• MaxaMaxa
  • MaxaMaxa
  • MaxaMaxa
  • MaxaMaxa
  • MaxaMaxa
  • MaxaMaxa
  • MaxaMaxa
  • MaxaMaxa
  • MaxaMaxa
  • MaxaMaxa
  • MaxaMaxa

Maxa

The Maxa is a highly competitive composite, hollow-molded wing sailplane based on a design by Joe Wurts.

It features hollow-molded wings composed of two layers of Spread-Tow (ST) carbon providing ultimate in stiffness, light weight and strength.

The 21st century design from Vladimir's Model employs Rohacell as the flap core, which results in amazingly lightweight, thin wings of surprisingly high strength. The combination of high aileron stiffness and low weight eliminates flutter even at the highest flight speeds.

Maxa wings are built using bi-axial carbon Spread Tow fabric of our own, proprietary design and production, made of high strength IMS65 carbon fibers. The weight of this fabric is ~39gm/m², which produces lighter and stronger parts.

Maxa's wing spar is cured at high temperature under vacuum. The spar caps are made in an autoclave from high strength carbon pre-preg are securely glued to the multi-layer web. We use high strength carbon fiber IMS 65 for the spar caps. The spar durability is improved by the use of balsa shear web. Balsa is more durable than any other material in this role. Placing balsa at ±45 degree bias not only improves it ability to carry shear load, but also improves the strength of the glue joint between the web and the spar caps.
Additional layers of Spread Tow carbon improve the stiffness of the wing spar.

    We build wing spars with three spar cap widths for varying wind strengths:

    • Light version (for winds < 11 mph)
    • Windy version (for winds < 18 mph)
    • Storm version (for winds < 27 mph)

The tail boom is made from thin carbon spread tow laid at ±45 degree bias. Between the spread tow layers, there are two layers of unidirectional high strength carbon fiber. This design yields stronger, stiffer, and more thermal stable tail boom which weighs only 46 grams without pushrods. An optional long boom (LB) is available - it is 5.25" longer than the standard boom. The long boom improves yaw and pitch damping and improving handling and stability at slow landing speeds.

One screw holds the rudder on. It can be removed for transportation saving 5.25" in length and thus fitting in a standard model transport box.

The use of our proprietary, made in-house, high strength Spread Tow carbon laminates in boom and wing skin resulted in a glider with world lowest wing loading.

The Maxa has a fiberglass/Kevlar fuselage with a drooped nose and a built-in ballast tube.

Here is what Maxa's designer, Joe Wurts, had to say about the longer tail boom option:

The longer tail provides superb pitch/yaw damping and provides a bit lower pilot workload. For me, the difference shows a little bit in the final seconds of landing, as evidenced by my >99 landing average for the 15 round competition.

The long tail also provides stable trimmed flight with camber at very slow speeds to get the lowest minimum sink in smooth conditions. In the early morning flights prior to the start of convection, I could trim the plane to match the light winds and just hang in a single location while all of the other planes were zipping around. If I wanted to zip around, I just switched from the min sink flight mode to cruise, and the plane cruised around quite nicely.

While doing some landing practice prior to the start of the comp, I found that I could do about a minute of flight from a hand launch in flat conditions with only about 1 m/s headwind for the throw. That really impressed me, the plane really hangs nicely in min sink mode. The aerodynamics met my design expectations (I had very high expectations), and Vladimir has exceeded my expectations in regards to the fit/finish and construction.

1 – Outer layers of our carbon spread tow laid at a ±45 (±30 Maxa Windy) degree bias. Such layup results in high torsional stiffness in conjunction with the spar. Outer Spread Tow layers improve the wing durability and provide additional stiffness
2 – Herex core of the composite sandwich
3 – Inner layer of Kevlar on a ±45 degree bias (Spread tow on a ±30 degree bias on Maxa Windy)
4 – 11.5mm (15mm on Maxa Windy) wide spar caps of high strength IMS65 carbon fiber
5 – Rohacell flap core
6 – The front wall of the aileron is made of balsa plywood covered with glass fabric. This design reduces the weight of the control surface, while its height together with Spread Tow outer layers results in unsurpassed torsional stiffness
7 – Strip of the hinge material
8 – Rear wall of the wing from balsa plywood and fiberglass

1 – Spar caps are hot cured from carbon pre-preg in an autoclave - 11.5mm wide (15mm wide on Maxa Windy)

2 – Outer balsa webbing at 45 degree bias

3 – Spread Tow carbon of ±45 degree layup totaling  0,04 mm in thickness

4 – Inner balsa webbing at 45 degree bias


Model will be shipped in a returnable Sportube.


Specifications:

Version

Wing Span

Length

Wing Area

Empty Weight

Flying Weight

Wing Loading

Controls

Airfoil

Maxa 3.5

138"

68"

1,144 sq. in.

48 oz.

62* oz.

7.8 oz./sq. ft.

AFRE

J00-J03

Maxa 4

154"

68"

1,273 sq. in.

51 oz.

63* oz.

7.2 oz./sq. ft.

AFRE

J00-J03

* depending on version and installed equipment

Availability, Pricing, Ordering:







Color Configurator



Suggested RC Components

MKS 6100 or HV MKS 6100 Servos

Servo Frames

5-cell Receiver Battery

JETI 7-ch. or Spektrum 9320T Receiver

Tools

Color Configurator

Documents

Maxa Building Instructions (coming)

Maxa Wing Settings Template
Maxa Aileron Settings
Maxa Flap Settings
Maxa Control Throws

Other

Maxa Replacement Parts

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