1/6 scale P&W R1830

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Thank you Greg. I have to add that it did scare me a couple of times during turning.

"Billy G"
 
Yes, I'm sure. Thinking about the huge form tool and impeller blades made me cringe.
 
I still need to bore the fan to 12mm. I also need to face the spigot off the back end. This requires holding the fan with the fins in. A few minutes at the grinding wheel and an old file produced a form tool for the radius of the fins to ride on. It's too late in the game to damage them.

"Billy G"

fod1 (700 x 394).jpg
 
Now to ream that bore to finish size and this is a done deal. The undercut section on the bottom is for a fibre washer to run on.

"Billy G"

dd 001 (700 x 394).jpg


dd 002 (700 x 394).jpg
 
OK -- Grandkids have left. I neede to work on the intake plumbing at this stage. A new tubing bender was needed because of the tight inside radius (8mm). Cerro-Bend will be used to fill the tubes for this step.

"Billy G"

tbb (700 x 394).jpg


tbb001 (700 x 394).jpg


tbd (700 x 394).jpg
 
Gonna be a boring day. LOL 14 cylinders to get to where the silver one is in the second picture. It's going to be a looooong day.

"Billy G"

cyl 002 (700 x 394).jpg


cyl 001 (700 x 394).jpg
 
Nice tube bender Bill, I'll be watching!

Your absolutely right ,14 of those in Chrome Moly is not going to happen fast. Carbide drills or just keep sharpening?

Dave
 
Material is 4140. It's been slow goin drilling those 15 holes. Heat build up is a major problem. Started with 3/8, then 1/2 then 3/4 and bored to .865. It took a few hours, around 20 I guess. It wasn't easy keeping that finish either. LOL Now they are going to have the ODs done and then lastly the fins. Fins will be a challenge, they are .3mm thick spaced .6mm apart. Pitch or movement of the tool for each of the 16 fins is .9mm. This is tight quarters. LOL

I also found this site for painless conversion from metric to english. Lust plug in the number.


http://www.worldwidemetric.com/measurements.html

"Billy G" ;D

BS3 (700 x 394).jpg


cyl 001 (700 x 394).jpg


BIDD (700 x 394).jpg
 
Great work Bill, you can obviously focus on the individual tasks and not be put off by the whole picture :-*
Thanks for the link to the conversion calc should come in handy, imperial lathe and mics metric mill dtis :wall:

Cheers
Terry
 
I knew this was gonna take some time but-- this is 1 hour and 16 minutes work at the blank stage. 13 more to go. It's fun though and this is how I relax. That's odd, relaxing under pressure. Works for me. ;D

"Billy G" ;)

1bd (700 x 394).jpg
 
First one was done with the arbor in the 3 jaw. Great results. The next 3 were done with the ER40 set up. Super results. No run out to speak of. This is #5 in the set up. Will continue tomorrow. Concrete floor is too much for these old feet. LOL Notice I'm cutting with HSS not carbide. The finish is as good as it gets, just have to run a little faster.

"Billy G"

bn5 (700 x 394).jpg
 
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