Blemish Z1 - From time to time we have to offer kits that we consider to be blemishes. These planes may have a slightly dry layup or some surface irregularities etc.; structurally the planes are fine and will fly very well. We offer these kits at a reduced price. In the pictures above we have included photos of the worst irregularities/blems from our entire stock of planes. We did this to give folks an idea of what we consider a blemish and to let you know you will not receive a kit that looks worse than what you see in the photos. If you can live with what you see in the photos you will not be disappointed if you purchase a Z1 blem.
If you have not seen the Z1 performing, then you are in for a real surprise. This is not like any other flying wing you have seen! Capable of flying in the lightest lift conditions, the Z1 is an excellent choice for thermal hunting, or those light lift days. The Z1 has undergone extensive testing and modifications to bring you one of the best performing flying wings we have ever seen.
The smooth finish and custom airfoils provide laminar flow on both the top and bottom surfaces, while still providing forgiving stall and spin characteristics. Thanks to high density foam, carbon fiber and Kevlar, the wing is very light and rigid despite having such a high aspect ratio and thin profile.
Flaps - For tight landing areas, you can add flaps to the Z1. A link to the instructions for this modification is located in the Recommended Setup Section at the bottom of this page.
Span: 68 in (1727 mm)
Wing Area: 502 sq.in (32.4 sq.dm)
All-up-weight: 14 -16 oz (397 - 453 gm)
Aspect Ratio: 9.2
Wing Loading: 4.3 oz/sq.ft (13.1 gm/sq.dm)
Root Airfoil: Zup03068 (6.8% thick) Tip Airfoil: Zup04081 (8.1% thick)
Skill Level: Intermediate to Expert
(2) Wing halves. Sanded and ready to join
(2) Carbon and fiberglass over balsa winglets
(1) Carbon tow hook
(4) 4 x 10mm nylon screws (for the winglets)
(1) Black fiberglass cover for the battery and receiver
(1) Black carbon cover for the servos
(1) Fiberglass cloth for joining the wings
(4) Fiberglass control horns
The airplane comes with nearly all of the major work done. Plan on spending a few hours to glue in the control horns, stick in your servos, glue the wings together and bolt on the tips.
Any transmitter with elevon mixing will work. However, programmable transmitters make the Z1 easier to fly and give more control options. For example, here are a few common setups that can be done with a programmable radio:
The receiver bay is about 0.5 in (12 mm) thick, so an end-pin receiver is recommended. If you are using 2.4 GHz, you'll need to run one antenna up and one down to get the signal outside of the wing and away from the carbon. Dual antenna 2.4 GHz receivers work great, such as the Spectrum AR6255 and FRSKY D6FR.
The servos also need to be less than 0.5 in (12 mm) thick, and torque above 15 oz/in. An 18-in long servo lead is needed with no connectors in the middle in order to fit down the inside of the spar. Soldering a longer lead is typically required.
The battery bay was designed for a AAA 4-cell flat pack. The Z1 typically requires around 1.5 ounces of ballast if you use a 2 ounce battery. Since the battery bay is almost at the front of the aircraft, saving battery weight has little impact on the flying weight.
15 or 30 Minute Epoxy and wooden sticks for applying glue
Sharp hobby knife or razor blade
Flat head screwdriver
3M "77" spray glue (optional)
150 grit sand paper
Small weights for balancing
|Airfoil||Root Airfoil: Zup03068 (6.8% thick) Tip Airfoil: Zup04081 (8.1% thick)
|Wingspan||68 in (1727 mm)
|Wing Area||502 sq.in (32.4 sq.dm)
|RTF Weight||14 -16 oz (397 - 453 gm)
|Construction||Carbon, Foam Core Wing, Kevlar
Z1 Building instructions
Main Instructions (pdf)
Flap Instructions (pdf)