500E Posted October 4, 2012 Report Share Posted October 4, 2012 Well never thought it would fly.http://www.pegasusheli.com/ 1 Quote Link to comment Share on other sites More sharing options...
Helipilot PTK Posted October 5, 2012 Report Share Posted October 5, 2012 Thats BA. Quote Link to comment Share on other sites More sharing options...
ridethisbike Posted October 5, 2012 Report Share Posted October 5, 2012 Imagine doing auto's in that... tail-strike-be-gone Quote Link to comment Share on other sites More sharing options...
gary-mike Posted October 5, 2012 Report Share Posted October 5, 2012 Pretty cool, looks like they are trying to reel in some investors and not quite ready for me to try one on though... Hey I can drive a stick shift damn it Quote Link to comment Share on other sites More sharing options...
gary-mike Posted October 5, 2012 Report Share Posted October 5, 2012 Imagine doing auto's in that... tail-strike-be-gone Hmm, I wanna see that video, wonder how it handles? I'm thinking it is a pretty low inertia rotor system. But yeah, no boom to chop or TR to stick in the ground, that's a plus. Rudder pedals in a heli, that should be nice for a dual rated pilot.. less correction by peers and more correction of peers. 1 Quote Link to comment Share on other sites More sharing options...
TomPPL Posted October 5, 2012 Report Share Posted October 5, 2012 Would like to see how the seals perform in dust / rain etc.. Quote Link to comment Share on other sites More sharing options...
500E Posted October 5, 2012 Author Report Share Posted October 5, 2012 gary-mike My felling for a No of years did you read the whole site regarding investment & share dealing ? + $2m investor.Still was wrong about the thing never flying, and it being a SS style thing. Quote Link to comment Share on other sites More sharing options...
gary-mike Posted October 5, 2012 Report Share Posted October 5, 2012 (edited) I did read a few of the news letters they had in there, looks like they have gained some interest but still in the very early stages of getting started. They also said it was going to be cheap, Frank said the same thing. Well I'm an average income American and I still can't afford a R-22 Frank. Edited October 5, 2012 by gary-mike 1 Quote Link to comment Share on other sites More sharing options...
TIPJETHELI Posted October 7, 2012 Report Share Posted October 7, 2012 Hi to all members and website creator. Good website and a good forum.Would love to ask this forum, is it possible to find some one or how to go about finding a designer or a engineer who could help us directing in to right direction on how to design a APJ TipJet or a no torque Rotorcraft like VilJet or Pegasusheli.com. Any help is Appreciated. Thanks my email address is TIPJETHELI@gmail.com Quote Link to comment Share on other sites More sharing options...
ridethisbike Posted October 8, 2012 Report Share Posted October 8, 2012 Ok, lets get some discussion going on this bird. Aerodynamically speaking, what are everyone's thoughts? Seems to me that LTE just went bye bye with this one... Thoughts? Quote Link to comment Share on other sites More sharing options...
rotorwashed Posted October 8, 2012 Report Share Posted October 8, 2012 Actually it would be an extremely high rotor inertia system since its got so much weight at the tips. I wonder how it controls yaw in a hover? Quote Link to comment Share on other sites More sharing options...
Helipilot PTK Posted October 8, 2012 Report Share Posted October 8, 2012 I wonder if it will have a H/V diagram. If its a very high inertia rotor you may be able to autorotate from any speed/altitude combination, thoughts? Also I remember my flight instructor telling me that Bell built an experimental 206L LongRanger with massive weights built into the rotor such that the helicopter had NO low airspeed HV curve. It could autorotate to a safe landing from any combination of altitude and airspeed. I always thought that was interesting. 1 Quote Link to comment Share on other sites More sharing options...
ridethisbike Posted October 8, 2012 Report Share Posted October 8, 2012 I wonder if it will have a H/V diagram. If its a very high inertia rotor you may be able to autorotate from any speed/altitude combination, thoughts? Also I remember my flight instructor telling me that Bell built an experimental 206L LongRanger with massive weights built into the rotor such that the helicopter had NO low airspeed HV curve. It could autorotate to a safe landing from any combination of altitude and airspeed. I always thought that was interesting. That is interesting. Bet they cost a fortune too. I wonder if that was the limiting factor to their production. Actually it would be an extremely high rotor inertia system since its got so much weight at the tips. I wonder how it controls yaw in a hover? It looks as though it has a "rudder" behind the engine that just deflects whatever thrust is produced by the exhaust. Quote Link to comment Share on other sites More sharing options...
Goldy Posted October 10, 2012 Report Share Posted October 10, 2012 Looks pretty stable in a hover, the lack of a tailboom and leverage means better crosswind performance I would guess. Too bad the cameraman has never heard of a tripod.... Quote Link to comment Share on other sites More sharing options...
