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Circle Dancer 3000 RES Glider V2

Product Code: CDG-3000-RES
 (4 reviews)

Price: $478.78

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The Circle Dancer 3000 RES Glider V2 is a beautifully constructed balsa and carbon almost ready to fly version of the venerable Bubble Dancer by Dr Mark Drela. The RES appellation indicates that this version is controlled using Rudder/Elevator/Spoiler controls. The wing has generous dihedral and a large central spoiler fitted, keeping to the intent of the Drela design.

Although the structure is simplified in comparison to the original BD design, the aerodynamics are very similar, and the Circle Dancer 3000 RES V2 is a stable and easy to fly model with impeccable thermal performance, and a reasonable speed range.

The fine fuselage consists of a lightweight Kevlar, glass, and carbon pod molding with a small pylon for mounting the wing above the fuselage, to reduce interference drag. The fuselage nose incorporates a large (18 cm long) hatch to allow easy access to the motor, battery, and rudder and elevator servos. The hatch is very nicely molded from carbon fibre and incorporates a positive attachment system. The V2 fuselage has been updated to use a molded carbon tailboom incorporating a small pylon for the tailplane/horizontal stabiliser. The pushrod outers are bonded in place, and all the tail pushrod hardware is supplied. The fuselage update has reduced the fuselage weight, improved strength, removed weight from the tail extremity, and has reduced the size of the shipping box, allowing us to post the model overseas more easily.

The tailplane is a feather weight built-up balsa and carbon construction, covered with lightweight transparent film and is supplied ready to bolt onto the rear pylon mount. The V2 tailplane is of improved construction and includes a separate ready hinged elevator for faster pitch response.

The wing is expertly constructed from balsa and carbon, with beautifully applied transparent film covering, in contrasting colours. The centre panel incorporates a large spoiler to give good approach control. The standard of construction is excellent, and the prefabrication is very complete. The only things left to do are gluing the tailboom to the pod, gluing the fin, installing the control surface control horns, fabricating linkages for the flaps and ailerons, and fitting the RC and battery.

The photos all show the previous V1 model.

See this RCGroups Circle Dancer thread for useful build info.

Circle Dancer 3000 RES Glider Specifications
Wing span 3.0 m 116 in
Wing area 61.2 dm2 949 sq in
Length 169 cm 66.5 in
Flying weight from 1060 g 37.4 oz
Wing loading 17.3 g/dm2 5.7 oz/sq ft
Aspect ratio 14.2
Wing airfoil AG35/36/37
Dihedral (EDA) 11.0º
Centre of Gravity 100 - 110 mm from wing leading edge
Controls Rudder, elevator, spoiler, motor

Circle Dancer 3000 RES Glider Typical Weights
Fuselage 273 g 9.6 oz
Centre panel 237 g 8.4 oz
Wing tips 226 g 8.0 oz
Tailplane 32 g 1.1 oz
Rudder 18 g 0.6 oz
Accessories 60 g 2.1 oz
Total structure 846 g 29.8 oz
Glue etc 3 g 0.1 oz
Wiring 16 g 0.6 oz
Receiver 15 g 0.5 oz
Rudder & elevator servos 20 g 0.7 oz
Spoiler servo 10 g 0.4 oz
Battery 150 g 5.3 oz
Nose weight 160 g 5.6 oz
Flying weight 1060 g 37.4 oz

Circle Dancer 3000 RES Recommended Servos
Elevator & rudder MKS DS6100, MKS HV6100, KST DS145MG, Blue Bird BMS-105HV, Corona DS843MG, Hyperion DS09-AMD, KST DS113MG
Spoiler MKS DS6100, MKS HV6100, Blue Bird BMS-105HV, KST DS113MG, KST DS135

Circle Dancer 3000 RES Control Movements
Rudder 60 mm each way
Elevator 15 mm up, 15 mm down
Elevator neutral 21 mm from the trailing edge to fuse top
Spoiler 75º up deflection

Reviews 4  

 Review by:

Circle Dancer 3000, " a pure joy"

having been flying DLG s a while now & knowing the quality of service from Neil at Hyperflight , I decided to get a a larger & what I believe to be more pure gliding experience , so I ordered a Circle Dancer 3000 kit from Neil , as always, the kit arrived within 24hrs, massively strong box, with all the parts very securely bubble wrapped , EXCELENT SERVICE, upon unwrapping I was astonished at the quality of the parts, a beautiful kit to say the least, the next week I assembled the fuselage ,all quite straightforward, carefully fixing the pushrods ,getting the correct working lengths, the KST servos fitted beautifully ,the pre cut ply mounting board also no prob , there is ample room in the pod too fit a large battery & required nose weigh, the wing joiners require some gentle sanding too achieve a smooth fit ,great care IS NEEDED when fitting wing tips , it would be very easy to crush wing sections! the only issue I had with construction, is the spoiler mechanics, the included plan , which I followed to the letter, just would not would not work, after several attempts , I finally got the required result by trial & error ,bit frustrating ! BUT the final assembled model is just SUPERB ,,, all up weight about 38oz ready too fly , now all I need is a day to test fly "CANT WAIT,"

 Review by:

This is a lot of very beautiful glider for the money. All components were well protected with bubblewrap and suspended inside a sturdy box - yet another example of Neil's outstanding care and service.

