RE: Wren fadec issues?
 

No problem with FADEC here on 72mhz Futaba PCM. 40 + hrs SS. Never heard there was any problems. Simple but effective controller IME.

HTH

Joe

RE: Wren fadec issues?
 

Digitech,

You mention in a post on the first page, of problems when the turbine wires run close to Digital servo wires or servos--- is this a NO NO to instal that way ??? Reason i ask, Assembling my first turbine model, Rookie 11, Have put a 3/4 carbon wing tube 200mm long, along the bottom of the fusalage, between the two formers, from the front to the back, engine bay, plan on running the turbine wires and 7 digital servo leads through this carbon tube !!!!!!!!
Turbine a Behotec J66, ECU projet---
Thanks for your help, Jay.

RE: Wren fadec issues?
 

Yes, keep all servo wires away from the FADEC.

Be VERY careful with carbon, do extensive range checks first.

RE: Wren fadec issues?
 

And Paul is talking from experience..:D

Paul, see you at the bar a week Saturday!

J

RE: Wren fadec issues?
 

I would urge caution when blaming the FADEC unit or Futaba gear etc when we are not privvy to the complete install picture - I have seen photos posted on here of peoples fresh install and seem some absolute horrors that are an accident waiting to happen.

The modern trend of having all the valves, pumps etc beautifully arranged on a carbon plate may look pretty but all the wiring and connectors are hidden. The chances of something visibly wrong with a FADEC or pump etc are virtually nil - the chances of a chaffed wire or plug and socket coming apart are very much higher but you wouldnt be able to see it!

If you were to regularly remove the gear plate to inspect it you would be putting unecessary strain on the wires and connectors.

RE: Wren fadec issues?
 

As you know Jason..i am talking from very bitter experience!

See you at the bar..i think i owe you a couple ;)

RE: Wren fadec issues?
 

I have two wren 54’s home built one 12# and one14#, my 12# has over 35 hrs running time. I had one Gaspar FADEC that the range was ½ of what it was with another Gaspar FADEC. I sent it to Sara and when it came back after being repaired it works fine now.
I do a good range check with and with out the turbine running, I do a 360 deg. range check and have found the range to change as the plane is rotated around.
I normally get 150 to 200 paces away with the antenna at 7 inch’s high with the plane about 4 ft off the ground. George

RE: Wren fadec issues?
 

Tempted to agree here....Just been up to Wren HQ...Open day tour the workshops...catch up on ll the news...etc....i think this photo says a lot ..re the proximity of Gaspars FADEC to the Futaba reciever..

RE: Wren fadec issues?
 

interesting, is it posible that the gaspars can just go bad after say 10 good flights?


I have a gaspar in a hard plastic case supplied with the wren 44. What version is this, and whats the difference to the version in the above pic?

Hope to have the wren pipe this week to test fly it next weekend.

RE: Wren fadec issues?
 

What problems are you having, and is it with the digitech ecu?

RE: Wren fadec issues?
 

I assume your using the Digitech with the hard blue case?


I didnt get to test fly my hawk this weekend, but hopefully tommorow. So far I have had about 45mins of running, taxing the model, and rangechecks are all acceptable.

RE: Wren Digitech issues? Now with poll
 

I use a green ECU (similar to the one tangled in the heli) with an SS & JR 388 radio on 36 mhz with no problems. Sandor said that's the one he makes so I voted - Digitech works perfect for me. Does the ECU effect landings? If so I may have a problem [:o] - John.

RE: Wren fadec issues?
 

Some people are getting confused here.

Green or Blue hard case box type ECU is the DIGITECH.

Flat and thinner heatrshrunk ECU, the one with the paper under the clear plastic heatshrink is the GASPAR ecu. Gaspar has a new version now in a CNC ally case.

RE: Wren fadec issues?
 

Yep, like me. Why not just ask hard case or heat shrink wrapped?

Mine must be a Gaspar then. Can I have my vote back? - John.

