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New JetJoe J-Junior 4lbs turbine

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New JetJoe J-Junior 4lbs turbine

Old 04-16-2009, 10:16 AM
  #176  
jason
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Default RE: New JetJoe J-Junior 4lbs turbine

Asked Joe for some replacement wavy washers but he said he would rather have the turbine back. I guess if he is fitting a thicker wavy washer then the spacer will need reducing by the same amount. Anyway it's a pain in the bum having to send it back but I guess thats what I will do.

Jason
Old 04-16-2009, 10:25 AM
  #177  
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Default RE: New JetJoe J-Junior 4lbs turbine



Copying a product without even thoroughly understanding it and then perform R&D with your customers.

Old 04-16-2009, 10:29 AM
  #178  
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Default RE: New JetJoe J-Junior 4lbs turbine

ORIGINAL: SpiderJets



Copying a product without even thoroughly understanding it and then perform R&D with your customers.


Yes you are quite right but I knew what the deal was when I bought this engine. I tried on two occasions to buy the Lambert but after promises of delivery from Martin and then not responding to emails I decided to buy a knock off.

Jason
Old 04-16-2009, 10:48 AM
  #179  
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Default RE: New JetJoe J-Junior 4lbs turbine

Jason,

I meet tomorrow with Martin Lambert as the Kolibri Jet Meeting takes place this weekend in Bedesbach, Germany.
If you want me to, I can ask him in person what went wrong and send you a PM afterwards.

PS. Other than being a very satisfied customer with the product and service, I am not affiliated or involved.

Nicolas.
Old 04-16-2009, 11:01 AM
  #180  
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Default RE: New JetJoe J-Junior 4lbs turbine

Fine, he has had mails form me and then Jetline in the uk. Both times I/we were promised engines and both times the date came and went and then no email response. You could ask him for some preload wavy washers for me though.. Just kidding.

jason
Old 04-16-2009, 11:24 AM
  #181  
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Default RE: New JetJoe J-Junior 4lbs turbine

My own first order went totally wrong too ; up to the point that I firmly cancelled my order and was ready to buy anything close to it
(What had happened and why I became upset was not the fault of Martin Lambert.)
It's now about one year ago and since Martin took over from that German dealer, I have nothing but an outstanding experience with him and his service. He never failed one promise either, and I would not hesitate to order from him again.
Old 04-18-2009, 01:27 PM
  #182  
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Default RE: New JetJoe J-Junior 4lbs turbine

While the flaw with the preload washer is a negative. It is nice to see that JJ is not only fixing the problem, but taking care of the customers. It's a new motor for JJ so I cant say I'm completely floored that there was a problem. After a few bugs are worked out, this may be a good engine.

I honestly got a kick out of a comment above. "RnD on the customers dime"

While the comment may be true......The automotive industry has been doing this since day one. I'm an auto tech for GM. I can say first hand that ALL the manufacturers are guilty of this and still do it today. I cant believe there isn't a full-blown world wide news story on this! However.... It's how they keep costs down and vehicle deliveries on time.
Old 04-18-2009, 05:20 PM
  #183  
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Default RE: New JetJoe J-Junior 4lbs turbine

I think Nicolas and Jason have a little less than they could. I find that Jet Joe is a responsible manufacturer taking care of their customers. There products aren't perfect nor are any others read the turbine clinic threads. Some can belittle others hoping to scare people to buy their favorite products. If you want to belittle someone tell all your friends personally. Try taking the high road for a change. You might find you'll have a little more.....respect.

Jay
Old 04-18-2009, 05:33 PM
  #184  
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Default RE: New JetJoe J-Junior 4lbs turbine


ORIGINAL: jayman618

I think Nicolas and Jason have a little less than they could. I find that Jet Joe is a responsible manufacturer taking care of their customers. There products aren't perfect nor are any others read the turbine clinic threads. Some can belittle others hoping to scare people to buy their favorite products. If you want to belittle someone tell all your friends personally. Try taking the high road for a change. You might find you'll have a little more.....respect.

Jay

What are you talking about? I am absolutely not trying to belittle JJ. I think if you took the time to read my posts you will find that I am impressed by the engine and the only failing I have found with it has later been confirmed by JJ. So I am afraid your post is non factual utter rubbish.

Jason
Old 04-18-2009, 06:40 PM
  #185  
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Default RE: New JetJoe J-Junior 4lbs turbine


ORIGINAL: jayman618

I think Nicolas and Jason have a little less than they could. I find that Jet Joe is a responsible manufacturer taking care of their customers. There products aren't perfect nor are any others read the turbine clinic threads. Some can belittle others hoping to scare people to buy their favorite products. If you want to belittle someone tell all your friends personally. Try taking the high road for a change. You might find you'll have a little more.....respect.

