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  1. #1
    David Gladwin's Avatar
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    Wren turbines.

    Just heard that Wren engines will soon be available with kero start and Projet ECUs. Due Feb I believe so not long now !

    Regards, David Gladwin.

  2. #2

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    RE: Wren turbines.




    Sounds good
    Keep em running safe

  3. #3
    jason's Avatar
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    RE: Wren turbines.

    I still can't see a single reason to buy a kero start engine over a gas start one, but I can see many reasons to buy a gas start engine over a kero start one. I like my Β£4.00 glow plug that lasts years and a engine that starts perfectly every time without fail and also doesn't need to be connected to the national electricity grid to do so.

    Saying that, theres always the customers who will want this new feature and I'm sure it will help sell even more Wrens for them which is after all the only reason they have done it.

    Jason

  4. #4
    josecilurzo's Avatar
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    RE: Wren turbines.

    I AGREE!!!! GAS START IS EASY TO START, MAINTENANCE, AND LOW COST ( GLOW PLUG, MANIFOLD and FESTO ).

    I PREFER GAS STARTING.

    JOSE

  5. #5
    Eddie P's Avatar
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    RE: Wren turbines.

    I can see for "plug and play" reasons. It's fewer lines, festos, tanks, required supplies, what have you. If I was starting out in turbine, I'd go with Kero start all the way, no question about it. Since I already have all the hardware and a few extra bottles of Powermax sitting in the garage there is no reason for me to do it. I've modified my systems to removable gas tanks to lighten up the airframe by a few ounces but more importantly to remove any possibility of a gas ignited fire in a crash. Yes I know there is some debate on that issue and work arounds but I went ahead and made the change in a small way.
    Eddie P - NOT sponsored - I pay the bills of hobby manufacturers with my purchases - Free to evaluate products honestly

  6. #6
    Couch Potato's Avatar
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    RE: Wren turbines.

    Which Wren turbines will have the kero start option ?

    All of them or just the big ones W-120 & W-160 ?

    Ta very much.

  7. #7
    JohnMac's Avatar
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    RE: Wren turbines.

    Well the use of on board gas is optional. It seemed like a good idea when it first came out but it is simply not necessary. Either way gas start has always worked fine for me.
    I think that Kero start is a perfect solution to a problem that does not exist. Perfect for those that must have the latest and "best" gadget.

  8. #8

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    RE: Wren turbines.

    Where is the info on the ECU's, I take it parameters will be programmable?
    Son of a.............................that\'ll leave a mark.
    CF

  9. #9

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    RE: Wren turbines.

    What's a "GAS START TURBINE"?
    Steve G

  10. #10
    Eddie P's Avatar
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    RE: Wren turbines.


    ORIGINAL: tothemax

    What's a ''GAS START TURBINE''?
    Too many posts and then a whine!
    Eddie P - NOT sponsored - I pay the bills of hobby manufacturers with my purchases - Free to evaluate products honestly

  11. #11
    David Gladwin's Avatar
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    RE: Wren turbines.

    My understanding is that initially, at least, only the 120 and 160s will be kero start.

    I am not advocating kero start only passing information on. Two of my engines, JC P70 and 160 SX are kero start the rest are all propane. What I do like about propane is the very obvious start indication when the propane lights, the kero starts are just too quiet in even a slightly noisy environment.

    I understand that the latest JC plugs are giving superb service life.

    Regards, David Gladwin.

  12. #12
    Geoff White's Avatar
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    RE: Wren turbines.

    Hey Jason,

    I said the same thing to John Wright once, he replied that the thermal shock on the turbine when starting via Kero is far less so is gentler on the turbine as a whole.

    Geoff.

  13. #13
    jason's Avatar
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    RE: Wren turbines.

    ORIGINAL: Geoff White

    Hey Jason,

    I said the same thing to John Wright once, he replied that the thermal shock on the turbine when starting via Kero is far less so is gentler on the turbine as a whole.

    Geoff.
    Good Morning Geoffrey

    You will be the one in thermal shock when the internal burner goes on your 160 SX at the start of a meet[X(] I'll stick to my gas and glow plugs until kero start problems either do not exist or car be sorted on the field. Anyway, I have 42 Rossi R8 plugs in stock to wear out first

    Jason

  14. #14
    Jim Cattanach's Avatar
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    RE: Wren turbines.

    The Projet ECU's have been out on the Wren 160 for a few weeks now. I have two 160's with this ECU.
    JET FLYING:- Resistance is futile. You will be assimilated.

  15. #15
    Geoff White's Avatar
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    RE: Wren turbines.

    Jason,

    I can assure you if the burner goes US on my 160SX at an inconvenient moment, Wilshere will have a thermal shock when I have finished with him

    Geoff.

  16. #16
    madmodelman's Avatar
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    RE: Wren turbines.


    "Anyway, I have 42 Rossi R8 plugs in stock to wear out first"


    Now we know why you're anti kero!
    Stuka, P51, Super Chipmunk, Super Stearman R170, BE2e, Javelin, F16, L39, F86, Viperjet and at long last an F4!!

  17. #17
    smitty1001's Avatar
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    RE: Wren turbines.

    Anyone know why Wren bailed on the Gaspar ECUif that is indeed the case?

  18. #18

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    RE: Wren turbines.


