Author Topic: Rebuilding an unknown 4 stroke single.  (Read 9462 times)

Offline HobbyNut

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Rebuilding an unknown 4 stroke single.
« on: June 19, 2014, 11:26:04 PM »
I have this old single 10cc IC engine that I traded for a Taipan 2.5CC Diesel about 30 yrs ago at least. It has been sitting in my tool chest with a bunch of other engines for that long. I figure now that I am semi retired, that I could mess with it and see if I can make it into something.
I am also drawing up the parts that I am remaking or modifying, and I will try and post them too.
I have the engine posted elsewhere under engines, but to keep this thread on subject I will post them again.
PatO
I started out with nothing, I still have most of it left.

Offline HobbyNut

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Re: Rebuilding an unknown 4 stroke single.
« Reply #1 on: June 19, 2014, 11:49:25 PM »
First mod is going to be milling the remains of the mounting lugs off the crank case, and making up new mounting angle plates that go to below the crank case. They will be bolted to the sides.
PatO
I started out with nothing, I still have most of it left.

Offline Art K

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Re: Rebuilding an unknown 4 stroke single.
« Reply #2 on: June 20, 2014, 12:56:07 AM »
Pat,
Can you tell us more about this thing? Was this some sort of old control line airplane engine? What is the bore and stroke? It does appear to be cast aluminum and the cylinder with a cast iron liner. This sounds like a fun project. I'll be following along. I am editing this now after reading your other post ( should have read them in reverse order) to find you are trying to find that out yourself.
Art
« Last Edit: June 20, 2014, 01:09:18 AM by Art K »
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline HobbyNut

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Re: Rebuilding an unknown 4 stroke single.
« Reply #3 on: June 21, 2014, 04:59:56 PM »
Well I started on it yesterday.
I set the crank case in the indexing head , and milled the remains of the broken lug off, rotated it 180d and milled the other side likewise.
I thought that I might clean up the top cyl. mount face as well so I did that and noticed that the cyl. mounting bore was off center by about .040".
I set the boring head up, and rebored it to a larger dia. but now on center.
PatO
I started out with nothing, I still have most of it left.

Offline HobbyNut

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Re: Rebuilding an unknown 4 stroke single.
« Reply #4 on: June 22, 2014, 05:39:23 AM »
Cut 2 pieces of .125" Alum angle x 1.5" long, drill and tap a few holes and it now has new feet.
PatO
I started out with nothing, I still have most of it left.

Offline HobbyNut

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Re: Rebuilding an unknown 4 stroke single.
« Reply #5 on: June 22, 2014, 05:40:33 AM »
New lathe now promised for July 2nd.  :Mad:
Cant do too much more without it.
PatO
I started out with nothing, I still have most of it left.

Online Jo

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Re: Rebuilding an unknown 4 stroke single.
« Reply #6 on: June 22, 2014, 07:46:47 AM »
That's will be nearly two months without a lathe  :o

Keeping my fingers crossed for you that there are no more delays  :)

Jo
Usus est optimum magister

Offline Ian S C

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Re: Rebuilding an unknown 4 stroke single.
« Reply #7 on: June 22, 2014, 12:04:52 PM »
I wouldn't worry too much about the cylinder mount being off centre, some engines are designed that way, seem to remember the term is desaxed, it occurred in some motorbike engines.   
      Had a bit of a look on Google, desaxed engine, came up with quite a few sites on there, one bloke thought it sounded a bit like what he had done to his cat a week ago.  Over all, interesting. :happyreader:       Ian S C
« Last Edit: June 22, 2014, 01:04:23 PM by Ian S C »

Online sco

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Re: Rebuilding an unknown 4 stroke single.
« Reply #8 on: June 22, 2014, 12:51:35 PM »
Desaxe is quite common in car engines - Honda use it as do Volkswagen in their VR engines.

Simon.
Ars longa, vita brevis.

Offline HobbyNut

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Re: Rebuilding an unknown 4 stroke single.
« Reply #9 on: June 22, 2014, 03:18:57 PM »
That's will be nearly two months without a lathe  :o

Keeping my fingers crossed for you that there are no more delays  :)

Jo
Yes Jo, it is way too long.
Quote
Desaxe is quite common in car engines - Honda use it as do Volkswagen in their VR engines.

Simon.
Well Simon I have de desaxed mine now :Lol:
PatO
I started out with nothing, I still have most of it left.

Online Stuart

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Re: Rebuilding an unknown 4 stroke single.
« Reply #10 on: June 22, 2014, 05:21:46 PM »
when I got my last lathe the wait was 14 months  :Mad: :Mad:

looking forward to the reengineering project

Stuart
My aim is for a accurate part with a good finish

Online Jo

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Re: Rebuilding an unknown 4 stroke single.
« Reply #11 on: June 22, 2014, 05:56:09 PM »
That wasn't a Myford was it  :stir:

I gave in trying to buy a connoisseur from them as after 9 months of chasing they still could not tell me how much they wanted to charge me, let alone a delivery date :ShakeHead: When you have talked yourself into spending 10K the least these manufacturers/dealers can do is help you spend your money.

Jo
Usus est optimum magister

Online Stuart

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Re: Rebuilding an unknown 4 stroke single.
« Reply #12 on: June 22, 2014, 07:19:57 PM »
Now Jo what ever made you think a thing like  that  :stickpoke:

It is regret that I must reply in the affirmative manner

The only good thing is they gave me twice what I paid them for the trade in and honoured the deal, that's what you get for supporting your local business , a long wait

I thought I was done with those after I had done my apprenticeship many many years ago , along with left handed spanners

PS I have found a good source for shop rags old underpants (washed of course ) but  that may not be a useful tip for you  :ShakeHead:

Hope the hair dryer race was a good one

Stuart
My aim is for a accurate part with a good finish

Offline HobbyNut

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Re: Rebuilding an unknown 4 stroke single.
« Reply #13 on: June 23, 2014, 05:38:42 AM »
The thing that irks me the most is that when I went in and bought and paid a substantial deposit, for the 2 machines, they were on the floor. I asked that they hold them because I was moving. A week or so later they phoned and said" bad news, we just sold your lathe" but there is another due in a few weeks! That was a month ago. :Mad:
PatO
I started out with nothing, I still have most of it left.

Offline HobbyNut

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Re: Rebuilding an unknown 4 stroke single.
« Reply #14 on: June 23, 2014, 05:42:25 AM »
Stuart, I intend to use the crank, cam, piston and rod from the existing. As can be seen the head needs to be replaced, as does the cylinder outer aluminum. I was thinking of a cast iron cylinder and head, all from barstock. Anyone have any thoughts on that?
PatO
I started out with nothing, I still have most of it left.