ORIGINAL: seanreit
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 surprised to see.
I did get the engine to run really good on one run out of about 20 attempts, I ran it up to half throttle and when I brought it down from half it shut off.
I am fairly certain that the problems I had getting it to start were RPM sensor and/ or Fadec related, not the engine. I gave the newly boxed engine to my assistant a couple days ago to send it back and I didn't realize I didn't have an address to send it to, so Justin is sending me the correct address to send it back today to get checked over. I should have it back next week and will run it up next weekend.
Based on my experiance thus far there is no reason not to get one if you have an application for it. It looked and when it ran, ran like any other turbine I've ever run.
Considering that I've had problems with just about every turbine manufacturer for one reason or another, including RAM, Jetcat, and Merlin, I think the problem I had should be easy to overcome.
FWIW,
Sean
Did you buy the engine new? Or was it mussed with somehow?
Seems unusual, that the RPM sensor is bad, but not impossible. I would check that it is mounted properly, and that the magnet in the spinner is mounted as it should be, and try running a magnet around the inside of the intake to degauss it. I had a RAM that would not run until that was done, as it had gone through an airport scanner when it was shipped that changed the magnetism there. If you are running an optical sensor, who knows?
When my Espeill ECU went bad, it was due to a bad solenoid provided by jetjoe. It manifested itself very clearly with a burned out MOSFET. It was no fault whatsoever of the ECU itself. I would tend to think that a solid-state piece of electronics like that is unlikely(but not impossible) to give false readings like yours seems to be doing, I would look at the sensors attached to it first, for sure.
I agree about teething troubles being pretty common with all brands, been there, done that, but I would just as well let that subject drop, lest we have yet ANOTHER one of "those" threads.
What SN is your engine?