UPDATE 9/16/11: The 72" Extra 330 SC V2 is in production. Expected delivery is Late 2011. Building on the success of the V1, V2 has several changes in structure and spec. to improve building and flying. External appearance and aerodynamics are unchanged. The 72" V2 is rated for up to 3000W of electric power and 10S Lipo or up to 38CC gas with tuned pipe. More details to come. Thanks, 3DHS staff.
72" Extra 330SC"
The 72 Extra, developed by Scott Stoops, is a model of the latest, greatest world-championship class full-scale Extra. It delivers that same performance in the very convenient 25% size. This design is extremely precise, featuring a long tail for very smooth aerobatic performance. The SC is tuned for extremely low knife-edge coupling, making knife-edge maneuvers easy and fun, even the last quarter of a knife-edge loop.
The 72 Extra easily accepts electric power or 28-36CC gas power. A canister tunnel is included along with mounts for a 30CC-sized canister, a 30CC-sized carbon tuned pipe will also fit in the fuselage. For electric power, 6S 5000mah or 8S 4000mah is recommended for 1800-2200W total. A castle BEC Pro is highly recommended
Setup for both videos above: DLE-30 engine with canister exhaust, 20x6 prop.
The Extra uses 4 full size metal gear servos, plus a throttle servo if needed. A second elevator servo may also be installed to balance a very heavy gasoline engine. All ball-link hardware is included, along with carbon landing gear attached to a fiberglass/carbon reinforced plate, wing bags, genuine ultracote covering, carbon wing tube, locking hatch latch, carbon-reinforced fuselage, aluminum axles, carbon tail wheel, and more.
 Download the 72" Extra 330 SC Manual Here (Right-Click > 'Save As')
For gas power, the 72" Extra is set up for the DLE-30 engine, and includes a firewall-drilling template for that engine and uses the standoffs included with the latest version of the DLE-30 engine. If you are not using a DLE-30, you will have to supply the correct length standoffs and drill your firewall accordingly for your particular engine.
We recommend the DLE-30 Rear-Carb engine for this aircraft, with a 20x6 (or Vess 19A or 20A) prop.
The 72" Extra includes a generic fuel tank, but the American-made Fortitude Fuel Tank is the best in the world and is a highly recommended upgrade.
Specs:
Wingspan: 72"
Length: 69"
Wing Area: 1000 Sq. Inches
Weight: 9.5-11 lbs.
Required Equipment
Engine:
25-35CC Gas (DLE-30 Recommended)
1.80-2.10 Glow (Mount not included in kit)
Gas Prop:
20x6 Xoar Sword
Vess Aero 19A
Vess Aero 20A
Fuel dot or Fuel filler
Fuel line
Electric Motor:
Hacker A50-12L with 6S 5000-5800mah 19x10 or 20x10 prop
Hacker A50-12L with 8S 3500-4400mah 17x8 or 18x8 prop
Hacker A50-14L with 8S 3500-4400mah 18x8 or 19x8 prop
ESC:
Castle ICE 100
Castle Phoenix HV-85
Hacker X75 OPTO
...with all of these, a Castle BEC PRO is recommended.
Servos:
QTY 4 Hitec HS-985MG (Good)
QTY 4 Hitec HS-7985MG (Better)
QTY 4 Hitec HS-7955TG (Best)
QTY 1 standard throttle servo if needed. NOTE: Mini-servos have a short life span as throttle servos in this application, use with caution.
Extensions:
QTY 2 24" Elevator and Rudder
QTY 2 12" Ailerons
QTY 2 4-6" Ailerons (receiver side)
QTY 1 18" Throttle servo
Spinner:
3.0"
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