    ORIGINAL: jason

    I still can't see a single reason to buy a kero start engine over a gas start one, but I can see many reasons to buy a gas start engine over a kero start one. I like my £4.00 glow plug that lasts years and a engine that starts perfectly every time without fail and also doesn't need to be connected to the national electricity grid to do so.

    Saying that, theres always the customers who will want this new feature and I'm sure it will help sell even more Wrens for them which is after all the only reason they have done it.

    Jason
    Rossi #8 s last about 2 - 3 years in my kerostart engine, will work on any old 4 cell nicad, does not need any service and 100's have done so for 9 years now.
    It is also cheaper to manufactue than a "keroplug".
    The industry is just so far behind.
    Andre Baird


  19. #19
    Jim Cattanach's Avatar
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    RE: Wren turbines.


    ORIGINAL: smitty1001

    Anyone know why Wren bailed on the Gaspar ECUΒ*if that is indeed the case?
    When I bought my 160's, Sara at Wren said they changed to the Projet ECU as it works better on that turbine. I believe it automatically sets & adjusts many of the parameters to suit conditions.
    JET FLYING:- Resistance is futile. You will be assimilated.

  20. #20
    Couch Potato's Avatar
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    RE: Wren turbines.


    ORIGINAL: Jascat100


    ORIGINAL: smitty1001

    Anyone know why Wren bailed on the Gaspar ECUΒ*if that is indeed the case?
    When I bought my 160's, Sara at Wren said they changed to the Projet ECU as it works better on that turbine. I believe it automatically sets & adjusts many of the parameters to suit conditions.
    Did you get the "old" simple ECU ? If so, how does your W-160 run, less than "better" ?

  21. #21
    jason's Avatar
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    RE: Wren turbines.

    ORIGINAL: Turbotronic


    ORIGINAL: jason

    I still can't see a single reason to buy a kero start engine over a gas start one, but I can see many reasons to buy a gas start engine over a kero start one. I like my Β£4.00 glow plug that lasts years and a engine that starts perfectly every time without fail and also doesn't need to be connected to the national electricity grid to do so.

    Saying that, theres always the customers who will want this new feature and I'm sure it will help sell even more Wrens for them which is after all the only reason they have done it.

    Jason
    Rossi #8 s last about 2 - 3 years in my kerostart engine, will work on any old 4 cell nicad, does not need any service and 100's have done so for 9 years now.
    It is also cheaper to manufactue than a ''keroplug''.
    The industry is just so far behind.
    Andre Baird


    Andre

    so why don't turbine manufacturers use your system? Did you put a patent on it so they can't without paying or is it difficult or expensive to make?

    Jason

  22. #22
    GrayUK's Avatar
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    RE: Wren turbines.

    Gas for me, simple and works....like someone i know
    no one told you when to run...

  23. #23

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    RE: Wren turbines.

    Jason,
    The fuel injector/atomiser is difficult to make in the sense you need precision equipment and really small tools but otherwise its really simple. The most expensive part is the 3mm Festo. My system requires no mods to the engine design as such but a few alterations are obviously required to fit. The most surprising thing, even to myself is just how reliable it turned out to be. The really clever bits are in the software. I dont believe in patents really. I have offered this system for sale but with no response. Engine manufacturers lacking electronics knowledge probably has a hard time believing such a system can work.
    The picture is of the bussiness end of the device. The OD is 6mm, the flat surface 4mm and the orrifice 0.12mm. We have made them down to 0.08 mm but the flow was too low.

    Andre
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  24. #24
    Jim Cattanach's Avatar
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    RE: Wren turbines.

    ORIGINAL: Couch Potato


    ORIGINAL: Jascat100


    ORIGINAL: smitty1001

    Anyone know why Wren bailed on the Gaspar ECUΒ*if that is indeed the case?
    When I bought my 160's, Sara at Wren said they changed to the Projet ECU as it works better on that turbine. I believe it automatically sets & adjusts many of the parameters to suit conditions.
    Did you get the ''old'' simple ECU ? If so, how does your W-160 run, less than ''better'' ?

    The Projet ECU supplied is the latest Hornet 3. The turbine runs perfectly on it. My two ECU's are back at Wren to have newer software loaded. I have a friend who has the Wren 160 using the Gaspar ECU. It seems to run perfectly as well. Maybe Wren got a better deal from Projet.
    JET FLYING:- Resistance is futile. You will be assimilated.

  25. #25
    jason's Avatar
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    RE: Wren turbines.


    ORIGINAL: Turbotronic

    Jason,
    The fuel injector/atomiser is difficult to make in the sense you need precision equipment and really small tools but otherwise its really simple. The most expensive part is the 3mm Festo. My system requires no mods to the engine design as such but a few alterations are obviously required to fit. The most surprising thing, even to myself is just how reliable it turned out to be. The really clever bits are in the software. I dont believe in patents really. I have offered this system for sale but with no response. Engine manufacturers lacking electronics knowledge probably has a hard time believing such a system can work.
    The picture is of the bussiness end of the device. The OD is 6mm, the flat surface 4mm and the orrificeΒ* 0.12mm. We have made them down to 0.08 mm but the flow was too low.

    Andre

    Andre

    thats very intresting, thanks.

    Gaspars first kero start Merlin 160 used atomisers when I saw it Majorca jets about 5 years ago. Not sure why he went away from it though.

    Jason


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