wren supersport
06-29-2010, 08:55 AM
#76
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RE: wren supersport
John, I have been part of this puzzle. Paul and Jim are clubmates. Last Saturday when the evobooster was running without the hatch there was a fly happily walking around the sheeting immediately below the turbine intake until we poked at it and it flew away directly passed the turbine. Ron.
06-29-2010, 10:36 AM
#77
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RE: wren supersport
ORIGINAL: Gaspar
Here our experience is just the inverse, we had to recommend to some owners of Intro to cut hatches to ease the suction on the engine, to avoid the engine sucking his own exhaust, but in Sprints we never had any issue. One of our local pilots have logged over 200 flights on his Sprint/M90 combo without any problem. And the M90 uses more air than a SS/G90. As I commented before, we had experienced issues with fuel, sometimes the deodorized kero is something but kero.
Gaspar
Here our experience is just the inverse, we had to recommend to some owners of Intro to cut hatches to ease the suction on the engine, to avoid the engine sucking his own exhaust, but in Sprints we never had any issue. One of our local pilots have logged over 200 flights on his Sprint/M90 combo without any problem. And the M90 uses more air than a SS/G90. As I commented before, we had experienced issues with fuel, sometimes the deodorized kero is something but kero.
Gaspar
Would the transverse ribs on the underside of the hatch be pushing down and closing off any of the vent/fuel lines that might run on the top of the tank?
06-29-2010, 10:42 AM
#78
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RE: wren supersport
Ron
Lucky fly!
It would help to see a photo of the installation. Usually there is something apparently insignificant that causes the problem.
John
Lucky fly!
It would help to see a photo of the installation. Usually there is something apparently insignificant that causes the problem.
John
06-29-2010, 11:36 AM
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RE: wren supersport
As i have said i have the photos, just cannot post them. If someone can do that i will send them the photos by email. My address is
[email protected]
[email protected]
06-29-2010, 12:51 PM
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RE: wren supersport
Ok, just got off the phone to Jim, the baffles if anything made the problem worse. He moved the turbine that far back it stuck out of the airframe just to try.
I hate to say it, but he is about to give up. He is worried that after so many flame outs and failed runs that he will damage both turbines. Unless we get something positve then i am a fraid this has got us beat.
If nothing comes to light by tomorrow night, i have offered Jim the use of my p70, that said Jim does have a p80 in an Elan that he may try, but he does not want to put anymore stress on his booster.
Regards
Paul
P.S.
As we know this is no longer a Wren problem, and the super sport is indeed a victim of this airframe, or instalation maybe the mods could move it to the Sprint thread???
We must stress Both the Wren and the booster have work without hick up in other airframes, so we dont belive that the blame can be pind on either turbines. Both Turbines are very good and both companys have help in everyway possible to help resolve this problem. I now fear that an answer may never be found.
Regards
Paul
I hate to say it, but he is about to give up. He is worried that after so many flame outs and failed runs that he will damage both turbines. Unless we get something positve then i am a fraid this has got us beat.
If nothing comes to light by tomorrow night, i have offered Jim the use of my p70, that said Jim does have a p80 in an Elan that he may try, but he does not want to put anymore stress on his booster.
Regards
Paul
P.S.
As we know this is no longer a Wren problem, and the super sport is indeed a victim of this airframe, or instalation maybe the mods could move it to the Sprint thread???
We must stress Both the Wren and the booster have work without hick up in other airframes, so we dont belive that the blame can be pind on either turbines. Both Turbines are very good and both companys have help in everyway possible to help resolve this problem. I now fear that an answer may never be found.
Regards
Paul
06-29-2010, 01:02 PM
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RE: wren supersport
Oh yes it will !!!! If I have to put my own Wren ss into the airframe. By the way my SS has now accumulated 43 hours of trouble free running. never a snap, crackle, or pop. Ron.
06-29-2010, 01:08 PM
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RE: wren supersport
I received the photos from paulflys4fun to post for him, and although I have posted numerous photos in the past on RCU, this time it won't let me telling , missing field..
