Author Topic: MY TAKE ON RUDY'S RADIAL (Read 3174 times)

sid pileski · « **on:** August 25, 2021, 02:15:50 PM »

After seeing some of the recent builds on Rudy's radial, I was inspired to make one myself.
However, I wanted it to look a little more like the real thing. So I modeled it up and started adding the details to make it
look more prototypical.

Time it start making chips!

Sid

crueby · « **Reply #1 on:** August 25, 2021, 02:30:36 PM »

Love the look!!

sid pileski · « **Reply #2 on:** August 25, 2021, 03:01:52 PM »

Thanks Chris.

Yeah, his design was a little too plain. I think this will wake it up.
I don't know when I will actually start on it. Maybe a piece here and there.
I've got too many paying projects in line right now.

I've build the ubiquitous five cylinder wobbler radial too.

I see these as a build up to a "real" five or nine cylinder radial. Definitely on my bucket list in retirement.

Sid

RReid · « **Reply #3 on:** August 25, 2021, 03:30:31 PM »

Your design looks really good, Sid. The exhaust stubs are a great touch, I wish I'd thought of that!

If I had planned the touches I added to mine from the start, I too would have put the pushrod tubes at the front. Mine are a little bit hidden at the back, but it was the easier way to incorporate what was more or less an afterthought.

sid pileski · « **Reply #4 on:** August 25, 2021, 03:45:25 PM »

I also added a bunch more fasteners. Again to make it look more proto.
Going to have to be patient doing all those 2-56's!

sid pileski · « **Reply #5 on:** September 02, 2021, 04:53:05 PM »

Here is the start.
40 2-56's.
No errors!

crueby · « **Reply #6 on:** September 02, 2021, 06:01:19 PM »

Center case came out great - thats a lot of tapping!
Anyone ever try a double-acting version of an engine like this? Would need a lot of redesign. Anyway, this is looking great!

Kim · « **Reply #7 on:** September 02, 2021, 06:26:45 PM »

Excellent work! That's a lot of tapping. I believe I broke a tap off in that part when I made mine. Glad you were able to complete it with no tap breakage!

And you even did extra holes above and beyond the plans!

Kim

sid pileski · « **Reply #8 on:** September 02, 2021, 07:07:03 PM »

I used a tap guide, starting and bottoming taps and butter cut for each hole.
Also, I take the part to work and at lunch time, or when in a online meeting I'll do a couple of holes.
Basically, take my time doing each.

Sid

RReid · « **Reply #9 on:** September 03, 2021, 03:09:25 PM »

You're off to a "flying" start, Sid!

sid pileski · « **Reply #10 on:** September 07, 2021, 12:18:58 AM »

Here is the front housing.
I'll be using shielded ball bearings instead of the bushing.

RReid · « **Reply #11 on:** September 07, 2021, 01:45:43 AM »

Is that stainless?

crueby · « **Reply #12 on:** September 07, 2021, 01:55:28 AM »

Beautiful finish!

Don1966 · « **Reply #13 on:** September 07, 2021, 02:30:47 AM »

Don

sid pileski · « **Reply #14 on:** September 07, 2021, 01:37:11 PM »

Quote from: RReid on September 07, 2021, 01:45:43 AM

Is that stainless?

No, it's 6061 aluminum.
I'm debating to glass bead it (to look more like casting) or black anodize it???
Most of my other engines are black anodize.

Don, Chris- Thanks!

Sid

RReid · « **Reply #15 on:** September 07, 2021, 03:55:58 PM »

The pictures fooled me. It just didn't look very aluminumy, probably the because the finish is so fine.

sid pileski · « **Reply #16 on:** September 07, 2021, 05:14:44 PM »

Thanks!!

Sid

sid pileski · « **Reply #17 on:** September 20, 2021, 03:35:26 PM »

Update.
Made the rear distribution housing.
I'll be using o-rings to seal the air tubes to this housing.

RReid · « **Reply #18 on:** September 20, 2021, 03:44:19 PM »

Lookin' perty.