RE: Wren fadec issues?
 

well had 2 good starts and 2 good testflights today with my hawk wren 44, digitech ecu, JR radio, ran perfectly. :):)

only time will tell now, fingers crossed

RE: Wren fadec issues?
 

you cant steer with your fingers cross , we jetjocks on mode 2 can:D

RE: Wren fadec issues?
 

another 3 flights today, unreal performance from the wren 44 gold!! so far so good.

RE: Wren fadec issues?
 

so what is the point again?
you await a crash and blame the ecu?...
dont get your methods

RE: Wren fadec issues?
 

Point? I have seen 2 posible dogy digitechs, and 1 that simply stopped working correctly luckily on the ground. These people wont use digitechs anymore and havent had a problem after changing the gaspars. To me all this turbine stuff is new, seeing others localy have issues I was abit worried and still am. Original point of thread was to find out if others have had problems, and if so, what could be the posible reasons behind them.

If my digitech starts playing up, like start spooling up the power when taxiing and the only way to stop it is to flick the servo operated cutoff valve, stop working altogether, or cause problems with the reciever, yes with sufficient evidence i would blame the ecu.

are you suggesting i shouldnt wait for a crash and just change out the ecu now for a gaspar ?

RE: Wren fadec issues?
 

so if you read this thread all the way.
can you see where the problems are?.
eather this must be a lcuky number of 2 ecu,s going bad.
or its the earth spinning in the wrong direction.
i have no idea do you?.
you can alsways buy a new ecu if it makes you feel better.
i dont see a point to all of this.
an issue is if you have turbines flaming out when taking of from tarmac and no one knows why..
first they blame the ecu , afterwards it is static discharge from the rubber on tarmac and the fuel.(other brand)
weird thing is our ecu does not react to this static...
like i said before there are over at least 1000 users with a Digitech/Wren ECU and yes i am sure that there are a few with problems.
but you popping out every 3 flights that is is still working , goes a bit far for me..
and secondly making a poll? sounds more like a bashing then finding a problem..
i leave it with this.
for me this thread can be closed makes no sence

RE: Wren fadec issues?
 

I guess its different being a manufacturer, or being the guinea pig end user. Maybe if you were the customer, forking out lots of money you would relise that there is nothing wrong doing a little research on a product before you buy it. In no means have I "bashed" digitech in this thread, if that ever was the case, i wouldnt be using one.

For me im very please to see that its going well so far, thus the need to mention it, especialy after having seen 3 jet models at our club have posible problems with this particular version ecu.

RE: Wren fadec issues?
 

97 Rookie II flights/18 hours running this season, tarmac, concrete, grass, public shows, club flying, fly-in's, uncle Tom Cobbley and all..........zero flameouts, 100% reliability.

Rob.

RE: Wren fadec issues?
 

Sometimes it isn't a technical problem that causes the problem but the way the person is using it....

Sandor, if he will have a lockout or something and crash, you will get a claim-request 3 days later:D:D hahaha

RE: Wren fadec issues?
 

Sandor, (DIGITECH)
you missing the point of these forums entirely.
We are all here to educate and learn about the hobby and peoples experiences with ALL types of equipment.
If we find there is a trend FOR or AGAINST a particular product then we ALL want to know.
Polls are a good way of ascertaining trends because it takes into account those people who don't want to leave a reply but wish to contribute because of their experiences.
No one here is out to 'bash' anything for no reason what so ever. Lets face it If there were no genuine problems, this thread would not exist. But the fact is there is a 'trend' and as intelligent people we try to analyse the problem with as much feedback as possible so we can make more 'educated' decisions about what the problems are.
I can understand why you have some emotional and/or proffessional attachment to this thread and it is great to see a manufacturer taking an interest in reading feedback about their product, but lets not get too defenceive here and lets start analysing the problem indeed if there is one with the ECU.

RE: Wren fadec issues?
 

My Gaspar ECU for my Simjet 700 turbine Has just gone faulty after 40 starts. There is no current going to the glow plug & the turbine has started to flame out at regular intervals.
It is out of warranty, so I guess i will have to fork out for a new one.