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JetJoe OWNERS thread - 5/5/2005 3:34:32 AM   
EASYTIGER


 

Posts: 7676
Joined: 12/7/2001
From: nyc, NY, USA
Status: offline 		I thought it would be nice to have a new thread sans politics where JJ owners could trade info and experiences. This was suggested by some a while back.
If you just want to slam jetjoe, please start your own thread. If you are a factory rep(as listed in the jetjoe website) your input is welcome.


I did five starts on my JJ yesterday, no problems at all, except the ramp up seems slow, and it would not get past 140k at full bore. Last week when I ran it, 160k was no problem. Ideas?

Jetjoe #563, full autostart, original JJ pump. Single piece tailcone.
       Post #: 1

RE: JetJoe OWNERS thread - 5/5/2005 4:30:37 AM   
Shok



Posts: 3194
Joined: 4/9/2003
From: Heath, TX, USA
Status: offline 		I thought about buying one, does that count?

I got so see one up close last week. It looked good, but it wouldn't run. Lots of fire.
I think alot of the problem was the autostart though.

_____________________________

Ronnie
Jetmach, Flyeagle, JetCat Sales
www.laser-design-services.com

(in reply to EASYTIGER)
       Post #: 2

RE: JetJoe OWNERS thread - 5/5/2005 4:37:38 AM   
angturbines


 

Posts: 23
Joined: 4/15/2004
From: anglesey, UNITED KINGDOM
Status: offline 		Sounds like the pump or the battery pack, the original JJ pumps have been known to give problems,Have a look at the power reading on the FADEC,

(in reply to EASYTIGER)
       Post #: 3

RE: JetJoe OWNERS thread - 5/5/2005 4:45:12 AM   
B1Driver



Posts: 601
Joined: 10/13/2002
From: Abilene, TX, USA
Status: offline 		It was my JJ-1400 at that you saw Shok. Soon as I know what exactly it was I'll post it on the this board. Most likely a failed RPM sensor or the Fadec.

Luis

_____________________________

MORS AB ALTO

(in reply to angturbines )
       Post #: 4

RE: JetJoe OWNERS thread - 5/5/2005 6:28:32 AM   
Johnny Isaiah Woods


 

Posts: 116
Joined: 9/12/2003
From: Hendersonville, TN, USA
Status: offline 		Hello all,
After all of the posts on the jetjoe, negative and positive, I went to the
JJ site and saw the price for the assembled engines and decided to
buy the JJ1400 (engine only). I have a Ram 500 now that is going
on my Boomerang intro and when the JJ1400 comes in I will replace
the Ram 500 and compare the operation and performance. I will use
the Ram pump, solenoids, rpm sensor, thermocouple and ECU. to
run the JJ1400. I will let everyone know the results, good or bad.
The factory is on holliday this week so the engine will not ship until
next monday. Currently my ECU will only go to 150,000 rpms so
the Jetjoe will not put out max thrust. Hopefully I will be able to
get Bob Price to adjust the max rpms at a later date.

(in reply to B1Driver)
       Post #: 5

RE: JetJoe OWNERS thread - 5/5/2005 9:27:55 AM   
MNModels


 

Posts: 260
Joined: 12/21/2003
From: Oudtshoorn, SOUTH AFRICA
Status: offline 		Hi all JJ owners,

Ok last weekend i flew my Draco with the JJ1400. Start and run was no problem. It flew the beast so there is a lot of power. Had 2 flame outs about 4 min into flight. Think it is the filter trapping bubbles. It flew at high altitude (above sea level) as well. No vertical performance as exspected. I am impressed. I will order another 1 to put in my F86. I will take out my homebuilt KJ66 and give you people a review.

I will now fit the JJ in RCARF new turbine trainer the A10X. It is much smaller and lighter. Will be great fun to have an arf jet and turbine motor all for under 2G's and with an added bonus it can be flown of a normal club size runway!!

Regards

_____________________________

MNModels
Exclusive distributor for Skymaster, YAI & JJoe in RSA. XtremeJets customer service

(in reply to Johnny Isaiah Woods)
       Post #: 6

RE: JetJoe OWNERS thread - 5/5/2005 1:13:59 PM   
Skymac



Posts: 811
Joined: 2/22/2002
From: Bowling Green, KY, USA
Status: offline 		Luis, Talked to Sean last night, your motor is just now getting shipped because he forgot that he didn't have my address.

ET - Yeah either your Battery is discharged or your pump is junk, the chinese pump just dosen't have what it takes, also try putting your pump ramp value around 10.




_____________________________

Justin Tidwell

(in reply to MNModels)
       Post #: 7

RE: JetJoe OWNERS thread - 5/5/2005 1:37:44 PM   
EASYTIGER


 

Posts: 7676
Joined: 12/7/2001
From: nyc, NY, USA
Status: offline
quote:

ORIGINAL: B1Driver

It was my JJ-1400 at that you saw Shok. Soon as I know what exactly it was I'll post it on the this board. Most likely a failed RPM sensor or the Fadec.

