Notices
Everything Diesel Discuss R/C Diesel engines here.

Diesel 4 strokes

Old 06-26-2003, 05:53 PM
  #1  
Cappa
Junior Member
Thread Starter
 
Join Date: Jun 2003
Location: Bellingham, WA
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default Diesel 4 strokes

Any word on a 4-stroke diesel conversion?
Is this practical, or even a good idea at all?

~Cappa.
Old 06-26-2003, 06:14 PM
  #2  
ddd
 
Join Date: Sep 2002
Location: Smyrna, TN
Posts: 413
Likes: 0
Received 0 Likes on 0 Posts
Default 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.
Old 06-26-2003, 07:34 PM
  #3  
Cappa
Junior Member
Thread Starter
 
Join Date: Jun 2003
Location: Bellingham, WA
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default 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?
Old 06-26-2003, 07:43 PM
  #4  
ddd
 
Join Date: Sep 2002
Location: Smyrna, TN
Posts: 413
Likes: 0
Received 0 Likes on 0 Posts
Default 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.
Old 07-02-2003, 01:06 AM
  #5  
fiery
My Feedback: (2)
 
Join Date: Feb 2002
Location: Hervey Bay Queensland, AUSTRALIA
Posts: 2,994
Likes: 0
Received 0 Likes on 0 Posts
Default 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
Old 01-26-2004, 08:37 AM
  #6  
bristol
Junior Member
 
Join Date: Jan 2003
Location: private, PUERTO RICO (USA)
Posts: 23
Likes: 0
Received 0 Likes on 0 Posts
Default 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.
Old 02-07-2004, 09:04 AM
  #7  
Motorboy
 
Motorboy's Avatar
 
Join Date: Feb 2004
Location: Bergen, NORWAY
Posts: 2,232
Likes: 0
Received 1 Like on 1 Post
Default 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]

The engine needs to be long stroke which would need a new head and cams.
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
Attached Thumbnails Click image for larger version

Name:	Xv64712.jpg
Views:	96
Size:	24.7 KB
ID:	98268   Click image for larger version

Name:	Ni24574.jpg
Views:	105
Size:	41.6 KB
ID:	98269   Click image for larger version

Name:	Sx61514.jpg
Views:	96
Size:	25.9 KB
ID:	98270   Click image for larger version

Name:	Tr49882.jpg
Views:	109
Size:	14.1 KB
ID:	98271  
Old 02-07-2004, 07:47 PM
  #8  
ajcoholic
My Feedback: (10)
 
Join Date: Jun 2002
Location: Timmins, ON, CANADA
Posts: 4,236
Likes: 0
Received 2 Likes on 2 Posts
Default RE: 4 stroke diesels

Thats quite interesting! Neat!

AJC
Old 02-07-2004, 11:05 PM
  #9  
Hobbsy
My Feedback: (102)
 
Hobbsy's Avatar
 
Join Date: Dec 2001
Location: Colonial Beach, VA
Posts: 20,370
Likes: 0
Received 17 Likes on 17 Posts
Default RE: Diesel 4 strokes

Very interesting, is it tempting AJ?
Old 02-07-2004, 11:07 PM
  #10  
ajcoholic
My Feedback: (10)
 
Join Date: Jun 2002
Location: Timmins, ON, CANADA
Posts: 4,236
Likes: 0
Received 2 Likes on 2 Posts
Default RE: Diesel 4 strokes

Well, I do have an OS 48 Surpass sitting idle....

I would like to hear more!

AJC
Old 02-08-2004, 01:04 AM
  #11  
AMB
 
Join Date: Jun 2003
Location: winter park, FL
Posts: 6,748
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 4 stroke diesels

It looks like a pre combustion chamber neat. can you get us a clearer picture very novel approach for a small engine conversion what prop and rpm
Old 02-08-2004, 01:16 AM
  #12  
AMB
 
Join Date: Jun 2003
Location: winter park, FL
Posts: 6,748
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 4 stroke diesels

Actually looks like he has built a baby BUKH ( Danish marine diesel I had one) it was water cooled however
Old 02-09-2004, 05:51 PM
  #13  
Motorboy
 
Motorboy's Avatar
 
Join Date: Feb 2004
Location: Bergen, NORWAY
Posts: 2,232
Likes: 0
Received 1 Like on 1 Post
Default 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(]
Attached Thumbnails Click image for larger version

Name:	Tr51115.jpg
Views:	87
Size:	22.3 KB
ID:	99238   Click image for larger version

