Simjet 3000 flame-out in a Composite Flash
01-06-2010 | 03:09 PM
#1
Simjet 3000 flame-out in a Composite Flash
Hi!
I experienced one day a flameout on my Composite Flash with Simjet 3000 as powersourche. Was climbing to an high altitude and went almost straight downwards with throttle in idle position. After the dive I went straight and wanted to put on some thrust and then I saw a white puff and then thin trail of smoke. The engine had stopped and I went around for a landing.
After I had landed I checked the hoppertank and the fueltubing, all with no airbubbels. I tried to start the engine and it came alive as nothing had happened. During the start-up, lage flames came out of the thrusttube. I guess the reason for that was fuel in the pipe after the engine got its flame out. Anyway, the engine performed perfect and I went home for some thinking.
My conclusion is that the engine didnt perform fast enough rpm countdown during my dive, the pump was feeding the engine with the same amount of fuel as it was idling. To much compressed air was pumped into the engine due to late rpm countdown and the flame went out.
Is there someone who has experienced the same situation?
I experienced one day a flameout on my Composite Flash with Simjet 3000 as powersourche. Was climbing to an high altitude and went almost straight downwards with throttle in idle position. After the dive I went straight and wanted to put on some thrust and then I saw a white puff and then thin trail of smoke. The engine had stopped and I went around for a landing.
After I had landed I checked the hoppertank and the fueltubing, all with no airbubbels. I tried to start the engine and it came alive as nothing had happened. During the start-up, lage flames came out of the thrusttube. I guess the reason for that was fuel in the pipe after the engine got its flame out. Anyway, the engine performed perfect and I went home for some thinking.
My conclusion is that the engine didnt perform fast enough rpm countdown during my dive, the pump was feeding the engine with the same amount of fuel as it was idling. To much compressed air was pumped into the engine due to late rpm countdown and the flame went out.
Is there someone who has experienced the same situation?
01-07-2010 | 03:16 AM
#2
RE: Simjet 3000 flame-out in a Composite Flash
ORIGINAL: Uefly
Hi!
I experienced one day a flameout on my Composite Flash with Simjet 3000 as powersourche. Was climbing to an high altitude and went almost straight downwards with throttle in idle position. After the dive I went straight and wanted to put on some thrust and then I saw a white puff and then thin trail of smoke. The engine had stopped and I went around for a landing.
After I had landed I checked the hoppertank and the fueltubing, all with no airbubbels. I tried to start the engine and it came alive as nothing had happened. During the start-up, lage flames came out of the thrusttube. I guess the reason for that was fuel in the pipe after the engine got its flame out. Anyway, the engine performed perfect and I went home for some thinking.
My conclusion is that the engine didnt perform fast enough rpm countdown during my dive, the pump was feeding the engine with the same amount of fuel as it was idling. To much compressed air was pumped into the engine due to late rpm countdown and the flame went out.
Is there someone who has experienced the same situation?
Hi!
I experienced one day a flameout on my Composite Flash with Simjet 3000 as powersourche. Was climbing to an high altitude and went almost straight downwards with throttle in idle position. After the dive I went straight and wanted to put on some thrust and then I saw a white puff and then thin trail of smoke. The engine had stopped and I went around for a landing.
After I had landed I checked the hoppertank and the fueltubing, all with no airbubbels. I tried to start the engine and it came alive as nothing had happened. During the start-up, lage flames came out of the thrusttube. I guess the reason for that was fuel in the pipe after the engine got its flame out. Anyway, the engine performed perfect and I went home for some thinking.
My conclusion is that the engine didnt perform fast enough rpm countdown during my dive, the pump was feeding the engine with the same amount of fuel as it was idling. To much compressed air was pumped into the engine due to late rpm countdown and the flame went out.
Is there someone who has experienced the same situation?
i asume you have a Gaspar Fadec?
read out the last minute and see what happened.
i asume with this cold weather the dive on idle , cooled the engine down.
as soon you throttle up , the engine struggles to cope and flames out.
i never set my engines on idle during flights , i see that if you keep about 25% throttle.
the engine will pickup nicely and very fast.
the residue thrust with 25% is less then 2 kilos.
01-07-2010 | 07:57 AM
#3
RE: Simjet 3000 flame-out in a Composite Flash
Hi Uefly,
I agree with comments presented and in addition you may want to raise the Deceleration delay to slow the RPM decay for a bit longer in the dive.
The ECU Deceleration default is generaly 15. Raise it to 20 > 25. This will help as well.
I have experianced this condition as well and it was traced to an air leak in my UAT. This was due to the UAT leaking air at the CAP. Removed the cap and placed more Teflon thread tape on it, rpelaced the cap and....no more issues.
Bottom line, If you can confirm that your UAT was FULL when you landed, this is likely not your cause.
While your conditon may be one or both of these, if your flying in cold weather, condiser evaluating BOTH conditions if your suing a UAT.
Best Regards,
I agree with comments presented and in addition you may want to raise the Deceleration delay to slow the RPM decay for a bit longer in the dive.
