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Jumbo Jet RB211-22B Backyard Run On Youtube  
User currently offlineCaptainKramer From United Kingdom, joined Feb 2012, 225 posts, RR: 0
Posted (1 year 9 months 4 weeks 1 day 23 hours ago) and read 7897 times:

Hi all,

Hope this is the right place to post, but I was on another av website that had a link to the following on youtube.

Jumbo Jet RB211-22B Backyard Run.

As the saying goes don't try this at home, unless your British. There are other clips from same location that show what happens when you enter jet efflux of a RB211 at full thrust. Who would have thought, the principles of physics are universal, even when in a backyard. Go figure!

But seriously, what regulations are out there for this sort of thing, if any? And what are the chances of getting sucked in, what is considered a safe distance, given there is no screen in front of this particular engine.

Thanks in advance.

Frank

42 replies: All unread, showing first 25:
 
User currently onlineKELPkid From United States of America, joined Nov 2005, 6346 posts, RR: 3
Reply 1, posted (1 year 9 months 4 weeks 1 day 21 hours ago) and read 7855 times:

Quoting CaptainKramer (Thread starter):
But seriously, what regulations are out there for this sort of thing, if any?

Noise ordinances?   At least if it was in the city...

Quoting CaptainKramer (Thread starter):
And what are the chances of getting sucked in,

I'd say pretty decent, unless you know exactly what the proper stand-off distances are. In a typical backyard, you will probably do the engine some major damage by sucking in patio furniture, garden hoses, sprinklers, barbequeues, pets, tree branches, etc  



Celebrating the birth of KELPkidJR on August 5, 2009 :-)
User currently offlineak907 From United States of America, joined Mar 2012, 42 posts, RR: 0
Reply 2, posted (1 year 9 months 4 weeks 1 day 19 hours ago) and read 7805 times:

I was surprised he was able to stand behind it for so long. I've stood behind a 744's CF6 engine and the exhaust is very fast and hot even at idle. It expands at about a 20 degree angle behind the outlet.

User currently offlineStarlionblue From Greenland, joined Feb 2004, 17001 posts, RR: 67
Reply 3, posted (1 year 9 months 4 weeks 1 day 19 hours ago) and read 7777 times:

Quoting KELPkid (Reply 1):
Quoting CaptainKramer (Thread starter):
And what are the chances of getting sucked in,

I'd say pretty decent, unless you know exactly what the proper stand-off distances are. In a typical backyard, you will probably do the engine some major damage by sucking in patio furniture, garden hoses, sprinklers, barbequeues, pets, tree branches, etc

While I'm all for mad scientists and their experiments, I must say these people are a bit, ahem, cavalier with safety. Walking around it while it is running. Standing at the inlet while it is shutting down. No concern for shed blades etc... The whole thing made me cringe.



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlinetdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 4, posted (1 year 9 months 4 weeks 1 day 17 hours ago) and read 7704 times:

Quoting CaptainKramer (Thread starter):
But seriously, what regulations are out there for this sort of thing, if any?

None. It's not strapped to an airplane and will never fly again, so it's basically exempt from all relevant aviation regulations.

Quoting CaptainKramer (Thread starter):
And what are the chances of getting sucked in, what is considered a safe distance, given there is no screen in front of this particular engine.

Not high as long as you don't go near it at power. At idle, as long as you stay outside the safety zone (about 20' for this one, I think), it should not be a problem.

Quoting Starlionblue (Reply 3):
Walking around it while it is running.

I don't see that being such a big deal...it's not uncommon at all in test environments.

Quoting Starlionblue (Reply 3):
Standing at the inlet while it is shutting down.

As long as it's really fuel-off and just spinning down from idle that's not such a big deal; the fan loses RPM very quickly without fuel (all that power extraction, no power input) and suction drops off by at least the square of RPM (maybe cubed, I can't remember).

Quoting Starlionblue (Reply 3):
No concern for shed blades etc...

They've got the full nacelle so they've got full containment...a shed blade should go out the pipe (bad if you're filming from the back, otherwise OK). In the event of a rotor burst you're screwed no matter what, but we don't worry about that for commercial flying so I'm not sure why it would be worse here.

Quoting Starlionblue (Reply 3):
The whole thing made me cringe.

Well, yes. But I still want one.

Tom.