Vixen · « **Reply #19 on:** September 20, 2021, 03:55:16 PM »

Hi Sid

Thats a fine looking engine core.

Mike

crueby · « **Reply #20 on:** September 20, 2021, 04:21:39 PM »

Great!

sid pileski · « **Reply #21 on:** September 20, 2021, 05:34:23 PM »

Thanks guys.

Chris- Hope you've got a lot of popcorn, cause this build is going sloooowww.

Sid

crueby · « **Reply #22 on:** September 20, 2021, 06:19:23 PM »

Quote from: sid pileski on September 20, 2021, 05:34:23 PM

Thanks guys.

Chris- Hope you've got a lot of popcorn, cause this build is going sloooowww.

Sid

I'll send the elves out for another truckload!

sid pileski · « **Reply #23 on:** October 11, 2021, 04:55:32 PM »

Here is a progress update.
Five good cylinders. (all within .0005 of .500)
I used 12L14 material, and will probably use 6061 for the pistons.

I think next part to make will be the crank, and then move on to the master and slave rods.

crueby · « **Reply #24 on:** October 11, 2021, 06:34:29 PM »

Wow, looking great! That second shot looks like a dancer on one leg. Excellet finish on the parts too.

sid pileski · « **Reply #25 on:** October 11, 2021, 07:18:02 PM »

Thanks Chris!

Sid

Kim · « **Reply #26 on:** October 11, 2021, 07:33:23 PM »

Lovely! Your engine is really starting to take shape. I like working with that 12L14. It's good to machine

Kim

sid pileski · « **Reply #27 on:** October 11, 2021, 07:50:41 PM »

Yes, 12L14 cuts like butter.
Should hold up well enough in this application.

Sid

sid pileski · « **Reply #28 on:** November 01, 2021, 03:47:01 PM »

Here's my next instalment, the crank.
One piece, 303 stainless.
I made the aluminum crank offset fixture to turn the crank throw, after milling away most of the unwanted material.

Sid

Don1966 · « **Reply #29 on:** November 01, 2021, 07:08:43 PM »

Vey nice work……..

Don

Admiral_dk · « **Reply #30 on:** November 01, 2021, 07:15:28 PM »

Interesting idea, to use a pin to keep the throw in position

How tight / small tolerance did you have between the hole and the pin ?

sid pileski · « **Reply #31 on:** November 01, 2021, 09:07:22 PM »

Quote from: Admiral_dk on November 01, 2021, 07:15:28 PM

Interesting idea, to use a pin to keep the throw in position

How tight / small tolerance did you have between the hole and the pin ?

It was a press fit in the aluminum, and a tight slip on the crank.
In fact, when I was turning it in the lathe, I did not secure it by any other means.
I did take light cuts and the cuts are obviously always trying to push it on the dowel pin.

Sid

Craig DeShong · « **Reply #32 on:** November 01, 2021, 09:11:54 PM »

Quote from: sid pileski on November 01, 2021, 09:07:22 PM

Quote from: Admiral_dk on November 01, 2021, 07:15:28 PM
Interesting idea, to use a pin to keep the throw in position

How tight / small tolerance did you have between the hole and the pin ?

It was a press fit in the aluminum, and a tight slip on the crank.
In fact, when I was turning it in the lathe, I did not secure it by any other means.
I did take light cuts and the cuts are obviously always trying to push it on the dowel pin.

Sid

Looks great Sid, and just in time. I think I’ll steal your idea for holding the crank

when I get there with my model.

sid pileski · « **Reply #33 on:** November 06, 2021, 09:07:01 PM »

Today's update:

RReid · « **Reply #34 on:** November 07, 2021, 12:21:04 PM »

Coming along very very nicely!

sid pileski · « **Reply #35 on:** December 06, 2021, 05:22:46 PM »

Here is an update on my progress:

Making the heads.

Next, I'm going to make the air tubes to the heads. The rotary valve is done.
At this point, when the tubes are complete, it should run!

