Sows ear

[Artie]

Pete, the engine is looking bloody great mate! As fer 'is 'Ighness up 'ere in Bathurst way.... thats what I have come to expect from Tel. Bloody luverly bloke who knows his stuff... and mighty generous to go with it....

Pretty much spot on Jim (BC1), good onya Tel....

Keep up the work Pete, you've had me glued to the thread for a bit now....

Cheers Rob

 

[metalmad]

Hi Rob
Im very glad you like it mate it makes life so much better to meet and talk with people with the same interests.
Like I said to Brian "there is no turning back now" ;D
Pete

 

[metalmad]

Hi all
had a go at the shaft for the cam this arvo but ended up braking my only correct tap off inside it so I finished roughing the first flywheel to size (no spokes yet )
And that bl@@dy modem better come soon or im going to have a new Telco!!
Pete

 

[Lakc]

I guess your "modem in a box" is working
Starting to look like a real engine there.

 

[metalmad]

Hi jeff
I'm hoping to start the second flywheel today,and I recon ill cut a piece of wood so it can sit flat
( hanging of the table edge is only gunna take me so far ;D )
I might even start on my spokes if i get time cos that big ugly flywheel hides so much,and boy this thing is gunna be heavy.
Pete

 

[metalmad]

an update to the modem sarga
my telco rang me today to ask if id got it yet !!
after a few choice words from yours truly, he said he would check.
He rang back 20 Min's later to tell me its been lost again and would be reordered (for the third time) to be delivered no later then Monday .
got a little bit done today,remade the shaft and roughed out the other flywheel.
Pete

 

[metalmad]

Hi guys
not a lot done today, but a little even so.
went all the way over the other side of Brisbane to get some bits (like my itsy bitsy bearing and the 8-32 nuts nobody keeps )
I did do a trial fit up of the gears with no cam to see how they fit
and I was gratified to see how smooth they are
Pete

View attachment SANY1415.JPG

 

[metalmad]

Hi all
Bord out the piston this arvo and made a complete stuff up of it
when I get some more material I will have to remake it (It must have moved and the pin is not at 90 degrees to the 3/8 slot for the con rod).
Til then it will serve as a dummy.
I thought I was having it too easy til now and my lovely con rod I was so happy with will have to be relieved a bit more cos with the piston installed, the rod fowls the liner as it comes round.
Pete

 

[Maryak]

Pete,

Nice going especially under the circumstances. :bow: I don't know which is easier but maybe you could notch the bottom end of the cylinder at 1800 and keep your very nice conrod.

Best Regards
Bob

 

[bearcar1]

Uh, you have me wondering now Pete, if I may have a clearance issue on the rod that I made. Personally. I think that Bob has the right idea about cutting a notch for clearance in the liner. Maybe even a semi circular scallop. How much interference are you running into? It would be a shame to go backwards at this point in such a fine build

BC1
Jim

 

[metalmad]

Hi bob
I probably will relive the liner a bit today and for the life of me I don't know what happend with that 3/8 slot.I used a 4 flute 1/2 end mill first to give an idea of boundaries then the 3/8 down to one inch at the edges and just connected the holes ,then I brought out the .5 to the .625 or whatever it was .

Hi Jim
I don't think its much mate cos from the position of the Crank its all downhill from there,But I did Think to myself how "healthy" my conrod looked ;D
I doubt it will be a real problem that a little bit of milling will not fix,it did not show up till now cos without the piston installed the rod had more movement. The piston is almost usable as the pin hole in relation to the piston and rod is correct and the slot is only just out of line.
In any case, it will serve to get the fit right of the moving parts and I think while I'm taking off material, ill give a bit more clearance under the crank on the base.

 

[metalmad]

Just a little update today
I put a bevel on the liner but there was still a problem, so I took off a little from both sides of the rod.
I now must report I have a compression leak ;D
I would imagine not having a head gasket may be the most likely culprit. but anyway the only other little thing I did was mill the tops off those 8/32 nuts I bought the other day,but I don't like the look of them much (too big)so maybe at a latter date, ill get some small metric nuts and drill and tap them


View attachment bevel.JPG

View attachment smaller rod.JPG

 

[metalmad]

Hi all
I got a few hours in today.
I had a play with the cam,and once Id overcome my fear of the unknown I enjoyed myself quite a bit ;D
I have never done a cam like this before ,I think on my Webster I did it by hand,but once I got started I found out it was easy :big:

View attachment cam3.JPG

 

[metalmad]

The pics I could not fit in before

View attachment cam5.JPG

View attachment cam6.JPG

 

[tel]

Looks like making it with a tail and pushing it in to the stupidly oversize bore in the large gear worked Ok Thm:

 

[metalmad]

Hi Tel
just made the cam standard mate,with a brass bush for the gear
( when in doubt go standard ;D )
So now I will have to pin the cam and gear but I'm still hearing little voices, saying PRESS IT PETE
PRESS IT ,does anybody else hear the voices too? ???
who knows, maybe I might drill out them both out and PRESS in a bushing or I could just chicken out again LOL
Pete

 

[metalmad]

Hi guys
had a play with the spokes today with mixed results
I took a bite out the first wheel I did and in order to remove it I made the outside land smaller.
I have not decided weather to just make the second one to match or replace the first wheel.I'm a little bit concerned they may be to light for the motor to miss!!
Pete

View attachment flyhole1.JPG

View attachment flyhole2.JPG

 

[tel]

Don't worry too much about it Pete, just use it as the offside wheel and be more careful with the one that carries the governor gear!

 

[metalmad]

Hi Tel
im gunna have to chew over it overnight I guess,but to my mind the flywheel outer rim has to be the same or it will look silly
anyway im gunna hit the sack,got a bit of a headache tonight
Pete

 

[Brian Rupnow]

That thing about pinning the cam gear to the side of the cam seems very fishy, but it actually works just fine.---Brian