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| Mr Yanagisawa, whose nickname is "Gen", developed a small, but comparatively high-powered, horizontally opposed two-cylinder engine while working for the Zenoa company. By 1985, this had been tested in a hang-glider, para-glider and model aircraft, but failed to find a market. Tests of a coaxial rotor RPV in 1987 were unsuccessful because of control problems, while a manned twin-engined design in 1992 failed to produce sufficient lift. By 1994, however, this had evolved into the BDH-1 (Boy's Dream Helicopter 1), exhibited at that year's Japan Aerospace Show. A three-engined BDH-2 followed in 1996 and was further modified as the BDH-3 which, although successful, was unable to sustain height with one engine inoperative. The BDH-4 was shown at AirVenture, Oshkosh, USA, in 1997 and continues to be refined. Manufacture is by ESCO, a general engineering company headed by Mr Yanagisawa, which has produced over 400 types of equipment since being founded in 1971. The assistance of a US agent was enlisted to collaborate on H-4 trials, such as ballistic parachutes and high-speed cruising, which are prohibited by Japanese air law.
YANAGISAWA GEN H-4
TYPE: Exoskelitor flying vehicle.
PROGRAMME: Four-engined development of BDH-3; basic version shown at AirVenture, Oshkosh, 1997; yaw control by small, electrically powered, auxiliary propellers; by 1998, yaw accomplished by differentiation of rotor rpm. Current configuration first flew in 1999. Marketed in kit form.
CURRENT VERSIONS:
H-4: As described.
H-4 UAV: Radio-controlled version, first flown 22 March 2002.
COSTS: Kit US$50,000 (2002).
DESIGN FEATURES: "Strap-on" personal helicopter with contrarotating twin blades of tapered planform and fixed pitch (thus no autorotation capability - replaced by ballistic parachute, if desired). Seat, with fuel tank at rear supported by triangular tube framework landing gear and footrest. Gimballed platform above occupant's head houses four small motors, central transmission and rotor assembly with gears. Combined hand-grip control column and instrument panel attached to front of platform. Rotor speed 800 to 900 rpm. Quoted build time 40 hours.
FLYING CONTROLS: Two-axis control by tilting of engine/rotor platform; yaw control effected by thumb switch on instrument panel, operating electric motor which differentiates speed of rotors by 1%.
STRUCTURE: Framework of 5cm aluminium tube; glass fibre seat and backpack; rotors of carbon fibre and Kevlar, with foam core.
LANDING GEAR: Four small "wheels" each comprise multiple rollers in circular arrangement.
POWER PLANT: Four 124cc Gen 125 two-stroke, horizontally opposed, two-cylinder piston engines with independent ignition, positioned symmetrically on pivoting platform, each developing 7.5kW at 8,500 rpm. Fuel, of 30:1 petrol and oil premix, in seatback tank, capacity up to maximum of 19 litres. Jane's All the World's Aircraft, 2004-2005
Technical data for Gen H-4
Rotor diameter: 4.00m,
max take-off weight: 220kg,
empty weight: 70kg,
never-exceed speed: 90km/h,
cruising speed: 80km/h,
service ceiling: 3000m,
endurance: 1h
| Satyam.A, satyamalagurty(@)yahoo.in, 25.11.2008 I was really interested in your gadget.Could you send your information | | Laxmi narayanha.A, jaivirat(@)yahoo.com, 25.11.2008 I am interested in H-4. pl send the details of H-4 like price, purchase process, shipment, details of the fuel, etc, i am in INDIA | | Nando Gorsatt, gorsatt(@)gmx.net, 15.11.2008 Saw this little wonder on the news this week in Europe. Any distis over here yet? If not... any plans? When?
