Knife Specifications | ||
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Wing span | 1.00 m | 39 in |
Wing area | 9.8 dm2 | 153 sq in |
Length | 64 cm | 25 in |
Flying weight from | 550 g | 19.4 oz |
Wing loading | 56 g/dm | 18.3 oz/sq ft |
Aspect ratio | 10.2 | |
Wing airfoil | 7% proprietary | |
Dihedral (EDA) | 1.3º | |
Spinner Diameter | 38 mm | |
Battery compartment | approx 40 x 38 x 170 mm | |
Centre of Gravity | 42 - 47 mm from wing leading edge | |
Controls | Elevator, ailerons, throttle |
Knife Typical Weights | ||
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Wing | 147 g | 5.2 oz |
Fuselage and fin | 85 g | 3.0 oz |
Tailplane | 17 g | 0.6 oz |
Accessories | 17 g | 0.6 oz |
Total structure | 266 g | 9.4 oz |
Receiver | 6 g | 0.2 oz |
Elevator servo | 8 g | 0.3 oz |
Aileron servos (2) | 16 g | 0.6 oz |
Speed control | 25 g | 0.9 oz |
Motor | 74 g | 2.6 oz |
Prop & spinner | 15 g | 0.5 oz |
Battery | 140 g | 4.9 oz |
Flying weight | 550 g | 19.4 oz |
Recommended Control Throws & Mixes | |
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Elevator | 3 mm up, 3 mm down |
Ailerons | 4 mm up, 4 mm down |
Snap Flap | full up elevator -> 1 mm down flap |
Landing mode | motor off -> 5 mm down flap |
Recommended Servos | |
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Elevator | KST X08, Blue Bird BMS-A10H, MKS DS75K, MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-126WV, Blue Bird BMS-127WV |
Ailerons (2 servos) | KST X08H, MKS DS75K, Blue Bird BMS-A10S, Blue Bird BMS-A10V |
Recommended Powertrains | |
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100 mph | Mega 16/15/3, 4.7x4.7 35A ESC, 3S LiPo, 350W |
110 mph | Mega 16/15/2, 4.7x4.7 50A ESC, 2S LiPo, 400W |
120 mph | Mega 16/15/3, 4.1x4.1, 50A ESC, 4S LiPo, 500W |
130 mph | Mega 16/15/2, 4.1x4.1 60A ESC, 3S LiPo, 600W |
135 mph | Mega 16/20/2, 4.5x4.5 60A ESC, 4S LiPo, 650W |
Review by: FT
Just get it! You won't regret.Has been waiting for almost 3 months. Once I got the notification that the plane is back in stock I had order it immediately. The plane itself looks perfectly made and perfect finish. All of the parts you need is included. I also had order the recommended servo from Blue Bird. I still have to start building it and hopefully will maiden soon. Big thanks to Neil for a perfect customer service!
Review by: Chris
Just what I wanted!After reading other reviews have gone for a lightweight set up: 2207 2750kv quad motor, 45a Speedix ESC, 4 cell 1100mah lipo and 4.74x4.75 APC prop. Radar gunned at 145mph. Exactly the sort of speed I was looking for without too much outlay. Relatively easy build with lipo up front to achieve stated c of g without additional weight. Be careful with elevator control horn: too short.
All in all very pleased.
Review by: Phil
Knief RacerUnlike the Voodoo this model takes some time and care to set up but once done the rewards are there; the longer wingspan gives a broad scope of ability; a very light setup can glide off power for a while; launches and landings are very stable and predictable. Initially using a conventional inboard motor plus 38mm spinner I was unable to achieve absolute zero vibration throughout the whole rev range. After some research I decided to try something radically different and installed a Hypetrain 2207 Acro motor outboard of the firewall. Weighing a little over 30g but capable of producing around 2kg thrust, this quad motor is a revelation. With a balanced prop there is zero vibration throughout the whole rev range. Even with a light weight first run setup, speed is excellent, using a 2450Kv motor running a 5.5x4.5 prop. With a 1900Ah 3 cell pack I got around 8 minutes of mixed flying which could have easily been 10 minutes with more climbing and gliding.
Review by: PA Toler
Knife RacerExcellent product and service