User currently offlineStarlionblue From Greenland, joined Feb 2004, 17001 posts, RR: 67
Reply 5, posted (1 year 9 months 4 weeks 1 day 11 hours ago) and read 7591 times:

Thanks for info Tom. I guess I'm just paranoid. 


"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlinehiflyer From United States of America, joined Nov 2004, 2167 posts, RR: 3
Reply 6, posted (1 year 9 months 4 weeks 1 day 10 hours ago) and read 7575 times:

First off I was expecting to look at a pretty ragged out 40 yr old turbine...instead it looks ready to hang! Now the benefits of having one in your back yard?
1 mosquito smoke sprayer on startup
2 Leaf blower
3 Snow removal
4 Drive 20 big windmills and power the community
5 Heck of a conversation piece at your next backyard bbq

Looks fairly rural so noise ordinances may be few. The obvious quality the team took in doing this...from test stand to pad to airstart and engine detailing indicates a professional operation and not backyard johnny chanting "light the fire". (That stand is not designed for thrust....and I fully believe that team understands it....backyard johnny woud yell "Let er rip")


User currently offlineAaron747 From Japan, joined Aug 2003, 8021 posts, RR: 26
Reply 7, posted (1 year 9 months 4 weeks 1 day 5 hours ago) and read 7437 times:

Quoting tdscanuck (Reply 4):
Well, yes. But I still want one.

Amen to that.         



If you need someone to blame / throw a rock in the air / you'll hit someone guilty
User currently offlineoverloaduk From United Kingdom, joined Mar 2009, 69 posts, RR: 0
Reply 8, posted (1 year 9 months 4 weeks 1 day 2 hours ago) and read 7359 times:

The link is not working anymore

User currently offlinefrancoflier From France, joined Oct 2001, 3738 posts, RR: 11
Reply 9, posted (1 year 9 months 4 weeks 1 day 1 hour ago) and read 7342 times:

Quoting overloaduk (Reply 8):
The link is not working anymore

A quick search on Youtube will get you fixed.

Now, Am I one of the very few people who'd love to be this guy's neighbor, or what?

Quoting hiflyer (Reply 6):

6 'Honey, we're out of grated cheddar!'
...



Looks like I picked the wrong week to quit posting...
User currently offlineAaron747 From Japan, joined Aug 2003, 8021 posts, RR: 26
Reply 10, posted (1 year 9 months 4 weeks 19 hours ago) and read 7204 times:

Quoting francoflier (Reply 9):
6 'Honey, we're out of grated cheddar!'

   thanks for that!

I hereby propose an a.net meet/expedition to find this operation and have a small RB211 celebration with these guys 



If you need someone to blame / throw a rock in the air / you'll hit someone guilty
User currently offlineDreadnought From United States of America, joined Feb 2008, 8791 posts, RR: 24
Reply 11, posted (1 year 9 months 3 weeks 5 days 21 hours ago) and read 6742 times:

I'm sure his neighbors must LOVE this guy...


Veni Vidi Castratavi Illegitimos
User currently offlineViscount724 From Switzerland, joined Oct 2006, 24880 posts, RR: 22
Reply 12, posted (1 year 9 months 3 weeks 5 days 20 hours ago) and read 6709 times:

Quoting tdscanuck (Reply 4):
Quoting Starlionblue (Reply 3):
No concern for shed blades etc...

They've got the full nacelle so they've got full containment...a shed blade should go out the pipe (bad if you're filming from the back, otherwise OK). In the event of a rotor burst you're screwed no matter what, but we don't worry about that for commercial flying so I'm not sure why it would be worse here.

A reader comment below the video questioned the safety aspect. The response was that he never operates it above idle speed.


User currently offlineAircellist From Canada, joined Oct 2004, 1711 posts, RR: 8
Reply 13, posted (1 year 9 months 3 weeks 5 days 16 hours ago) and read 6662 times:

Quoting Viscount724 (Reply 12):
A reader comment below the video questioned the safety aspect. The response was that he never operates it above idle speed.

Anything else would be too much looking for trouble.

... Well... I've just watched and I'm still in full disbelief...

And that smoke cloud just reminded me of AC's Tristars at YMX...


