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RE: JetJoe
I've had my JJ1400 since April 2005 and it has performed just as I would have wished and still does.
It had a very slight vibration from new but I had it rebalanced and also had some uneven burning injectors sorted out. I used a Hausel pump and a Gaspar Espiell FADEC(manual start), and the turbine wheel is still in one piece and still using the original bearings. Look at the link below for pictures of the internals of the engine including pictures of where the "Chinese guys" grinded the wheel to balance it! [X(] There are also a few videos of it's first start-up etc;) http://www.rcgroups.com/forums/showt...6&page=3&pp=15 Greg |
RE: JetJoe
I was going to order something from JETJOE USA because the shipping from China stinks. I have e-mailed JJ in the past and yes he responds quickly.
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RE: JetJoe
Tahiet why didnt you send it back to joe? Mine still runs good. The first time I ran it I didnt even use an ECU. In fact I followed WrenS instructions for running a MW54 with out an ECU. Hmmm
I guess some people think the Chinees are dumb uneducated. |
RE: JetJoe
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Here are David`s pics
Nice smoker system :) |
RE: JetJoe
Morne,
Nothing to speculate about. The above two pictures speak for themselves, and a picture is worth a 1000 words! When anyone criticizes JJ, all the JJ supporters keep saying "prove it", and when proof is given, it's dismissed for any number of reasons. If you're into re-balancing, modifying, replacing parts, troubleshooting, etc, then JJ for you. Me, I want to go flying and not screw around with an engine. If there was an accident caused by an engine I worked on, the first question from the plaintiff's attorney to me would be: "exactly where did you receive training in the modification and repair of your engine". At the point, my lawyer would request we settle. I work too hard for my money to lose it because of an engine that is, IMO, marginal in quality and performance. For those of you want to take a chance and screw around with the engine in order to get it to work-go for it. BRG, Jon |
RE: JetJoe
Ha, Greg.....I love Yer avitar!!!!!
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RE: JetJoe
ok
i always wanted to say this... i got the popcorn grabbed a chair. i can see there are still a few seats left anyone? |
RE: JetJoe
Enjoying it already!
Take it "easy" tiger:D |
RE: JetJoe
Hi!
The point with our turbine was: It came from the german dealer. It was ordered for a review and fully paid. When the dealer was called he said: Naah, it's not me, send it back to China to Joe. I don't know Joe and I don't want to. If you buy a turbine from JETCAT USA, you send it straight to Bob Wilcox for service. I don't care if he does the service or sends it back to germany, not my part of the game. And I don't want to spend $100,- for postage to China.... If you have to re-ballance your turbine, change the injectors and do some fiddeling to get it working, you should have the skills to build your own turbine with the available parts from Wren, Funsonic or other guys. Is there anyone who has started and run a JetJoe out of the box for more than 10 hours without re-engineering? @greg: Is it right, that they did grind half of the turbine-wheel???? It is hard to tell from the pics on rc-groups. I will try to find the magazine and scan the pic of the turbine-wheel. @Sandor: Do you have some more Popcorn and a Diet-Coke? I grap my chair and watch, to make sure I can shout my comments inbetween :) Greets, David |
RE: JetJoe
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for tahfiet and everybody...
here a scan from FMT 9/2005.. enjoy:eek: |
RE: JetJoe
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Hi swissflyer!
A big thank you for the scan. I think these two pictures are even worse. And that is the same kind of grind-mark like you can see on rc-groups. I am getting sick when I think about the temperature and the rpm this whell will have during a normal run. Combined with bad ballancing and some high-Gs. |
RE: JetJoe
Skip it.
