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Old Dec 16, 2012, 07:36 PM
Team Compass/KBDD Team Pilot
Ah Clem's Avatar
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Ringmaster Jr Questions ???

I picked up a nice Ringmaster Jr. from Ebay.

It looks to be unflown (I think the person that built it, could not have flown it, as it appears they forgot to install the leadouts-so I will have to perform surgery).

The engine is an O.S. 20 FP R/C. I have a muffler on order, and will be attempting to order a venturi for it.

I have several questions:

How long should the lines be?

What gauge should the lines be?

What is a good propeller size?

Is there anything about this particular model that should be done, prior to flying it (i.e. areas that need re-inforcement, etc.).

Thank you all in advance.
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Old Dec 16, 2012, 07:54 PM
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LA Ming's Avatar
Poteau, OK
Joined Nov 2008
324 Posts
1. Typically, the line length for the smaller displacement engines (.15's .19's/etc.) Is 52 1/2'.

2. .015".

3. Pass: I don't know a thing about OS .20's.

4. Pass: Not intimately familiar with the airplane in question.

Oh well... that's only 2 out of 4... but it's a start!
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Old Dec 16, 2012, 08:07 PM
Team Compass/KBDD Team Pilot
Ah Clem's Avatar
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Thank you very, very much for the info!

It is greatly appreciated!
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Old Dec 16, 2012, 08:17 PM
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USA, TX, San Antonio
Joined Jun 2010
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Quote:
Originally Posted by Ah Clem View Post
I picked up a nice Ringmaster Jr. from Ebay.

It looks to be unflown (I think the person that built it, could not have flown it, as it appears they forgot to install the leadouts-so I will have to perform surgery).

The engine is an O.S. 20 FP R/C. I have a muffler on order, and will be attempting to order a venturi for it.
That's twice as much engine as the tiny little thing will fly properly with. It should have a modren 0.10, or a classic era iron engine, other than a TeeDee, in an 0.15 size.

Quote:
I have several questions:

How long should the lines be?
If flown on that engine, it will want to fly at about 90 mph, so if that's good with you, use .015 by 60' steel.

Quote:
What gauge should the lines be?

What is a good propeller size?
I think it will slow down enough, if you use an 11/4.

Quote:
Is there anything about this particular model that should be done, prior to flying it (i.e. areas that need re-inforcement, etc.).

Thank you all in advance.
I have to imagine the nose is far too weak after the surgery to open up the mounts that large. Make sure no specxtators are within a couple of hundred feet.


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Old Dec 16, 2012, 09:48 PM
gcb
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Joined Sep 2008
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Don't blame the builder for the engine size, the plans show a Fox .25 schnuerle in it...I have NO idea why.

I have an Enya .09 in mine.

George
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Old Dec 17, 2012, 10:52 AM
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USA, TX, San Antonio
Joined Jun 2010
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I had a K&B 19 GH back in 1957 that I didn't have any current model plane to attach it to. I did "know better", and did shorten the nose, beef up the motor mounts, etc, but it was still nose heavy, and very fast. On its first flight, that Ring Jr ended its brief life with a classic figure 9.

Covered in silk that stayed more or less intact, I don't think a single wing rib survived, but the end was also classic, a "bag of splinters" was all I really had left.


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Old Dec 17, 2012, 11:02 AM
Team Compass/KBDD Team Pilot
Ah Clem's Avatar
Joined Mar 2005
3,317 Posts
Well,

Perhaps I will leave the R/C carb on it, and throttle it back. I certainly don't want an overly fast or unsafe airplane.

Also, somewhere I have a Gilbert Thunderhead .11 (which I don't think I ever ran), so that is an alternative.

Thank you all for your comments. Your assistance is greatly apprecieated.
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Old Dec 20, 2012, 11:15 AM
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northernlightsfl's Avatar
Tok Alaska
Joined Aug 2005
147 Posts
Ringmaster JR

Back in the 60s I had one that I flew with a McCoy 35 on it flew on 60 foot lines .018.
Was at the time my favorite combat airplane.
FAST was not the word but FUN sure was.
This carried on with several after the first way into the 90s then I got too old to keep up with the speed
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Old Jan 03, 2013, 05:59 PM
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United States, TX, Spring
Joined Jul 2010
197 Posts
Here's a little control line humor (not my Ebay item, btw):
http://www.ebay.com/itm/Sterling-Jr-...item2a27c8885f

Get it?
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Old Jan 03, 2013, 06:34 PM
Team Compass/KBDD Team Pilot
Ah Clem's Avatar
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Top Flite performance?
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Old Jan 06, 2013, 05:38 PM
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The middle of Kansas
Joined Jan 2005
706 Posts
I learned to fly inverted and do lazy 8's with a Jr. Ringmaster back in the 60's with a Fox 15 slant plug. I still have the engine, and it still runs great. My Jr. was a little on the heavy side, but it didn't fly to bad. I flew the same engine on a Shark 15.
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