Name:	So43046.jpg
Views:	83
Size:	11.7 KB
ID:	99239  
Old 02-09-2004, 07:58 PM
  #14  
AMB
 
Join Date: Jun 2003
Location: winter park, FL
Posts: 6,748
Likes: 0
Received 0 Likes on 0 Posts
Default 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
Old 02-09-2004, 09:01 PM
  #15  
Hobbsy
My Feedback: (102)
 
Hobbsy's Avatar
 
Join Date: Dec 2001
Location: Colonial Beach, VA
Posts: 20,370
Likes: 0
Received 17 Likes on 17 Posts
Default 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.
Old 02-10-2004, 12:29 AM
  #16  
Motorboy
 
Motorboy's Avatar
 
Join Date: Feb 2004
Location: Bergen, NORWAY
Posts: 2,232
Likes: 0
Received 1 Like on 1 Post
Default 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
Attached Thumbnails Click image for larger version

Name:	Sq46844.jpg
Views:	90
Size:	25.9 KB
ID:	99377   Click image for larger version

Name:	Fa84696.jpg
Views:	98
Size:	28.1 KB
ID:	99378  
Old 02-10-2004, 07:24 AM
  #17  
ajcoholic
My Feedback: (10)
 
Join Date: Jun 2002
Location: Timmins, ON, CANADA
Posts: 4,236
Likes: 0
Received 2 Likes on 2 Posts
Default RE: 4 stroke diesels

You wouldnt by chance have any plans for construction of that fuel injected diesel do you????

DRooooool....

AJC
Old 02-10-2004, 07:46 AM
  #18  
AMB
 
Join Date: Jun 2003
Location: winter park, FL
Posts: 6,748
Likes: 0
Received 0 Likes on 0 Posts
Default 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
Old 02-10-2004, 07:50 AM
  #19  
AMB
 
Join Date: Jun 2003
Location: winter park, FL
Posts: 6,748
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 4 stroke diesels

jUST LOOKED AT DRAWING PUMP VOL IS ADJUSTABLE (SPPED CONTROL)
Old 02-10-2004, 07:54 AM
  #20  
AMB
 
Join Date: Jun 2003
Location: winter park, FL
Posts: 6,748
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 4 stroke diesels

oooooh<<>>> THIS IS BAD AJ FINISH YOUR CONTEST PLANE AND MY HEADS BEFORE YOU EVEN THINK A BOUT IT
Old 02-10-2004, 07:56 AM
  #21  
AMB
 
Join Date: Jun 2003
Location: winter park, FL
Posts: 6,748
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 4 stroke diesels

Jens terrific research job...
Old 02-10-2004, 08:29 AM
  #22  
AMB
 
Join Date: Jun 2003
Location: winter park, FL
Posts: 6,748
Likes: 0
Received 0 Likes on 0 Posts
Default 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
Old 02-10-2004, 08:41 AM
  #23  
AMB
 
Join Date: Jun 2003
Location: winter park, FL
Posts: 6,748
Likes: 0
Received 0 Likes on 0 Posts
Default 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
Old 02-10-2004, 06:07 PM
  #24  
Motorboy
 
Motorboy's Avatar
 
Join Date: Feb 2004
Location: Bergen, NORWAY
Posts: 2,232
Likes: 0
Received 1 Like on 1 Post
Default 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.
Attached Thumbnails Click image for larger version

Name:	Sq46770.jpg
Views:	102
Size:	120.6 KB
ID:	99577   Click image for larger version

Name:	Dy79279.jpg
Views:	103
Size:	119.8 KB
ID:	99578   Click image for larger version

Name:	Uz69242.jpg
Views:	98
Size:	120.2 KB
ID:	99579   Click image for larger version

Name:	Wp41009.jpg
Views:	119
Size:	129.7 KB
ID:	99580  
Old 02-10-2004, 06:13 PM
  #25  
Motorboy
 
Motorboy's Avatar
 
Join Date: Feb 2004
Location: Bergen, NORWAY
Posts: 2,232
Likes: 0
Received 1 Like on 1 Post
Default RE: 4 stroke diesels

More picture..[8D]

Regards Jens Eirik
Attached Thumbnails Click image for larger version

Name:	Sq46062.jpg
Views:	83
Size:	118.6 KB
ID:	99582   Click image for larger version

Name:	Wr55082.jpg
Views:	68
Size:	122.6 KB
ID:	99583   Click image for larger version

Name:	Ye84568.jpg
Views:	73
Size:	121.2 KB
ID:	99584   Click image for larger version

Name:	Ey69434.jpg
Views:	87
Size:	121.2 KB
ID:	99585  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.