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RE: JetJoe
ORIGINAL: EASYTIGER ORIGINAL: s3nfo ORIGINAL: EASYTIGER Let's see the german magazine test. Print it here. Never seen a JJ turbine, so can't answer all your questions, but can answer a few. Printing the German magazine test article on RCU is what's called a copyright violation. If the magazine choses to post the article to the web, then someone could legally link to it, otherwise posting the article is a violation of the copyright holders rights. I normally don't have a problem with what you say, matter of fact I usually appreciate the "devil's advocate" position of you presenting the other side of whatever popular opinion you're arguing against today. But I'm getting a bit tired of you changing the facts and obfuscating when it starts going against you. In the first place, you have no clue about what I understand about copyright law, in fact Copyright law was part of the business law part of my BBA in business, also copyright law for technical manuals was part of the business ecthics curriculum when I got my MS in CIS. Additionally, Jim Pearson made sure I understood magazine responsibility under copyright law when I started writing for RCM. Please don't muddy the waters by trying to insuate those arguing against you "have limited understanding" of something when you actually "have limited understanding" of what others know or don't know. Then, you changed the facts. In your second post you said you can "quote" a magazine article, which you're correct, is legal, as long as you only quote relevant (small) portions of the article and attribute it correctly to the rights holder. This was changed from your first post where you said "Print the article here", and a wholesale reprint of an entire article is illegal. If you're going to keep up this constant barrage of taking the opposite side of an argument just to hear yourself post, at least keep your facts and quotes straight. |
RE: JetJoe
ORIGINAL: s3nfo ORIGINAL: EASYTIGER ORIGINAL: s3nfo ORIGINAL: EASYTIGER Let's see the german magazine test. Print it here. Never seen a JJ turbine, so can't answer all your questions, but can answer a few. Printing the German magazine test article on RCU is what's called a copyright violation. If the magazine choses to post the article to the web, then someone could legally link to it, otherwise posting the article is a violation of the copyright holders rights. I normally don't have a problem with what you say, matter of fact I usually appreciate the "devil's advocate" position of you presenting the other side of whatever popular opinion you're arguing against today. But I'm getting a bit tired of you changing the facts and obfuscating when it starts going against you. In the first place, you have no clue about what I understand about copyright law, in fact Copyright law was part of the business law part of my BBA in business, also copyright law for technical manuals was part of the business ecthics curriculum when I got my MS in CIS. Additionally, Jim Pearson made sure I understood magazine responsibility under copyright law when I started writing for RCM. Please don't muddy the waters by trying to insuate those arguing against you "have limited understanding" of something when you actually "have limited understanding" of what others know or don't know. Then, you changed the facts. In your second post you said you can "quote" a magazine article, which you're correct, is legal, as long as you only quote relevant (small) portions of the article and attribute it correctly to the rights holder. This was changed from your first post where you said "Print the article here", and a wholesale reprint of an entire article is illegal. If you're going to keep up this constant barrage of taking the opposite side of an argument just to hear yourself post, at least keep your facts and quotes straight. And LOTS of Jetjoes have been exploding and hurting people, too. Just stay away from jetjoe. That's what they say. I"m out of here. |
RE: JetJoe
im just glad i stopped caring about all this crap!! My jet joe 1200 needed work to bring it up to an engine that i logged 50 flights on then gave it back to justin... BUT it did and still does run and has NOT exploded.. Im going with a PST or a JET CAT for my next jet because i want reliability without having to tinker and i want a customer service base... Russ
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RE: JetJoe
ORIGINAL: Tar Baby im just glad i stopped caring about all this crap!! My jet joe 1200 needed work to bring it up to an engine that i logged 50 flights on then gave it back to justin... BUT it did and still does run and has NOT exploded.. Im going with a PST or a JET CAT for my next jet because i want reliability without having to tinker and i want a customer service base... Russ There is NO WAY you did fifty flights and not had it explode! And even if you DID, fifty flights is NOTHING! Us REAL jet modellers will do that in ONE WEEKEND. It says NOTHING! Get back to me after you have some 1500 flights or more on it...only THEN can you call it anything like reliable. |
RE: JetJoe
ORIGINAL: tahfiet Hi swissflyer! A big thank you for the scan. I think these two pictures are even worse. And that is the same kind of grind-mark like you can see on rc-groups. I am getting sick when I think about the temperature and the rpm this whell will have during a normal run. Combined with bad ballancing and some high-Gs. the turbine wheel picture was mine! i made this more then a year ago however if you buy me a beer next time you can have the rights of the photo.. |
