Model Boat Mayhem - Forum

Please login or register.

Login with username, password and session length.
Pages: 1 2 [3] 4   Go Down

Author Topic: Four strokes  (Read 17460 times)

glennb2006

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 434
  • Location: Newcastle
Logged

cbr900

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,871
  • Mayhem is the Only Forum!
  • Location: Taree New South Wales Australia
    • Roys Hompage
Re: Four strokes
« Reply #51 on: February 12, 2007, 02:35:36 AM »

That would make a great boat motor....


Roy
Logged
I try not to be naughty but nautical

Seaspray

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,316
  • Model Boat Mayhem is the best model boat site
  • Location: East Ayrshire Scotland
Re: Four strokes
« Reply #52 on: February 12, 2007, 08:19:10 AM »

Certainly is a rare one a 60 that 10cc is it.

Looks like a wee bit of wear on the flywheel grove or is that with just not being used
Logged

BobF

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 498
  • Location: East Yorkshire
Re: Four strokes
« Reply #53 on: February 12, 2007, 12:58:47 PM »

Hi Seaspray,

I can't run it on the pond as the fly wheel and coupling have to be fitted together.

I have a lot of other projects on the go at the moment, so can't really afford the time.

There again, now you've mentioned it I may have to make up a spacer, and give it a go.

Bob
Logged

tobyker

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,315
  • Location: Scotland - West Coast
Re: Four strokes
« Reply #54 on: February 12, 2007, 03:35:28 PM »

That OS 60 with exposed rockers (very Vintage - possibly Edwardian style ) does look nice, but words like "rare" and Collector" tend to put me off. But one of these days....

That car engine went for 160!!!

Further to backplate cooling, this would probably be more appropriate for a two stroke, as it would tend to give the new charge a nice cool trip through the crankcase, retaining its density and mass and contributing to adiabatic efficiency (which I read about once in a book about supercharging!) Though if I get to modify a 4T and can't get much cooling in the top end, I'd certainly add backplate cooling.
Logged

Seaspray

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,316
  • Model Boat Mayhem is the best model boat site
  • Location: East Ayrshire Scotland
Re: Four strokes
« Reply #55 on: February 15, 2007, 03:40:02 PM »

I also looked into the 4 cylinder 4 stroke some years ago. You could buy them in kits ready to assemble or with a little lath work to complete But I was into 3.5 and 5inch model steam loco then.Only thing against 4 stroke was I felt that it would need a gearbox to increase the output revs. You then had the option of fitting a reverse gear
Logged

2772e

  • Simon
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 452
  • The Sea Shall Not Have Them
  • Location: Colchester, Essex
Re: Four strokes
« Reply #56 on: March 16, 2007, 09:14:04 PM »

Hi All,

Been talking to a chap today that specialises in making water cooled heads for any engine you want. He is a true boat man, builds and races them.

Try Paul Firmin at www.nimrifmodels.co.uk

Regards

Simon
Logged
Rubbin is Racin!

tobyker

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,315
  • Location: Scotland - West Coast
Re: Four strokes
« Reply #57 on: May 12, 2007, 10:25:27 PM »

Think I've got a SC52FS off the bmfa classifieds site. Will report progress if any, but I have other projects on too!
Logged

glennb2006

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 434
  • Location: Newcastle
Re: Four strokes
« Reply #58 on: May 13, 2007, 12:36:44 AM »

Think I've got a SC52FS off the bmfa classifieds site. Will report progress if any, but I have other projects on too!

Hi Tobyker, is that the aero engine? Guess you have a plan to cool it?

I will be interested to see photo's of how it progresses.

Glenn
Logged

dazzle

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 74
  • Location: Sarf London
Re: Four strokes OS.40fs Marine on ebay
« Reply #59 on: May 23, 2007, 11:51:45 PM »

Just Spotted an OS .40 four stroke marine engine on ebay, new in box.
If anyones interested in it.
Regards to All dazzle 
Logged
Don't Hit the Rescue Dinghy

2772e

  • Simon
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 452
  • The Sea Shall Not Have Them
  • Location: Colchester, Essex
Re: Four strokes
« Reply #60 on: May 24, 2007, 07:39:17 AM »


Have you got the listing please?

Regards

Simon
Logged
Rubbin is Racin!

