Harrier development

[Eddy]

Its not electric but you guys may enjoy it.
just click on bedstead
http://cpl.usc.edu/eschuste/

[v22chap]

Eddy ,,thanks for thinking about us and sharing .. Although I have been following this for about 1 yr now... but there may be others that have not seen it yet..... hope he gets it to work.
Larry

[derk]

i wanna see his newest micro turbine. his 2.25" one looks awsome with excellent thrust/weight.

[Eddy]

I should have mentioned that is my stuff, I go under Pegasus in RCU.
My really small engine is so close to running I just have not had the time to stay on it. I will post when it is running and flying. My 2 1/4" engine is now a turbo prop. Its running a little hot, I hope to finish it this weekend. I will also post pics when done.

[v22chap]

Eddy ,,that Pegasus engine is just an awsome piece of work ,,,have you done much more on that whole bird ????

I want to know more about your 2.25 motor and turbo prop unit ...been looking and waiting for someone to bring out this small of unit so I can do twin turbine motors on my V-22 and I think these units would do the job.
Larry

[Eddy]

I am getting stick time on the conventional flying Harrier. Its just waiting for the Pegasus to go in it, it will still be a while. Did you like the bedstead video?
I am going to do a little more work on the turbo prop this weekend, if it works properly and I get the temps down, I will post video.

[v22chap]

Eddy .. I haven't been to your site for awhile and missed that ... AWSOME ..... Just AWSOME.Glad to see it in the air and doing and sounding so good.

I know what you are saying about spending stick time on the airplane itself as we had the wood built front prop version many yrs ago and it was a hand full to fly and wait until you hover and then start to transition...I am finding my flying skills lacking when I see my V-22 do even the 60 degree transition and I think most of my problem right now (besides poorly built mechanics) is the pilot skills needed to do the transition. :eek: :D

Will be waiting with breath held for the small turbo prop vids ;) :D :cool:
Larry

[Eddy]

The Harrier itself flies quite well, it will bite you if you let it, the anhedral sure makes it want to roll. The more time I get on it the better.
I had a feeling you missed the video:-)

[v22chap]

Ours with the motor in the nose and the -7 degrees motor thrust made it also pitchy when you powered up and down. :eek: :D
Larry

[Eddy]

Do you have video?

[v22chap]

Sorry I don't ,,as this was way back in the early yrs,,when we didn't have enough money to own a video camera ,,much less know what one was ;) ;) :D

I also just watched your fly by while I was at the page rewatching the bedstead
:D ,,,what there is of it ,,,, whoooooo that thing is fast :eek: I could see how that could sneak up and bite you real quick :D :D
Larry

[Lewist]

Eddy

Nice work

I had seen the other videos but had also missed the bedstead.... It lots like its going to work and work really well!

Again..... really really nice work.

p.s. i do also like your ICDF batmobile... very cool!

[jumpy]

Great project Eddy, I'm working on something similar to be powered by electric, difference being you have two sources of thrust, one from the fan and the other from the turbine, whereas I will be relying on thrust from one fan exhuasting through four nozzles. How did you calculate the nozzle sizes and duct lenghts to get equal amounts of thrust out if each nozzle. With my idea I'd have the rear nozzles further away from the fan than the front nozzles, would I need to compensate and make the rear two nozzles larger or have a greater percentage of flow going to the rear than the front two? Keep up the good work. Cheers Phil.

[Eddy]

Thanks Lewist,
Jumpy,
you mean something like this picture???? This was my second attempt at a Harrier, I built it as light as possible and it still only had barely enough power to hover, I figured I was do it one more time, with a turbo fan, if this does not go I am done, But I think this one is going to be it. My front nozzles are scale and the rear are much smaller, I just pinched off the flow until I got max thrust and there you have it. I will need to make scale sized nozzles around the rear nozzles. To match the front and rear nozzles thrust, it is all done with fan pitch and power turbine matching.

[jumpy]

Great job, I think with the 120mm fans out there and high power motors it might be more possible to achieve a better thrust to weight ratio.

[jumpy]

On the mini turbine where do you bleed off air for the control jets, is it off the fan or the turbine and how do you control the air flow through them? Are you using gyros to assist control? Sorry for all the questions but this is fascinating stuff. Phil.

[Eddy]

The bleed air is off the fan and they have the same valve on them as the full sized Harrier has. I have 2 gyros on it for pitch and roll. No problem on the questions

[max.ferra]

Hi guys

Take a look here:

http://www.mauriziomartinucci.com/tabellaharrier2.htm

Max

[v22chap]

Can't read French ,,but looks like it might be an electric fan version ??
Looks nice any way.
Larry

[max.ferra]

Can't read French ,,but looks like it might be an electric fan version ??
Looks nice any way.
Larry

That's Italian! ;-) Try using babelfish or google translation....

That harrier was glow powered by a Rossi 108 motor.

Here you can see the first attempt without hovering capabilities.
http://www.mauriziomartinucci.com/tabellaharrier1.htm


Max

[HarrierJJ]

Good evening,

I'm an Aeronuatical Engineering student, currently in my second (middle) year at university in the UK. They have told us that we should start thinking about designs for final year projects now because apparently finding a good one takes time. I have a few in mind but one of them is the control system of V/STOL fixed wing aircraft and specifically the BAe Harrier.

As the project would be control systems as opposed to scale accuracy (engineering not art) would it be feasible for me to build an electric working Harrier in 6months? The beauty of such a project is that because I can specify that aim is control in the hover, it doesn't actually have to 'fly' forwards so flight dynamics/control wouldn't enter into the picture. It also means that I could have an external power and not way the machine down with batteries.

I now admit to having very little electronic know-how so this is just a preliminary idea and I am researching at the moment to make sure it would be viable and to perhaps see what may be involved components wise etc.

I noticed on this thread a super looking electric Harrier built by Eddy. I would be interested in some of the specs on that, Fan diamater and thrust etc.

The prototype Harrier had a power/weight ratio of approximately 1.2. As i'm not interested in the transition to S&L flight that will presumably be alright with enough extra power for manouevrability etc?

So many questions, and it's already so late (00:33)

Thanks for reading,

Jack

[Eddy]

The picture I put on the forum are of a 1/8th scale Harrier, It is powered by a OS max 91 with a dynamx fan. this unit supposedly make 12 pounds of thrust minus 40% loss due to turning the air so many times to exit the nozzles. To build what you are talking about in 6 months is a fair bit of work but should be doable, using a external power supply will make it a little easier

[pmackenzie]

Eddy,
That Pegasus is the coolest thing I have seen in a long time.
The video of the Harrier in the air was a close second. Even taxiing in after the landing was worth the download.
There is something about the lines of the Harrier that make most other modern jets pale in comparison.
Pat MacKenzie

[Eddy]

"There is something about the lines of the Harrier that make most other modern jets pale in comparison."
I could not agree more, it has a very serious look. BTW I am from Guelph originally, good to talk to someone from the area.