tiny four cycle

[Krown Kustoms]

Spedy,
I drew most of the plans before I started, some of the pieces I am waiting till I get to them so I can find out how much room I have.
They are on my drawing board, after I finish I will put them in cad I have autocad and alibre, I'm not sure which one I will use, I believe I can import to both.
but yes I will post a copy of them when they are complete.
I am using a 7x12 lathe and a Grizzly 12 inch swing mini mill.
I am using probably the smallest of both so I'm sure your equipment will be fine.

 

[RobWilson]

Very interesting post KK Thm:
Regards Rob

 

[Krown Kustoms]

Thanks rob,
right now im grilling chicken, tending to my daughter and working on my .5" spark plug.
The day just keeps getting better.

 

[Krown Kustoms]

I have almost completed the head less the valves.
I couldnt wait so I mounted it to see what it would look like.
My design has a few flaws and of course need to be corrected.
The valves are going to ve very close to the cylinder wall so I will have to move them in the drawing.
By moving the valves I have to change the rocker arm mount, by changing that ...?... :wall: :shrug: :redface2:
here are some pics as of now, I had to turn down the 2-56 screws to fit the counter sink.

 

[Krown Kustoms]

Its been a few days (weeks?) but the progress is just as slow, I hav made the valve guides three times and finally got a pair I like.
I have been dealing with a lot of personal issues so I havent had much garage time.
I'm sure everone knows what thats like.
here is a pic of the first one pressed in.
hopefully I will get the valves done this weekend and to start on the cam and housing.
I did get a chance to rebuild my lathe and it runs like new again.

 

[Krown Kustoms]

I got a little more done today.
finished the valve guides and pressed them in.
also made a spark plug to scale, not sure if it will be "hot" enough
I couldnt resist adding details even though they wont be seen.
-B-

 

[Bill Mc]

Hi Krown Kustoms - I really like the tiny spark plug that you made. Could you please elaborate a little more on it's construction and perhaps a photo of it's different parts. Thanks - Billmc

 

[Krown Kustoms]

Hey Bill

I based my plug on a build I found here.
http://www.homemodelenginemachinist.com/index.php?topic=5653.msg59768#msg59768
I have never posted a link so I hope that works.

Mine is made from .200 aluminum hex rod, white delrin and the electrode is a cut down .050 drill bit shaft.
I havent tested it yet, I havent finished my ignition coil.
-B-

 

[vlmarshall]

Ah, wow, that little sparkplug is interesting. That alone makes me want to build an IC engine.

 

[Krown Kustoms]

After about a foot of .25 steel rod I came up with two .600 x .130 valves.

That will be all tonight, my eyes burn and my patients has been tested.

I have made some small parts but this engine has alot of really small parts, its definitely pushing my limits.
-B-

 

[zeeprogrammer]

Maybe we shouldn't use coins for scale...or anything for scale.
Geesh those are small.
Nice work.
Spark plugs...aren't they like diamonds to a girlfriend/wife/partner?

I didn't think much about them until I saw people making them on this forum.
Guess that makes me a....

 

[Krown Kustoms]

well... I showed my proud achievement of a .060 turned shaft on the valve without bending, and my tiny spark plug to my wife and she said well what is it and those are nice dear.

I wish she liked spark plugs instead of diamonds, I would still have my 500hp corvette.
-B-

 

[eskimobob]

Those valves are tiny :bow:
Boy oh boy, I have sooooo much to learn :-[

 

[cobra428]

Krown Kustoms,
Nice work :bow:
And I thought I was nuts building The Whittle V8
Tony

http://www.homemodelenginemachinist.com/index.php?topic=5232.0

 

[Krown Kustoms]

Yes, nuts is one of the names I get allot when I show someone the drawings.
sometimes I feel nuts when Im working that close to the chuck, like when I had to face the valves. The shafts were almost too small for the chuck to hold them.

Cobra, I would have thought the Whittle had even smaller valves.
I have been following your build, that is a good looking engine.

I am still not sure how well it will run, it is my first ic.
I have another started but it got put away for a while. It is a inline twin 2 stroke.

-B-

 

[cobra428]

Krown Kustoms,
You know, now that I think of it, 2 valves have to fit in a .406 dia cyl. plus 1/4-32 glow plug. The head drawing don't look bad either but thats about 4:1 The drawing has the valve at about 10:1 scale. I haven't been paying attention scratch.gif
But then again, I'm so poor, I can't even pay attention :big:

Tony

PS getting back to work on the V8 tonight and I'll have a good look at the head and valves

 

[crankshafter]

KK
Oh man I love your tiny small valves. Question: are you going to use Hall sensor ignition for that engine. Well when I think it over.
I will not be surprised if you come up with some tiny small breaker-point Thm: ;D

CS

 

[GailInNM]

KK,
Small stuff is fun, isn't it. Looks good.

Tony,
0.406 = 0.460 ? You are probably grinning saying "I made you look !!" ;D ;D
Gail in NM

 

[cobra428]

Gail,
Sorry for making you look! I was looking over the plans last night trying to figure out what material in the box of bits was going to be the cyl's crank, cam...... I was picking up numbers in my head and OOPPS! I'm at work now and can't look (I should keep a plan copy here).

Tony

 

[Krown Kustoms]

CS A friend has a bunch of Model A's (sorry, anyone who restores them calls them an A Model), I took a look at the points and I think I will scale down one and see how it works. I made a coil and it has a pretty good bite to it
I just hope the spark plug will hold up I may need to build one with a bigger gap.

I also know someone who built a Wall Water Witch and used the points from an A Model. You can move the points to adjust the timing and works well as a throttle.

-B-
p.s. is music wire the same thing as piano wire? There is a local music shop I was going to check. ???