hi Skymac

i guess you are referring about the JJ1200 engine since i saw your post here:

quote:"We have a few cycles on the engine now. FULL STOCK as recieved from Jet Joe. We are working very close with Joe to fix anything that may be wrong in the short term and long term. We do plan to run it at the max rpm but not for a few runs. Anything that is fixed or changed will be annoucned once we have everything done but untill then im not going that deep. As you can see we are running the Fadec Semi-Auto Unit with the Stock Jet Joe pump and Stock Jet Joe Hand Starter."

since you are closely working woth JJ on this cant he answer this?

well let me tell you about the rpm pickup it is ........ perfect!
still like i said the JJ engine and i am sure you are referring to this engine , only you try to find out silently why the JJ wont go over 80000
so we would be all wrong right? look here: "http://www.rcgroups.com/forums/showthread.php?t=263834&page=36&pp=15"
i allready told this in another forum well known
this engine WONT run over 80000 rpm,s anyway
it is a design fault on jj,s behalf if you read all the posts you can almost figure out in why it does not go over 80000 rpm,s
the fadec is not at fault here , i use many fadecs and the only time it did not work was when the compressor digested the rpm pick up cable ;-)
anyway all the answers are there
wait let me copy and paste it for you:

"like is said i was in contact with thomas there is no use to run it
it is not going anywhere.
eveyone seems to get one of these help yourself
tom tryed to help as much as possible and urged JJ to wait with sales and first straiten out the problems , to make a safe engine
we know it is not going to run as is
it needs lots of changes to have it run
and if you dont have the tools like thomas has forget it
you can run maybe it to idle or slightly more but after this
flames will come out and engine will sease to a stop
here are a few things noticed by now:

combustion chamber is mounted wrong
copy of the wren combustion chamber is wrong
sticks are mounted wrongly
sticks will burn off after about 1 hour of run
all needles need replacing
the lubrication needle is very bad made
pre load is needed, new tunnel
space need to be less for compressor clearance
balancing needs to be re-done
turbine wheel needs to be straitened out so it wont "wobble" anymore
turbine wheel needs to be drilled correctly
front bearing needs to be replaced with a grw one
exhaust needs to be redisigned
all "festo"parts need to be replaced
starter motor burns out needs to be replaced
magnet in spinner is mounted wrongly
fuel pump leaks and does not give any pressure
fuel pump has no noice reduction needs to be filtered

these are just a few things i noticed when tom and me inspected the engine where mine was new and toms engine has runned for about 20 minutes all in all
so as soon jj got this straitened out i think the engine will get above 80000 rpm,s we hope
we dont know what the engine wil do when it is going to produce some actual thrust

i see you made a nice test stand for now you can use 1mm plywood

regards

Sandor