For the last ten years I have been flying DLGs from my small field at the end of the garden - all from the Vladimir stable, including three Snipes. Until recently I had never considered anything beyond a 1.5m span, as this field has a number of trees around the perimeter as well as power lines crossing diagonally. However, I recently ventured to 2m with a Pulsar 2 and a MadRES. These felt huge at first and the trees seemed nearer, but I soon got used to the larger gliders without any disasters, and the field is big enough to get a reasonable height from a hi-start launch. Then, of course, my thoughts turned to a 3m wingspan: surely this would not be practical? I didn't want to spend a huge amount in case it all came to nought, and that is how I decided to try the Circle Dancer.

The build quality and finish are excellent, and this sailplane represents terrific value. Being a completely open structure with only a balsa leading edge and no carbon D-box, the wing looks a little flimsy, but in fact it is much stronger than it appears, although winch launches might result in something spectacularly horrible. Everything has been pared down for minimum weight commensurate with sufficient strength for normal thermalling. For example, all the wing ribs have had as much balsa removed as possible without compromising rigidity.

As this is a simple RES sailplane, the only work required is installing the servos, and there is plenty of space to do so.I did have a bit of an issue with the spoiler and in the end abandoned the horn and short pushrod system shown in the full-size diagram provided by the designer and instead simply used a long servo arm acting directly onto the underside of the spoiler. Two pairs of 5mm magnets not quite making contact were enough to keep it closed. The trailing edge of the spoiler does not sit quite flush with the wing surface - almost, but not quite. This is not a design or construction fault, rather it's just balsa being balsa. I might make up a balsa-ply laminate replacement.

When the time came for the Dancer's maiden on a cold November morning, I was nervous: conditions weren't ideal with a very light breeze diagonal to the launch line. Would the hi-start be strong enough to haul this heavier machine into the sky? Would she be responsive enough to manoeuvre in such a small field? I need not have worried: she went higher than I expected, and once up there just seemed to want to stay there. What a lovely sight she was, smooth and graceful and just itching to find a thermal. I was reminded of the last time I had a big sailplane, the Clean Machine back in the late 1970s, which I built from a plan (anyone remember that one?)

As for the Dancer's responsiveness, she reacted instantly to rudder input and proved capable of smooth and tight turns. The spoiler was very effective and I was able to make precise landings. All we need now are some decent thermals - but we may have to wait, judging by the current spell of unsettled weather.

I couldn't be more delighted with my first choice of 3m sailplane. With its excellent design, workmanship, and value for money I am looking forward to many happy hours of thermalling with the Somerset buzzards.

 Review by:

Circle Dancer 3000 RES Glider

I've got Circle Dancer 3000 RES plane from Hyperflight as an optional entry into "woody" contests. Usually, I am flying high end open, RES, ALES planes. So, the following is my feedback for Circle Dancer 3000 RES plane:
- Hyperflight did an excellent job of the packing and shipment. Plane arrived to California quickly and safe.
- Airframe quality and finish are very good. No complains here.
- I've made some modifications during assembly process. I've replaced push roads by carbon push roads. Replaced steel tips joiners by titanium. Used both of them at the initial flights. Better dynamics with Ti joiners. Modified spoiler actuation by using pin on the servo arm and slot on the spoiler. Installed spoiler servo in the frame for easy servicing if required. Added supporting pin for the rudder at the bottom of the fuselage. Added Vladimir's tow hook (no tow hook provided with the kit)
- Shortened all four plastic mounting bolts.
One note - if I will assemble this plane again, I would change stab control horn to a straight one. Would help with stab at-the-field assembly process.
Also, bolted wing and stab interfaces could be improved in structural and aerodynamics aspects.
Plane ended up very light. Thermals well. Almost as a HGL.
What I wish to have is more strong tips to center panel interface. It will be good to know if builder wrapped tube spare at the joiners interfaces (cannot see that, hidden by shear webs). Plane is very sensitive to tow loads, cannot take any error in applied launch loads. Launch is challenging and week aspect of this plane.
Other then that very good soaring machine.

 Review by:

Circle Dancer glider

I chose this model because I wanted to get back to basics and have a pure glider for bungee launch in search of thermals. Apart from some transport damage due to inadequate packaging by manufacturer which was suitable resolved by Hyperflight the model was very impressive. It went together well and with simple rudder elevator set up it's quick and easy to set up at field. The only downside of this model is the fin which is a little frail as it is so would recommend carving a foam infill. As far as flying is concerned it is very sensitive to the slightest bit lift and can float around from bungee height without loosing height for some time. Still waiting for good thermal weather.

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