JB Atoms

Well done so far, lots of patience klippy, great thread.

That explains it. That one was brought to a dead stop screaming it's head off spinning a heavy prop.
BTW have a look at this www.google.co.uk/search?q=Making+con+rods+for+model engines
THE MEN is long winded but good reading

While I have to make one new collar I decided to make 2.



The cutter is ground to 55^o. I have finish cut the material to the correct outside diameter of the thread, the undercuts are smaller than the smallest diameter of the thread, this is so I can release the thread feed in fresh air and then wind the cutter back. I have also given myself plenty of room from the chuck, since this machine has a minimum speed of 160rpm.



Drilling the collars 5mm, this is the nominal thickness of the new conrod, after drilling and reaming the conrod hole I will elongate the aperture in the collar, much the same as they do on the Mills.



This is what 49 years of storage does.

Worrisit Tony?

??? It's the piston from the incomplete engine.

I thought it was a bit of round bar-stock! Shows what I know! [badass]

Thought it might be Oooooooer. Should still work ok cause the fit is tight any way . Shouldn't it ?

That's funny no edit box showing.I was going to say those marks would be where the ports were wouldn't they ?
Now the edit box shows up Grrr. BTW it was 1958/9 when it broke So around 60 yrs storage.

one tenor wrote: Thought it might be Oooooooer. Should still work ok cause the fit is tight any way . Shouldn't it ?

The corrosion is of no consequence since it doesn't extend all the way to the crown. It's just 'of interest'
There might be a bit of a hold up I'm not feeling too well just lately, I have an infection, and I'm deep into my 2017 Tax!

Sorry to hear that .Get well soon 2017 Taxi ????? do you mean taxes lol

Get well soonest Tony, He said TAX ! OT

So he did Sorry Tony I'll have to get better specs :ohmy:

2017 Tax finished and sent to the Tax man, now he has to decide whether I'm lying or not!
There's been a bit of a hold up, Mary decided she wanted to move one of my work areas, when I was putting a new light up, part of the ceiling came down! Owner built in 1970 (not me). All fixed now, the good news is that when moving the tables and stuff. the errant Needle valve assembly came to light!
Monthly shopping tomorrow so nothing happens until Friday.

Yippeeeee!

Hi Tony if it works read the comments Re the two engines in this thread by Valic000
It could explain a lot about the pair you struggled with
Regards John