HpH 304 is a family of sailplanes ranging from a single-seat composite15 metre Class to a two-place 20 metre Open Class manufactured by the Czech company HpH Ltd. The sailplane was derived from a glider made by Glasflügel between 1980 and 1982 that was put back in production by HpH and who have modified it substantially and developed new models since.[1]
The 304 was the second and last glider developed by Glasflügel in cooperation with Schempp-Hirth. It superseded the Glasflügel Mosquito.
The principal designer of the 304 was Martin Hansen, known for his role in the design of the Akaflieg Braunschweig SB-11. The glider continued the Glasflügel tradition of innovation: the parallelogram control stick, combined trailing edge flaps and airbrakes, automatic trimming, heel-operated brakes, automatic control connections, the extremely easy assembly of the wings and tailplane, the parallelogram forward-opening canopy and lifting instrument panel are Glasflügel innovations largely copied by other manufacturers.
The prototype flew for the first time in May 1980 and entered production shortly after. Glasflügel was financially struggling at that time, following the untimely death of Eugen Hänle, the founder of the company, in 1975. A partnership with Schempp-Hirth led to a surrender of technology. Lacking investment and an energetic leadership, the company folded in 1982.
A small batch was later built by the Jastreb company in Yugoslavia as the 304B.
The 304 is sometimes referred to as the H-304, which is not correct, as the H applies only to the Glasflügel sailplanes designed principally by Wolfgang Hütter.
Development by HpHedit
The 304 was put back in production by the Czech company HpH Ltd, as the Glasflügel 304CZ. This new production run uses the original Glasflügel moulds and jigs that fortunately were not lost with the demise of the company. The 304CZ was updated with the addition of winglets and a few other changes, and has spawned several derivatives, namely a 17.43 metre span variant 304 CZ-17 and the 15 metre Standard Class 304 C Wasp.
In November 2006, HPH conducted the maiden flight of the completely new 18 metre 304 S Shark. The 304 S Shark features an all new wing design using the HpH xn2 profile with the airfoil only 13.2% of the cord thickness (16.4% at the root). The 18 metre wing yields a best glide of 51:1 and minimum sink of 0.44 m/s (0.85 kt).[2] The new Safety Cockpit uses a Carbon/Kevlar safety shell that meets the latest EASA Safety Standards.[3] The 304 S is larger than the 304 C and while interchangeable wing extensions are available for 15-metre or 18-metre span, the most common configuration is the 18-metre version.
The Shark is available in Self-Launch Versions (Shark MS) using the popular Solo 2625-01 powerplant, or as a sustainer using either a 400 N thrust Jet powerplant or with a Front-Electric-Sustainer (FES) solution. By early 2015 about 50 HPH Shark sailplanes had been produced with about 50% being Self-launchers, the remainder being sustainers of one type or another.
Variantsedit
304
Glasflügel produced.
304 B
Jastreb produced.
304 CZ
HpH produced variant certified in 1998 with a 15 meter span.
304 CZ-17
HpH produced variant certified in 1999 with a 15 meter span and interchangeable winglets and wing extensions to 17.43 meter span.
304 C Wasp
HpH produced variant certified in 2001 with a 15 meter span.
304 Shark
HpH produced variant first flown in 2006 and is an entirely new sailplane with interchangeable winglets for 15-meter or 18-meter span. So far only the 18m version has been produced, driven largely by customer demand. The new 18m wing offers substantially better performance than the original 304. The Shark is one of the first gliders certified to the latest version of CS22 and has a 9g cockpit utilizing Aramid fibers in the forward fuselage and carbon in the rear, except the top of the fin which is Glass so the Radio antenna can work. Virtually all Sharks have some form of motor system. See below.
304 Shark SJ
HpH produced variant with 18-meter span and optional TBS 400N jet engine for self-retrieve.
304 Shark ES
HpH produced variant with 18-meter span and optional front electric sustainer system for self-retrieve.
304 Shark MS
HpH produced variant with 18-meter span and optional Solo 2625 01 motor for self-launch.
304 TS Twin Shark
HpH produced variant with two seats and 20 meter span. The Twin-Shark first flew in July 2017 and initial flying impressions are very favorable indicating that it performs at least as well as the other two latest generation 20m flapped two seaters that are already on the market.