Thank you & Kind Regards,
Nando | | Australian Distribution?, nigel.leith(@)gmail.com, 03.11.2008 I'd like to know about buying 1 of these - and distributing the units in Australia - is there ANY one at Gen or Ace actually trying to sell these units ??? | | Mason Latham, mlatham9955(@)yahoo.com, 13.10.2008 I am interested in the Gen H-4 because I saw it on a science chanel on tv. I live in Texas of the U.S. is there any way that i can purchase this vehicle... and if so what is the current price (date:October 12, 2008) please send me information on where to buy and how to contact someone about it. Thankyou. will u send me informations regarding purchase h-4. Also reach me at mlatham@gmail.com or phone number (214)681-2123 | | Mason Latham, mlatham9955(@)yahoo.com, 13.10.2008 I am interested in the Gen H-4 because I saw it on a science chanel on tv. I live in Texas of the U.S. is there any way that i can purchase this vehicle... and if so what is the current price (date:October 12, 2008) please send me information on where to buy and how to contact someone about it. Thankyou. will u send me informations regarding purchase h-4 | | Jim Campbell, spooky2018(@)hotmail.com, 09.10.2008 All the blogs/websites I viewed said the H-4 was available for roughly $35,000 in the US but the Ace Craft website has it listed for $59,000. Does anybody know if the price will ever drop or will it continue to rise? I can't believe the cost of manufacturing would have doubled the purchase price! | | breezo, breezotoo[(@)]yahoo.com, 12.09.2008 I saw this at Oshkosh and Sun and Fun in the late 1990's and early 2000's then I haven't seen it again. The possibilities for a craft like this are endless! Pity it never saw manufacture on a larger scale. The competitors in this market seem to have more savvy. Not necessarily a better machine! | | Graeme Nichol, graeme[(@)]gen-corp.jp, 05.09.2008 We are looking at developing a business around this helicopter in the USA. Nothing is finalized, that includes pricing. These increased due to raw material prices.
There is interest from various government and non government security organizations both nationally and internationally. If this market plays out the market for individuals will be resolved.
Then we'll have a really fun helo for playing with available!
Graeme | | Informant, no1(@)home.com, 04.09.2008 The Gen H-4 is available for sale at www.acecraftusa.com
It is $59,500 | | MEXICO WANTS GEN H-4, grupoyanez(@)yahoo.com.mx, 13.08.2008 I WANT TO BE YOUR DEALER IN MYCONUTRY PLEASE CONTACT | | MEXICO, grupoyanez(@)yahoo.com.mx, 13.08.2008 Soy dueño de una empresa en mexico, quiero ser su distribuidor en mi pais, porfavor contactenme, gracias | | Julio Yañez, grupoyanez(@)yahoo.com.mx, 13.08.2008 i want to buy one of yours gen h-4 , how much is it? Do you have a dealer in mexico? if you dont, can i be? please contact me | | Julio Yañez, grupoyanez(@)yahoo.com.mx, 13.08.2008 Please, i am very very very interesting in buy one gen h-4, a cant email dealer, send me anfo where can i buy it | | Len, lenver(@)hotmail.com, 09.08.2008 Does anyone have a good drawing of a hellicopter co-axial bell houseing hub assy. or know were i can get one? | | Steffen M P, smpoulsen(@)gmail.com, 12.06.2008 NOISE Could you please publish the results of your noise-measurements? | | Abdullah salem, Abdullah310(@)yahoo.com, 07.06.2008 Please send on were to buy | | thorsten, thorsten.montag(@)arcor.de, 31.05.2008 please let me know, if there is a distributor in europe or in the us | | nick, nicksauto(@)hotmail.com, 29.05.2008 two questions, first does this aircraft AUTO ROTATE? and is there a dealer in the USA? Let me know | | Roger, rogimusmaximus(@)husmail.com., 16.05.2008 I'm interested in the personal flying helicopter, please send me info. | | Roger, krish, 16.05.2008 I'minterested in the personal flying helicopter, please send me info. My email is rogimusmaximus@husmail.com. | | Roger, krish, 