eSTOL in AAM
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eSTOL in AAM An Electra Perspective Ben Marchionna Director of Technology & Innovation PRESENTED BY June 24 th , 2021 DATE
Transcript of eSTOL in AAM
eSTOL in AAM An Electra Perspective
Ben MarchionnaDirector of Technology & Innovation
P R E S E N T E D B Y
June 24th, 2021
D A T E
Introducing Electra:The clean, quiet, takeoff-from-anywhere future
No runway needed. Quiet. Sustainable.
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Unique Technology Enables Rooftop Takeoffs and Long RangesHybrid Distributed Electric Propulsion (DEP) with Blown Lift
Distributed electric propulsion with blown lift offers 2.5x more payload than eVTOL with similar rooftop footprint
Batteries provide power to electric motors for energy-efficient cruise and super quiet takeoffs
Turbogenerator for useful range and infrastructure-free battery charging
Blown lift allows very low-speed, rooftop takeoffs (100-ft)
Leadership Team: Proven track record of disruptive aircraft
development, aerospace startup scaling, and successful exits
John LangfordFounder & CEO(Aurora / Boeing)
Jilinda CrowleyCFO
(Rolls-Royce)
Marty BradleySenior Tech Fellow
(Boeing)
Oliver MasefieldChief Engineer(Pilatus, Eclipse)
John HansmanAircraft Certification
(MIT)
Mark DrelaAerodynamics
(MIT)
JP StewartAircraft Development
(Aurora / Boeing)
[1988] Daedalus (human-powered) [1991] PC-12
[1993] Perseus UAS [2002] Eclipse 500
[2009] Excalibur (hybrid-electric) [2014] Orion UAS
[2015] PC-24 [2017] Lightning Strike (sub-scale)
[2018] Odysseus (hybrid-electric solar) [2019] Pegasus PAV
[2019] eSTOL demonstrator (sub-scale) [2020] Porsche UAM
Chris CourtinFlight Physics
(Aurora / MIT)
Diana SiegelStrategy
(Aurora / Boeing)
Ben MarchionnaTechnology & Innovation(Lockheed Martin, SkySpecs)
DEP Makes Blown Lift Practical Again
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Blown Lift STOL Requires:
1. Augmentation of lift over large portions of the wing
2. Effective deflection of the propulsive jet
3. Powered low-speed control
THEN (1960-70s):
Promising, but never reached production due to cost and complexity arising from few, large turbine engines
NOW:
Electric motor-driven propellers enable efficient spanwise jet deflection, robust control, and low maintenance costs with a mechanically simple system
Breuget 941 NASA QSRA Boeing YC-14
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Why Hybrid eSTOL? More payload + much longer ranges.
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Range (nmi)
eSTOL with 45-min reserve
eVTOL(Best Case)
Light Helicopter
Standard Helicopter
Hybrid eSTOL
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Flight time in mins
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Hybrid eSTOL recharges mid-air for extended ranges
Hybrid eSTOL can be operated independent of dedicated infrastructure
Battery State of Charge over 40 mile mission (hybrid eSTOL vs. eVTOL)
Hybrid enables operating from locations without charging infrastructure and turn
around quickly, if needed
Pre-flight & taxi
Takeoff & climb
Cruise climb & cruise
Descent & land
Taxi & shut-down
Battery charging at ~0.5C
Hybrid eSTOL
eVTOL
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Steep takeoffs allow eSTOL operations from urban areasVertical alternatives must flatten quickly to transition onto wing and conserve range
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Horizontal distance in ft
Approach and departure trajectories
19°
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7°
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Box store height: 20 ftTree: 50ft6-story building: 60 ft
Airborne within 100 feet
300-ft total length
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Hybrid eSTOL: Energy Efficient and Super Quiet
Electra eSTOL blends into background
Intolerable
Inaudible
70 dbA(@300 ft during takeoff)
90 dbA
95 dbA
93 dbA
60 dbA
50 dbA
20 dbA
75 dbA
40 dbA(@5,000 ft during cruise)
Electra eSTOL sustainable alternative to personal car
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Personal car, 32mpg
Helicopter
Electra eSTOL
-29%
0.41
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Helicopter
Electra eSTOL
Personal car,ICE, 32mpg
Train
Personal car, BEV, 300Wh/mile, US grid
eVTOL, 300Wh/mile, US grid
-29%
Lb fuel/pax mile for different modes of transportation
GREENHOUSE GAS EMISSIONS IN KGCO2E/PAX MILE, 50/50 SAF BLEND
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eSTOL is ideal for many segments of the AAM ecosystem
On-Demand Urban Mobility Scheduled Service Cargo and Regional Logistics
Military Logistics and Special Missions Medical ServicesVIP Transport
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eVTOL and eSTOL can seamlessly operate from same vertiports
300 x 100 ft
Small vertiport concept(Lilium)
Vertiport concept(Uber)
Dallas “Vertiport”