HS93 (RIP)

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,949
  • I cannot spell , tough
  • Location: Rainhill UK
Logged

dazzle

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 74
  • Location: Sarf London
Re: Four strokes
« Reply #62 on: May 24, 2007, 10:50:50 AM »

Thanks Peter, I dont know how to do that listing bit yet.
dazzle  bob
Logged
Don't Hit the Rescue Dinghy

HS93 (RIP)

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,949
  • I cannot spell , tough
  • Location: Rainhill UK
Re: Four strokes
« Reply #63 on: May 24, 2007, 03:50:55 PM »

 dazzle

 Its easy .. cut and paste


  Left mouse swipe over listing at top or anything you want to transfer.. this highlites it .. Right click scroll to copy....move pointer to where you want to put it ..(it can be in another window or document)..right click ,,scroll to paste  right click on it ,,,and it should be there .. sorry if it does not make sense...  my spelling is awful , if you get stuck just PM me and ill find an article for you but this may help  Peter
Logged

tobyker

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,315
  • Location: Scotland - West Coast
Re: Four strokes
« Reply #64 on: May 24, 2007, 04:33:39 PM »

Interesting... I wonder how much it'll go for. I'm just looking at my 52FS for a while, pondering water jacket designs. It is useful to see that the jacket on the .40 is pretty small, and there's no cooling on the head or backplate either. I was surprised to read in the instructions for the .52 that there's no provision for lubrication of the internals, including valve gear and camshaft, other than a squirt of oil into a nipple under the crankcase, and "turn the engine upside down so some runs into the pushrod tunnels and up to the valve gear".  I think we might have to do something about that - I wonder if I could arrange a drip feed into the head space, and scavenging from the nipple?

Lots to think about while I work on the charter schooner.
Logged

dazzle

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 74
  • Location: Sarf London
Re: Four strokes
« Reply #65 on: May 24, 2007, 09:50:25 PM »

Thanks Peter,  that was a crystal clear explaination,
Me know now, how to.
cheers dazzle (bob)
Logged
Don't Hit the Rescue Dinghy

tobyker

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,315
  • Location: Scotland - West Coast
Re: Four strokes
« Reply #66 on: May 26, 2007, 08:19:11 PM »

Thank goodness that .40 is now more than I paid for the a/c .52. Getting some better ideas about cooling and lubricating now.  Good to have something to think about and take out of its box every so often.
Logged

dazzle

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 74
  • Location: Sarf London
Re: Four strokes
« Reply #67 on: May 27, 2007, 02:04:11 AM »

I must not reply to the better ideas about four stroking cooling  lubricating & scavenging for nipples,
or martin will ban me the same as he did  miss sinbad.
dazzle
Logged
Don't Hit the Rescue Dinghy

Martin [Admin]

  • Administrator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 19,055
  • Location: Peterborough, UK
    • Model Boat Mayhem
Re: Four strokes
« Reply #68 on: May 27, 2007, 06:56:05 AM »

;)

Martin
Logged
"This is my firm opinion, but what do I know?!"    -   Mayhem FaceBook Group!

glennb2006

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 434
  • Location: Newcastle
Re: Four strokes
« Reply #69 on: May 31, 2007, 12:30:02 AM »

Thank goodness that .40 is now more than I paid for the a/c .52. Getting some better ideas about cooling and lubricating now.  Good to have something to think about and take out of its box every so often.

Hi there,

I ran an FS40 four stroke in an aircraft for quite a while and there is no issue with top end lubrication, I would jsut do what it says in the instructions and don't worry about it too much.

Glenn
Logged

dazzle

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 74
  • Location: Sarf London
Re: Four strokes
« Reply #70 on: May 31, 2007, 12:58:29 PM »

Just a thought to use a small 6 or 12 volt fan simular to as used in pc' s
they take very little current  & should provide enough cooling.
plus it would also keep the engine in its original form.
dazzle
Logged
Don't Hit the Rescue Dinghy

edible_engine

  • Guest
Re: Four strokes
« Reply #71 on: September 06, 2007, 04:29:26 PM »

just found this its got alot of pics of engins and some 4 stroke marine engines
Logged

Martin [Admin]

  • Administrator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 19,055
  • Location: Peterborough, UK
    • Model Boat Mayhem
Re: Four strokes
« Reply #72 on: September 07, 2007, 09:34:43 AM »

.....is there a link missing edible_engine .... ???


just found this its got alot of pics of engins and some 4 stroke marine engines
Logged
"This is my firm opinion, but what do I know?!"    -   Mayhem FaceBook Group!

Martin [Admin]

  • Administrator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 19,055
  • Location: Peterborough, UK
    • Model Boat Mayhem
Re: Four strokes
« Reply #74 on: July 28, 2008, 03:03:18 PM »

Logged
"This is my firm opinion, but what do I know?!"    -   Mayhem FaceBook Group!
Pages: 1 2 [3] 4   Go Up