EXTRA DUO DISPLAY TEAM - 40% RC EXTRA 330 AND A FULL SIZE EXTRA 330 - SOUTHERN HEADCORN SHOW - 2022

Описание: PILOT OF THE REAL EXTRA 330 IS CHRIS BURCKETT.

PILOT OF THE 40% EXTRA 330 IS MIKE WILLIAMS,

Little and Large Extra Duo:
Chris Burkett flying the Extra 300S – G-Force Aerobatics
With Mike Williams Flying the 40% Scale Model
Please see the website http://www.gforceaerobatics.com for similar/supplementary information.
“What do you get when you put Chris’ full size Extra together with Mike’s large scale model Extra?
ANSWER: The most amazing display team I have ever seen” [UK Airshow Forums]
Voted a Top Ten Airshow Moment of 2013 by UK Airshow Review:
“Step forward Chris Burkett and Mike Williams, the former flying his Extra 300, the latter remotely
piloting his 41% scale model of the Extra 300. This was a display like no-other I’ve ever seen, as both
‘little and large’ flew an aerobatic pairs routine with a precision you simply would not think possible
whilst one of the pilots remained on terra firma. Stunningly flown and highly original – exactly what our
top ten listing is all about!” [UK Airshow Review]
The display sequence is of course subject to weather – these notes give information on a typical full
sequence when the cloudbase allows (c. 2000 feet).

Extra 300S Statistics
Engine: Lycoming AEIO-540, 300hp at 2700 rpm
Maximum full power fuel consumption: 1.5 litres per minute
Propeller: MT 4- bladed, constant speed (3 bladed version also available but noisier!)
Empty weight: 630kg
Maximum aerobatic take-off weight: 820kg
VNE never exceed airspeed: 220 knots
Stall speed from steady flight: 55 knots
Rate of climb: 3200 feet/minute
Fully certificated aerobatic g-limits: +10g to -10g
Wing span: 7.5 metres (24.6 feet)
Wing area: 10.4 square metres (112 square feet

Mike’s Extra 330SC is designed after its full-size counterpart by the company Krill. The airframe is fully
composite, comprised largely of carbon fibre. The design has been tweeked in order to cope with
demanding 3D manoeuvres which are now the norm for model freestyle flying. The wing planform
copies the full-size, however the model features much larger ailerons both in chord and span. It also
uses a significantly different aerofoil section. The leading edge is much sharper than full-size and this
gives a much cleaner break into post-stall manoeuvres like the harrier.
One of the reasons Mike can do manoeuvres like the harrier (a deceleration in level flight into ultra-high
angle of attack beyond 45 degrees) is because the model flies with much lower wing loading than full
scale, which makes the 41% machine incredibly forgiving and allows Mike to get away with things that
Chris can’t. It also results in a very impressive thrust to weight ratio of roughly 2.5:1, which in turn
allows the model to prop-hang at between 30% and 50% throttle. Full power results in an impressive
acceleration out of the prop-hang and vertical lines can be extended indefinitely or until out of sight.
Power is provided by a 175cc flat twin two-stroke MVVS petrol engine, where each cylinder feeds into
its own tuned exhaust canister system. This not only controls engine noise but also provides more linear
throttling characteristics. In order to perform extreme 3D manoeuvres the control surfaces have around
60 degrees of available movement and are fully utilised when 3D rates are on.
Freestyle flying isn’t just full-on 3D, it also incorporates smooth aerobatics at which the model also
excels. There are, however, some manoeuvres which the full-size can perform that the model can’t
replicate – mainly any manoeuvre which requires large amounts of gyroscopic force. With a lightweight
carbon-fibre prop and lower inertia, the gyroscopic effect on the model is drastically reduced.
Overall the 41% scale Extra is incredibly forgiving – though like any aeroplane there are limits to its flight

41% scale Extra 330 100% Extra 300S 100% Extra 330SC
Length (m) 2.9 6.65 6.7
Wingspan (m) 3.1 7.5 7.5
Wing area (m) 1.7 10.4 9.8
Weight (kg) 17.7 750 700
Power (BHP) 28 300 320
Never-Exceed Speed N/A 220 kts 220 kts
Max Cruise Speed N/A 170 kts 170 kts
Thrust to Weight ratio 2.5:1 0.75:1 0.85:1
Price £6500 IRO £150,000 IRO £300,000
envelope which must be respected.
Comparative facts: Model vs Full Scale
41% scale Extra 330 100% Extra 300S 100% Extra 330S

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FILMED AT THE HEADCORN SOUTHERN RC MODEL AIRCRAFT SHOW AT HEADCORN AERODROME NEAR HEADCORN IN KENT,
TN27 9HX,
ON - 3 - 4 - SEPT - 2022,