User currently offlinebohica From United States of America, joined Feb 2004, 2671 posts, RR: 0
Reply 14, posted (1 year 9 months 3 weeks 3 days 20 hours ago) and read 6302 times:

This guy must have a lot of money to be able to afford all the fuel needed to run that engine. Those RB211's burn a lot of fuel.

User currently offlineDocLightning From United States of America, joined Nov 2005, 19415 posts, RR: 58
Reply 15, posted (1 year 9 months 3 weeks 3 days 19 hours ago) and read 6270 times:

Quoting bohica (Reply 14):
This guy must have a lot of money to be able to afford all the fuel needed to run that engine. Those RB211's burn a lot of fuel.

That's what occurred to me, too. Although at idle, maybe not so much. But did you see what those trees did at idle?

My question is: why the hell would you want to go to the trouble of rigging a turbofan up in your backyard that you can't even run above idle?


User currently offlinetdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 16, posted (1 year 9 months 3 weeks 3 days 17 hours ago) and read 6227 times:

Quoting DocLightning (Reply 15):
My question is: why the hell would you want to go to the trouble of rigging a turbofan up in your backyard that you can't even run above idle?

I don't understand the question. He has a *running turbofan* in his *backyard*! Why the hell *wouldn't* you want that?!

Tom.


User currently offlineDocLightning From United States of America, joined Nov 2005, 19415 posts, RR: 58
Reply 17, posted (1 year 9 months 3 weeks 3 days 17 hours ago) and read 6225 times:

Quoting tdscanuck (Reply 16):
I don't understand the question. He has a *running turbofan* in his *backyard*! Why the hell *wouldn't* you want that?!

I mean... what could possibly go wrong?


User currently offlineNewark727 From United States of America, joined Dec 2009, 1335 posts, RR: 0
Reply 18, posted (1 year 9 months 3 weeks 3 days 16 hours ago) and read 6200 times:

Quoting tdscanuck (Reply 16):
I don't understand the question. He has a *running turbofan* in his *backyard*! Why the hell *wouldn't* you want that?!

I think what DocLightning is asking is when you've dismissed enough questions of practicality and money, and quite frankly sanity to go and install an entire jet engine in your backyard, why not go the whole way and make it so that you can run it full power? 


User currently offlineDocLightning From United States of America, joined Nov 2005, 19415 posts, RR: 58
Reply 19, posted (1 year 9 months 3 weeks 3 days 2 hours ago) and read 6060 times:

Quoting Newark727 (Reply 18):

I think what DocLightning is asking is when you've dismissed enough questions of practicality and money, and quite frankly sanity to go and install an entire jet engine in your backyard, why not go the whole way and make it so that you can run it full power?

Actually, fair point. If I'm going to mount an RB-211 in my backyard, I want to HEAR WHAT IT SOUNDS LIKE AT TAKEOFF POWER!

I mean, that's why this particular model is so beloved by us A.nerds, right? It makes the most glorious and melodic buzz when pushed up to full power. If you can't do that, why have one in your back yard?


User currently offlinetdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 20, posted (1 year 9 months 3 weeks 3 days 2 hours ago) and read 6054 times:

Quoting DocLightning (Reply 17):
I mean... what could possibly go wrong?

Fair enough. But I have neighbors who deep fry turkeys...I worry more about them than this guy.

Quoting Newark727 (Reply 18):
I think what DocLightning is asking is when you've dismissed enough questions of practicality and money, and quite frankly sanity to go and install an entire jet engine in your backyard, why not go the whole way and make it so that you can run it full power?

Good point. In for a penny, in for a pound...

Tom.


User currently offlineboacvc10 From United States of America, joined Jul 2006, 609 posts, RR: 0
Reply 21, posted (1 year 9 months 3 weeks 3 days 1 hour ago) and read 6046 times:

Quoting Newark727 (Reply 18):
I think what DocLightning is asking is when you've dismissed enough questions of practicality and money, and quite frankly sanity to go and install an entire jet engine in your backyard, why not go the whole way and make it so that you can run it full power? 

Hah, most of you a.nuts are missing the point. He did it because he could.

That said, at my university (GWU, Foggy Bottom, Wash. DC) in one dim and darrk dungeon, there is an entire jet engine, courtesy of the Propulsion lab of School of Engineering and Applied Sciences. From comments by the staff of the university, upto about 8 / 9 years ago, the engine was regularly operated, and at one point, students/staff would be permitted to feel the thrust generated by the engine at low power - essentially standing behind it at a safe distance. Now, I have not witnessed it in operation, but the engine is intact it seems, and sitting doing not much, of anything nowadays.

