SUMMARY OF IVT TECHNOLOGY

"The Inverted V Tail incorporates twin tail booms which with the wings form a box like structure which is stronger, redundant and more rigid during flight. This box structure also helps prevent personnel contact with a rotating prop on the ground. Further, the pusher engine eliminates turbulence, noise and provides pure undisturbed thrust which is traveling below and out of contact with the IVT thus enabling smoother cruising and better fuel economy. Also, the twin boom and pusher engine features have been proven in developments like the Voyager and White Knight projects," says Joe Gagliano, Co-Founder Advanced Aero.

The IVT Aircraft offers many advantages:

• Commercial
• Structural and Safety
• Performance

Commercial

• Unlimited engine flexibility, the basic wing-tail design allows for a variety of engine installation options: tractor, pusher or tandem.
• V-Tail aircraft have fewer parts to design, tool, fabricate and maintain.
• The outward appearance has a modern new look while the cabin will be very quiet due to the fact the propeller and exhaust are well aft of the passenger compartment.
• When applying takeoff power, unlike conventional aircraft the pilot and passengers will notice there is no tendency for the aircraft to yaw by means of the propeller-induced spiraling slipstream impacting the vertical tail. Like a jet aircraft, all thrust horsepower is converted smoothly into efficient propulsion.

Structural and Safety

• Connecting the triangulated stabilizers reduces bending moments, thus the more rigid tail structure will be lighter than a T-tail or conventional tail design.
• In an approach to landing configuration, unlike the T-tail or conventional horizontal stabilizers, as the angle of attack increases, the angled stabilizers cannot be completely blanketed by the turbulent slipstream generated by the wing or fuselage. Simulation studies have indicated excellent low speed handling qualities.
• With the aft-mounted engine flanked by the twin booms, the likelihood of a serious taxi accident or someone walking into a spinning propeller is virtually eliminated.
• Due to the superior rigidity of the Inverted V-tail and the fact the engine thrust goes between tail surfaces; there will be a reduction in the amount of airframe vibration, thus resulting in an airframe less susceptible to fatigue.
• The superior rigidity of the Inverted V-tail will reduce the risk of tail flutter as is sometimes associated with high-performance aircraft.
• Moving the engine to a central aft location will necessitate moving the wing aft. This will improve pilot visibility, reduce fuel and fuel return lines in the cabin and move both main and auxiliary mounted wing fuel tanks farther aft, away from the cabin.
• Since the fin stabilizers are more rigid, they could be made longer, thus moving the stabilizers away from the turbulent slipstream coming off the back of the fuselage. With the stabilizers now in the undisturbed slipstream, the aircraft's yaw stability at high-speed cruise is enhanced.

Performance

• Triangulating the stabilizers is structurally stronger than conventional tail designs, allowing the aspect ratio (AR) of the stabilizers to be increased. Increased AR is a proven method of reducing drag.
• Unlike conventional tractor type engine installations, mounting the engine(s) within the aft fuselage allows for efficient free-stream airflow over the entire aircraft structure thus improving range, climb and cruise performance.
• As documented by the National Advisory Committee for Aeronautics, Report No. 823, the following advantages can be obtained with a V-tail while maintaining the same stability and control values as a conventional tail assembly:
  • "Less drag because V-tail aircraft have fewer fuselage-tail junctures"
  • "Less tendency toward stabilizer blanketing"
  • "Higher location of tail surfaces tends to reduce elevator deflection required for take-off and landings"
  • "Reduction in the possibility of tail buffeting from the wing and fuselage wakes in high speed aircraft"
  • "Fewer tail surfaces to design and manufacture"

SUMMARY

The Inverted V Tail offers advantages in aircraft performance, flying characteristics, efficiency and cost effectiveness.