RE: JetJoe
ORIGINAL: tahfiet Hi! The point with our turbine was: It came from the german dealer. It was ordered for a review and fully paid. When the dealer was called he said: Naah, it's not me, send it back to China to Joe. I don't know Joe and I don't want to. If you buy a turbine from JETCAT USA, you send it straight to Bob Wilcox for service. I don't care if he does the service or sends it back to germany, not my part of the game. And I don't want to spend $100,- for postage to China.... If you have to re-ballance your turbine, change the injectors and do some fiddeling to get it working, you should have the skills to build your own turbine with the available parts from Wren, Funsonic or other guys. Is there anyone who has started and run a JetJoe out of the box for more than 10 hours without re-engineering? @greg: Is it right, that they did grind half of the turbine-wheel???? It is hard to tell from the pics on rc-groups. I will try to find the magazine and scan the pic of the turbine-wheel. @Sandor: Do you have some more Popcorn and a Diet-Coke? I grap my chair and watch, to make sure I can shout my comments inbetween :) Greets, David the only thing that was wrong in the magazine to my opinion was the ecu problems. if the turbine does not work ok , so does the ecu. and if the ecu parameters are wrong then all the rest goes wrong. like the mentioned fuelpump they used. the ecu is to my opinion one of the best on the market. (but then opinions are like forums everyone seems to have one.:D) and if programmed correctly and a good steady turbine a good combination. i use the same ecu system. but i set up every Turbine with its own ECU test it and then ship it to a customer. i even keep a backup of every sold ecu/turbine so if the turbine come,s back for service intervals. i can check if the customers `played`with the parameters. as for the Jetjoe i saw a few outstanding running engines out there however: they where not directly from china ,they where rebuilded in europe. if set up correctly they runned ok. but then the price was just as high as anyone else. heck i even now people that hook a 3 amps "gas-fuel"solenoid to the fadec. and then where suprised it fried the fadec. those people can be even found in this topic.[8D] |
RE: JetJoe
Curtis! i think you need medication! LOL Russ:D
ORIGINAL: EASYTIGER ORIGINAL: Tar Baby im just glad i stopped caring about all this crap!! My jet joe 1200 needed work to bring it up to an engine that i logged 50 flights on then gave it back to justin... BUT it did and still does run and has NOT exploded.. Im going with a PST or a JET CAT for my next jet because i want reliability without having to tinker and i want a customer service base... Russ There is NO WAY you did fifty flights and not had it explode! And even if you DID, fifty flights is NOTHING! Us REAL jet modellers will do that in ONE WEEKEND. It says NOTHING! Get back to me after you have some 1500 flights or more on it...only THEN can you call it anything like reliable. |
RE: JetJoe
ORIGINAL: tahfiet If you have to re-ballance your turbine, change the injectors and do some fiddeling to get it working, you should have the skills to build your own turbine with the available parts from Wren, Funsonic or other guys. Come to think of it... Premade CC+Turbine+compressor+diffuser+ngv+misc acc. from WREN cost less than the JJ. I think I built my WREN for less than $700 AND I got a X-Ray'd wheel and support from WREN. Quick calculation: Average diameter - 50mm. RPM - 160,000 a = v^2/r v = rpm*2*pi*r = 160,000/60 *2*pi*0.05 => 837 m/s (or about 1,872 mph) a = v^2*r = 35,091G !!! Assuming that each blade weighs about 10 grams (0.35 oz) that would mean that each one pulls around 350 kg (771 lb) at top speed! Now do you feel safe standing around a substandard wheel that has been unsafely weakened? |
RE: JetJoe
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Hi!
@ Sandor. Sorry for that. The pics were published here at rcu before I think... but I will buy you a beer at the next jet-meeting. But I have to say: I really don't like the Fadec, it has a few funny things, but I am sure it does a good job when set-up like you or Wren or Simjet does. Just in case: the solenoids we used are from Pollack and delivered with the turbine... @ erazz: That's what I was thinking: If a turbine has to be redone for flawless runs, you could get better parts for the same price. On one picture you should be able to see the brand-new tail-cone. This engine has never run in that configuration on their test-bench. Why does it come with a data-sheet from a test-run???? @ET: I never said they will all explode. But with the same amount of time and money, a few things could have been made much better and safer... By the way: Are them AMA-legalized? Greetz, David |
RE: JetJoe
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ahh man.... I just toasted the bearings in my JJ today. [&:]
I recently installed a new starter on my engine, an aparently the lubericating line got crimped up under the blue cover when I installed it. Fortunatly, "only" the bearings are shot, no other damage. Bummer... [:@] |
RE: JetJoe
btw, anyone know the size of the nut at the turbnie wheel end is ?
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RE: JetJoe
I use a 5/16" 12 point socket, 8mm.
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RE: JetJoe
It's 8 mm, but you need a socket or ring spanner.
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