Diesel 4 strokes
06-26-2003, 06:14 PM
#2
Join Date: Sep 2002
Location: Smyrna,
TN
Posts: 413
Likes: 0
Received 0 Likes
on
0 Posts
4 stroke diesel?
We at Davis Diesel feel there are enough parts in a four stroke and we prefer to leave the poor things alone.
Definition of a 4 stroke engine: for 3 strokes it beats itself to death and for 1 stroke it produces power. My, what an efficient system.
Definition of a 4 stroke engine: for 3 strokes it beats itself to death and for 1 stroke it produces power. My, what an efficient system.
06-26-2003, 07:34 PM
#3
Junior Member
Thread Starter
Join Date: Jun 2003
Location: Bellingham, WA
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Diesel 4 strokes
Ya but they sure produce alot of power on that one stroke and they suuuuure dooo souuuund gooood!
Thats why I prefer them, the sound mostly.
It would be nice to swing even larger props with them too! and idle lower, and use less fuel...
I bet if u made a conversion for say saito 100s..and it worked.. people might just have a new toy to spend money on..
Just an idea.. I guess my question is:
CAN it work?
Thats why I prefer them, the sound mostly.
It would be nice to swing even larger props with them too! and idle lower, and use less fuel...
I bet if u made a conversion for say saito 100s..and it worked.. people might just have a new toy to spend money on..
Just an idea.. I guess my question is:
CAN it work?
06-26-2003, 07:43 PM
#4
Join Date: Sep 2002
Location: Smyrna,
TN
Posts: 413
Likes: 0
Received 0 Likes
on
0 Posts
4 stroke diesel
I never said it wouldn't work. As far as sound preference I think that is a personal thing. But I do agree that it is more pleasant to listen to a the sound of a pulsing whoopee cushion than to a screaming me me. By the way a diesel is quieter than a glow 2 or 4 stroke. For those that are offended that we thing there noisy we make very quiet mufflers for both 2 and 4 stroke glow. check out our website. davis diesel.
07-02-2003, 01:06 AM
#5
My Feedback: (2)
Join Date: Feb 2002
Location: Hervey Bay Queensland, AUSTRALIA
Posts: 2,995
Likes: 0
Received 0 Likes
on
0 Posts
4 stroke diesels
Niel Tidey, designer of "Laser" 4 stroke engines in the UK, made diesel versions of his old 75 four stroke (now updated to the 80 size engine) for some of his customers.
They were primarily sold in Germany, in an effort to help modellers there meet ever more restrictive noise regulations.
An e-mail to Neil may ascertain whether the engines are still available. I believe they were only ever made to order. I expect they would be more expensive than the equivalent glow Laser.
A link is available at:
www.laserengines.com
regards
fiery
They were primarily sold in Germany, in an effort to help modellers there meet ever more restrictive noise regulations.
An e-mail to Neil may ascertain whether the engines are still available. I believe they were only ever made to order. I expect they would be more expensive than the equivalent glow Laser.
A link is available at:
www.laserengines.com
regards
fiery
01-26-2004, 08:37 AM
#6
Junior Member
Join Date: Jan 2003
Location: private, PUERTO RICO (USA)
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
RE: 4 stroke diesels
I e-mailed Neil and was told that they are not presently selling nor thinking about selling a 4 stroke diesel. He was kind enough to let me know that it would be difficult for a lay person to do the conversion. The engine needs to be long stroke which would need a new head and cams. Lou Furco ells the gadjet to convert a 4 troke to diesel but you need to use a special fuel which may or may not contain kerosene. What's the energy content of such fuel is unknown to me. I may try it just for the heck of it.
02-07-2004, 09:04 AM
#7
RE: 4 stroke diesels
Hi all, i am new here. 
I have 2 4 stroke diesel, where i has converted to diesel, it is not difficult.
First engine are a Os FS40 surpass and second engine are a Magnum 52FS AR.
Here are my pic, but not of Magnum[8D]
Long stroke are not important, it works well with short stroke, the cylinder liner must be lower to same height as piston (removed material from crankcase to lower cylinder liner.), At Os FS40 cams are same as before(but not at newer version of Os fs 40), removed a parts of material in cylinderhead to increase compresion ratio. Used casket to adjust height between liner and head to prevent knock valves. Maked a extra contrapiston in extra contrapistoncylinder srewed to glowplughole. Start very easy and reliable idling and turn big propeller[8D]
Magnum cams are a bit difference from Os FS 40, removed a part of side on cam for intake valve cause valve opened early and knocked at piston. Valvelifter has plane, then i maked these plane surface to halfball, then it will not valves knockin at piston.
