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RE: wren supersport - 7/2/2010 6:10 PM   
BaldEagel



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Status: offline 		I am agreeing with the fact that no action could be taken with the sent back turbine because someone was not there as on post No 95, Keep up Harry.

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RE: wren supersport - 7/2/2010 6:15 PM   
HarryC


 

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Status: offline 		That's right Mike, it's a dreadful crime for some of the staff to go and actually sell the product for a couple of days to keep the business afloat in these most difficult of times.
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RE: wren supersport - 7/2/2010 8:20 PM   
BaldEagel



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Status: offline 		Now your getting the idea Harry , if any buisness relies on just one or two individuals to run, it will not be able to give sufficient support or technical back up to its customers, it rearly is that simple.

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RE: wren supersport - 7/2/2010 8:37 PM   
Eddie P



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Status: offline 		Dang... do you guys whine this much or more "whilst" off line? Just morbidly curious I suppose.

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RE: wren supersport - 7/2/2010 9:13 PM   
lozza1965


 

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Status: offline 		F**k me only i only said i thought that someone should stay behind, as does seem the case does one comment credit so much crap.



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RE: wren supersport - 7/2/2010 9:25 PM   
box55555



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Status: offline 		My how we seem to love to deviate from the thread matter.

Talking to Paul, they have been able to replicate my problem back at Wren HQ. It seems that on very high temperature days it is possible for the electronics to drift off. This seems to manifest itself in the trottle command giving greater than 100% input. This is then not understood by the ECU which then give the shut down command. This would bare out the facts, as Merryfield was hot and some.

Two things to note, me must use the wing bags to shade the electronics in the blazing mid day sun and secondly any funny antics on running, do a re-learn of the trottle first.

All things back in the airframe, but next door is not to keen on the noise. Off to the flying site tomorrow morning, so will update after that.

settings on the returned ECU

Accel delay 012
Deaccel delay 015
Stabalisation delay 050
Pump start Auto+0
Pump ramp 006


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RE: wren supersport - 7/2/2010 10:26 PM   
highhorse


 

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Status: offline 		Uh-Oh.

I can't imagine a that your temps approach what we have here in the southern U.S.

What were the outside temps on your problem days?

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RE: wren supersport - 7/2/2010 10:34 PM   
Eddie P



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Status: offline 		The outside temperatures, when running my Supersport, have approached 41-42c, or 106f. My FADEC resides just aft of my canopy, however, it is below the cockpit tub so it may, in effect, be shielded from the majority of the heat soak. However the cockpit is scale and dark and the paint in general is not reflective, so it would absorb a lot of heat if it weren't for me placing a white towel over the glass when it is sitting.

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RE: wren supersport - 7/2/2010 10:42 PM   
box55555



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Status: offline 		Hi USA

Love the gorgious airframe.

Thankfully we do not get that warm, but my ECU in on the top in direct sunlight. Have learnt my lesson from now on.

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RE: wren supersport - 7/2/2010 11:29 PM   
Gaspar



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Status: offline 		It is the transmitter that you must protect from heat, the ecu is fine up to 85ºC, beyond this temperature it stop working, but don't have drift.

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RE: wren supersport - 7/3/2010 1:18 AM   
causeitflies



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Status: offline 		Here are the pics of the install...

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RE: wren supersport - 7/3/2010 2:30 AM   
davo580


 

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Status: offline 		in the pictures i did not see air holes in the canopy. the more air intake the better

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RE: wren supersport - 7/3/2010 2:35 AM   
c_makhija


 

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From: , INDIA
Status: offline 		Here in India we have had hundreds of flights on Wren turbines. Our winter temperature are 30 degrees C and summer temperatures  are 40 degrees C. So far 1 supersport  and 1 160 had similar problems as described in this thread new out of the box, all different settings were tried but they refused to run reliably, both engines were sent to Wren and both came back running perfect. So far we have had to change no settings on any of the Wrens running here due to high temperatures. yes its always a good idea to cover electronics from direct sunlight.

Chaitanya. 


quote:

ORIGINAL: box55555

My how we seem to love to deviate from the thread matter.

Talking to Paul, they have been able to replicate my problem back at Wren HQ. It seems that on very high temperature days it is possible for the electronics to drift off. This seems to manifest itself in the trottle command giving greater than 100% input. This is then not understood by the ECU which then give the shut down command. This would bare out the facts, as Merryfield was hot and some.

Two things to note, me must use the wing bags to shade the electronics in the blazing mid day sun and secondly any funny antics on running, do a re-learn of the trottle first.