I think the utility of having actual engines is debatable, as most data collection/analysis is done through modeling and simulation anyway - and I am sure there are other such defunct facilities all around the US wherever there is an aerospace engineering department. But as a mechanical engineering enthusiast, the experimenter seems to have learnt a lot, and show others that a little can go a long way. So, he is effectively putting out a challenge for those (techs, engineers, students, researchers) .. look at what I can do.

Fuel consumption would be his ultimate expense, and I wouldn't be surprised if a local college were to eventually want to help offset that expense by exchanging student time for experience. Or, Rolls Royce could consider helping out ... it should be a pittance for them to see one of their babies in up and running in good conditoin. Essentially any aviation museum would also be grateful to get a donation of a working jet engine (in this case, a LARGE jet engine) , so that option is also available, and if you can spend $$$$$$$ on restoring old cars, aircraft, why not this project?



Up, up and Away!
User currently offlineDocLightning From United States of America, joined Nov 2005, 19415 posts, RR: 58
Reply 22, posted (1 year 9 months 3 weeks 3 days 1 hour ago) and read 6026 times:

Quoting tdscanuck (Reply 20):
Fair enough. But I have neighbors who deep fry turkeys...I worry more about them than this guy.

I wonder... could you mount a turkey behind the core on the RB-211 and roast it that way? Might wind up pretty dry, though...   

Ever had a deep-fried turkey, BTW? Delish...


User currently offlinefrancoflier From France, joined Oct 2001, 3738 posts, RR: 11
Reply 23, posted (1 year 9 months 3 weeks 3 days ago) and read 6004 times:

Full power runs would be sweet.

But there's 20 Tons of thrust to keep in leash somehow, household insurance broker to take to the hospital if he ever finds out, and I don't care how far into nowhere that guy lives, people are going to hear that.

Oh, what's the fuel flow of a fully unleashed RB211 at sea level again?



Looks like I picked the wrong week to quit posting...
User currently offlinetdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 24, posted (1 year 9 months 3 weeks 2 days 20 hours ago) and read 5944 times:

Quoting DocLightning (Reply 22):
I wonder... could you mount a turkey behind the core on the RB-211 and roast it that way? Might wind up pretty dry, though...

And you'd have to go catch it when it flew off your support and went bouncing away into the underbrush...might be a little more jet fuel scent than I really want to be eating too. The thrust frame this guy has doesn't really look up to the task of holding back full takeoff thrust.

Quoting DocLightning (Reply 22):
Ever had a deep-fried turkey, BTW? Delish...

Many. Just because I don't trust my neighbors doesn't mean I don't trust me.

Quoting francoflier (Reply 23):
Oh, what's the fuel flow of a fully unleashed RB211 at sea level again?

North of 10 tons per hour.

Tom.


User currently offlinejetpropulsion From United Kingdom, joined Nov 2010, 5 posts, RR: 0
Reply 25, posted (1 year 9 months 3 weeks 2 days 11 hours ago) and read 6179 times:

I guess my little project would eventually find it's way onto Airliners.net, so thanks for the positive feedback and glad you all enjoyed the video as much as we did making it....it was a great thrill to see the RB211 start first time having not been used for probably 20 years!!

My colleagues and I are a group of amateur gas turbine enthusiasts and between us we have restored and run all sorts of gas turbine engines from APU's , air starters up to AI25's and RR Spey engines. This was the biggest project to date.

To answer a few questions: We are safety aware and appreciate the risks of ingestion, FOD and failures. The engine has only been run up to flight idle so far and at this speed is fairly docile with a low risk of ingestion. We do not stray into the 180 degree arc of the intake and keep well away from the front when it is running. The risk of failure is low as the engine is well within the life limit of hours and cycles.
Compared to smaller gas turbines it's easier to start and run as it spools up slowly and runs very cool.
We'd love to run it at higher power but at the moment the main issue preventing this is the ability to supply enough fuel. The engine in it's present form is gravity fed and would probably need a fuel booster pump and a bigger tank....it starts getting expensive!
We used 400 ltrs just for a combined running time of 30 mins.
If your interested you can look at my blog/website www.jetpropulsion.co.uk which explains how I got it running. Some of you may also be interested in my friend Adrian Bennett's site www.jetpower.co.uk and also Ian Bennett's site www.ianfbennett.co.uk.

