HP-13 and HP-14 HP Aircraft, LLC   

General Details
Manufacturer: HP Aircraft, LLC
Plane Name:

HP-13 and HP-14

Classified as: Unclassified
Country Of Origin: U S A
Designer: R. E. Schreder
No. of Seats 1
No. Built 0
L/DMax: 39 89 kph / 48kt / 55 mph
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.
16.64 54.6 12.85 138.3 210 464 120 264 330 728 25.68 5.26 0 0
Aspect ratio: 21.6
Airfoil: Wortmann FX 61-163
Structure: All metal

The HP-14 was developed from the HP-13 which was essentially a HP-11 fuselage with the Wortmann airfoil used on the HP-12, with extended span. That wing was later mated to an improved fuselage to become the HP-14. The –14 used lower wing loading and reduced aspect ratio in an attempt to maximize performance in weak conditions. More than 40 of all versions were built in the U.S. and by Slingsby in Great Britain. The ship has appeared with all three tail styles : the original had the Schreder V- tail, Slingsby produced the –14C version with 18 m. wing and conventional tail, and the –14T version used the C wing tieh a T-tail. The Slingsby HP-14C’s are ATC’d. The type features a 90 degree landing flap for approach control, originally operated by a rack and pinion mechanism. The –14C adopted a rechargeable pneumatic system to ease aerodynamic operating loads at high speed. Specifications in parenthesis are for the HP-14T. As with many homebuilts, a number of builders have made design changes to their ships. In some cases these have been substantial. Andre Krutchkoff built his SHP-1 with his own design of fuselage with T-tail. Paul Bikle produced a modified –14 (the T-6) with a 17.37 m./ 57 ft. span wing and control system modifications. Otto Zauner constructed an 18 m. model (called the Zauner OZ- 4) which has been modified substantially to have tip extensions with winglets to give a span of 19.2 m. / 63 ft, and a gross weight of 386 kg./ 850 lb.


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