General Information

How should we improve a very successful design even further ? - Well, we at CARF-Models asked ourselves that question very often – especially when the topic is aerobatics. Our TOC-proven Extra 330S already got many input from Pilots like Jason Shulman, but when he told us about the advantages of the Extra 260, we started listening immediatly. And not only to him. Also Frazer Briggs is known as a big 260 fan and flew his own designed 260 up to the podium at the Tucson Aerobatic Shootout several times.

But why is the Extra 260 so perfect for our kind of IMAC-style flying ? Well, take a closer look at the full size airplane: Wing and stabs are aligned very axial - the secret of every neutral flying plane. They are reasonable streched in wingspan – almost like a modern F3A design. Missing the counterbalances, the elevators perform very well in sequence flying and let the plance track perfectly. Another affinity to pattern planes. And last, but not least, its fuselage side-area is big enough to perform a good knife-edge in every situation, while still keeping a really good aerodynamic shape. Your Extra 260 3m will be a rocket even with an older 150cc engine and have an easy game with strong wind. When your friends are already taking their Yaks apart, you’ll probably laugh about that tiny little breeze.

 

 

Features

So far, so good. Let’s take a closer look at our 260. You know it – when there aren’t exclusive details , realizing new thoughts to make a modelers life easier – than it’s something, but not a CompARF.

  • It’s always an issue with the canopies: If you’re making them too small, you need the tools of a dentist to fix the simplest things. If you’re making them too big, the plane will be shaky and noisy, especially with that new 170cc engines. Time for a compromise ! That’s exactly what we were thinking while designing the 260 fuselage.

  • We listened to our valued customers all the time and we are always trying to improve things. Regarding the landing gear of our 260, we didn’t make experiments, we just made it solid and strong. You have to do a lot to break that. But even if you do so – ordering the spare parts with our new website was never as easy as it is right now. And then, it takes you exactly three bolts to exchange it. Quite simple, isn’t it?

  • As always, all the linkage horns are already glued in when you’re receiving the kit. We’re using high quality phenolic material, which is really hard to get sloppy. All our 3m planes have double horns to use ball-links, like it should be.

  • You have the freedom of choice when it comes to the servos. Mounting plates for JR or Futaba servos are included in the kit. While two highest power servos like the JR 8711 or similar are sufficient for each wing, there is also the possibility to use 3 without any modification.

  • The elevator doesn’t have any counterbalance, so it will a put a little bit more load at the servos at it usually does. That’s why we recommend the use of 2 highest performance - i.e. JR 8711 - servos for each stab. It’s also possible to use only one, but then you should be really careful to avoid flutter and replace your servo gear when it gets sloppy.

  • All twin cylinder engines from 120-170cc will fit under the cowling. A classic 150cc motor like the DA-150 will already provide enough power on canisters for the craziest maneuvers or sequences. A 170 with canisters starts getting insane. If you use a 170 on pipes, it’s not aerobatics anymore – it’s Air-Racing.

 

Wings

Let's take a closer look at the wings first. Have your ever heard of the "TAVS"-technology, developed by CARF-Models? Well, it stands for "Total Area Vacuum Sandwich" - making the wings so strong and stiff, no wooden or foam-sandwich plane can compete with. A rib and spare structure inside the wing is already prepared for the aluminum spar tube and all the servos. Its made from high quality balsa and plywood, and - where necessary - it is coated with fiberglass or carbon. All hardware to install the aileron servos is included. You'll find phenolic frames for your choice of JR or Futaba servos in the hardware bag. You always should use one servo at the position close to the wing-tips. It's your choice, if you go with only 2 servos per wing or if you want to use 3. In the last case, you can couple 2 servos and mount them to the first rib of the wing. Of course, all phenolic parts shown at the pictures are included.

 

 

Stab

The stab's inner structure is made from fiberglass-coated balsawood to keep it lightweight. You have to glue in some plywood-frames to mount the servos. Again, there are frames for JR or Futaba included.

 

Fuselage & Engine

The fuselage is stiffened with kevlar and carbon fibers where necessary. The engine dome forms one unit with the rest of the fuselage to keep the vibration and noise-level at a minimum. All popular 120-170cc twin-engines fit under the easy-to-remove cowling.

On all our modern kits, we modified the landing gear mounting. We didn't make experiments, we just made it solid and massive to keep you happy, even if one landing is less than perfect. And if really something happens, the landing gear legs are quite easy to replace. Three screws and that's it - not that bad, isn't it?

 

 

Flying Characteristics

What is the most important thing, a good IMAC plane has to be: Right, neutral. So what's the secret about that: There is no secret. Simply care about an axial wing and stab position and about the same fuselage side area above and below the wing axis. That's it. It doesn't take long to recognize, that we did our homework with our Extra 260. You'll need only a very very small amount of coupling during knife edge. A special feature, also the full-scale Extra 260 offers, is the stab without any counterbalances. Well, we don't want to lie, and there are not only advantages. We highly recommend to use 2 highest power digital servos, like i.e. the JR 8711, for each elevator. And please take always a look of parts getting sloppy and if so, replace them.
The good things are: You'll getting an amazingly clear and strong response to your elevator controls. Use it for the crispiest snaps you ever saw or for the insanest freestyle maneuvers. It's you on the controls, we only care about the right material.

While still providing enough fuselage side-area for the craziest knife-edge maneuvers, the Extra 260's shape is quite aerodynamic. Even with a classic 150cc Engine on canisters, you have more than enough power to beat the wind. You'll probably laughing about that tiny little breeze, when your friends are already taking their Yaks apart.

Look at these large, aggressive ailerons ! The Extra 260 is doing amazingly fast rolls. You don't even need ridicously big throws for that, thanks to the well-proven airfoil and the clean surface of a full-composite airframe.

We haven’t talked about 3D and freestyle maneuvers so far. Well, it’s good to hear that upcoming, super talented pilots like Chris Brislin from Australia are prefering the 260 also for that, flying it to the podium at the Shootout 2008 with an incredible freestyle routine, featuring all the crazy new maneuvers. With its large control surfaces and its incredible power-to-weight ratio (already with older engine designs), the 260 has everything you’ll need for any freestyle maneuvers you can imagine.

 

 

You want to have all the benefits of a Yak, while still prefering the look of an Extra ? - Well, then the decision is easy: The CARF-Models Extra 260 has everything you’ll need.

 

    118" (3000 mm)

 

     108" (2750 mm)

 

    37.5 - 40 Lbs (17 - 18 kg) dry

 

    150 - 170 cc

 

    9-11 high power digital servos
      

Instructionmanual (10.5 MB)                                                                               Photosheets (2.1 MB)

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