How to start 4 stroke dieselengine (contrapiston must be ready adjusted at test running): Turn out fuelneedle 1 tturn out, choke carburettor with finger, prime engine 3 times (turn crankshaft 3 times), rotate to compression begins then flip propeller, it will start. Adjust fuelneedle 1 turn back.
Dieselfuel: 32 percent ether, 2 percent isopropyl nitrate, 15 percent oil the balance kerosene.
Hope my english are understandful for all readers
Jens Eirik,Norway
I have 2 4 stroke diesel, where i has converted to diesel, it is not difficult.
First engine are a Os FS40 surpass and second engine are a Magnum 52FS AR.
Here are my pic, but not of Magnum[8D]
The engine needs to be long stroke which would need a new head and cams.
Magnum cams are a bit difference from Os FS 40, removed a part of side on cam for intake valve cause valve opened early and knocked at piston. Valvelifter has plane, then i maked these plane surface to halfball, then it will not valves knockin at piston.
How to start 4 stroke dieselengine (contrapiston must be ready adjusted at test running): Turn out fuelneedle 1 tturn out, choke carburettor with finger, prime engine 3 times (turn crankshaft 3 times), rotate to compression begins then flip propeller, it will start. Adjust fuelneedle 1 turn back.
Dieselfuel: 32 percent ether, 2 percent isopropyl nitrate, 15 percent oil the balance kerosene.
Hope my english are understandful for all readers
Jens Eirik,Norway
02-09-2004, 05:51 PM
#13
RE: 4 stroke diesels
My engine ran at 8-9000 rpm with 12x6. But i was afraid to lean out fuel in case not enough lubricating the engine. Because i used motor oil at sae10W40 in dieselfuel. Castor oil are expensive here in Norway. Which oil can i use in dieselfuel for 4 stroke engine? Full syntetic motorcycle oil at 20W50?
The combustion chamber are not same as in Bukh diesel or in Mercedes diesel, both engines has injector above comustion camber. I use the "lanova cell" with contrapiston.. and it is too cause to difficult to place contrapiston direct in cylinderhead. fuelmixture presses in the cell and ignite, then blow out of cell..
Lanova cell. A special combustion chamber also called energy cell, for diesel engines of high rotary speeds.
I shall send better pictures of engine parts. Here are not much carbon builds up in combustion camber and piston![X(]
The combustion chamber are not same as in Bukh diesel or in Mercedes diesel, both engines has injector above comustion camber. I use the "lanova cell" with contrapiston..
and it is too cause to difficult to place contrapiston direct in cylinderhead. fuelmixture presses in the cell and ignite, then blow out of cell..Lanova cell. A special combustion chamber also called energy cell, for diesel engines of high rotary speeds.
I shall send better pictures of engine parts. Here are not much carbon builds up in combustion camber and piston![X(]
02-09-2004, 07:58 PM
#14
RE: 4 stroke diesels
Jens very neat concept I know none of our model diesels are injected but that external chamber idea
is new to me.. years ago I worked on and installed convential diesels in fishing boats I do not
think anyone has developed tiny injection pumps and injectors but you got around it
8000 sounds pretty good since as glow we run maybe 9000 tops (at least I do) on glow
At any rate a very good sucess story
is new to me.. years ago I worked on and installed convential diesels in fishing boats I do not
think anyone has developed tiny injection pumps and injectors but you got around it
8000 sounds pretty good since as glow we run maybe 9000 tops (at least I do) on glow
At any rate a very good sucess story
02-09-2004, 09:01 PM
#15
My Feedback: (102)
Join Date: Dec 2001
Location: Colonial Beach, VA
Posts: 20,370
Likes: 0
Received 24 Likes
on
24 Posts
RE: Diesel 4 strokes
When, I was growing up on the farm in Western Pa. we had FARMALL Diesels that had Auxillary combustion chambers, a Case Tractor and a Catterpillar D2 Dozer with a PowerCell. And somebody else called theirs the EnergyCell before the battery stole that name.
02-10-2004, 12:29 AM
#16
RE: 4 stroke diesels
dieseldan: I know none of our model diesels are injected
, never dieselinjection at modeldiesel???It has been maked modeldiesel with pump and injection. [8D]
These engines has been maked in 1941 in Germany in a short period.
These pictures: Eisfeld 10 ccm, 1941
Jens Eirik
02-10-2004, 07:46 AM
#18
RE: 4 stroke diesels
jENS THIS BEYOND BELIEF<<>> LOOKS QUITE SMALL ANY IDEA OF DISPLACEMENT?? DID
IT RUN ON REG DIESEL I WOULD NOT HAVE BELIEVED THAT YOU COULD HAVE MADE AN
INJECTION SYSTEM THAT SMALL AND A ADUSTABLE PUMP VOL.?? FOR SPEED CONTROL??
BOSCH TYPE PUMP??