All things back in the airframe, but next door is not to keen on the noise. Off to the flying site tomorrow morning, so will update after that.

settings on the returned ECU

Accel delay 012
Deaccel delay 015
Stabalisation delay 050
Pump start Auto+0
Pump ramp 006




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RE: wren supersport - 7/3/2010 4:07 AM   
gooseF22


 

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move your ecu to the other side of the plane. moving it away from the fuel pump just in case its making electrical or magnetic noise. cant hurt..

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RE: wren supersport - 7/3/2010 4:12 AM   
causeitflies



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quote:

ORIGINAL: gooseF22

cause...
move your ecu to the other side of the plane. moving it away from the fuel pump just in case its making electrical or magnetic noise. cant hurt..

Goose,
Not my plane. I just posted the pics for paulflys4fun...

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RE: wren supersport - 7/3/2010 6:20 AM   
gooseF22


 

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quote:

ORIGINAL: causeitflies


quote:

ORIGINAL: gooseF22

cause...
move your ecu to the other side of the plane. moving it away from the fuel pump just in case its making electrical or magnetic noise. cant hurt..

Goose,
Not my plane. I just posted the pics for paulflys4fun...

Oh. OK..
NVM..

I just spent the last two months working in the Electromagnetic Laboratory testing our new Geo Orbit Satellite system and I saw some neat things about magnetic and electromag interference coming from things... A little fuel pump puts off a field that can affect electronics, especially when power is applied to accelerate. gave me a new appreciation for installations to not stuff things too tight. Our ECUs also give off a bit of EMI as guys know from the 72MHz days. I just wonder if a fuel pump can affect an ECU.. I think maybe yes?



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RE: wren supersport - 7/3/2010 10:27 AM   
BaldEagel



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quote:

ORIGINAL: Eddie P

Dang... do you guys whine this much or more ''whilst'' off line? Just morbidly curious I suppose.


Whine off line NO, but complain when I don't get service YES, there is a difference, and you did ask.

Mike

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RE: wren supersport - 7/3/2010 11:31 PM   
new2jets


 

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Status: offline 		These motors which went back to wren what did they say was wrong ??????
IF it was just ecu setting we would have put that right at home, somthink fishy here !.

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RE: wren supersport - 7/3/2010 11:37 PM   
box55555



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Status: offline 		Hi New2jets

Only the pump and the ECU went back.

Have been down the field and all seems to be well.

Will update on Friday

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RE: wren supersport - 7/5/2010 7:45 PM   
HarryC


 

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Status: offline 		Don't know if the info is of any help at all, may just be spurious coincidence, but these people were having Jetcat problems in some versions of the Boomer http://jmajets.co.uk/board/viewtopic.php?f=3&t=1778

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RE: wren supersport - 7/5/2010 8:16 PM   
Forgues Research



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quote:

ORIGINAL: HarryC

Don't know if the info is of any help at all, may just be spurious coincidence, but these people were having Jetcat problems in some versions of the Boomer http://jmajets.co.uk/board/viewtopic.php?f=3&t=1778



The other problem he mentions with glow plug, well I have solved this problem forever with a spark ignition I developped , works flawlessly... for what its worth.

Roger

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RE: wren supersport - 7/5/2010 11:27 PM   
Xairflyer



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quote:

ORIGINAL: Forgues Research


The other problem he mentions with glow plug, well I have solved this problem forever with a spark ignition I developped , works flawlessly... for what its worth.

Roger


Tell me more ? something myself and a friend was talking about only recently


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RE: wren supersport - 7/6/2010 12:03 AM   
Forgues Research



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quote:

ORIGINAL: Xairflyer


quote:

ORIGINAL: Forgues Research


The other problem he mentions with glow plug, well I have solved this problem forever with a spark ignition I developped , works flawlessly... for what its worth.

Roger


Tell me more ? something myself and a friend was talking about only recently


I replace the glow plug with the same size spark plug, put a resistor (30 ohm) instead of the glow plug, no mods to the ecu or engine . easily put back the glow plug if you wish although I don't know why would want that LOL.

in my case, I only use propane for starting and not the propane/butane mix. it might work but I haven't tried it and the propane only works flawlessly so why change.

But with my setup, I use a needle valve in the propane line instead of a pulsating valve. and you will notice a lot less propane is needed , the needle is opened about .75 of a turn to 1 turn.

After developing my own system I am now having the complete setup made out in china , plug and play....

Roger

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RE: wren supersport - 7/6/2010 12:38 AM   
Xairflyer



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Status: offline 		What are you using as an ignition for the spark plug?

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RE: wren supersport - 7/6/2010 12:43 AM   
Forgues Research



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quote:

ORIGINAL: Xairflyer

What are you using as an ignition for the spark plug?



I use a regular ignition module but without the auto advance and make it fire continuously with a timer I made . As I said I now have them made with everything built in

Roger

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