500E Posted October 11, 2012 Author Report Share Posted October 11, 2012 Some early blurb said no HV curve if I remember correctly Quote Link to comment Share on other sites More sharing options...
500F Posted October 11, 2012 Report Share Posted October 11, 2012 If understand how this think works correctly it uses bypass turbine air or some type of compressed air out of the rotor tips. Neat... you could put a pressure accumulator (bladder) somewhere in the system that if power was lost would give you a few more seconds of thrust before RPM deteration began, that would make all the difference in the world.... 1 Quote Link to comment Share on other sites More sharing options...
iChris Posted October 11, 2012 Report Share Posted October 11, 2012 (edited) Ray Prouty wrote an article on this subject some years ago. Downloadable at the link below, click the green “Download” button at the site. I think the last major effort in Tip-Drive Rotors was the Hughes XV-9A (See Below). Tip-Driven Rotors By Ray Prouty “Two of the most troublesome components in most helicopters are the transmission and the antitorque system. Getting rid of either or both to save weight and development headaches has long challenged helicopter designers. One of the most obvious answers is the tip-driven rotor. This has been tried a number of times; so far without much lasting success There are those who think it should be reconsidered. We can trace the principle back 2,000 years to Heron of Alexandria, who used it to make a steam powered whirligig. By shooting gases out an aft-facing nozzle at the blade tip, a rotor can be made to spin like a rotary lawn sprinkler. A variation of the scheme was first applied to helicopter designs in the 1930s when blade-mounted propellers were used to pull the rotor around. This configuration was also used in the da Vinci, a manpowered helicopter developed by the students at the California Polytechnic University at San Luis Obispo (Figure 3-1). It was not until after World War II, however, that the more direct approach of using jet propulsion in one form or another was developed to an almost successful conclusion.” Download: Tip-Drive Rotors By Ray Prouty Edited October 12, 2012 by iChris Quote Link to comment Share on other sites More sharing options...
peter2001 Posted October 13, 2012 Report Share Posted October 13, 2012 this is really really cool, i thikn someday all helicopters will be like this. I just wonder what happens if the engine stops? Quote Link to comment Share on other sites More sharing options...
Helipilot PTK Posted October 14, 2012 Report Share Posted October 14, 2012 this is really really cool, i thikn someday all helicopters will be like this. I just wonder what happens if the engine stops? You would autorotate like you would in any other helicopter. Like I mentioned before these helicopters are likely to have no H/V curve because of the heavy rotor tips which give it a very high inertia rotor system. Quote Link to comment Share on other sites More sharing options...
500E Posted October 16, 2012 Author Report Share Posted October 16, 2012 http://www.tecaerome...ingles/RH-i.htmA lot of info regarding past tip jet Quote Link to comment Share on other sites More sharing options...
Goldy Posted October 17, 2012 Report Share Posted October 17, 2012 http://www.tecaerome...ingles/RH-i.htmA lot of info regarding past tip jet 86% of fatal helicopter accidents are due to tail rotor failures? huh? Other than that one, there are some cool advantages to this type of tip rocket technology...basically it's a 2 or 3 engine ship depending on the number of rotor blades.. Quote Link to comment Share on other sites More sharing options...
Cineron Posted October 19, 2012 Report Share Posted October 19, 2012 What happened to those two Hugh's 500's that were converted to hydrogen peroxide jet tips? It did seem to solve a lot of problems, I remember they said they were very easy to fly and in the YT videos they could hover hands off. Quote Link to comment Share on other sites More sharing options...
aeroscout Posted October 19, 2012 Report Share Posted October 19, 2012 What happened to those two Hugh's 500's that were converted to hydrogen peroxide jet tips? It did seem to solve a lot of problems, I remember they said they were very easy to fly and in the YT videos they could hover hands off.If you will remember, there was a H2O2 powered jet pack that was all the rage in the late 60's early 70's time frame. Maximum flight time to fuel exhaustion...11 seconds. Endurance has been the bane of H2O2 propulsion designs. Quote Link to comment Share on other sites More sharing options...
lelebebbel Posted October 22, 2012 Report Share Posted October 22, 2012 (edited) this is really really cool, i thikn someday all helicopters will be like this. Unlikely, unless someone finds a way to reduce the ridiculous fuel consumption, and the noise level. Especially the latter will be hard...Essentially, you have two rockets travelling in circles at nearly the speed of sound, creating a noise like you've never heard before. Tip Jets have been around for a long time, but so far every design study was eventually given up. Edited October 22, 2012 by lelebebbel 1 Quote Link to comment Share on other sites More sharing options...
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