MIT Chrysalis
{{Short description|1970s United States human-powered aircraft}}
{{DISPLAYTITLE:MIT Chrysalis}}
{{Use mdy dates|date=March 2023}}
{{Use American English|date=March 2023}}
| {{Infobox aircraft begin
|name =MIT Chrysalis |image = |caption = }} {{Infobox aircraft type |type = Human-powered aircraft |national origin =United States |manufacturer =Massachusetts Institute of Technology |designer =Bob Parks, Harold Youngren |first flight =June 5, 1979 |introduction = |retired =September, 1979 |status = |primary user = |more users = |produced = |number built =1 |program cost = |unit cost = |developed from = |variants with their own articles = }} |
The Chrysalis was a human-powered biplane, designed and built by graduates and undergraduates of the Massachusetts Institute of Technology, with Professor Eugene Larabee acting as Project Adviser. MIT had previously built two HPAs, the BURD and BURD II, both of which were unsuccessful.
Design work began in late 1978, with a 1/8th scale flying model being built to verify aspects of the design.
The Chrysalis was a biplane of conventional configuration, fitted with a tractor propeller. The biplane's wire-braced wings were unstaggered, and the outboard panels of the lower wing were set with a 6° dihedral. The fuselage was of the pod-and-boom type. The aircraft had a primary structure of aluminum tubing, and a secondary structure made of styrofoam, balsa, and carbon fibre. The entire aircraft was covered in transparent Mylar film. The undercarriage had a single, castoring, monowheel. Lateral control was achieved by wing warping, with directional and pitch control being achieved by the all-flying tailfin and tailplane.
Construction of the aircraft took 91 days, and involved 20 people and 3,500 hours of work. It first flew on June 5, 1979, at Hanscom Field airport in Bedford, Massachusetts with designer Harold Youngren piloting the craft. Between then and its dismantling in September, the Chrysalis made a total of 345 flights, with 44 different pilots.
The Chrysalis was notable for being the first aircraft to use a 'minimum induced loss' propeller, the design of which was based on the work of Professor Eugene Larrabee. The MIT team also built the propeller used by the MacCready Gossamer Albatross.
Specifications
{{Aircraft specs|ref=Jane's all the world's aircraft 1981-2, and Popular Mechanics
|prime units?=imp
|crew=1
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|length m=
|length ft=39
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|span ft=72
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|wing area sqft=748
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|airfoil=Lissaman 7769
|empty weight kg=
|empty weight lb=93
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|gross weight lb=213-293
|gross weight note=depending on pilot weight
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|eng1 number=1
|eng1 name=
|eng1 type=Cyclist pilot
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|eng1 hp=0.4
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|wing loading lb/sqft=0.28-0.39
|wing loading note=depending on pilot weight
|prop blade number=2
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|prop dia m=
|prop dia ft=14
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}}
See also
{{aircontent
|see also=
|related=
|similar aircraft=
- Kohm Lady Godiva
- MacCready Gossamer Albatross
- MacCready Gossamer Condor
- MIT BURD
- MIT BURD II
- MIT Monarch A
- MIT Daedalus
|sequence=
|lists=
}}
References
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}}
=Further reading=
{{refbegin}}
- {{cite magazine|last=Langford |first=John| date=Spring 1981| title=Not All Student Design Projects End on Paper: Chronology of the Chrysalis|magazine=AIAA Student Journal |location=New York, NY| publisher=American Institute of Aeronautics and Astronautics|volume=19 |number=1|pages=4–13|url=https://archive.org/details/sim_american-institute-aeronautics-astronautics-student-journal_spring-1981_19_1/page/4/mode/2up|access-date=April 9, 2023}}
{{refend}}
Category:Human-powered aircraft
Category:Single-engined tractor aircraft
Category:1970s United States experimental aircraft