16.05.2008 I'minterested in the personal flying helicopter, please send me info. | | krish, k10krisheyewear(@)yahoo.co.in, 15.05.2008 I am interested in GEN H-4.Please send me information & cost. | | satya, satyaejs2002(@)yahoomail.com, 14.05.2008 dear sir is it available for india. what are the legal formalities in india | | ankur, aankursingh(@)gmail.com, 05.05.2008 dear sir is it available for india. what are the legal formalities in india | | lucky, lucky(@)cybermedia.co.za, 09.04.2008 more info please!! | | robert johnston, valjr67(@)hotmail.com, 17.03.2008 are plans available and at what cost. | | shaun anderson, shaunieboy1(@)hotmail.com, 08.10.2007 does anyone know where we can buy these????? there seems to be alot on the net but its all pre 2006. | | Miodrag, mikipglider(@)yahoo.com, 10.09.2007 Hallo from Serbia. I love flying and this is best flying machine I see yet.Please send me picture of any future flying machine when you built. Best regards from Serbia. | | Valentin, Salsk7(@)Yandex.ru, 05.08.2007 Steve Magnuson
Hello from Ukraine. There is the project of rantsevogo helicopter and engine to him. One problem, there is no possibility to build. | | Steve Magnuson, sjmag(@)earthlink.net, 01.08.2007 Interested in test flying for ballistic chute operation. Have extensive sky-diving experience and some helicopter flying. Also want partnership for new design [ultralight] so I can build and test fly prototype. Send a reply soon I already have many interested buyer prospects. My design is compleetly different from anything out there right now and Im pumped. Steve. | | Steve Magnuson, sjmag(@)earthlink.net, 01.08.2007 Interested in test flying for ballistic chute operation. Have extensive sky-diving experience and some helicopter flying. Also want partnership for new design [ultralight] so I can build and test fly prototype. Send a reply soon I already have many interested buyer prospects. My design is compleetly different from anything out there right now and Im pumped. Steve. | | Mike Clinton, reservenational(@)aol.com, 13.07.2007 I am very interested in purchasing one of these. Cost? I live at 6500 feet elevation - is that a problem? Any details are appreciated.
-MC | | Alsu, alsu2005(@)inbox.ru, 04.06.2007 I was really interested in your gadget.Could you send your information about price,terms and possibilities of purchase.And if it is possible,to test it. Russia,Ufa. | | dean, deh.silverdragon(@)gmail.com, 30.05.2007 what are the max specs for the genh4 and how is it contolled???? | | ted gallia, ponyycar1(@)sbcglobal.net, 26.04.2007 email more pic's and a price and data on flying.i there one built and reddy to fly for sale???? | | Rob Rijsdijk, robrijsdijk(@)casema.nl, 25.04.2007 Please tell me what de price kost
Because i serieusly want to bey this Helicopter | | vipin, vipin4u2(@)rediffmail.com, 22.03.2007 will u send me informations regarding purchase h-4 | | vipin, vipin4u2(@)rediffmail.com, 22.03.2007 will u send me informations regarding purchase h-4 | | narendra, narendradivekar(@)yahoo.com, 07.03.2007 it add a new meaning to the concept of flight. as a rotarw wing pilot i would love to know about this great machins please | | srinivasraju, lakamrajusr_4(@)rediffmail.com, 07.03.2007 I am interested in H-4. pl send the details of H-4 like price, purchase process, shipment, details of the fuel, etc, i am in INDIA (Asia) | | bmeerfeld, abaz(@)cox.net, 11.02.2007 Please send information on GEN H-4.Does it come in kit form or prebuilt? Thanks! | | marty, marty40(@)comcast.net, 30.12.2006 please send information on were to buy | | Jose Romo, joseromo2(@)hotmail.com, 04.12.2006 Ia am interested in the Gen h- 4. Is it already for sale, and where? Price? Training ?
Thank You | | ekrieger2000@yahoo.com, 25.11.2006 I am interested in gen h-4. Is it for sale too? Please send me price and some more information. Egon |
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