No tail rotor, no tail boom, no H-V worries...Pegasus helicopter
Have been watching this for a while, and it won't seem to go away...
Pegasus has developed a safe, low-cost, easy-to-fly two-seater helicopter based on breakthrough pressure jet technology that significantly reduces the number of parts used compared to a conventional helicopter. Most notably it has no tail rotor, therefore no tail rotor gear box, tail rotor drive or tail boom. Likewise, it has no main rotor drive system or complex transmission for the main rotor. As a result of these simplifications, Pegasus believes its PH-200PJ is dramatically easier to operate - and safer - than conventional designs.
It is unlikely they will ever attempt to get certification. The minimum cost to get any aircraft certified is in excess of $100 million - the Eclipse jet (which is merely a new type of proven design) has already gone through over $500 million). He'd be better off to either keep it as a kit or sell the idea to a major company.
The thing that's puzzling me is how does pressure tip technology remove the H/V curve? Whatever the means of driving them, the blades must slow when the drive is taken away. There has to be a certain time taken to enter autorotation. Do the tubes running down the blades mean they've got so much inertia that the pilot would have to have the reaction times of a zombie to fatally lose RPM?
There's a list of reasons given as "Why pressure tip technology". How are some of the advantages stated due to pressure tip technology? For example, why would that make it more stable/easier to control? Or give it more payload? or more speed? (Would this be because of the missing gearboxes and running gear for the TR?) Presumably the no icing claim is because it's less susceptible to icing due to the gasses running down the blades. And as for less noise I thought tip jets howled like Banshees.
No tail with which to knock taxiway lights over! Materials technology will probably make this possible for bigger machines in a few years. I would have thought the weight of blades able to contain a spar and jet system would do interesting things with rotor head forces for large helicopters.
I think with a little bit of know how, we could possibly build a "Biggie" possible based in London to fly say 20 or 30 people across to Paris, have a day out and fly back to central London,...... Didn't BEA try this in the late 50'S with the Fairy Rotodyne, perhaps seal technology and power to weight ratios are far superior to those days, but what would it cost, could this so called revolution can the V22 Osprey?
Let me know if you find him, last time I saw him was about 1987, and he was apparently asked to air test a Djinn by the CAA after a rebuild!!, because he was the last certified pilot!!, dont know if he ever did, or if it was a pub story in the bar at Aberdeen airport after a two week tour on the Treasure Finder.