The ECU Deceleration default is generaly 15. Raise it to 20 > 25. This will help as well.
I have experianced this condition as well and it was traced to an air leak in my UAT. This was due to the UAT leaking air at the CAP. Removed the cap and placed more Teflon thread tape on it, rpelaced the cap and....no more issues.
Bottom line, If you can confirm that your UAT was FULL when you landed, this is likely not your cause.
While your conditon may be one or both of these, if your flying in cold weather, condiser evaluating BOTH conditions if your suing a UAT.
Best Regards,
01-07-2010 | 08:21 AM
#4
RE: Simjet 3000 flame-out in a Composite Flash
Another trick you can use is, when you learn the Tx to the ECU, only raise the throttle trim to halfway during the set up. This has the effect of having the idle at half trim, you advance it to full, so increasing the turbine speed a little when on taxi & flying. Just reduce the trim to halfway for landing
01-07-2010 | 09:03 AM
#5
RE: Simjet 3000 flame-out in a Composite Flash
ORIGINAL: Jascat100
Another trick you can use is, when you learn the Tx to the ECU, only raise the throttle trim to halfway during the set up. This has the effect of having the idle at half trim, you advance it to full, so increasing the turbine speed a little when on taxi & flying. Just reduce the trim to halfway for landing
Another trick you can use is, when you learn the Tx to the ECU, only raise the throttle trim to halfway during the set up. This has the effect of having the idle at half trim, you advance it to full, so increasing the turbine speed a little when on taxi & flying. Just reduce the trim to halfway for landing
that can bite you!
i had this set once and as soon i gave full throttle and banked side rudder left my engine flamed out , due to the max pulse was more then programmed.
i know sounds weird , but if the fadec goes over the 100% it will go back to Engine off
01-07-2010 | 09:39 AM
#6
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From: Hamilton,
ON, CANADA
RE: Simjet 3000 flame-out in a Composite Flash
ORIGINAL: digitech
that can bite you!
i had this set once and as soon i gave full throttle and banked side rudder left my engine flamed out , due to the max pulse was more then programmed.
i know sounds weird , but if the fadec goes over the 100% it will go back to Engine off
ORIGINAL: Jascat100
Another trick you can use is, when you learn the Tx to the ECU, only raise the throttle trim to halfway during the set up. This has the effect of having the idle at half trim, you advance it to full, so increasing the turbine speed a little when on taxi & flying. Just reduce the trim to halfway for landing
Another trick you can use is, when you learn the Tx to the ECU, only raise the throttle trim to halfway during the set up. This has the effect of having the idle at half trim, you advance it to full, so increasing the turbine speed a little when on taxi & flying. Just reduce the trim to halfway for landing
that can bite you!
i had this set once and as soon i gave full throttle and banked side rudder left my engine flamed out , due to the max pulse was more then programmed.
i know sounds weird , but if the fadec goes over the 100% it will go back to Engine off
Sounds like the acc delay may be too agressive.
01-07-2010 | 10:15 AM
#7
RE: Simjet 3000 flame-out in a Composite Flash
Hi!
Thank you for sharing your thoughts with me. I want to learn and so I do reading all the comments
. I think I will raise the throttle idle setting in flying mode and idle in take-off and landing mode, I dont have the Gaspar Fadec ECU, only the original one with one masterswitch and with green, yellow and red diodes on 
. My second Simjet 3000 is in Sweden, http://www.csturbine.se/ for an upgrade to Gaspar ECU and for a forthcoming season check.
Thank you for sharing your thoughts with me. I want to learn and so I do reading all the comments
. I think I will raise the throttle idle setting in flying mode and idle in take-off and landing mode, I dont have the Gaspar Fadec ECU, only the original one with one masterswitch and with green, yellow and red diodes on . My second Simjet 3000 is in Sweden, http://www.csturbine.se/ for an upgrade to Gaspar ECU and for a forthcoming season check.
01-07-2010 | 10:18 AM
#8
RE: Simjet 3000 flame-out in a Composite Flash
ORIGINAL: digitech
that can bite you!
i had this set once and as soon i gave full throttle and banked side rudder left my engine flamed out , due to the max pulse was more then programmed.
i know sounds weird , but if the fadec goes over the 100% it will go back to Engine off
ORIGINAL: Jascat100
Another trick you can use is, when you learn the Tx to the ECU, only raise the throttle trim to halfway during the set up. This has the effect of having the idle at half trim, you advance it to full, so increasing the turbine speed a little when on taxi & flying. Just reduce the trim to halfway for landing
Another trick you can use is, when you learn the Tx to the ECU, only raise the throttle trim to halfway during the set up. This has the effect of having the idle at half trim, you advance it to full, so increasing the turbine speed a little when on taxi & flying. Just reduce the trim to halfway for landing
that can bite you!
i had this set once and as soon i gave full throttle and banked side rudder left my engine flamed out , due to the max pulse was more then programmed.
i know sounds weird , but if the fadec goes over the 100% it will go back to Engine off
It works perfectly now in my Boomerang Nano.