Luis


So you got one!
The RPM sensor is easy enough to diagnose. Spin the turbine with the ECU on and see if it reads RPM.
What exactly is happening? Beware of some of the advice given out, don't do anything just yet.

(in reply to B1Driver)
       Post #: 8

RE: JetJoe OWNERS thread - 5/5/2005 1:41:09 PM   
EASYTIGER


 

Posts: 7676
Joined: 12/7/2001
From: nyc, NY, USA
Status: offline
quote:

ORIGINAL: Johnny Isaiah Woods

Hello all,
After all of the posts on the jetjoe, negative and positive, I went to the
JJ site and saw the price for the assembled engines and decided to
buy the JJ1400 (engine only). I have a Ram 500 now that is going
on my Boomerang intro and when the JJ1400 comes in I will replace
the Ram 500 and compare the operation and performance. I will use
the Ram pump, solenoids, rpm sensor, thermocouple and ECU. to
run the JJ1400. I will let everyone know the results, good or bad.
The factory is on holliday this week so the engine will not ship until
next monday. Currently my ECU will only go to 150,000 rpms so
the Jetjoe will not put out max thrust. Hopefully I will be able to
get Bob Price to adjust the max rpms at a later date.

Sounds like fun. And you will be flying for a lousy $599.

(in reply to Johnny Isaiah Woods)
       Post #: 9

RE: JetJoe OWNERS thread - 5/5/2005 1:45:48 PM   
EASYTIGER


 

Posts: 7676
Joined: 12/7/2001
From: nyc, NY, USA
Status: offline
quote:

ORIGINAL: andymw54

Sounds like the pump or the battery pack, the original JJ pumps have been known to give problems,Have a look at the power reading on the FADEC,


New pack, and the pump was working up to 160k just last week. Natch, though, the pump is most suspect. I did not check the parameters, maybe today I will have some time to play. The pump voltage is a user adjustable parameter on the Espeill ECU, I take it?

(in reply to angturbines )
       Post #: 10

RE: JetJoe OWNERS thread - 5/5/2005 1:48:00 PM   
EASYTIGER


 

Posts: 7676
Joined: 12/7/2001
From: nyc, NY, USA
Status: offline
quote:

ORIGINAL: MNModels

Hi all JJ owners,

Ok last weekend i flew my Draco with the JJ1400. Start and run was no problem. It flew the beast so there is a lot of power. Had 2 flame outs about 4 min into flight. Think it is the filter trapping bubbles. It flew at high altitude (above sea level) as well. No vertical performance as exspected. I am impressed. I will order another 1 to put in my F86. I will take out my homebuilt KJ66 and give you people a review.

I will now fit the JJ in RCARF new turbine trainer the A10X. It is much smaller and lighter. Will be great fun to have an arf jet and turbine motor all for under 2G's and with an added bonus it can be flown of a normal club size runway!!

Regards


I have the "reaper" version of the draco, and was expecting about the same performance. Don't know what I will put it in next, I don't expect to keep the JJ1200 in that airplane.

(in reply to MNModels)
       Post #: 11

RE: JetJoe OWNERS thread - 5/5/2005 1:54:48 PM   
Skymac



Posts: 811
Joined: 2/22/2002
From: Bowling Green, KY, USA
Status: offline 		No you can't adjust pump voltage past the start ramp proceedure. If it more than likey the FADEC on Luis's motor with eratic RPM readouts which will quickly be diagnosed and repaired. With the Stock pump you may have to run a pump ramp as high as 15 for fast startups where the FW pump is around 5.




_____________________________

Justin Tidwell

(in reply to EASYTIGER)
       Post #: 12

RE: JetJoe OWNERS thread - 5/5/2005 2:21:58 PM   
unknown



Posts: 682
Joined: 8/13/2002
From: Orlando, FL, USA
Status: offline

< Message edited by unknown -- 5/5/2005 4:00:46 PM >

_____________________________

Love this hobby

(in reply to EASYTIGER)
       Post #: 13

RE: JetJoe OWNERS thread - 5/5/2005 3:20:53 PM   
seanreit



Posts: 6768
Joined: 4/17/2002
From: Cedar Park, TX, USA
Status: offline 		Hey guys, sorry to just get into the thread but I wasn't going to go public unless someone brought it out first.

Here are my thoughts on the Jet Joe engine I had in Austin.

In my opinion, the engine is good thus far. I think the upgraded fliteworks pump that was sent is good. I'm fairly certain that the RPM sensor that was in the one I ran is NOT GOOD. Easy enough to replace I suppose, but certainly something that I was su