Hye guys i was cleaning up my grandmothers attic and found this old plane, box and instructions, is there anyone that can tell me about it, rarity, value? etc .. thanks

The ring master was one of the most popular U-Control models of the 50s and 60s. Most of us had one as our second plane in my area. It used about a .15 to a .19 engine. One new in the box/kit would have some collector value but there are plans still available so anyone wanting one can still build the plane, there isn't a lot to them. To find an original is rare these days but they don't have a lot of value. Outstanding little stunt plane though and brings back a lot of memories. At one of the RC swap meets you could get a couple bucks out of it but used or broken planes don't bring in a lot of money.

Like Gray Beard says, the Ringmaster is long gone but there are out-market kits available and every old CL flier knows about the Ringmaster.

For lots of help and talk, try these:

http://www.stunthanger.com/smf/

This is where CL really comes into being. You will find that Ringmaster is spoken there very well.

http://brodak.com/
A commercial forum but the owner here is the best - Tied of the best - as Stunt Hanger is also a real helper to all CL not just stunt. Both are far beyond
99.9% of the forums. Brodak and Storic keep CL well and excellent.

It is very easy to produce a replica of the Ringmaster. I have one with an old early-on Fox 35. Great as long as nitro is LESS than 8% and oil is 27% or better with at least 60% castor oil. They will fly with a normal .19 but .25-35 is better, IMO. I also have one with a ST .29 using 3rd line. Flies very well. Ringmaster, sport engine, .19 to .35, and a 9-5/6 or 10-4 (19-.25) 10-6 or 11-4 prop (29.-.35) and low nitro high oil fuel makes for a fun day at the circles.

actually there are several classic control line kits available from Brodak mfg. including the Ringmaster http://brodak.com/control-line-kits/...aster-kit.html and many of the more popular Goldberg kits like the Wizard,Lil Jumping Bean.and the Lil Satan to name a few

Well , what do you know. Hoss was wrong again.

http://brodak.com/control-line-kits/...aster-kit.html

And only $65.00 for $5.00 worth of wood, such a deal.

Being wrong is no cherry to me. BTDT many times. However please inform me what I was wrong about as far as Brodak and "Ringmaster" kits.

Page 13 of Brodak Kits list: Ringmaster S-1 (the original) sku clp-82 @ $87.99. JR. Ringmaster sku clp-83 and the 1/2A Baby Ringmaster sku# clp-84, also well over-priced for me. $10 of balsa and a tad of ply and I can make a RM S-1 in a couple nights.

So shock me!

Edited to add: There was a "Ringmaster" CL full body airplane back in the mid-late '40s. I do not remember who and I am too lazy to research it. The Sterling RM 42"was flying before I graduatedfrom High School in 1954. Kit was a whopping $2.95, no fluids.
The Jr. came out sometime then. I never was interested as I was more into real stunt and scale then, along with some FF. 9 months after H-S I qualified for USAF Avn Cadets. Things did change a bit for a few years.

I believe the full bodied fuselage Ringmaster was called the "Imperial."

That Ringmaster, the "Imperial" was a later Sterling kit. The one I speak of was before Sterling ever produced their first Ringmaster kit. I cannot remember if the one I speak of whether it was a kit or not but it was in some magazine's plans. I also seem to remember that it was in the spark ignition engine days.
Lots of real history in those 1945 -1950 days. Ray Arden did make a new world with his glow-plug like this new world of the electric model motor and the Lithium battery.