I have tried 5 times so far, rebooted my computer and no cigars. sorry...
Roger
I have tried 5 times so far, rebooted my computer and no cigars. sorry...
Roger
06-30-2010, 03:14 PM
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RE: wren supersport
Hello 'new to jets'..............I wish I could get away from these pseudonyms, but what the hell !!
I appreciate that you started this thread and have been partially by-passed in the momentum that has developed in the discusions so I re-read the entire thread to see if the focus of the topic had passed you by. Have you found a solution and if so can you publish please?
In summary there have been 3 diverse elements that have evolved from the discussions. Firstlly your problems with your Wren SS. This prompted myself and others to support your claims relating to throttling difficulties. I then unwittingly contributed to the change of direction with the difficulties experienced by my pal with his own Wren SS. and recently we have monopolised the thread with our own frustrations with the tubine installations in the Boomerang Sprint with two different turbines. This has perhaps, overshadowed your original cry for help but I believe that maybe all the symptoms may have a commom cause and no I am not a turbine expert despite a RAF apprenticeship in airframe and engine fitting in the late fifties, -T11s Dave Gladwin ? I'm your man!!. - I digress.!!
Those with commercial interests will adopt a defensive posture with these discussions and that is acceptable providing they keep an open mind and I am sure at the end of the day solutions will be found. I will leave publishing of our trials from today in the hands of my freinds who videod our latest experiments. Our fickle nature will unfortunately allow readers of this thread to draw their own pre-emptive conclusions but I think the solution(s) are not too far away. Ron Sweeney.
I appreciate that you started this thread and have been partially by-passed in the momentum that has developed in the discusions so I re-read the entire thread to see if the focus of the topic had passed you by. Have you found a solution and if so can you publish please?
In summary there have been 3 diverse elements that have evolved from the discussions. Firstlly your problems with your Wren SS. This prompted myself and others to support your claims relating to throttling difficulties. I then unwittingly contributed to the change of direction with the difficulties experienced by my pal with his own Wren SS. and recently we have monopolised the thread with our own frustrations with the tubine installations in the Boomerang Sprint with two different turbines. This has perhaps, overshadowed your original cry for help but I believe that maybe all the symptoms may have a commom cause and no I am not a turbine expert despite a RAF apprenticeship in airframe and engine fitting in the late fifties, -T11s Dave Gladwin ? I'm your man!!. - I digress.!!
Those with commercial interests will adopt a defensive posture with these discussions and that is acceptable providing they keep an open mind and I am sure at the end of the day solutions will be found. I will leave publishing of our trials from today in the hands of my freinds who videod our latest experiments. Our fickle nature will unfortunately allow readers of this thread to draw their own pre-emptive conclusions but I think the solution(s) are not too far away. Ron Sweeney.
06-30-2010, 03:28 PM
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RE: wren supersport
Hi paul
I put the stabulity delay up to 100 and this seem to make the engine run much better it didn`t flame out untill i brought the acceleration delay down to 20 but put it back up to 27 now and the engine stays running but roar`s and blue flame about 4" long out the back untill it picks up speed
what does this tell me?
fuel is jet A1
I put the stabulity delay up to 100 and this seem to make the engine run much better it didn`t flame out untill i brought the acceleration delay down to 20 but put it back up to 27 now and the engine stays running but roar`s and blue flame about 4" long out the back untill it picks up speed
what does this tell me?
fuel is jet A1
06-30-2010, 03:49 PM
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RE: wren supersport
As Ron has said futher trail where done today and videoed, and if i every get a clever pill i will post them. We are getting there, but we are still only getting the turbine to spool up slowly, but running it is.
Wren have bent over backwards to help Jim, and we are looking to reinstall the SS and contiue testing. I promise we will keep you informed.
New2jets
I am glad the info i provided was of at least some use. Please contact Wren again and let them know what it is doing. I honestly belive your problem is fixable and Wren will fully support you.
If you still have no look, Jim, Ron and i will contuine to work on our problem, which i am sure will inturn help you.
