ORIGINAL: dw_crash
The biggest difference was switching from a JetJoe fuel pump to a Hausl280 (WREN MW-54) pump. The engine was rock stable at any throttle setting. It would sit at 100K rpm and not move. The JetJoe pump would wander up and down 500 to 1000 rpm.
So any suggestions would be helpful,
A desperate, DW_Crash
DW Crash
Dave
How did you teach the FADEC to relearn on the new pump? How long were you using the old pump?
Did you run the new Housl pump in for 1-2 hours on 2.4 volt on a loop with filters to collect the gear fines that block the fuel needle jets and bed in the bushes??
By the way Peter's pumps are one of the best worldwide but no one should really use the JJ pumps for any flying or serious operation. Please give the pulse width or voltage when the flames occur.
Fuzzy logic in the FADEC by increasing accel delay and
not adjusting the stabilty delay down gives adverse effect, as you move the throttle quickly but the accel delay counters this, by slowing up the increase in turbine rpm, the pump rpm from pump voltage needs to adjust, so it know X voltage on the pump, give Y rpms on the turbine and safe EGT.
It may become apparent that while all the settings given here previously on this thread may work, some are more productive than others [8D]especially for flying. Flames out the back mean tooo much [:@][:@] fuel from the pump, CC disintegrating or mechanical drag/binding. Flame out!! in the air may mean lost or damaged models. Simply stating parameters given are correct factory settings
[8D] ignores that the factory has not adjusted or run the turbine, ignores many other basic factors such as the pump type. Some in the end like Mike, Chris and others had to ship theirs back to China. Keep trying as the JJ can work as stated here.
Paul