Sid

sid pileski · « **Reply #36 on:** December 14, 2021, 05:03:37 PM »

Question for those of you that have built this engine-

Did you drill the exhaust ports in the cylinders per his plans?

At this point, I have not included them.
My engine is up and running now.
I wonder if it would run any better/different with them?

It seems to run well enough on low pressure and has a nice sound to it.

Sid

RReid · « **Reply #37 on:** December 14, 2021, 05:29:14 PM »

Hi Sid. I did include the cylinder exhaust ports on my engine. After I had it running, I taped those ports off as an experiment. I noted no difference in operation, but the sound changed slightly. With the ports open the individual exhaust beats are more distinct. Closed, with all the exhaust coming out the back of the valve, they blend more, giving a slightly more muffled, smoother note. The difference is not dramatic, but is noticeable.

Looking forward to seeing your beauty shots, and hopefully a video?

sid pileski · « **Reply #38 on:** December 14, 2021, 06:02:58 PM »

Soon. Still have the rocker boxes to make and solder in place as well as the air tubes.
Need to make the faux exhaust tubes and the running stand.

Need to retire!!

Sid

Kim · « **Reply #39 on:** December 14, 2021, 06:06:12 PM »

I put the exhaust holes in, per plan. But I never did the experiment that Ron did. I assumed it just eased the exhaust path since the exhaust path out through the valve is a much longer, smaller diameter path. But clearly (according to your and Ron's experience) those holes are not required

Kim

Dreeves · « **Reply #40 on:** December 15, 2021, 02:18:58 AM »

Sid, looks great. I sure hope to see it at Cabin Fever in January

Dave

sid pileski · « **Reply #41 on:** December 15, 2021, 02:40:13 AM »

Dave- not sure I'm going.
My buddy has already bowed out.

Probably kind of late to find a hotel now??

Sid

sid pileski · « **Reply #42 on:** January 09, 2022, 10:37:33 PM »

This one is pretty much all done.

cnr6400 · « **Reply #43 on:** January 09, 2022, 10:45:51 PM »

Kim · « **Reply #44 on:** January 09, 2022, 11:42:36 PM »

Wow! Very nice! I love the color combination you chose. The black looks great with the brass!

And it runs great!

Kim

crueby · « **Reply #45 on:** January 10, 2022, 12:15:19 AM »

Looks amazing and runs terrific! Great sound too. Well done!!

sid pileski · « **Reply #46 on:** January 10, 2022, 12:23:50 AM »

Thanks all!

Was a fun project.

Got to figure out what the next project is??

Sid

RReid · « **Reply #47 on:** January 10, 2022, 12:32:23 AM »

She's a beauty, Sid! All your "modifications" are Very nicely done.

We just need to find a good Tri-motor, say a Stinson like this, to hang your's, mine, and Kim's onto...

[/img][/img]

Admiral_dk · « **Reply #48 on:** January 10, 2022, 11:32:29 AM »

What a fantastic result

- as already mentioned, the colours and paint work looks amazing, it runs and sounds really good too

Per

sid pileski · « **Reply #49 on:** January 10, 2022, 04:02:56 PM »

Quote from: Admiral_dk on January 10, 2022, 11:32:29 AM

What a fantastic result - as already mentioned, the colours and paint work looks amazing, it runs and sounds really good too

Per

Thanks!

The black is black anodized aluminum. No paint on anything.

Sid

Admiral_dk · « **Reply #50 on:** January 10, 2022, 08:24:40 PM »

Quote

The black is black anodized aluminum. No paint on anything.

Even better

I always had a thing for anodized aluminium

sid pileski · « **Reply #51 on:** January 10, 2022, 08:26:03 PM »

Much more durable!

Sid

Admiral_dk · « **Reply #52 on:** January 10, 2022, 08:29:55 PM »

I can only agree

News:

Author Topic: MY TAKE ON RUDY'S RADIAL (Read 3174 times)