AJ NEEDS A VALIUM AFTER LOOKING AT THIS
MAYBE IT RAN ON A KERO/BENZENE MIX
if CONVENTIONAL POPOFF INJECTOR NEEDS VERY HIGH PRESSURES
WAS THIS A ONE OFF?? DRAWINGS HAVE TO BE SOMEWHERE
IT RUN ON REG DIESEL I WOULD NOT HAVE BELIEVED THAT YOU COULD HAVE MADE AN
INJECTION SYSTEM THAT SMALL AND A ADUSTABLE PUMP VOL.?? FOR SPEED CONTROL??
BOSCH TYPE PUMP??
AJ NEEDS A VALIUM AFTER LOOKING AT THIS
MAYBE IT RAN ON A KERO/BENZENE MIX
if CONVENTIONAL POPOFF INJECTOR NEEDS VERY HIGH PRESSURES
WAS THIS A ONE OFF?? DRAWINGS HAVE TO BE SOMEWHERE
02-10-2004, 08:29 AM
#22
RE: 4 stroke diesels
Somewheres here have the service books on bosch and CAV systems if memory correct
pop off pressure on injector better than 1000 PSI also some rotary pumps out there
rousa?? I think they work off a wobble plate pretty compact design GM v8 diesels
pop off pressure on injector better than 1000 PSI also some rotary pumps out there
rousa?? I think they work off a wobble plate pretty compact design GM v8 diesels
02-10-2004, 08:41 AM
#23
RE: 4 stroke diesels
It appears they use a cam lobe to push the follower that depresses the pump piston
the tough part would be the pop off injector there is no return line off it either
the tough part would be the pop off injector there is no return line off it either
02-10-2004, 06:07 PM
#24
RE: 4 stroke diesels
Hi, i shall not make the pump and popoff injector , because it is difficult for me.
It is very very small fuel for each injections in the modelengine + how much it can give precise quantity fuel each injection in high rpm..
To example a truck engine at 4000 rpm use 3 cubicmillimetre (0,000183 cu/in) diesel for each injections.
I am thinking if it is possible at model dieselengine with pump, maybe engine will consume 1/4 of fuel tank while model dieselengine with carburator consuming 1/2 of fueltank.
One problem, where are the lubrication of engine if it has dieselpump and popoff injector, we can not use oil in out 4 stroke crankcase to lubricate moving parts.[
]
Today i am ready (not complete) with my Magnum XL 52 fourstroke. Has converted the engine to dieselengine.
And i has mixed new 4 stroke dieselfuel, i has never runned engine with glow or methanol/oil/nitro. Only new engine, then i slaughted [>:] new unused engine and maked engine to be a dieselengine. [8D]
Engine has Lanova combustion camber with contrapiston, all works well, not much carbon cause rich fuel while break in.
Now i am breaking in the engine, it ran without problem in cold weather -1 celsius (can not fahrenheit temperature).
Dieselfuel formula: 32 % ether, 10% castoroil, 10% 20W50 full synthetic motorcycle 4 stroke motoroil, 48% diesel (not kerosene, because diesel has better lubrication perfomance). Also i has all 3 things to lubricate engine: Diesel (we use diesel to lubricate dieselpumps in our cars), castoroil, 20W50 full synthetic motorcycle 4 stroke motoroil.
It is very very small fuel for each injections in the modelengine + how much it can give precise quantity fuel each injection in high rpm..
To example a truck engine at 4000 rpm use 3 cubicmillimetre (0,000183 cu/in) diesel for each injections.
I am thinking if it is possible at model dieselengine with pump, maybe engine will consume 1/4 of fuel tank while model dieselengine with carburator consuming 1/2 of fueltank.
One problem, where are the lubrication of engine if it has dieselpump and popoff injector, we can not use oil in out 4 stroke crankcase to lubricate moving parts.[
]Today i am ready (not complete) with my Magnum XL 52 fourstroke. Has converted the engine to dieselengine.
And i has mixed new 4 stroke dieselfuel, i has never runned engine with glow or methanol/oil/nitro. Only new engine, then i slaughted [>:] new unused engine and maked engine to be a dieselengine. [8D]
Engine has Lanova combustion camber with contrapiston, all works well, not much carbon cause rich fuel while break in.
Now i am breaking in the engine, it ran without problem in cold weather -1 celsius (can not fahrenheit temperature).
Dieselfuel formula: 32 % ether, 10% castoroil, 10% 20W50 full synthetic motorcycle 4 stroke motoroil, 48% diesel (not kerosene, because diesel has better lubrication perfomance). Also i has all 3 things to lubricate engine: Diesel (we use diesel to lubricate dieselpumps in our cars), castoroil, 20W50 full synthetic motorcycle 4 stroke motoroil.
