Prices shown exclude VAT 

Knief Racer

Product Code: KNIEF
 (2 reviews)

Price: $215.74

More than 10 in stock

Available Options

* Colour:
Quantity

Description

The TJI RC Knief is a new 1m (39") wingspan racer with brilliant performance. Good quality composite glass and carbon all molded model, good design, great price!

The pylon racer is very nicely molded with a strong wing spar and a massive battery compartment, which will allow 4S 2Ahr batteries, or even larger to be fitted with ease. Performance is very good, very straight at high speed, very nice high speed glide, and a reasonable landing speed with the flaps down. The aerodynamic shape is good. The model looks like a scaled up Sergey Sobokin Stinger Speed 400 pylon racer, which indicates a good heritage.


Knief Specifications
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


Knief Typical Weights
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
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
Elevator MKS DS75K, MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-126WV, Blue Bird BMS-127WV
Ailerons (2 servos) KST X08H, MKS DS75K, MKS DS6100, MKS HV6100, MKS HV6110, Blue Bird BMS-126WV, Blue Bird BMS-127WV


Recommended Powertrains
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
Use Mega 16/20/2 or 16/25/1 for higher performace setups (Kv 3000 - 4500)






Reviews 2  


 Review by:

Knief Racer

Unlike 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:

Knife Racer

Excellent product and service


Related Categories

Related Products 0

Shop Securely

Follow Us

facebook   twitter   Google My Business

Contact Us

HyperFlight
Drybank Farm
Fosse Way, Ettington
Stratford-upon-Avon
Warwickshire, CV37 7PD
United Kingdom
+44 (0) 1789 336166
sales@hyperflight.co.uk
Contact Form