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Author Topic: SIPP!! (or is it?)  (Read 374 times)

tenniV11

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Re: SIPP!! (or is it?)
« Reply #15 on: March 20, 2021, 03:10:51 pm »
Quote from: Quickj on March 20, 2021, 02:55:59 pm
Thanks Again for the catalog scans Gil.

So today I continued on with trying to get this thing to run.  No matter what, it seemed like air was going every where but to the cylinder.  I had pretty much disassembled, checked everything, reassembled, adjusted, hooked up air, tested, remade parts etc.  The one thing I didn't remove was the cylinder lagging.  So today I did.

(Attachment Link)

I don't think you should be able to see the piston going back and forth through the 3 big holes in the wall of the cylinder where who ever made this thing bored it out to big!  And I don't know how I missed this big of a hole when I inspected the bore.  I guess I only looked at the bottom and side where the port was cored in.

So I have a cylinder sleeve to make and fit.  Right now the piston mic's out at 1.255.  The cylinder bore is 1.262.  I don't think I am capable of making a sleeve that is .012 to bring the cylinder down to exactly 1.250 (.006" walls).  So I am thinking I will drop the cylinder bore down to 1.125" with a sleeve, and turn the piston down to match. 

I do not have any cast iron that is big enough to make the cylinder from.  I do have some 12L14 leaded steel that I can use, or some brass that I could use.  Do you think either of those would be suitable, or should I buy a chunk of 1.5" cast Iron DuraBar? 

This one is going on the back burner for a while.

Jim in Minnesota


This is really bad luck - nobody really expects that
I already made a sleeve for a cylinder - best material is bronze
and it is easy to turn and hone - you can use 603 Loctite to seat it.
undersized 1/10 mm should work. I think you can get a bronze bar/pipe in the US.
Arnold

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classixs

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Re: SIPP!! (or is it?)
« Reply #16 on: March 20, 2021, 04:23:20 pm »
Bummer! :o 

Since it only will be used occasionally (i assume?), i´d simply make a brass sleeve, and even a brass piston as well if the original is easily removed.
That way you´d swiftly have a running engine, that will last you for decades, and on top won´t rust internally, if a bit of moisture is present in there.
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Cheers
Jan
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tenniV11

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Re: SIPP!! (or is it?)
« Reply #17 on: March 20, 2021, 05:22:38 pm »
Quote from: classixs on March 20, 2021, 04:23:20 pm
Bummer! :o

Since it only will be used occasionally (i assume?), i´d simply make a brass sleeve, and even a brass piston as well if the original is easily removed.
That way you´d swiftly have a running engine, that will last you for decades, and on top won´t rust internally, if a bit of moisture is present in there.

Brass will work with compressed air - but not with Steam - Piston jam
will occur. Sleeve should be made from Bronze and Piston from cast iron.
Arnold
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blopoulos

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Re: SIPP!! (or is it?)
« Reply #18 on: March 23, 2021, 04:48:58 pm »
Gil, could I get a DF copy of the catalogue(s) as well?

thanks
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Scorpion2nz

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Re: SIPP!! (or is it?)
« Reply #19 on: March 24, 2021, 02:55:25 pm »
Are you requireing leaded bronze LG2
I have more than enough
1.5 inch OD
.75 ID
cost would be shipping from New Zealand
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Quickj

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Re: SIPP!! (or is it?)
« Reply #20 on: March 24, 2021, 03:45:21 pm »
Quote from: Scorpion2nz on March 24, 2021, 02:55:25 pm
Are you requireing leaded bronze LG2
I have more than enough
1.5 inch OD
.75 ID
cost would be shipping from New Zealand

wow,  What a great offer.  I would love to get a piece about 4 inches (100 mm) long.
You can e-mail me at the email in my profile and we can work out the details.

Thanks!

Jim in Minnesota
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Scorpion2nz

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Re: SIPP!! (or is it?)
« Reply #21 on: March 25, 2021, 11:05:34 am »
Quote from: Quickj on March 24, 2021, 03:45:21 pm
Quote from: Scorpion2nz on March 24, 2021, 02:55:25 pm
Are you requireing leaded bronze LG2
I have more than enough
1.5 inch OD
.75 ID
cost would be shipping from New Zealand

wow,  What a great offer.  I would love to get a piece about 4 inches (100 mm) long.
You can e-mail me at the email in my profile and we can work out the details.

Thanks!

Jim in Minnesota

I think I sent an email last night .
Let me know if it is lost in space
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KNO3

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Re: SIPP!! (or is it?)
« Reply #22 on: March 25, 2021, 11:42:33 am »
When I started reading this topic i looked at the first few pictures, and thought "what a nice old engine with beautiful castings". Reading further I was shocked to see the disaster made of that cylinder casting. Were these engines offered as kits and maybe this one was started by a very incompetent person? Or was it an unfortunate attempt at repair?
Anyway, it will be very interesting to watch how you redo this cylinder. I also think a sleeve is the easiest option. You would also need to machine the port face and the intake and exhaust ports, but it looks like there is enough of the casting left to do that.
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RedRyder

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Re: SIPP!! (or is it?)
« Reply #23 on: April 29, 2021, 04:12:45 pm »
Cast iron may be the best material for a piston and sleeve.

I believe the correct bore for your engine is 1.125"

I'll check my drawings.    EDIT:  Yes, the catalog says the bore is 1.125"

Gil
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