55.000rpm on a 3000AES!!

55.000rpm on a 3000AES!!
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All Forums >> RC Airplanes >> RC Jets >> Turbine Clinic >> SimJet Turbine Direct Support >> 55.000rpm on a 3000AES!!

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55.000rpm on a 3000AES!! - 4/2/2006 8:42:51 PM

beljet

Posts: 5
Joined: 4/2/2006
From: , BELGIUM
Status: offline

I have the following problem : today i started my 3000aes after i finished building my boomerang xl, after a few starts i finnaly found the right amount of gas to get starting temperture.
First the idle was going up and down between 25.000 and 34.000, Is this normal?
When i went to full power everything good, back to idle it keeps turning at 55.000rpm and i tried more times full power to idle, nothing changed.
What could be wrong?
I followed the steps for calibrating the stick and transmitter correct.
I use a fadec ecu from digitech

Post #: 1

RE: 55.000rpm on a 3000AES!! - 4/3/2006 2:18:26 AM

rcav8tr

Posts: 965
Joined: 12/18/2001
From: Milton, ON, CANADA
Status: offline

Hi Beljet

It sounds as if your ecu has not been calibrated to the pump. Calibrate it as follows:

1) Start the engine as normal.
2) Slowly cycle the throttle from idle to full and back to idle three or four times. By slowly I mean a click or two per second.
3) shutdown the engine and let it cool.
4) Reset the ecu and re-start the engine. Your throttling problem should be gone.

If this doesn't solve your problem, contact Kim at SimJet (3d@simjet.com) or Sandor at Digitech.

Good Luck,
Ed

_____________________________

Ed Miedzybrocki - Great Northern Models - 905-320-7979
Dealer for SimJet, Skymaster, BVM, JetCat, Yellow and much more.

(in reply to beljet)

Post #: 2

RE: 55.000rpm on a 3000AES!! - 4/3/2006 12:00:20 PM

cairoman

Posts: 743
Joined: 12/6/2001
From: Nicosia, CYPRUS
Status: offline

Please excuse me for intruding,

What make of radio do you own? Are you using a Simjet or a Gaspar FADEC?

If yusing a Gaspar FADEC, do ensure your pulses read 900μS for minimum throttle and 1900 - 2100 μS at maximum throttle.

Stability Delay should read 50.

regards,
Chris

_____________________________

IJMC-Cyprus, JET-TRONICS' REP
WREN'S REP in Cyprus

(in reply to rcav8tr)

Post #: 3

RE: 55.000rpm on a 3000AES!! - 4/3/2006 2:10:28 PM

Vampire

Posts: 705
Joined: 12/7/2001
From: Bath, PA, USA
Status: offline

Hello Beljet,

First, the correct idle for a Simjet - 3000 is approx. 30,000 > 31,000 rpm. It is recommended that you contact Digitech for asistance as Simjet currently uses and supports the GASPAR Fadec ECU which learns the pump you are intending to use. I believe that the Digitech will do the same. A call to Kim at Simjet-Denmark may be of value to you as well as Ed has suggested.

Best Regards,

_____________________________

Kerry J. Sterner
US SimJet, LLC - scaledesigner@enter.net

(in reply to cairoman)

Post #: 4

RE: 55.000rpm on a 3000AES!! - 4/4/2006 11:11:03 AM

digitech

Posts: 1797
Joined: 8/23/2004
From: klimmenlimburg, NETHERLANDS
Status: offline

quote:

ORIGINAL: Vampire

Hello Beljet,

First, the correct idle for a Simjet - 3000 is approx. 30,000 > 31,000 rpm. It is recommended that you contact Digitech for asistance as Simjet currently uses and supports the GASPAR Fadec ECU which learns the pump you are intending to use. I believe that the Digitech will do the same. A call to Kim at Simjet-Denmark may be of value to you as well as Ed has suggested.

Best Regards,

Hi
the Digitech ECU is basically a "enclosed" ecu.
it has different hardware and has a bit more advanced electronics on board.(kerosene ready)
it has exactly the same software as they are programmed by Gaspar Espiell
so it behaves the same as the Gaspar ecu

my guess is you have a problem/restriction somewhere in your fuel line(s)
or you changed the fuel lines length since it first run
just run it again
go from idle to full power in 10 seconds -stay there on full power for 10 seconds , then go to idle again in 10 seconds

and for my personal setting i would set the idle to 32000 rpm the turbine runs much better on this point
the thrust at 32000 is only 350 grams (0.3N)
but faster spool up , and better stabilize

is your system 12 volts?

@ Kerry
US SimJet, LLC

Simjet should support all their customers regardless the ecu they are using
a bit more investigation would have revealed that the a.t.c.u’s delivered by us worked flawless and never missed a "beat".
and where delivered to Simjet at a time that the FADEC ecu was not "Available"
but because of gentleman’s agreements we did not deliver them as soon the Gaspar fadec where back on track.

Best Regards Sandòr Kruise

< Message edited by Sandor -- 4/4/2006 11:22:22 AM >

_____________________________

Sandor Kruise
Dealers for:JetCat,Graupner,Futaba,Fei-Bao,Pro-Lynx,Airpower,Jets-munt,Xicoy,Jet-1A,Composite-ARF.
"Home of the Pro-Lynx Gears"

(in reply to Vampire)

Post #: 5

RE: 55.000rpm on a 3000AES!! - 4/4/2006 1:03:11 PM

Vampire

Posts: 705
Joined: 12/7/2001
From: Bath, PA, USA
Status: offline

Hello Sandor,

Thank you for the information as to the Digitech's capabilites and programing. I had not been advised of the use of the Digitech ECU nor have I seen one in service to date on a SimJet therefore, the recommendation for the customer to discuss with you and or Kim - SimJet -DK.

