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Harrier test flights begin
Here are a few videos for you guys to look over, its seems like there's still a long way to go but I think it all looks promising. http://www.youtube.com/watch?v=_0XW4x2rqpk http://watch.discoverychannel.ca/#clip528321 |
RE: Harrier test flights begin
Pretty impressive for a Dustbuster ;) If only he tried hovering a lot lot higher he might have pulled it off.
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RE: Harrier test flights begin
Pegasus,
Is this another prototype/ test model of your harrier? If not, how is the progress on yours coming along? |
RE: Harrier test flights begin
Lookin good!!!
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RE: Harrier test flights begin
No this is the actual version, just doing as much testing with electric so I don't have to risk the turbo fan. The electric has enough power to go into hover but not into forward flight.
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RE: Harrier test flights begin
"Pretty impressive for a Dustbuster"
yeah a 13,000 watt dustbuster |
RE: Harrier test flights begin
Save the 13,000 watts for you wifes hairdryer, lets get some burnt kero smell!!! You have been waiting to long to see this bad boy hover!!! :D:D;);)
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RE: Harrier test flights begin
Very impressive. I am amazed a turbine manufacturer hasnt come out an rc turbofan engine yet. with the size of a p20 spinning a dynamax sized fan, would be pretty impressive.
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RE: Harrier test flights begin
ORIGINAL: invertmast Very impressive. I am amazed a turbine manufacturer hasnt come out an rc turbofan engine yet. with the size of a p20 spinning a dynamax sized fan, would be pretty impressive. |
RE: Harrier test flights begin
ORIGINAL: GSR ORIGINAL: invertmast Very impressive. I am amazed a turbine manufacturer hasnt come out an rc turbofan engine yet. with the size of a p20 spinning a dynamax sized fan, would be pretty impressive. |
RE: Harrier test flights begin
Wren have a turbofan running right now based on a 44 core.
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RE: Harrier test flights begin
ORIGINAL: invertmast Very impressive. I am amazed a turbine manufacturer hasnt come out an rc turbofan engine yet. with the size of a p20 spinning a dynamax sized fan, would be pretty impressive. |
RE: Harrier test flights begin
What power system (fan, ESC, lipos) are you using Pegasus?
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RE: Harrier test flights begin
1 Attachment(s)
ORIGINAL: Henke Torphammar ORIGINAL: invertmast Very impressive. I am amazed a turbine manufacturer hasnt come out an rc turbofan engine yet. with the size of a p20 spinning a dynamax sized fan, would be pretty impressive. Jets over Pampa 2011 Ciao Mauri |
RE: Harrier test flights begin
Glad to see your still plugging away at it Ewald! Keep going, you'll get there!
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RE: Harrier test flights begin
I saw a guy flying a turbofan out at El Mirage dry lake earlier this year. It was something he made himself...he worked at USC in their machine shop program. It had an air start core turbine, roughly p70 sized, with a shaft running through the center of it. at the back of the turbine was a wheel that was driven by the thrust of the turbine. At the front of the shaft was a larger diameter carbon fiber fan unit. All of this was in a nacelle setup that looked really nice. He had it on a high aspect ratio winged, v tail airplane with a center main wheel and outriggers on the wing tips (ala B-47, U2). The airplane was something he designed and built as well. Had a friend from NASA Dryden there with him helping out. The engine ran very well and put out lots of thrust. It was also very miserly on fuel.
The funny part was that they were impressed with my ViperJet! KMac |
RE: Harrier test flights begin
Its a 14 cell 60 volt Thunder Power battery, (which lets my fingers know every so often it 60 volts) a jeti 220amp esc and a home made motor and fan.
I had 3 more conventional flights today, I am trying to get it to slow down without pitching up and stalling, I will do this type of outing a few more times before another transitioning attempt, but test flights today looked very promising. This is what happened in the video. It will literally climb with flaps down until there is 0 airspeed left, and I did not have enough down in the elevator to force it down, then it will drop like a brick, giving you a split second to have full power on, this is not scale, and needs to be corrected. If I can keep level as it loses airspeed I can slowly add the power as the wing loses it's lift. It was kind of crazy having the first flight in front of the Discovery Channel, but its just the way the timing worked out, but the flight was not to bad it showed promise. I think this thing will challenge me right to the end, I pray that transition into forward flight comes easy, making more Pegasus turbofans is a s$*t load of work. It better not be another 24 years to finish it!!! |
RE: Harrier test flights begin
GR7Racer Yeah that was me
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RE: Harrier test flights begin
Cool Dude!.....your stuff really impressed me. Hope we get the chance to meet again and do some flying. Hope I got the particulars close on my description of your setup.
KennyMac |
RE: Harrier test flights begin
ORIGINAL: Pegasus Its a 14 cell 60 volt Thunder Power battery, (which lets my fingers know every so often it 60 volts) a jeti 220amp esc and a home made motor and fan. I had 3 more conventional flights today, I am trying to get it to slow down without pitching up and stalling, I will do this type of outing a few more times before another transitioning attempt, but test flights today looked very promising. This is what happened in the video. It will literally climb with flaps down until there is 0 airspeed left, and I did not have enough down in the elevator to force it down, then it will drop like a brick, giving you a split second to have full power on, this is not scale, and needs to be corrected. If I can keep level as it loses airspeed I can slowly add the power as the wing loses it's lift. It was kind of crazy having the first flight in front of the Discovery Channel, but its just the way the timing worked out, but the flight was not to bad it showed promise. I think this thing will challenge me right to the end, I pray that transition into forward flight comes easy, making more Pegasus turbofans is a s$*t load of work. It better not be another 24 years to finish it!!! David S |
RE: Harrier test flights begin
I had a stabilization computer developed for it, without this it would not work, although I have had some limited success with gyros but not as good as what I am using, the problem is, if you don't have the power on, your puffers are not working, and if the aircraft is gaining altitude as you are slowing down you don't want to add more power and go even higher. This is where all the work come in that I am doing now with the flaps and elevator trim mixes
GR7Racer, thanks, yup your description was just about bang on. Do you go to Elmirage often? |
RE: Harrier test flights begin
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RE: Harrier test flights begin
megafly That's my engine also, its basically the Pegasus turbo fan without the nozzles, same innards
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RE: Harrier test flights begin
Pegasus
I've been following your progress with the turbofan for quite a while. Every time I think of or see a Harrier I wonder how close you are. Good to see the progress. The turbofan is terrific and you are close to another of modeling's great accomplishments with the Harrier! Congrats.[8D][8D] |
RE: Harrier test flights begin
By the way, how did you deal with the static problem from the fan?
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