Johnson R H, A Flight Test Evaluation of the 304CZ Sailplane, Soaring, July 2000
Thomas F, Fundamentals of Sailplane Design, College Park Press, 1999
Simons M, Segelflugzeuge 1965–2000, Eqip, 2004
Aero Fridrichshafen
HpH TS
CNC
External linksedit
Website of HpH Ltd
January 01, 1970
this, article, includes, list, general, references, lacks, sufficient, corresponding, inline, citations, please, help, improve, this, article, introducing, more, precise, citations, december, 2012, learn, when, remove, this, message, family, sailplanes, rangin. This article includes a list of general references but it lacks sufficient corresponding inline citations Please help to improve this article by introducing more precise citations December 2012 Learn how and when to remove this message HpH 304 is a family of sailplanes ranging from a single seat composite 15 metre Class to a two place 20 metre Open Class manufactured by the Czech company HpH Ltd The sailplane was derived from a glider made by Glasflugel between 1980 and 1982 that was put back in production by HpH and who have modified it substantially and developed new models since 1 304 Glasflugel 304CZ Role 15 metre class sailplane National origin Germany Manufacturer Glasflugel Designer Martin Hansen First flight May 1980 Number built 65 Contents 1 Development by Glasflugel 2 Development by HpH 3 Variants 4 Specifications HpH 304C 5 Specifications HpH 304S 18m 6 See also 7 References 8 External linksDevelopment by Glasflugel editThe 304 was the second and last glider developed by Glasflugel in cooperation with Schempp Hirth It superseded the Glasflugel Mosquito The principal designer of the 304 was Martin Hansen known for his role in the design of the Akaflieg Braunschweig SB 11 The glider continued the Glasflugel tradition of innovation the parallelogram control stick combined trailing edge flaps and airbrakes automatic trimming heel operated brakes automatic control connections the extremely easy assembly of the wings and tailplane the parallelogram forward opening canopy and lifting instrument panel are Glasflugel innovations largely copied by other manufacturers The prototype flew for the first time in May 1980 and entered production shortly after Glasflugel was financially struggling at that time following the untimely death of Eugen Hanle the founder of the company in 1975 A partnership with Schempp Hirth led to a surrender of technology Lacking investment and an energetic leadership the company folded in 1982 A small batch was later built by the Jastreb company in Yugoslavia as the 304B The 304 is sometimes referred to as the H 304 which is not correct as the H applies only to the Glasflugel sailplanes designed principally by Wolfgang Hutter Development by HpH editThe 304 was put back in production by the Czech company HpH Ltd as the Glasflugel 304CZ This new production run uses the original Glasflugel moulds and jigs that fortunately were not lost with the demise of the company The 304CZ was updated with the addition of winglets and a few other changes and has spawned several derivatives namely a 17 43 metre span variant 304 CZ 17 and the 15 metre Standard Class 304 C Wasp In November 2006 HPH conducted the maiden flight of the completely new 18 metre 304 S Shark The 304 S Shark features an all new wing design using the HpH xn2 profile with the airfoil only 13 2 of the cord thickness 16 4 at the root The 18 metre wing yields a best glide of 51 1 and minimum sink of 0 44 m s 0 85 kt 2 The new Safety Cockpit uses a Carbon Kevlar safety shell that meets the latest EASA Safety Standards 3 The 304 S is larger than the 304 C and while interchangeable wing extensions are available for 15 metre or 18 metre span the most common configuration is the 18 metre version The Shark is available in Self Launch Versions Shark MS using the popular Solo 2625 01 powerplant or as a sustainer using either a 400 N thrust Jet powerplant or with a Front Electric Sustainer FES solution By early 2015 about 50 HPH Shark sailplanes had been produced with about 50 being Self launchers the remainder being sustainers of one type or another Variants edit304 Glasflugel produced 304 B Jastreb produced 304 CZ HpH produced variant certified in 1998 with a 15 meter span 304 CZ 17 HpH produced variant certified in 1999 with a 15 meter span and interchangeable winglets and wing extensions to 17 43 meter span 304 C Wasp HpH produced variant certified in 2001 with a 15 meter span 304 Shark HpH produced variant first flown in 2006 and is an entirely new sailplane with interchangeable winglets for 15 meter or 18 meter span So far only the 18m version has been produced driven largely by customer demand The new 18m wing offers substantially better performance than the original 304 The Shark is one of the first gliders certified to the latest version of CS22 and has a 9g cockpit utilizing Aramid fibers in the forward fuselage and carbon in the rear except the top of the fin which is Glass so the Radio antenna can work Virtually all Sharks have some form of motor system See below 304 Shark SJ HpH produced variant with 18 meter span and optional TBS 400N jet engine for self retrieve 304 Shark ES HpH produced variant with 18 meter span and optional front electric sustainer system for self retrieve 304 Shark MS HpH produced variant with 18 meter span and optional Solo 2625 01 motor for self launch 304 TS Twin Shark HpH produced variant with two seats and 20 meter span The Twin Shark first flew in July 2017 and initial flying impressions are very favorable indicating that it performs at least as well as the other two latest generation 20m flapped two seaters that are already on the market Specifications HpH 304C editGeneral characteristics Crew One pilot Capacity 115 kg 253 lb water ballast Length 6 45 m 21 ft 2 in Wingspan 15 00 m 49 ft 3 in Height 1 36 m 4 ft 6 in Wing area 9 9 m2 106 sq ft Aspect ratio 22 8 Empty weight 235 kg 517 lb Gross weight 450 kg 990 lb Performance Maximum speed 250 km h 160 mph 140 kn Maximum glide ratio 42 7 Rate of sink 0 57 m s 112 ft min Specifications HpH 304S 18m editSource 4 General characteristics Crew One pilot Capacity 250 kg 551 lb 250 litres 66 US gal water ballast Length 6 79 m 22 ft 3 in Wingspan 18 00 m 59 ft 0 in Height 1 48 m 4 ft 10 in Wing area 11 8 m2 127 sq ft Aspect ratio 27 43 Empty weight 280 kg 617 lb Gross weight 600 kg 1 323 lb Performance Maximum speed 280 km h 174 mph 151 kn Maximum glide ratio 51 2 Independently Measured Rate of sink 0 44 m s 82 8 ft min See also editRelated lists List of glidersReferences edit nbsp Wikimedia Commons has media related to Glasflugel 304 HpH Sailplane amp Gliding 19 April May 2007 a href Template Cite journal html title Template Cite journal cite journal a Missing or empty title help HpH Shark Family HpH Shark Technical Specs Johnson R H A Flight Test Evaluation of the 304CZ Sailplane Soaring July 2000 Thomas F Fundamentals of Sailplane Design College Park Press 1999 Simons M Segelflugzeuge 1965 2000 Eqip 2004 Aero Fridrichshafen HpH TS CNCExternal links editWebsite of HpH Ltd Retrieved from https en wikipedia org w index php title HpH 304 amp oldid 1205682673, wikipedia, wiki, book, books, library,
