Engineering:MIT Chrysalis
| MIT Chrysalis | |
|---|---|
| Role | Human-powered aircraft |
| National origin | United States |
| Manufacturer | Massachusetts Institute of Technology |
| Designer | Bob Parks, Harold Youngren |
| First flight | June 5, 1979 |
| Retired | September, 1979 |
| Number built | 1 |
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.[1] MIT had previously built two HPAs, the BURD and BURD II, both of which were unsuccessful.[2]
Design work began in late 1978, with a 1/8th scale flying model being built to verify aspects of the design.[3] 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.[1] The entire aircraft was covered in transparent Mylar film. The undercarriage had a single, castoring, monowheel.[1] Lateral control was achieved by wing warping, with directional and pitch control being achieved by the all-flying tailfin and tailplane.[1]
Construction of the aircraft took 91 days, and involved 20 people and 3,500 hours of work.[2] It first flew on June 5, 1979, at Hanscom Field airport in Bedford, Massachusetts with designer Harold Youngren piloting the craft.[3] Between then and its dismantling in September, the Chrysalis made a total of 345 flights, with 44 different pilots.[1]
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.[4] The MIT team also built the propeller used by the MacCready Gossamer Albatross.[2]
Specifications
Data from Jane's all the world's aircraft 1981-2,[1] and Popular Mechanics[3]
General characteristics
- Crew: 1
- Length: 39 ft (12 m)
- Wingspan: 72 ft (22 m)
- Wing area: 748 sq ft (69.5 m2)
- Airfoil: Lissaman 7769
- Empty weight: 93 lb (42 kg)
- Gross weight: 213–293 lb (97–133 kg) depending on pilot weight
- Propellers: 2-bladed, 14 ft (4.3 m) diameter
Performance
- Wing loading: 0.28–0.39 lb/sq ft (1.4–1.9 kg/m2) depending on pilot weight
See also
Aircraft of comparable role, configuration and era
- Kohm Lady Godiva
- MacCready Gossamer Albatross
- MacCready Gossamer Condor
- MIT BURD
- MIT BURD II
- MIT Monarch A
- MIT Daedalus
Related lists
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Jane's all the world's aircraft 1981-82. London: Jane's Yearbooks. 1981. pp. 413–414. ISBN 0710607296. https://archive.org/details/janesallworldsai8182tayl/page/413/mode/2up. Retrieved April 1, 2023.
- ↑ 2.0 2.1 2.2 M.L. (August–September 1979). "Chrysalis, Human-Powered Airplane: It Flew the First Time Out!". MIT Technology Review (Cambridge, MA, USA: Massachusetts Institute of Technology) 81 (8): A2–A7. ISSN 0040-1692. https://archive.org/details/MIT-Technology-Review-1979-08/page/n48/mode/1up. Retrieved April 1, 2023.
- ↑ 3.0 3.1 3.2 Sahagian, Tom (February 1980). "What it's like to fly the M.I.T. pedal-powered biplane". Popular Mechanics (New York, NY: The Hearst Corporation): 120–121, 172–173. https://books.google.com/books?id=m9UDAAAAMBAJ&dq=mit%20CHRYSALIS%20BIPLANE&pg=PA120. Retrieved April 1, 2023.
- ↑ Larrabee, E.Eugene (July 1980). "The Screw Propeller". Scientific American (New York, NY: Gerard Piel) 243 (1): 134, 135, 137–144, 147, 148. ISSN 0036-8733.
Further reading
- Langford, John (Spring 1981). "Not All Student Design Projects End on Paper: Chronology of the Chrysalis". AIAA Student Journal (New York, NY: American Institute of Aeronautics and Astronautics) 19 (1): 4–13. https://archive.org/details/sim_american-institute-aeronautics-astronautics-student-journal_spring-1981_19_1/page/4/mode/2up. Retrieved April 9, 2023.
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