Author Topic: MY TAKE ON RUDY'S RADIAL  (Read 6047 times)

Offline Admiral_dk

  • Full Member
  • *****
  • Posts: 3752
  • Søften - Denmark
Re: MY TAKE ON RUDY'S RADIAL
« Reply #30 on: November 01, 2021, 07:15:28 PM »
Interesting idea, to use a pin to keep the throw in position  :ThumbsUp:

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

Offline sid pileski

  • Full Member
  • ****
  • Posts: 162
Re: MY TAKE ON RUDY'S RADIAL
« Reply #31 on: November 01, 2021, 09:07:22 PM »
Interesting idea, to use a pin to keep the throw in position  :ThumbsUp:

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

Offline Craig DeShong

  • Full Member
  • ****
  • Posts: 1293
  • Raleigh, NC. USA
Re: MY TAKE ON RUDY'S RADIAL
« Reply #32 on: November 01, 2021, 09:11:54 PM »
Interesting idea, to use a pin to keep the throw in position  :ThumbsUp:

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  :NotWorthy: when I get there with my model.
Craig
The destination motivates us toward excellence, the journey entertains us, and along the way we meet so many interesting people.

Offline sid pileski

  • Full Member
  • ****
  • Posts: 162
Re: MY TAKE ON RUDY'S RADIAL
« Reply #33 on: November 06, 2021, 09:07:01 PM »
Today's update:



Offline RReid

  • Full Member
  • ****
  • Posts: 1668
  • Northern California
Re: MY TAKE ON RUDY'S RADIAL
« Reply #34 on: November 07, 2021, 12:21:04 PM »
Coming along very very nicely! :ThumbsUp: :popcorn:
Regards,
Ron

Offline sid pileski

  • Full Member
  • ****
  • Posts: 162
Re: MY TAKE ON RUDY'S RADIAL
« 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

Offline sid pileski

  • Full Member
  • ****
  • Posts: 162
Re: MY TAKE ON RUDY'S RADIAL
« 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

Offline RReid

  • Full Member
  • ****
  • Posts: 1668
  • Northern California
Re: MY TAKE ON RUDY'S RADIAL
« 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?

Regards,
Ron

Offline sid pileski

  • Full Member
  • ****
  • Posts: 162
Re: MY TAKE ON RUDY'S RADIAL
« 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

Online Kim

  • Global Moderator
  • Full Member
  • *****
  • Posts: 7860
  • Portland, Oregon, USA
Re: MY TAKE ON RUDY'S RADIAL
« 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

Offline Dreeves

  • Full Member
  • ****
  • Posts: 198
Re: MY TAKE ON RUDY'S RADIAL
« 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

Offline sid pileski

  • Full Member
  • ****
  • Posts: 162
Re: MY TAKE ON RUDY'S RADIAL
« 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

Offline sid pileski

  • Full Member
  • ****
  • Posts: 162
Re: MY TAKE ON RUDY'S RADIAL
« Reply #42 on: January 09, 2022, 10:37:33 PM »
This one is pretty much all done.

<a href="https://www.youtube.com/watch?v=RCHBbyUIruc" target="_blank">http://www.youtube.com/watch?v=RCHBbyUIruc</a>





Offline cnr6400

  • Full Member
  • *****
  • Posts: 2728
Re: MY TAKE ON RUDY'S RADIAL
« Reply #43 on: January 09, 2022, 10:45:51 PM »
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:
"I've cut that stock three times, and it's still too short!"

Online Kim

  • Global Moderator
  • Full Member
  • *****
  • Posts: 7860
  • Portland, Oregon, USA
Re: MY TAKE ON RUDY'S RADIAL
« 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!   :ThumbsUp:

Kim

 

SimplePortal 2.3.5 © 2008-2012, SimplePortal