Kind regards

Justin Woolgar


User currently offlineMD11Engineer From Germany, joined Oct 2003, 13968 posts, RR: 63
Reply 26, posted (1 year 9 months 3 weeks 2 days 10 hours ago) and read 6112 times:

Quoting tdscanuck (Reply 24):
And you'd have to go catch it when it flew off your support and went bouncing away into the underbrush...might be a little more jet fuel scent than I really want to be eating too. The thrust frame this guy has doesn't really look up to the task of holding back full takeoff thrust.

Tom,
to me this doesn´t look like a proper test stand thrust frame, but more like a slightly modified engine transport and change cradle. I´ll doubt that it can withstand full T/O thrust.

Also, for those who don´t work on jet engines, the intake danger area increases dramatically when the throttles are being pushed forward.

In any case, he has the biggest (and meanest) leaf blower in town. It will blow the leaves straight into next county.  

A colleague of mine has purchased an old engine of a Czech L-29 trainer on eBay and wants to build a test stand to run it in his garden as well.

But did you guys see these people? They built the biggest amateur built liquid fuel rocket engine so far:
http://www.youtube.com/watch?v=zRyh66zPy5U
with so far 6.5 tons of thrust (but with full throttle it can do 10 tons of thrust).
Check www.copenhagensuborbitals.com

Jan


User currently offlineAircellist From Canada, joined Oct 2004, 1711 posts, RR: 8
Reply 27, posted (1 year 9 months 3 weeks 2 days 6 hours ago) and read 6136 times:

Quoting jetpropulsion (Reply 25):

Very cool to have you on board! Congratulations, by the way.


User currently offlinejetpropulsion From United Kingdom, joined Nov 2010, 5 posts, RR: 0
Reply 28, posted (1 year 9 months 3 weeks 2 days 3 hours ago) and read 6117 times:

Quoting MD11Engineer (Reply 26):
Quoting MD11Engineer (Reply 26):
to me this doesn´t look like a proper test stand thrust frame, but more like a slightly modified engine transport and change cradle. I´ll doubt that it can withstand full T/O thrust.

Yes, you're right. The engine is on a transportation stand that we have modified. The engine is supported at 4 points on the front compressor casing in addition to the front and rear engine mounts by several v.large bolts. The whole frame sits on 2 railway sleepers and is fixed to the ground into concreted supports. Just to move the whole assembly on wheels would require 20,000 lbs of thrust. Having said that the frame is unproven at take-off power so another reason not to try a full power run....yet 


User currently offlineNewark727 From United States of America, joined Dec 2009, 1335 posts, RR: 0
Reply 29, posted (1 year 9 months 3 weeks 1 day 17 hours ago) and read 5949 times:

The neighbor jokes are a cliche but I do kind of wonder where you're living where this sort of thing can be accomplished without a major hue and cry from someone or other. That said, impressive bit of work and certainly the sort of bragging rights that not everyone can claim.  

User currently offlineboacvc10 From United States of America, joined Jul 2006, 609 posts, RR: 0
Reply 30, posted (1 year 9 months 3 weeks 1 day 17 hours ago) and read 5939 times:

Quoting jetpropulsion (Reply 28):
Just to move the whole assembly on wheels would require 20,000 lbs of thrust. Having said that the frame is unproven at take-off power so another reason not to try a full power run....yet 

[This is my attempt at late night humor - I'm studying]

You have the engine, and a fuel tank. You have a frame, and a way to start the engine. The engine mounting points are well understood ...The frame can be replaced with a sturdier chassis (e.g., truck with large wheels) if needed.


Will you be looking at a pair of wings next ? From my favorite movie: and note the story protagonist was a hobby model plane designer.

http://www.youtube.com/watch?v=IACjOvyx5hs



Up, up and Away!
User currently offlinejetpropulsion From United Kingdom, joined Nov 2010, 5 posts, RR: 0
Reply 31, posted (1 year 9 months 3 weeks 1 day 15 hours ago) and read 5920 times:

Quoting Newark727 (Reply 29):
Quoting Newark727 (Reply 29):
The neighbor jokes are a cliche

Understandable I guess....we do live in fairly rural area luckily so neighbours are not a major problem. I know that you really have to be careful with a project like this in not upsetting people as it only takes a few complaints before you will have the local town council/planners on your back looking for an excuse to stop me tinkering around with it. So far the only issue I have had is with the shelter the RB211 is housed in......fortunately it's not classed as a permanent structure but I think it's only a matter of time before they realise what's underneath and "pull the plug" on the whole project, till then it's a question of enjoying it while you can!