Regards
Paul
Wren have bent over backwards to help Jim, and we are looking to reinstall the SS and contiue testing. I promise we will keep you informed.
New2jets
I am glad the info i provided was of at least some use. Please contact Wren again and let them know what it is doing. I honestly belive your problem is fixable and Wren will fully support you.
If you still have no look, Jim, Ron and i will contuine to work on our problem, which i am sure will inturn help you.
Regards
Paul
06-30-2010, 04:49 PM
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RE: wren supersport
ORIGINAL: jason
Can we have a photo of the instalation and the under side of the canopy please?
Jason
Can we have a photo of the instalation and the under side of the canopy please?
Jason
06-30-2010, 04:52 PM
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RE: wren supersport
ORIGINAL: paulflys4fun
As Ron has said futher trail where done today and videoed, and if i every get a clever pill i will post them. We are getting there, but we are still only getting the turbine to spool up slowly, but running it is.
Wren have bent over backwards to help Jim, and we are looking to reinstall the SS and contiue testing. I promise we will keep you informed.
New2jets
I am glad the info i provided was of at least some use. Please contact Wren again and let them know what it is doing. I honestly belive your problem is fixable and Wren will fully support you.
If you still have no look, Jim, Ron and i will contuine to work on our problem, which i am sure will inturn help you.
Regards
Paul
As Ron has said futher trail where done today and videoed, and if i every get a clever pill i will post them. We are getting there, but we are still only getting the turbine to spool up slowly, but running it is.
Wren have bent over backwards to help Jim, and we are looking to reinstall the SS and contiue testing. I promise we will keep you informed.
New2jets
I am glad the info i provided was of at least some use. Please contact Wren again and let them know what it is doing. I honestly belive your problem is fixable and Wren will fully support you.
If you still have no look, Jim, Ron and i will contuine to work on our problem, which i am sure will inturn help you.
Regards
Paul
Paul,
I apologize for not being able to upload the photos you sent me, I have no idea what is holding this back as I have posted numerous photos in the past , and have done exactly the as before, but for some reason, it won't let me telling me "missing required field". If anyone know what is missing , please do tell...
Roger
07-01-2010, 12:37 AM
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RE: wren supersport
Have sent my ECU and pump back to Wren as requested. Hopefully we will be able to resolve the problem.
Unfortunately they were at the Paris show, so no action as yet. Will give them a ring today.
Shame but have missed 3 glorious weekends so far.
Unfortunately they were at the Paris show, so no action as yet. Will give them a ring today.
Shame but have missed 3 glorious weekends so far.
07-01-2010, 03:16 PM
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RE: wren supersport
Paris show may-be but its not good practice in this day and age to shut up shop and everyone go, well thats my thoughts anyway, awaiting the flak 
lozza
lozza
07-02-2010, 03:04 AM
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RE: wren supersport
ORIGINAL: lozza1965
not good practice in this day and age to shut up shop and everyone go,
not good practice in this day and age to shut up shop and everyone go,
H
07-02-2010, 07:51 AM
#99
RE: wren supersport
ORIGINAL: lozza1965
Paris show may-be but its not good practice in this day and age to shut up shop and everyone go, well thats my thoughts anyway, awaiting the flak
lozza
Paris show may-be but its not good practice in this day and age to shut up shop and everyone go, well thats my thoughts anyway, awaiting the flak
lozza
Mike
07-02-2010, 08:14 AM
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RE: wren supersport
ORIGINAL: BaldEagel
Agreed, I'll take some of that flak as well if it comes.
Mike
ORIGINAL: lozza1965
Paris show may-be but its not good practice in this day and age to shut up shop and everyone go, well thats my thoughts anyway, awaiting the flak
lozza
Paris show may-be but its not good practice in this day and age to shut up shop and everyone go, well thats my thoughts anyway, awaiting the flak
lozza
Mike
They didn't. I spoke to one of their engineers at the factory during the time in question, it was simply that some of them had gone to the show at Paris