Jay
Jay,

I have remained civil on this thread, and I am all for competition, but not at the expense of the consumer. Some people may (without proper warning) have looked at this thread and thought that this turbine was actually a potential candidate for everyday use. It is not. And it will not be (if at all) for quite some time. In the words of your President, you can put lipstick on a pig, but it's still a pig.

Those looking to actually build and fly a nano-turbine powered aircraft, and not have to worry about repairs, modifications, or future updates will not be happy with this turbine. If you like to tinker and are more of a re-design, and do-it your-selfer, this may very well be the perfect turbine for you.

Yes, I am the U.S. importer for the original nano-turbine (Kolibri) and my opinion will probably always be biased (human nature) but as a brother modeler, people must be warned ahead of time that this is not a finished product.

Chad
Old 04-19-2009, 04:50 PM
  #186  
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Default RE: New JetJoe J-Junior 4lbs turbine

Actually, Jason from the UK, has been pretty fair and unbiased with his posts for and against JJ. Perhaps Jayman is confusing Jason with another person?
Old 04-19-2009, 08:16 PM
  #187  
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Default RE: New JetJoe J-Junior 4lbs turbine

WILL IT WORK WELL IN A COMPOSITE-ARF SPARK ????
Old 04-19-2009, 10:18 PM
  #188  
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Default RE: New JetJoe J-Junior 4lbs turbine

No, It will work in a plane up to about 6 pounds MAX. And that is even pushing it.
Old 04-19-2009, 10:26 PM
  #189  
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Default RE: New JetJoe J-Junior 4lbs turbine

I think 2 of them in a Royal/Marutaka Cessna Citation is in order...

Even if it weighs in at 12lbs.
Old 04-26-2009, 07:26 AM
  #190  
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Default RE: New JetJoe J-Junior 4lbs turbine

I haven't run turnine again as I was out of town . I made a brake for the plane. I haven't mixed any new fuel yet. I'll do it this week.we have 2 week till we have to race again.
Old 04-26-2009, 09:18 AM
  #191  
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Default RE: New JetJoe J-Junior 4lbs turbine

Idleup,

I'd think about sending it back and get the new preload fitted before you run it again.

J
Old 04-26-2009, 04:24 PM
  #192  
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Default RE: New JetJoe J-Junior 4lbs turbine

has anybody put anymore runs on their jj-juniors? its been quiet for a while.
Old 04-27-2009, 07:49 PM
  #193  
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Default RE: New JetJoe J-Junior 4lbs turbine

I'll check if they have a fix yet . I'd hate to hurt it as it does run well. I'll complete the plane this weekend. I have some new fuel I'll see if the exaust temp drops. I'd like it <760.
Old 04-29-2009, 08:14 PM
  #194  
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Default RE: New JetJoe J-Junior 4lbs turbine

test ran engine with new fuel. 3.5% mobil turbine oil with pure kerosene . motor ran well but exaust temp at top end was the same . Preload still fine . I bought a new HD video camera but it was too dark and I had not enough hands to work it.I 've been told that there is a replacement preload spring coming .
Old 04-30-2009, 08:45 AM
  #195  
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Default RE: New JetJoe J-Junior 4lbs turbine

I wonder what it is going to take to get that EGT down? do you know how cool it runs without the exhaust cone (although that will pretty much kill any thrust that it is producing)? perhaps modifying the tailcone and cutting it down by a couple millimeters will also reduce temps.
Old 04-30-2009, 10:17 AM
  #196  
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Default RE: New JetJoe J-Junior 4lbs turbine

reducing the tailcone size will cool it down but it might not have the power to push my twinjet foamy around the sky.


Jason
Old 05-02-2009, 03:47 PM
  #197  
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Default RE: New JetJoe J-Junior 4lbs turbine

Might want to make sure the temp probe tip is not too close to the tail cone wall. It should protrude into the exhaust stream a bit. I dont know the actual spec but if its too close to the cone, your readings will be high and false.
Old 05-02-2009, 04:36 PM
  #198  
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Default RE: New JetJoe J-Junior 4lbs turbine


ORIGINAL: friedclutch

Might want to make sure the temp probe tip is not too close to the tail cone wall. It should protrude into the exhaust stream a bit. I dont know the actual spec but if its too close to the cone, your readings will be high and false.
Are you sure? With the K type thermocouples used, if the probe is in less than say 3mm it will read a lower temp.

Jason
Old 05-02-2009, 08:50 PM
  #199  
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Default RE: New JetJoe J-Junior 4lbs turbine

It's worth an email to your supplier. A friend of mine has a JJ1400 and that was the cause of some high readings he had. It was measuring the temp of a redhot tailcone instead of the actual exhaust temp.
Old 05-02-2009, 09:06 PM
  #200  
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Default RE: New JetJoe J-Junior 4lbs turbine

Thats an interesting thermodynamic concept- So the exhaust cone , which has one air cooled side, is actually HOTTER than the gas that heats it up- I think we have solved the perpetual motion conundrum.

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