HP-18 HP Aircraft, LLC   

General Details
Manufacturer: HP Aircraft, LLC
Plane Name:


Classified as: Unclassified
Country Of Origin: U S A
Designer: R. E. Schreder
No. of Seats 1
No. Built 0
L/DMax: 40
MinSink: 0.55 m/s / 1.8 fps / 1.07 kt


Span Area Empty Weight Payload Gross Weight Wing Load Water Ballast
m ft sq.m sq.ft kg lb. kg lb. kg lb. kg
kg lb.
15 49.2 10.5 113 213 470 227 500 440 970 41.9 8.58 90 200
Aspect ratio: 21.4
Airfoil: Wortmann FX 67-150
Structure: forward fuselage, fiberglass; aft fuselage, metal; wings, all metal with foam ribs

The HP-18 is one of the most successful of all U.S. homebuilt aircraft in terms of number built. The ship has a forward fuselage of fiberglass and a sheet metal rear fuselage. The wing is built up from a metal spar with foam ribs to which the aluminum skin is bonded. This 15 m. racing class ship carries water ballast inside the wing box spar, features flap-aileron coupling and has 90 degree deflecting flaps to permit steeper landing approaches and lower, safer touchdown speeds. The control stick is side-mounted with attached brake handle and trim tab although modifications using a conventional stick have been made. One belongs to the National Soaring Museum.


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