Author Topic: A Wallaby of my own.  (Read 252120 times)

Offline steamer

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Re: A Wallaby of my own.
« Reply #600 on: October 24, 2016, 12:44:34 AM »
OK Centers are in.   I've documented my way of getting the centers in.    I hope it's self explanatory, but I'd be glad to explain.

Next, rough out the throws,

Then rough the mains

Then finish the throws,

Cross drill the throws.

Cut off blocks, and finish the mains and finish the shaft ends.

Cross drill for oil passages.

Dave


"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Roger B

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Re: A Wallaby of my own.
« Reply #601 on: October 24, 2016, 07:32:39 AM »
Glad to see you back in the workshop  :ThumbsUp:  :ThumbsUp:  :wine1:
Best regards

Roger

Offline steamer

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Re: A Wallaby of my own.
« Reply #602 on: October 24, 2016, 11:17:46 AM »
Thanks Rodger, good to be back!

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Tennessee Whiskey

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Re: A Wallaby of my own.
« Reply #603 on: October 24, 2016, 04:50:55 PM »
That's more like it, back on a roll. Now, in the words of a country song: "Don't back up, don't back down" keep the swarf coming Tatah :cheers:. I'll bet old Samantha Belle is chomping at the tool bit  8)

Cletus

Offline steamer

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Re: A Wallaby of my own.
« Reply #604 on: October 24, 2016, 05:27:49 PM »
That she is!!!!

Really looking forward to getting this done.   I have projects I want to do!!!!

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Dave Otto

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Re: A Wallaby of my own.
« Reply #605 on: October 24, 2016, 05:50:14 PM »
Hey Dave, good to see you back in the shop!

The crank shaft is looking good!


Dave

Offline steamer

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Re: A Wallaby of my own.
« Reply #606 on: October 24, 2016, 05:55:54 PM »
Hey a question for the membership.

The original plans call for "Glacier metal" for the bearings, and perhaps hardening or chrome plating the shaft.

I would rather do one of the following, or , follow a well trod and successful path that one of you good folk have already followed.

Make bearing inserts with babbit faces.      I am sure I can do that and it would work with a non hardened crank shaft obviously.

Use silver inserts like Ron did on his Offy.....might be over kill for this engine.....but I'm listening.

OR!

Just use bearing bronze, as this engine is really just to run for show and giggles and will probably outlive me doing so...
( Im leaning this way as my boat engine gets worked hard and has this combination and is as tight as the day it was made....)

OR!

( please fill in with the space provided)

What say you?
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Jo

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Re: A Wallaby of my own.
« Reply #607 on: October 24, 2016, 06:08:09 PM »
I will have plain bronze on mine  ;)

Jo


P.S. Still recovering from the shock of seeing you making bits of Wallaby again. I noticed you carefully hid the swarf so the shock wasn't too much :lolb:
Enjoyment is more important than achievement.

Offline gbritnell

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Re: A Wallaby of my own.
« Reply #608 on: October 24, 2016, 06:10:16 PM »
Hi Dave,
In most all of my engines I use bearing bronze for the plain bearing inserts and have never had any significant wear even with the splash oiled ones. Unless you were really going to stress the engine I don't think making more sophisticated bearings would be needed. Just my two cents.
gbritnell
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Offline steamer

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Re: A Wallaby of my own.
« Reply #609 on: October 24, 2016, 06:16:58 PM »
Hi Dave,
In most all of my engines I use bearing bronze for the plain bearing inserts and have never had any significant wear even with the splash oiled ones. Unless you were really going to stress the engine I don't think making more sophisticated bearings would be needed. Just my two cents.
gbritnell
I will have plain bronze on mine  ;)

Jo


P.S. Still recovering from the shock of seeing you making bits of Wallaby again. I noticed you carefully hid the swarf so the shock wasn't too much :lolb:



Done!!!!   Simplifies everything....love it.

Besides, I've seen this oil pump in action....it's prodigious!....

Oh the swarf is everywhere!!!!   My shop is a mess at the moment, but I did do this work this weekend....it felt real good to get out there and fire the mill up.    gonna make more time for me in future.....good for my outlook....


Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline steamer

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Re: A Wallaby of my own.
« Reply #610 on: October 24, 2016, 07:53:31 PM »
by the way....I wish that knee could talk.   It was built in 1957  and resided at "Buick" bench 7.     I suspect it was their tool and die shop.   It's freakin PERFECT....

Dead straight, and square....like less than anything I can measure with a tenths micrometer, and harder than woodpecker lips.

All the 3/8-16 threaded holes are clean and tight....

about 6 x 6 x 6 and about 1.5" thick.  solid steel  It's a beast.

Who ever built it...knew what they were doing!

Love that knee......

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline steamer

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Re: A Wallaby of my own.
« Reply #611 on: October 26, 2016, 03:41:55 AM »
Ordered bronze for rods, and bearings today.....bronze isn't cheap, but I'll have enough left over for the next one.

A new 3C collet came today...9/16    I'll be using it shortly.

Can't tell you how much I missed doing this.....

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Jo

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Re: A Wallaby of my own.
« Reply #612 on: October 26, 2016, 07:47:53 AM »
Ordered bronze for rods

The set of castings that have been keeping me company over dinner have cast bronze rods  :noidea:

I was planning on using HE15 for my Wallaby rods.

Jo
Enjoyment is more important than achievement.

Offline steamer

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Re: A Wallaby of my own.
« Reply #613 on: October 26, 2016, 11:38:17 AM »
Not familiar with the HE15    I'll look it up

( Ahh   2014 aluminum.   YUP   )

Using ISO 932   (SAE 660 bearing bronze) for the rods.   This is a pretty tame engine so 660 should be fine and will alleviate the need to make inserts for the rods......

And ....it's on the prints....  and the counterweights are sized for bronze rods.   

Dave
« Last Edit: October 26, 2016, 11:51:24 AM by steamer »
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Jo

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Re: A Wallaby of my own.
« Reply #614 on: October 26, 2016, 11:51:31 AM »
HE15 Ali is what I use to make the con rods for my aero engines.

Yep bronze on the drawings but the design is a few years old  ;)

Jo
Enjoyment is more important than achievement.

 

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