User currently offlineMD11Engineer From Germany, joined Oct 2003, 13968 posts, RR: 63
Reply 32, posted (1 year 9 months 3 weeks 1 day 13 hours ago) and read 5869 times:

The Danes I mentioned earlier, who are set to build rockets to launch a man into space (and possibly orbit) have set up shop in a disused shipyard in Copenhagen. Unlke you they´ll also have to deal not just with noise from their rocket engine tests, but also with the very real danger of an explosion of their engines. They picked an area in an abandoned dry dock, with an earth wall and plenty of distance to their next neighbours. They also built two proper test stands with plenty of concrete around it and an observation bunker.
And for launching their rockets they use a naval artillery range in the Baltic, east of the island of Bornholm.

Jan


User currently offlinefrancoflier From France, joined Oct 2001, 3738 posts, RR: 11
Reply 33, posted (1 year 9 months 3 weeks 1 day ago) and read 5734 times:

Quoting jetpropulsion (Reply 31):
but I think it's only a matter of time before they realise what's underneath and "pull the plug" on the whole project, till then it's a question of enjoying it while you can!

Yes, you do look like you're having too much fun with that. This is Europe you know, we don't like it when other people are enjoying themselves.  

Have you tried running it on different / mixed fuels? That could be an interesting experiment. Turbines can run on pretty much anything. It might not take many modifications to have it spinning on vegetable oil, for instance?



Looks like I picked the wrong week to quit posting...
User currently offlineshufflemoomin From Denmark, joined Jun 2010, 471 posts, RR: 1
Reply 34, posted (1 year 9 months 3 weeks 22 hours ago) and read 5692 times:

Quoting MD11Engineer (Reply 32):
The Danes I mentioned earlier, who are set to build rockets to launch a man into space (and possibly orbit) have set up shop in a disused shipyard in Copenhagen. Unlke you they´ll also have to deal not just with noise from their rocket engine tests, but also with the very real danger of an explosion of their engines. They picked an area in an abandoned dry dock, with an earth wall and plenty of distance to their next neighbours. They also built two proper test stands with plenty of concrete around it and an observation bunker.
And for launching their rockets they use a naval artillery range in the Baltic, east of the island of Bornholm.

They're not far from neighbours. They're two minutes away from me and a huge summerhouse area. Luckily they don't make any noise that I've noticed.


User currently offlinejetpropulsion From United Kingdom, joined Nov 2010, 5 posts, RR: 0
Reply 35, posted (1 year 9 months 3 weeks 11 hours ago) and read 5598 times:

Quoting francoflier (Reply 33):
Quoting francoflier (Reply 33):
Have you tried running it on different / mixed fuels? That could be an interesting experiment. Turbines can run on pretty much anything. It might not take many modifications to have it spinning on vegetable oil, for instance?

No we haven't tried that but I think it would probably run on diesel, veg oil or whatever. I know of a fellow turbine enthusiast who ran a RR Nimbus on just about everything including tallow although that stuff did start to clog the fuel system
  


User currently offlineMD11Engineer From Germany, joined Oct 2003, 13968 posts, RR: 63
Reply 36, posted (1 year 9 months 3 weeks 11 hours ago) and read 5592 times:

Quoting jetpropulsion (Reply 35):
No we haven't tried that but I think it would probably run on diesel, veg oil or whatever. I know of a fellow turbine enthusiast who ran a RR Nimbus on just about everything including tallow although that stuff did start to clog the fuel system

Old (non-bio) diesel should be ok, though turbine fuel is refined to reduce the sulphur content even more than the normal ultra-low sulphur diesel, because sulphur attacks the hot section compenents, especially the turbine blades.
You might also have a problem with coking in the fuel injectors. Jet A1 is more thermically stable.
Other, non-diesel, fuels like veg oil will give you problems with coking and you´d also have to adjust the FCU due to energy content differences and different viscosities.

