Thanks guys.
Bob, thank you for a quick answer, but i live in Europe.
Im just afraid that the phone call would last long time, since we do not have a turbine flyer population and all i know i learned by my self.
My story goes like this.
I purchased a jetcat p 120, and absolutely have no problem with it.
After that, i wanted a smaller turbine.
Since im a aeronautical engineer, i decided to buy ram 500, since i understood that it do take some skill to use them.
I learned very little from my cat. It start every time, runs fine, cools it self....
Ram was another matter. I bought it without batteries and as soon as i conected a 2 s lipo it burned the starter engine.
I carefully changed the speed 300 engine and switched to 2 s life.
I tried to start it few times,but it was completely dead.
I disambled the outer case and saw that glow plug element was not out enough to protrude in to combustion chamber.
As soon as i extracted it little more, i got it to run.
It runed fine, but the problems with reliable start was still present.
After few starts, i had an issue with propane valve.
It worked when gas tank was empty, but when i filled it with gas, it didnt want to open. I exchanged the valve but nothing changed.
At that time, i pulled out the gas tank and complete gas instalation, including the gas valve, and start starting it directly from gas can.
I open a gas only to hear that it flows, and than push the start button.
After hearing that ignition started, i just open a gas little more.
It worked every time.
The main thing to know is that glow plug ignites only at the beggining of start process and it ignites for only one second.
So if you do not have a ignition at the very first moment, it wont start at all.
However, the problems with starter still persisted.
I echanged two speed 300 starter motors and a very few o rings.
Since i own my own hydraulic systems repair shop, i was able to find a high quality viton o ring, wich is still on my engine, lasting over 20 starts .
On many occasions i had problem that when ecu starts the starter motor, the voltage drops and since the voltage drop is detected, ecu aborts the start.
The cure for that was that i spin the motor on hand held unit, and to start the starting sequence, during his spinning.
That routine worked nice but recharging the batteries after every flight was almost a must.
At the end, i instaled a relay wich was driven by ecu starter cable, but i powered the starter by separate 6 v lead acid accu,wich i conect by a jack, while starting.
It worked fine, but i was anoyed by fact that i had to conect the very same battery also during shut down, just to let ecu cool the engine down.
Sadly, i crashed my jet last year, but now ram is being fitted to a new airplane.
Now, here is my question,
Why my propane valve does not work when the gas tank is full?
Is it posible to revork the ecu, so i could switch to 2s lipo?
Can a starting routine be changed so the spining of starter motor start with some kind of soft start?
The last would help with voltage drop and surely help with speed 300 life span.
My ecu is with 03 version.
All sugestion are highly apreciated, since, guys, im all alone here with my turbines.
Thank you