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HomeTurbineAircraftHelicopterTurbine Helicopters › "Ignition failure" on my wren 44 kero
10-16-2015 05:48 PM  34 months agoPost 1
jettime

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usa

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looking in the manual Im not seeing the cause for this or a solution?

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10-16-2015 07:19 PM  34 months agoPost 2
jettime

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usa

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could it be my batteries im using some Turnigy 2600's I have flown this thing for over 10 hrs no problems no this? I have the ZP25M14 fuel pump was this the one that was giving people troubles?

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10-16-2015 08:17 PM  34 months agoPost 3
Calil

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Brazil

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have you done the prime burner and prime pump before trying to ignite? is it the first time?

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10-16-2015 08:35 PM  34 months agoPost 4
jettime

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nope flew day before last no problem!! this one has got me scratching my head. Do pumps just go out just like that?, upon start up it sounds like it wants too poping and then off and keeps spinning. ECU says "ignition Failure" i know that can mean a lot of things!!!

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10-17-2015 09:34 PM  34 months agoPost 5
KevinChiu123

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Taipei, Taiwan

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Hi, Jettime:

There are several problems that may cause your startup failure

1. low voltage for engine's battery

2. pump is jammed.

3. somewhere in the fuel lines is jammed

4. kero start burner is jammed by accumulation of carbon.

Personally, I have met all of the above.

Good luck.

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10-18-2015 02:09 AM  34 months agoPost 6
Calil

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Brazil

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any particle can stop the pump. disconect the fuel line from the turbine and test the prime to both solenoids and you will know if it's a pump failure. simple and quick test.

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10-18-2015 02:49 PM  34 months agoPost 7
Jim Cimino

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NE Pennsylvania

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Have you tried increasing the pump start point?

Team Synergy, Team Scorpion, No good deed goes unpunished

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10-19-2015 04:00 PM  34 months agoPost 8
jettime

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usa

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thanks guys will try all the above.If it is a fuel pump are they still obtainable?

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10-19-2015 09:34 PM  34 months agoPost 9
Jim Cimino

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NE Pennsylvania

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You can still get fuel pumps from the UK, but you might try giving Ron Ballard a try as he might still have some inventory.

Team Synergy, Team Scorpion, No good deed goes unpunished

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11-04-2015 05:36 PM  33 months agoPost 10
jettime

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usa

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How do you guys run the pump backwards i under stand it is with a D cell battery. I can hear the valves opening though. the glow gets hot, no go on the fuel pump from Ron, no big deal and I understand. What I don't understand is why we don't have a US service agent.. Jet cat has one? now this fuel pump is going to cost more.

I have 8hrs on this engine and this happens not very happy with Wren right now!!!

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11-05-2015 11:11 AM  33 months agoPost 11
Sparkhead

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Melbourne Australia

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Don't worry its not just a Wren problem as I had to run my Jetcat pump backwards a few times when I first started using my heli engine. The wren lads might have a different opinion on this but I used to give mine a quick blip in reverse polarity on a 6 cell nicad pack. just make sure you have removed the pump out of the fuel system before hand. I had to do this about 3 times in the early days. Because the ECU is sending such a low voltage to the pump there isn't much torque to get the motor spinning if there is even a tiny particle in the gears.

just make sure its only a quick blip on the battery. I'm talking like a tenth of a second.


Mick.

Robbe & Futaba.

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11-05-2015 03:28 PM  33 months agoPost 12
jettime

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usa

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Ok thanks I appreciate the help, is anyone reconditioning these pumps?

I know it would be better to have a new than a flame out because of a pump.

200+ a pop is not very good and only had 8hrs on it?

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11-05-2015 05:25 PM  33 months agoPost 13
jettime

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usa

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Mick

Did exactly what you said and it runs like a top had re-prime the lines no biggy!!!just a little bump a couple of time's and things are good..

I owe you a Beer!!

Next question does certain fuel oil mixture aggravate this problem I use BP 2380 and have no ill effects what so ever..the burner when I pulled after 8hrs looked very good. Also winter is coming and I have other interest so the helicopter is not going to get run much,storage for the turbine is there any suggestions or should I just plan on running it through the winter.

thank you very much for your time

mike

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11-05-2015 06:51 PM  33 months agoPost 14
Sparkhead

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Melbourne Australia

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No I don't think the different types of oil would make a difference. It's more than likely bits out of your fuel drum. You may even have to do it again in the future until your pump wares in. From my experience it only ever happens at start up, I've never had a flame out once everything is up and running.

As for storage, I just let mine sit after the last use until I want to use it next time. I had my engine sitting here for a few years as I had to do a rebuild and I just put new batteries on and fired it up. Didn't even flush the old fuel out. I don't get the freezing winters here though, our lowest temp would be -1 Celsius at worst.


Mick.

Robbe & Futaba.

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11-05-2015 10:08 PM  33 months agoPost 15
jettime

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usa

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thanks all the same just put a tank through the engine so everything must be Ok so far. That is a very interesting machine you have there was that a mod or did your make it your self?

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11-06-2015 03:34 AM  33 months agoPost 16
Sparkhead

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Melbourne Australia

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It's a Robbe Cuatro helicopter with a conversion frame from Jetcat originally. Then I bought another frame set from a company called turbine technics which is what it is now.


Mick.

Robbe & Futaba.

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11-09-2015 05:26 PM  33 months agoPost 17
jettime

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usa

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I also noticed a little fuel under the engine upon further review the fuel was coming out of the plug, the o-ring was deformed and damaged. This might have been the problem on the starts and the starter was just coincidence?

my question is also is there a o-ring on top and a o-ring on the bottom right ? made since right?

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