Jan


User currently offlinerjsampson From United States of America, joined exactly 4 years ago today! , 35 posts, RR: 0
Reply 37, posted (1 year 9 months 1 week 5 days 15 hours ago) and read 4777 times:

Justin,

Well done. You're on par with AgentJayZ from YouTube, and this doesn't even appear to be your day job. I'm sure Tom and I aren't the only a-nutters that have thought about the idea of having a static widebody turbofan in our backyards that we could crank for giggles.

Here is your airliners.net directive (now that you're here): as soon as you get that thing burning any measure of EPR higher than idle, you will start a thread in this technical operations forum announcing as much, with a link to the video.

You're quite the engineer! Welcome, and we're looking forward to you finally getting rid of those pesky trees.


User currently offlinejetpropulsion From United Kingdom, joined Nov 2010, 5 posts, RR: 0
Reply 38, posted (1 year 9 months 1 week 4 days 3 hours ago) and read 4480 times:

Thanks for the supportive comments. We'll have to see how things go after we've run it a few times....not easy as I need a few people to run the starters and it drinks fuel like my mother drinks whiskey!!!! but will definitely let you guys know what happens.

User currently offlineDreadnought From United States of America, joined Feb 2008, 8791 posts, RR: 24
Reply 39, posted (1 year 9 months 1 week 4 days 2 hours ago) and read 4438 times:

Quoting jetpropulsion (Reply 25):
I guess my little project would eventually find it's way onto Airliners.net, so thanks for the positive feedback and glad you all enjoyed the video as much as we did making it....it was a great thrill to see the RB211 start first time having not been used for probably 20 years!

Has anyone told you you were Nucking Futs?  

Seriously, my wife gave me hell for having plane spotting as a hobby and having piles of slides everywhere...

Actually I just had a thought. My back yard is on a lake (picture below). If I mount an engine like that down by the water, it would be a cool attraction for all the people who might want to try windsurfing or hi-speed sailing on the lake. Might be an opportunity there...




Veni Vidi Castratavi Illegitimos
User currently offlineAircellist From Canada, joined Oct 2004, 1711 posts, RR: 8
Reply 40, posted (1 year 9 months 1 week 3 days 17 hours ago) and read 4300 times:

Quoting rjsampson (Reply 37):
Justin,

Well done. You're on par with AgentJayZ from YouTube, and this doesn't even appear to be your day job. I'm sure Tom and I aren't the only a-nutters that have thought about the idea of having a static widebody turbofan in our backyards that we could crank for giggles.

Here is your airliners.net directive (now that you're here): as soon as you get that thing burning any measure of EPR higher than idle, you will start a thread in this technical operations forum announcing as much, with a link to the video.

You're quite the engineer! Welcome, and we're looking forward to you finally getting rid of those pesky trees.

I would add that when you eventually get hold of the two other engines and of the remainder of the Tristar, I and a few other fellows would gladly volunteer to help flatten the land around your dwelling... In exchange for a sighseeing tour, of course 


User currently offlinericknroll From Afghanistan, joined Jan 2012, 783 posts, RR: 0
Reply 41, posted (1 year 8 months 3 weeks 5 days 13 hours ago) and read 3267 times:

Quoting DocLightning (Reply 15):
My question is: why the hell would you want to go to the trouble of rigging a turbofan up in your backyard that you can't even run above idle?

If you have to ask then you don't understand.


User currently offlinercair1 From United States of America, joined Oct 2009, 1308 posts, RR: 52
Reply 42, posted (1 year 8 months 3 weeks 3 days 22 hours ago) and read 3233 times:
AIRLINERS.NET CREW
CUSTOMER SERVICE & SUPPORT

Quoting tdscanuck (Reply 4):
Well, yes. But I still want one.

One? Hell - to do this proper we need 3....

Quoting DocLightning (Reply 15):
My question is: why the hell would you want to go to the trouble of rigging a turbofan up in your backyard that you can't even run above idle?

Because.....

Quoting tdscanuck (Reply 20):
Fair enough. But I have neighbors who deep fry turkeys...I worry more about them than this guy.

As a fireman - I've responded to far more turkey frying incidents than to "my jet engine came loose in the back yard" incidents.... I'm just sayin'



rcair1
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