SpeedCopter Powered by T-motor

SpeedCopter   www.rc-multicopters.com/en
The SpeedCopter project involves the development of a VTOL aircraft (Vertical Take Off and Landing) with a wingspan of 6 meters in total.  The aircraft is a combination of an airplane and helicopter (in this case a multicopter) and combines the best properties of both types.

The aircraft is powered with high power MN 4014-400KV brushless motors which are mounted on an axis that can be rotated by using servo motors. In the vertical position the propellers spin horizontally and generate a lift-force for taking off/land vertically or hover in mid-air like a helicopter. For a long distance flight the SpeedCopter turns the propellers by 90 degrees and becomes a conventional aircraft with a high travel speed at low energy consumption. Due to the strong motors payloads up to 10kg are possible which can be used for carrying cameras.
So what makes the SpeedCopter so unique?
The main body is a flying wing where all components are mounted on. This flying wing is designed exactly according to the rules of aerodynamics and has an extremely low air resistance, so it can reach a speed above 100km/h.

The SpeedCopter has another unique feature: extendable wings (also: telescopic wings). They can be used for the sailing mode where the aircraft can fly with a high efficiency at low speed which results in longer flight times. For an optimal aerodynamic behaviour the angle of attack is adjustable to guarantee optimized flight behaviour with a very low air resistance.
An animation which shows the principal function can be found here: http://www.youtube.com/watch?v=akNe1ojNEZk
The main feature that makes this project unique is its energy supply. Unlike all other multicopters the SpeedCopter is not equipped with Lithium Polymer batteries (LiPo). Instead it uses a combustion engine to drive an alternator, which generates the energy that the brushless motors need. Additionally there is a little lithium iron phosphate battery (LiFePo4) built in, which supports the alternator if more energy is needed.
The reason for this alternative type of power supply is the much higher energy density per kilogram of liquid fuels in contrast to lithium polymer batteries. The energy density of gasoline is almost 80 times higher than the energy density of LiPo batteries, so despite of the loss of efficiency by the combustion engine the flight time can be increased by a factor of 10! This will allow the SpeedCopter to reach flight times at least up to 3 hours despite its high take-off-weight of 18kg. Additional fuel can be transported on external tanks under the wings, so the flight time can be increased even more.
Primary this SpeedCopter is a prototype to a new kind of aircraft.
The main goal is a long flight time and high pay load. It will be used for camera flights with a heavy high definition camera with a 3-axis gimbal. There are three different Flight modes:


  • Copter mode: propellers are in horizontally position like a commercial multicopter
  • Sailing mode: motors are tilted 90 degrees forward, the telescopic wings are extended to fly at a high efficiency
  • Speed mode: the wings are detracted and the internal combustion engine directly drives a propeller with a high number of rotations.
  • These modes can be switched also during flight which will have a great potential for some interesting videos.

A later version of the SpeedCopter can also be used in case of a catastrophe (e.g. floods) for primary care. If there are any unreachable areas or dangerous areas the SpeedCopter will be able to supply people with necessary goods by only using a remote control instead of using a helicopter. The operational forces can take off vertically with the supplies and rise to several hundred metres, switch to airplane mode and fly to the target. At the target position the SpeedCopter switches back to the copter mode to land precisely.
The main advantage is that operating with the SpeedCopter is simple and very cheap compared to a helicopter. A helicopter deployment costs several thousand euros, a fuel charge for the SpeedCopter costs less than 10 euros.
Technical specs:
Wing span: 6m
Height: 0.8m
Weight (minimum take-off): 18kg
Payload: 10kg
Motors: T-Motor MN 4014 – 400KV
Propeller: 16x5,5”
Materials: Oak-, Balsawood, Aluminum, Carbon
Flight time (approximately) : > 3 hours
For more information, pictures and news please check out our website: www.rc-multicopters.com/en