The wait is finally over. Ultra is proud to release the first of our 50cc "UL" Series ARF's. Based on the huge success of our 29% Giles 202 UL ARF, the 87" Yak 54 was designed for you, the serious 3D flyer. Our "UL" Series stands for "Ultra-Lite". Ultra's "UL" designs are built to the highest level of quality and completion, before arriving to you, the customer.
Our 87" Yak 54 ARF incorporates "State-of-the-Art - Revolutionary" construction techniques seen in today's "High-End" competition series designs, now available in economical, traditional, "built-up" balsa and ply construction.
The Yak 54 has unbeatable stability and precision flight characteristics. The Yak is a great choice for both the beginner and advanced competition competitor.
We tested our model with a DA-50 gas engine. The all-up weight, ready-to-fly, is an incredible 15 3/4 pounds.
Features:
- Construction: Precision laser-cut balsa & plywood construction.
- Wings: Wing & stabilizer are built-up 2-piece designs. Removable stabilizers.
- Wing Spars: Carbon fiber wing and stabilizer tubes / joiners.
- Incidence: Factory pre-set.
- Control Surfaces: 3D control surface area, double beveled.
- Covering: Factory applied Oracover covering. Vinyl graphics also included.
- Cowl: Precision color matched pre-painted fiberglass.
- Wheel Pants: Precision color matched pre-painted fiberglass.
- Canopy / Hatch: Pre-formed & pre-painted.
- Landing Gear: Carbon composite one-piece gear. Pre-painted. Mounted to aluminum tri-stock in the fuselage.
- Servos: One per Aileron / One per Elevator / One Pull-Pull Rudder / One Throttle.
- Hinge Slots: Pre-slotted for 1/4 scale pinned nylon hinges, included.
- Tuned Pipe: Pre-built tuned pipe / muffler tunnel.
- Building Time: 9 - 12 hours.
Includes:
Pre-built and covered wings, tail assemblies, and fuselage. All necessary hardware including titanium pushrods, carbon fiber servo arms, ball links, landing gear, wheels, servo tray, Carbon Fiber Wing and Stab tubes, and a photo illustrated instruction manual.
Requires:
- Engine: 50cc gas engine recommended.
- Muffler: Tuned Pipe or Pitts style suggested.
- Radio: Minimum (4) channel radio. (Computer radio recommended)
- Servos: (5) High Torque - 125 oz. in. of torque - minimum. We only recommend the use of metal gear servos. The control surfaces are very large and deflect over 45 degrees. A lot of power is required to prevent flutter and provide excellent holding power and full deflection. We used JR 8611 Digital Servos on all control surfaces in our model.
- Spinner: 3 1/2" or 4" Spinner.
- Misc. Items: Foam Padding, Fuel tubing, fuel filter, propeller, building and field equipment.
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