![]() 230000001681 protective Effects 0.000 claims description 2. ![]() 239000002984 plastic foam Substances 0.000 claims description 2.239000006260 foam Substances 0.000 title claims abstract description 6.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Stefan Wode filed Critical Stefan Wode Priority to DE19893914469 priority Critical patent/DE3914469A1/en Publication of DE3914469A1 publication Critical patent/DE3914469A1/en Status Withdrawn legal-status Critical Current Links Inventor Stefan Wode Original Assignee Stefan Wode Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Withdrawn Application number DE19893914469 Other languages German ( de) Google Patents Guard ring for propeller of motorised hang glider - has circumferential groove filled with plastics foam Google Patents DE3914469A1 - Guard ring for propeller of motorised hang glider - has circumferential groove filled with plastics foam The same inspector looked over Skyhook a very short time and spent most of his time explaining to members a growing crowd that the things actually fly.DE3914469A1 - Guard ring for propeller of motorised hang glider - has circumferential groove filled with plastics foam The FAA inspector who first saw the Paraplane inspected it with a bit of skepticism, and possibly approved with the attitude that "It'l never get off the ground". The craft took off, flew, and landed at very near 30mph. Airframe construction was bolted 6061-T6 aluminum thin wall tube, with 6061 T-6 extruded angle. The engine was electric start, and the craft had fiberglass composite spring landing gear. It was powered by a 17hp at 5000rpm single cylinder JLO L297 two stroke engine, driving a composite propeller designed and built by this designer, via a 2.1/1 reduction gearbox. The second craft, Skyhook, in spite of its early date of origin, had most of the attributes of a modern ultralight, except it used a single cylinder snowmobile engine, as the twins were not available at the early date. The designer went on to build two additional craft of this nature, no plans are to be drawn for these craft. A plastic kitchen chair was used for the seat and the engines were started from the seat using recoil starters. The craft spring landing gear was polyester fiberglass over balsa construction. The primary frame structure was 2in sq architectural sections, with the 17 foot long main spars and spreader made from bolted 6061-T6 aluminum tubing. This machine, once committed to landing, simply did not want to climb out before touching down! One time someone walked out onto the middle of the runway as the craft was coming in, to photograph as it came in, leaving the only option to land in the 'glades next to the runway. With a rate of climb with the two blade propellers of only 60 feet per minute, the craft, though very docile in handling, took careful power management when flying at low levels. The craft, which had a 26.5 foot wingspan and weighed 145# empty with a 180# payload, originally started out with 32in diameter 1 blade propellers, with counterweights and flapping hinges, but one of these units tossed itself out of the test zone and made the designer go conservative. The craft took off, flew, and landed at very near to 25mph. "Paraplane" used two West Bend (Chrysler) 820 engines (8hp reduced to 4700rpm maybe 6.5hp for a total of 13hp, for propeller matching reasons) direct driving a pair of two blade 27in diameter polyester fiberglass over balsa propellers. Completed in March of 1967, This is possibly the earliest example of a trike. ![]()
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