RE: 4 stroke diesels  
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RE: 4 stroke diesels - 2/10/2004 11:33:05 PM   
ajcoholic



Posts: 4044
Joined: 6/22/2002
From: Kirkland Lake, ON, CANADA
Status: offline 		Those pictures are much better at explaining... THANKS!

AJC


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       Post #: 26

RE: 4 stroke diesels - 2/10/2004 11:38:42 PM   
Motorboy



Posts: 1715
Joined: 2/7/2004
From: Bergen, NORWAY
Status: offline 		Thanks!! I has taken these photos today in evening (Norwegian time).
Jens Eirik

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       Post #: 27

RE: 4 stroke diesels - 2/11/2004 1:19:53 AM   
AMB


 

Posts: 3940
Joined: 6/10/2003
From: winter park, FL, USA
Status: offline 		Bottom line Jens (IT WORKS)(YOURS) ....Looking at the drawings of the german diesel (2 Strk)
the same set up would work on 4 stroke if you could run the pump off the cam ( making a
new one and a housing would be a challenge or a 1 to 2 gear off the shaft to a second cam just my thoughts
you guys are the machinists and the crankcase would hold lube oil??
I am intriqued by the injector mini pintle and spray nozzle??I wonder if any of these engines still exist
model museum maybe ,looks like you and AJ are setting some new standards in the engine
game martin

(in reply to Motorboy)
       Post #: 28

RE: 4 stroke diesels - 2/23/2004 10:39:55 PM   
Motorboy



Posts: 1715
Joined: 2/7/2004
From: Bergen, NORWAY
Status: offline 		Hi all folks, i has runned in my Magnum 52 4 stroke and leaned fuel, it ran nice and fast enough. Drink not much fuel. Has not tachometer to measure rpm. I used 12x6 propeller. Vibration are not much difference from methanol powered 4 stroke engines. After i had runned engine i checked inside of cylinderhead. there are complete combustion and much soot inside. More better photos of metalwork and after running in engine. Between cylinderhead and piston are at 1 mm, calculated from compresion ratio + extra volume from "energy cell" with contra piston. Compresion ratio are between 18:1-25:1.

Jens Eirik

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       Post #: 29

RE: Diesel 4 strokes - 2/29/2004 4:17:01 AM   
joe78586



Posts: 204
Joined: 12/29/2002
From: San Benito, TX, USA
Status: offline 		WOW 4 stroke diesel!
How doese it sound(how about a video of it). And can you post some close up picks of the contrapistoncylinder?

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       Post #: 30

RE: Diesel 4 strokes - 2/29/2004 9:40:56 AM   
fiery


 

Posts: 1012
Joined: 2/2/2002
From: Hervey Bay Queensland, AUSTRALIA
Status: offline 		This is so cool.

Jens

I have an OS 52 sitting in it's box after hundred's of flights because I am bored with it and have moved on to 1/4 scale aircraft. I would LOVE to do a conversion.

You have a business opportunity here if you have the time. Any chance of offering a conversion service?

< Message edited by fiery -- 3/1/2004 8:08:03 AM >

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       Post #: 31

RE: Diesel 4 strokes - 2/29/2004 2:07:00 PM   
AMB


 

Posts: 3940
Joined: 6/10/2003
From: winter park, FL, USA
Status: offline 		Not a bad idea have a brand new mag 52 sitting on the shelf that would
love to "go under the knife" (transplant surgery to diesel)

< Message edited by dieseldan -- 2/29/2004 9:07:44 AM >

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       Post #: 32

RE: Diesel 4 strokes - 3/2/2004 7:36:28 PM   
Motorboy



Posts: 1715
Joined: 2/7/2004
From: Bergen, NORWAY
Status: offline 		To Joe78586, sorry, i has not video of it with sound ..
Here are near photo of contra piston and "energy cell".
I has maked a better design of "energy cell" than early with 2 screws as shown in other photos of Magnum 52.

Jens Eirik

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       Post #: 33

RE: Diesel 4 strokes - 3/2/2004 10:50:29 PM   
joe78586



Posts: 204
Joined: 12/29/2002
From: San Benito, TX, USA
Status: offline 		OK I think a don't have the proper tools to make one.
How much would you charge me to make me one for an OS .26S-C car engine? It should be the same since all engine sizes use the same glowplugs right.

thanks for the pics

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       Post #: 34

RE: Diesel 4 strokes - 3/3/2004 5:46:02 AM   
Motorboy



Posts: 1715
Joined: 2/7/2004
From: Bergen, NORWAY
Status: offline 		Impossible, you must replace whole cylinderhead to increase compresion ratio with a cylinderhead maked for dieselfuel, it has contra piston inside.
My 4 stroke engine cylinder head has smaller volume after i removed material with lathe and mounted "energy cell" in cylinder head.

Jens Eirik

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       Post #: 35

RE: RE: Diesel 4 strokes - 3/3/2004 1:07:50 PM   
Hobbsy



Posts: 10836
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		Moto, I think the OS .26 Joe refers to is a fourstroke.

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RE: RE: Diesel 4 strokes - 3/3/2004 2:08:53 PM   
joe78586



Posts: 204
Joined: 12/29/2002
From: San Benito, TX, USA
Status: offline 		Yes the .26 I am referring to is a four stroke. And I can remove the head gasket and if needed I can shave the sleeve to get more compression.
This is the engine
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXPT58&P=0

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       Post #: 37

RE: RE: Diesel 4 strokes - 3/3/2004 4:59:50 PM   
Hobbsy



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Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		Joe, when I tried to run Diesel fuel in my Saito .80 as is, it had far too much compression and I couldn't run it more than half throttle. In fact at half throttle it was making dangerous noises.

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       Post #: 38

RE: RE: Diesel 4 strokes - 3/3/2004 8:23:36 PM   
Motorboy



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From: Bergen, NORWAY
Status: offline
quote:

ORIGINAL: joe78586

Yes the .26 I am referring to is a four stroke. And I can remove the head gasket and if needed I can shave the sleeve to get more compression.
This is the engine
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXPT58&P=0


Hi, first i thinked it was a 2 stroke carengine , yes..it is possible to convert your engine to dieselengine. You must remove material from cylinderhead and a part of crankcase for sleeve. It shall be about 20:1-22:1 compression ratio + volume of "energy cell", it shall be variable between 16:1-20:1 with contrapiston from low to max. It is not enough remove head casket to increase compresion. But you must have head casket to seal better..

Since your engine are a car engine, maybe you must add a bigger flywheel to run better in idle..

quote:

Joe, when I tried to run Diesel fuel in my Saito .80 as is, it had far too much compression and I couldn't run it more than half throttle. In fact at half throttle it was making dangerous noises.


Cause too high compresion where it detonates very hard in engine, better you mount the "energy cell" as shown in photo and reduce compresion. Have you measured compresion ratio at your Saito?

Jens Eirik

< Message edited by Motorboy -- 3/3/2004 3:25:35 PM >

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       Post #: 39

RE: RE: Diesel 4 strokes - 3/3/2004 10:36:09 PM   
Hobbsy



Posts: 10836
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		It is 14.4 to 1

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