 2016 9:38 pm

Very interesting!
avatar
ARUP
Gold Member
Gold Member

I Support My Forum

Posts : 179
Join date : 2015-09-13
Location : Kentucky

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  RknRusty on Sun Jan 10, 2016 12:03 am

It is interesting. I'm pretty sure that thread got me here, as that was my only hobby hangout at that time.
Rusty

_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!


My Hot Rock & Blues Playlist
avatar
RknRusty
Moderator

Posts : 10437
Join date : 2011-08-10
Age : 61
Location : South Carolina, USA

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  fredvon4 on Sun Jan 10, 2016 8:00 am

Well I see a few problems.... electric pre heat of glow element? I do not see the path for exhaust out of the engine
avatar
fredvon4
Diamond Member
Diamond Member

Trusted Seller
Posts : 2215
Join date : 2011-08-26
Age : 62
Location : Lampasas Texas

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  getback on Sun Jan 10, 2016 8:18 am

That's pretty wild the construction is based on todays rotor valve pressure washers , I didn't read it all I will have to check it later my necks killing me this morning Mad getback
avatar
getback
Top Poster
Top Poster

Posts : 4272
Join date : 2013-01-18
Age : 60
Location : julian, n.c.

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  ARUP on Sun Jan 10, 2016 9:19 am

Fred, there is some porting at base of the piston slugs' cylinders to act as intakes and exhaust. The big cylinder container all the slugs rotates around to get to the needed ports. The drawing shows a couple of circles that are exhaust ports(?) The side view dimensional drawing shows the other stuff. I still don't quite get the glow plug portion, though.

Hope your neck gets better! I had to really lean forward to look at these drawings for this engine.
avatar
ARUP
Gold Member
Gold Member

I Support My Forum

Posts : 179
Join date : 2015-09-13
Location : Kentucky

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  roddie on Sun Jan 10, 2016 9:36 am

fredvon4 wrote:Well I see a few problems.... electric pre heat of glow element?  I do not see the path for exhaust out of the engine

I see what you mean Fred. Wouldn't you think that those two elements would have been included with taking the design that far? Compression-ignition would be interesting.. but still; there's no place for an exhaust port without causing temperature/lubrication problems. It would somehow need to involve the crank.. which is generally well out of the way of combustion heat.
avatar
roddie
Top Poster
Top Poster

Posts : 5462
Join date : 2013-07-17
Age : 57
Location : N. Smithfield, Rhode Island

View user profile http://www.stilburnin.com

Back to top Go down

Re: Too bad development didn't continue...

Post  pkrankow on Sun Jan 10, 2016 10:28 am

https://www.youtube.com/watch?v=-UBAukXPD-0
https://www.youtube.com/watch?v=tZmd7k33JWE

Looks like these using a cam. Notice the exhaust is in the same position, the rotation opens and closes the ports. The article states it is a 4-stroke engine.

Phil
avatar
pkrankow
Diamond Member
Diamond Member

Posts : 2914
Join date : 2012-10-02
Location : Ohio

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  fredvon4 on Sun Jan 10, 2016 11:04 am

OK I can see how the side view does not show the exhaust port opening that looks to be in the other view of the rotating rear intake piece

I believe there is also a compression ratio where you don't need to pre heat the glow wire for the catalytic induced combustion but it needs to be a very durable element as changing that part as often as we do a cox glow head would be a pain

It would be cool if one of those very talented engine builders would further develop and test this design...I too have seen other inline piston designs that seem to work
avatar
fredvon4
Diamond Member
Diamond Member

Trusted Seller
Posts : 2215
Join date : 2011-08-26
Age : 62
Location : Lampasas Texas

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  OVERLORD on Sun Jan 10, 2016 11:11 am

cooling?
avatar
OVERLORD
Platinum Member
Platinum Member

Posts : 1156
Join date : 2013-03-19
Age : 51
Location : Normandy, France

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  OVERLORD on Sun Jan 10, 2016 11:20 am

Duke engine based on a similar principle but with revolving pistons, non rotating head with spark plugs and water cooling

https://www.youtube.com/watch?v=c19kn3drdFU
avatar
OVERLORD
Platinum Member
Platinum Member

Posts : 1156
Join date : 2013-03-19
Age : 51
Location : Normandy, France

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  ARUP on Sun Jan 10, 2016 11:22 am

Yeah... the cooling looks a bit feeble. The fins would be better 90 degrees the other way, i.e., oriented along the length of engine.
avatar
ARUP
Gold Member
Gold Member

I Support My Forum

Posts : 179
Join date : 2015-09-13
Location : Kentucky

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  fredvon4 on Sun Jan 10, 2016 11:52 am

I did a few "gamers" computer builds back a few years ago, and got real interested in CPU cooling up to and including cryogenics

Part of what I learned had to do with the coefficient of different metals, thermal dissipation, air flow, and a few other things like thermal conductive pastes/glues etc...

Fins are a simple way to increase surface area, and yes airflow over or through them is a consideration; but also machining ease/costs is also...if you look at the screw machine cost schedule, you can see they (as was typical for COX mfg) were trying to bring it in at a very low cost to produce. Radial fins are easy...longitudinal fins would require a lot more effort and not all that much gain in thermal release

I think the engineering is sound the more I look at this and suspect the real reason we did not see this design was timing...Cox was loosing market share about then as was Fox and in the mid 70s we were seeing the EPA and OSHA having a big impact on USA manufacturers (impact to this project...nil... impact to Cox as a whole....huge!)


Last edited by fredvon4 on Sun Jan 10, 2016 11:54 am; edited 1 time in total (Reason for editing : spelting errores)
avatar
fredvon4
Diamond Member
Diamond Member

Trusted Seller
Posts : 2215
Join date : 2011-08-26
Age : 62
Location : Lampasas Texas

View user profile

Back to top Go down

Re: Too bad development didn't continue...

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum