Author Topic: My Latest, a Jr. Ringmaster (Read 5244 times)

badbill · « **on:** July 31, 2016, 12:17:54 PM »

My newest build of the planes I wanted as a youth but never had. This one is a Jr. Ringmaster from the PDK kit. It was excellent quality, and a very fun build. Powered by a MK 1 Tee Dee .15. Monokote on the wing, Lusterkote spray on the fuse, aluminum and missle red. Should be fun to fly, I think it will have enough power :-)

Mike Griffin · « **Reply #1 on:** July 31, 2016, 12:36:34 PM »

Good work Bill.

Mike

Fredvon4 · « **Reply #2 on:** July 31, 2016, 12:48:20 PM »

Well done and great looking RM...I like it BadBill!

have fun keeping that baby under control with 4 or less second laps

Motorman · « **Reply #3 on:** July 31, 2016, 07:30:03 PM »

NEED VIDEO OF THAT FLYING!!

MM

Russell Shaffer · « **Reply #4 on:** July 31, 2016, 07:37:46 PM »

It sure does look nice. And, yes, I think the power will be OK. Ringmaster combat?

pat king · « **Reply #5 on:** July 31, 2016, 09:39:45 PM »

Nice airplane! It should be a rocket ship with the TD 15.

Pat

Brett Buck · « **Reply #6 on:** July 31, 2016, 10:34:34 PM »

Quote from: badbill on July 31, 2016, 12:17:54 PM

My newest build of the planes I wanted as a youth but never had. This one is a Jr. Ringmaster from the PDK kit. It was excellent quality, and a very fun build. Powered by a MK 1 Tee Dee .15. Monokote on the wing, Lusterkote spray on the fuse, aluminum and missle red. Should be fun to fly, I think it will have enough power :-)

My first "big" airplane was a Ringmaster Jr. - with a Supertigre G20/23! Absolute bomb, more than 80 mph.

Brett

Guy B Jr · « **Reply #7 on:** July 31, 2016, 10:48:40 PM »

Hi Bill,
What pitch is that prop? You might want to use low pitch on that engine with that light a plane. Looks great.

badbill · « **Reply #8 on:** August 01, 2016, 06:51:33 AM »

Quote from: Guy B Jr on July 31, 2016, 10:48:40 PM

Hi Bill,
What pitch is that prop? You might want to use low pitch on that engine with that light a plane. Looks great.

It's an APC 8/4. Engine will be kept rich, since it is ball/socket and not a MKII with a wrist pin.

Motorman · « **Reply #9 on:** August 01, 2016, 09:44:33 AM »

Let me know if you ever need that ball joint re-set. I have a special hammer for that.

If you put a piece of fuel tubing over the needle threads it will help seal. You could eliminate the spring clicker and put tubing over the whole thing.

MM

badbill · « **Reply #10 on:** August 01, 2016, 10:36:40 AM »

Quote from: Motorman on August 01, 2016, 09:44:33 AM

Let me know if you ever need that ball joint re-set. I have a special hammer for that.
If you put a piece of fuel tubing over the needle threads it will help seal. You could eliminate the spring clicker and put tubing over the whole thing.
MM

Already did the break in on it and it runs very well. If I have trouble with the settings I will do that, thanks!

Allan Perret · « **Reply #11 on:** September 27, 2016, 03:58:25 PM »

Great looking Junior. Did you ever fly it ?

badbill · « **Reply #12 on:** September 27, 2016, 06:57:00 PM »

Quote from: Allan Perret on September 27, 2016, 03:58:25 PM

Great looking Junior. Did you ever fly it ?

Yes, it has two flights now and does real well. Still needs some adjustments, less tail weight and less elevator throw. Quite fast!

Tim Wescott · « **Reply #13 on:** September 27, 2016, 07:15:08 PM »

I don't know why I didn't look the first time around -- the clear on the wings looks very good.

Allan Perret · « **Reply #14 on:** September 27, 2016, 07:51:42 PM »

Quote from: badbill on September 27, 2016, 06:57:00 PM

Yes, it has two flights now and does real well. Still needs some adjustments, less tail weight and less elevator throw. Quite fast!

Maybe try some longer lines.

Chris McMillin · « **Reply #15 on:** September 28, 2016, 11:43:00 AM »

I thought an .09 would be sufficient!
Chris...

badbill · « **Reply #16 on:** September 28, 2016, 01:11:27 PM »

Quote from: Chris McMillin on September 28, 2016, 11:43:00 AM

I thought an .09 would be sufficient!
Chris...

I think the ideal motor would be an OS .10. I just wanted the same motor on mine the neighbor kid had on his back in 1969. And it really isn't that overpowered, I like fast and I am flying it on .015 52' lines.

Steve Helmick · « **Reply #17 on:** September 28, 2016, 05:53:50 PM »

It's really pretty...and the structure is the way they should have done it in the first place. Good job, Bad Bill!

I'd look at APC's list and see if they don't have an 8-3, and order some up. Then too, I'd consider longer .012" lines. But I'm old and don't have good reflexes (still!).

Steve

badbill · « **Reply #18 on:** September 28, 2016, 07:15:04 PM »

It's turning just short of 15k on the 8x4 Steve😎 Let's keep this motor in one piece...!

Steve Helmick · « **Reply #19 on:** September 28, 2016, 07:50:33 PM »

Well, then how about a 9-3? Remember that you can re-pitch APC's, as well as carbon and wooden propellers!

Steve

Scott Richlen · « **Reply #20 on:** September 30, 2016, 07:29:15 AM »

Beautiful job!

I built one in Junior High and put a Cox Sportsman 15 (with rear venturi) on it. What a mean engine! Always was biting me. And then I guess it was nose heavy as it's loops always ended up plowing into the ground. Back then we built what came in the box and if it flew, it flew. Balancing? What's that?

Randy Cuberly · « **Reply #21 on:** September 30, 2016, 01:18:05 PM »

I had a Ringmaster Jr in 1955 or 56 with an OK Cub .14 on it. Just right for 52 ft lines. I would actually fly the entire stunt pattern.

I actually was a Combat flier at the time and built the Jr just to learn the stunt pattern. Good choice!

Randy Cuberly

John Rist · « **Reply #22 on:** September 30, 2016, 07:05:00 PM »

Be sure to fly it this weekend for the Ringmaster Fly-A-Thon

wwwarbird · « **Reply #23 on:** September 30, 2016, 08:50:21 PM »

That thing's gotta be a screamer!

Looks great too, brings back memories of the Li'l Jumpin' Bean I had many years ago with a Missile Mist fueled Tee Dee .051.

paw080 · « **Reply #24 on:** October 01, 2016, 01:20:24 AM »

Hi, The Ring Jr has seen a lot of different power plants used by many different modelers through the years.

My first Ring Jr was built when they first came out(1954??). I powered it with a Cub .099; it flew every thing

I could do then, insides, outsides, horizontal, vertical and overhead eights and wingovers. I don't remember

the line sizes, probably 42' X .008"s. In the late 1980s I built another one from a kit and remembering that

It flew really well with a Cub .099(power equal to a good Cox reed valve .049) I powered it with an AM 1.0cc

diesel. It could easily fly a stunt pattern, first on 1/2A Combat lines(35' X .012"). then later on, I went to

44' X .008" stranded lines. I built three more Jrs, one with an extended wing giving 260sq"s and two very

modified for the Paw .08cc(.049cu") plain bearing and single bearing engines. The last Ring Jr weighs only

7.2ozs with engine, 1/2oz fuel tank and Cox grey 6 X 4 prop. This last one flys the pattern very well and turns

very sharp corners. It also performs overhead maneuvers very well.

I've been sidetracked from building another Ring Jr, but with the Paw .80 cc or Paw 1.0cc diesels, I would boost

the wing area to 240sq"s. I don't think my models are real Ring jrs anymore, but I did keep the wing construction,

wing area and tail moments the same as the original design. I'll post some pics later, whenever I figure out how to

do it.

Tony

Steve Lotz · « **Reply #25 on:** October 01, 2016, 04:18:18 AM »

It should be noted that Pat King's Jr. Rings use a much better(and fatter) airfoil so they might be "draggier" than the original. I would think they could use a higher powered engine.

Steve

paw080 · « **Reply #26 on:** October 01, 2016, 12:03:55 PM »

Quote from: Steve Lotz on October 01, 2016, 04:18:18 AM

It should be noted that Pat King's Jr. Rings use a much better(and fatter) airfoil so they might be "draggier" than the original. I would think they could use a higher powered engine.

Steve

Yes Steve, I've built so many stock and modified Ring Jrs, I could see that Pat Kings design was no longer

a Ring Jr. The Pat King design does have a better airfoil, especially useful if the model will have a higher

wing loading than my 7oz modified Jrs. If I'm allowed to reveal an old attitude; I think I really never

followed up with a larger wing area Ring Jr(to accommodate the Paw 1/2A and A diesel engines), because

I thought it would be easier to build an 8/12 oz Wee Duper Zilch and have a much better flying model

than the Ringmaster Jr design. Yes, I used the same Cub .099 to power a WDZ in 1954.

Oh well; "These are the dry thoughts of a dry brain" (TS Elliot).

Tony

Steve Lotz · « **Reply #27 on:** October 01, 2016, 01:20:47 PM »

Wee Dupers look nice. Like a downsized Zilch X. I should build one someday. (thread drift)