Friday, 18 November 2016

Honda HA-420 HondaJet

The Honda HA-420 HondaJet is the first aircraft developed by Honda Aircraft Company. The light business jet was designed in Japan and then developed and manufactured in Greensboro, North Carolina in the United States.


The HondaJet is a low-wing monoplane with a conventional structure, it has a mainly composite fuselage and an aluminium wing. The aircraft is powered by two GE Honda Aero Engines HF-120 turbofans mounted on pylons above the wing. It has a retractable tricycle landing gear with both single wheeled main and nose landing gear.


Several aircraft with overwing podded engines have been tested, for various reasons. The configuration has been used on seaplanes, such as the Dornier Do X from 1929 and the modern jet-engined Beriev Be-200. It was also used on the VFW-Fokker 614, a 44-seat German jet airliner, in the early 1970s. The VFW-614 was designed for eliminating ingestion problems and weight. Others include NASA's Quiet Short-Haul Research Aircraft around 1980 and the Scaled Composites Triumph 8-place business jet in 1988.

The HondaJet’s overwing engine mount configuration was designed to maximize cabin space, and achieve lower wave drag at a high Mach number. The nose and wing are designed for laminar flow, and the main fuselage has a constant profile, making an eventual stretch easier. The combination of engine placement, wing and fuselage was achieved using computer simulations and wind tunnels. Honda claims that the combination of lightweight materials, aerodynamics and efficient engines gives the HondaJet up to 20% better fuel efficiency than similar aircraft.

Honda began developing its own small turbofan engine, the HF118, in 1999. This led to the HF120, developed with GE Aviation under the GE-Honda partnership. The HF120 was test-flown on a Cessna Citation CJ1. The engine features a single fan, a two-stage compressor and a two-stage turbine. The GE Honda HF120 received FAA type certification on 13 December 2013, and production certification in 2015.


The passenger area is 5.43 m (17.80 ft) long and has an enclosed lavatory. The semi-round cabin is 12.1 ft long, 1.52 m (5.00 ft) wide, and 1.46 m (4.80 ft) high.



The aircraft is equipped with a touchscreen 3-display Garmin G3000 glass cockpit system (i.e. most of the cockpit readouts are presented on flat-panel displays).

Fingertip Control Meets Integrated Flight Deck
  • ·         Advanced flight deck for light turbine jets
  • ·         Bright high-resolution displays with SVT™ let you see clearly even in IFR conditions
  • ·         Displays divide into 2 pages to help display multiple systems and sensors
  • ·         Intuitive touchscreen interface with shallow menus and audible feedback
  • ·         Automatic Flight Guidance and Control Systems
  • ·         Weather, charts, traffic, terrain and Global connectivity options


With the GE Honda HF120 turbo-fan engines, the startup sequence was simple and automatic… Just push a button to initiate the start sequence, then move the thrust levers to the idle position. The system monitors the starting sequence for any abnormalities. This is as simple as it gets.


Cruise Speed Control


This is a new button on the Garmin autopilot that I had not seen before. It does exactly what it sounds like… It’s cruise control for the cruise phase of flight. Apparently, it holds a selected speed while in the ALT (altitude hold) mode within 5% of the selected N1 setting. It’s not a complete auto-thrust system, but it should help eliminate repetitive manual thrust adjustments in cruise.

Speed brakes

On most airplanes the speed brakes are mounted on the wings and tend to be noisy. The HondaJet is the first plane I have seen with speed brakes mounted on the tail. This unique arrangement results in very little noise or vibration when activated.


Landing gear


Fujino received the 2014 International Council of the Aeronautical Sciences award for the design as well as an Aviation Industry Leader of the Year Award.

In 2014, the aircraft was awarded a 'Best of What's New' title by Popular Science magazine.

These graphs are designed to illustrate the performance of HondaJet under a variety of range, payload, speed and density altitude conditions. Do not use these data for flight planning purposes because they are gross approximations of actual aircraft performance.

Time and Fuel Versus Distance

This graph shows the relationship distance flown, block time and fuel consumption. HondaJet has an average long-range cruise speed of about 354 KTAS that yields about 8% better fuel efficiency than cruising at an average 396 KTAS cruise speed. HondaJet’s 7,279 lb. quoted single-pilot BOW is not representative of a typically equipped aircraft with four club seats in the main cabin, a single right-hand, side-facing seat across the entry door and popular options. The two aircraft we flew for this report had 7,500+ lb. single-pilot BOWs.

Specific Range (Mid-Range Weight, ISA) This graph shows the relationship between cruise speed and fuel consumption for Hondajet at representative cruise altitudes for 9,000 lb., mid-weight aircraft. Based upon our two flights in the aircraft, we believe these data to be accurate.

Range/Payload Profile The purpose of this graph is to provide simulations of various trips under a variety of payload and two airport density altitude conditions, with the goal of flying the longest distance at long-range cruise. Each of the six payload/range lines was plotted from multiple data points, ending at the maximum range for each payload condition. The time and fuel burn dashed lines are based upon long-cruise data taken from the Time and Fuel versus Distance graph. Runway distances for sea-level standard day and for BCA’s 5,000 foot elevation, ISA+20C airport accompany the takeoff weights, using the optimum flap configuration in light of FAR Part 23 Commuter Category runway and second-segment OEI climb performance requirements.


GE Honda HF120

Wide-chord blisk-type fan


Engine Type:
GE-Honda HF-120 turbofan
Number of Engines:
Max Takeoff Distance:
3,120 ft.
Max Landing Distance:
2,500 ft.
Cabin Volume:
Cabin Height:
4 ft. 9.4"
Cabin Width:
5 ft.
Cabin Length:
17 ft. 8" in.
Baggage Volume:
64 cu. ft.
External Length:
41 ft. 7 in.
External Height:
13 ft. 2 in.
External Wing Span:
39 ft. 9 in.
External Wing Span:
39 ft. 9 in.
Payload Max Takeoff:
Payload Max Landing:
Payload Max Operating:

Jet Type:
Very Light Jets
Honda Aircraft Company
$3.65 M
Max Cruise Speed:
420 MPH
Maximum Mach Operation:
Max Pax:
Max Range:
1,180 nm
Max Altitude:
43,000 ft
est. 2009
Base Aircraft:
Current Order:

Technical data