Since clarifying that this ECU functionality is the same as GASPAR's, we can be more helpful.

Brg.

_____________________________

Kerry J. Sterner
US SimJet, LLC - scaledesigner@enter.net

(in reply to digitech)

Post #: 6

RE: 55.000rpm on a 3000AES!! - 12/30/2006 1:26:33 PM

MAXIAN

Posts: 11
Joined: 5/3/2004
From: ROCCASECCA, ITALY
Status: offline

Hello friends!! i have the same problem with my simjet 3000. After the start at original 34000 rpm it slowly go up, last flight i landed and the turbine was at 40000 rpm with very difficult hight speed in final. Mine have the original ecu from simjet, with infrared transmitter . the turbine is the n. 04361 date 12/11/2003. Maybe have the same problem with the pump?
Thank you

(in reply to Vampire)

Post #: 7

RE: 55.000rpm on a 3000AES!! - 1/2/2007 3:53:21 PM

Vampire

Posts: 705
Joined: 12/7/2001
From: Bath, PA, USA
Status: offline

MAXIAN,

If you have the older Aluminum Cased FADEC- D2 from SIMEJT then you cannot "train" the pump to the ECU as previosusly described.

This info is embeded into the ECU sofetware and can not be changed by the owner.

It appears that perhaps you have a pump related issued, i.e. sticking pump seal, etc.

_____________________________

Kerry J. Sterner
US SimJet, LLC - scaledesigner@enter.net

(in reply to MAXIAN)

Post #: 8

RE: 55.000rpm on a 3000AES!! - 1/2/2007 4:29:49 PM

MAXIAN

Posts: 11
Joined: 5/3/2004
From: ROCCASECCA, ITALY
Status: offline

Thank you.
Yes i have fadec d2 with alluminiun case.
So, i understant i have a problem with the pump. Maybe it is not precisely in the injection, that is right?
If its this the problem i must change the pump?

Regards

(in reply to Vampire)

Post #: 9

RE: 55.000rpm on a 3000AES!! - 1/3/2007 3:26:32 AM

Gary Arthur

Posts: 890
Joined: 1/2/2002
From: Hamilton, ON, CANADA
Status: offline

quote:

ORIGINAL: MAXIAN

Thank you.
Yes i have fadec d2 with alluminiun case.
So, i understant i have a problem with the pump. Maybe it is not precisely in the injection, that is right?
If its this the problem i must change the pump?

Regards

I had a similar problem with a 1200. My flightworks 100 pump started to act up. During a flight, it was losing power(RPM). While holding the stick at full, it was actually recalibrating the pump (trying to get full RPM). Then when it came time land, it would not return to idle. Changed out the pump and everything was fine.

(in reply to MAXIAN)

Post #: 10

RE: 55.000rpm on a 3000AES!! - 1/4/2007 10:09:55 AM

MAXIAN

Posts: 11
Joined: 5/3/2004
From: ROCCASECCA, ITALY
Status: offline

My turbine have 8 hrs of run, maybe, the pump need as mentionated in the owners manual a service for clean and re-hone the brushes? for this service, also for starter motor, needed to immersing the pump in a glass of water allowing the pump to run with 1,5 volts.
some of you have tried this procedure?

Thank you

(in reply to Gary Arthur)

Post #: 11

RE: 55.000rpm on a 3000AES!! - 1/10/2007 8:17:27 PM

Vampire

Posts: 705
Joined: 12/7/2001
From: Bath, PA, USA
Status: offline

MAXIAN

Yes, try cleaing pump motor with the 1.5 v battery in water first. If that does not fix the problem then contact SIMJET Denmark for a new pump.

You cannot make ANY pump voltage adjustments with the ECU you have.

No need to perform this cleaning on the starter motor but you can if you wish.

Brg.

_____________________________

Kerry J. Sterner
US SimJet, LLC - scaledesigner@enter.net

(in reply to MAXIAN)

Post #: 12

RE: 55.000rpm on a 3000AES!! - 1/11/2007 7:32:06 AM

MAXIAN

Posts: 11
Joined: 5/3/2004
From: ROCCASECCA, ITALY
Status: offline

Thank you, i will do this first.
So another matter, why simjet canged all the sistem ecu from simjet fadec 2 to gaspar ecu? I dont understant.
Thank you

(in reply to Vampire)

Post #: 13

RE: 55.000rpm on a 3000AES!! - 1/11/2007 12:39:50 PM

Vampire

Posts: 705
Joined: 12/7/2001
From: Bath, PA, USA
Status: offline

Hi MAXIAN,

The change in the ECU is for the exact reason you and I have been discussing. The new GASPAR ECU allows for the CUSTOMER to make MANY changes in the way his engine starts and runs to compensate for such things as high elevation operation, pumps that are have ware on them, start ramp times etc., etc. You cannot do this with the old FADEC D2, only the factory or service center can.

This allows the customer to keep the engine with-in proper running limits himself at the field.

It was a good decssion by SIMJET as almost every other engine mfr. has had these capabilites as well and SIMJET needed to keep pace.

Hope this answers your question.

Have a good day.

Brg.

_____________________________

Kerry J. Sterner
US SimJet, LLC - scaledesigner@enter.net

(in reply to MAXIAN)

Post #: 14

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