Mathews PUP
{{Short description|American ultralight aircraft}}
{{Use mdy dates|date=January 2022}}
{{Use American English|date=January 2022}}
| {{Infobox aircraft begin
| name=PUP | image= | caption= }}{{Infobox aircraft type | type=Ultralight aircraft | national origin=United States | manufacturer= | designer=Lyle Mathews | first flight= | introduced=1983 | retired= | status=Plans no longer available | primary user= | more users= | produced= | number built= | developed from= | variants with their own articles= }} |
The Mathews PUP (Perfect Ultralight Plane), also called the P.U.P., is an American ultralight aircraft that was designed by Lyle Mathews in 1983 and made available in the form of plans for amateur construction.Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page E-23. Cybair Limited Publishing, 2001. {{ISBN|0-9680628-1-4}}{{Cite web|url = http://virtualultralightmuseum.com/op.htm#pup |title = P.U.P. (Perfect Ultralight Plane)|accessdate = 29 November 2011|last = Virtual Ultralight Museum|date = n.d.}}
Design and development
The aircraft was designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of {{convert|254|lb|kg|0|abbr=on}}. The aircraft has a standard empty weight of {{convert|248|lb|kg|0|abbr=on}}. It features a biplane wing arrangement, a single-seat, open cockpit, conventional landing gear and a single engine in tractor configuration.
The aircraft is made from aluminum tubing and covered in Dacron sailcloth. Its {{convert|32|ft|m|1|abbr=on}} span, unstaggered wings employ both interplane struts and cable bracing. The lower wing has less span than the upper wing. The fuselage consists of a single aluminum rectangular 2x3 inch (5 X 8 cm) tube. The standard recommended engine is a Kawasaki 440 snowmobile engine that produces {{convert|38|hp|kW|0|abbr=on}} and yields a {{convert|40|mph|km/h|0|abbr=on}} cruise speed along with a rate of climb of 600 feet per minute (3.0 m/s).
Specifications (PUP)
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|wing area sqft=160
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|empty weight lb=248
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|eng1 number=1
|eng1 name=Kawasaki 440
|eng1 type=twin cylinder two-stroke snowmobile engine
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|eng1 hp=38
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|cruise speed mph=40
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|stall speed mph=28
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|climb rate ftmin=600
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References
{{reflist}}
External links
- [http://virtualultralightmuseum.com/op_files/image031.jpg Photo of a PUP]
{{Lyle Mathews aircraft}}