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Type: Posts; User: WrenTurbines

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    RE: Wren 54 Mk2 problem

    The JJ FADEC is an illicit copy of the Gaspar Espiell FADEC and because it's a poor copy, it doesn't work properly. Our advice is to a buy a genuine Espiell ECU for your engine, and then if you still...
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    RE: Kero start

    There is no problem with the FADEC ECUs and we are not suggesting that people change them. We have changed to the Projet for the 160 because there are more options like telemetry and kero start.
    ...
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    RE: WREN MW54 mk3 Spares wanted

    We still carry some spares for the Mk 3 and can guarantee that they are Wren parts. Be careful if buying privately, we've seen JetJoe parts advertised as Wren Mk 3 parts and it's very difficult to...
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    RE: early 44 gold flame out

    Chris,

    If the pump is OK we need to look at how your fuel system is plumbed - email me at Wren or phone us and talk to Roger.

    Sara Parish
    Wren Turbines
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    RE: JetJoe OWNERS thread

    I've got a Jetjoe - well. the remains of one - given to me after the customer had bought a Wren to replace it. This particular JJ had been given a Wren front and tailcone and passed off as a Wren in...
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    RE: JetJoe OWNERS thread

    The JJ1200 and 1400 are copies of the Wren MW54 Mk 2 and 3. The JJ1800 was a Simjet Sonic. The JJ Junior is the Martin Lambert Kolibri and I believe the JJ 3000 is a copy of the Merlin, meaning that...
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    RE: JetJoe OWNERS thread

    Yes, there have been a large number of 54s built by homebuilders - all using the MW54 PLAN for the engine designed by Mike Murphy and John Wight, copyright WREN TURBINES. The homebuild engines aren't...
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    RE: Welcome Wren Turbines USA

    The Mk 4 has a different rotor assembly (compressor, shaft and turbine wheel) from the Mk 3. This makes it easier to assemble in kit form. There is little difference once the engine is built, the...
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    RE: WREN54 MANUAL START HELP

    The reason your engine won't accelerate is because it's too hot. The ECU will not allow it to accelerate if it is approaching the maximum temperature.

    You need to find out why your engine is so...
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    RE: Kero start

    It won't be a couple of days, but we hope the timeframe is now in weeks rather than months.

    Sara Parish
    Wren Turbines
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    RE: **Wren Turbines USA Open house**

    OK, guys, only a couple of days to go. We have sent over a BIG box of goodies - only engine-type ones though, the cakes couldn't get past the sniffer dogs at the airport...

    Mike Murphy is on...
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    RE: Recommended Oil Types

    Ron's got it right - we are happy with any turbine oil, or Mobil DTE light, or if those are unobtainable you can use high-quality two-stroke motorbike oil.

    Whilst I'm on the subject, can I also...
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    RE: wren 44 blade failure

    Don't worry, most Wren engines don't have problems! This is only the second 44 we've ever seen with a blade broken and it is difficult to say exactly what the cause was - maybe something went through...
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    RE: Kero start

    Kero start will be external. The 160 and 120 will be the first engines to use it, and there will be an official announcement soon. We don't yet have a timeframe for the smaller engines to change to...
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    RE: Wren 120 kit?

    It's possible, but it's not likely to happen for a while.

    Sara Parish
    Wren Turbines
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    RE: Kero start

    We haven't been saying "soon" we've been saying "We've got it on the test engines, but we aren't 100% confident with it and it isn't ready yet". However, we can now say "It will be available soon"...
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    RE: Turbine Kits

    I think that might be rather a long way for a guy in Malta!

    We have several Wren turbine fliers in Malta, and I can put you in touch with one if you wish. Sales for Malta are usually done from...
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    RE: Did anyone see the Jet Cat P-20?

    Only one 'n' please, Mike, we're WREN!

    Some years ago John Wright, editor of RCJI, did some research on pipe design and found that a divergent pipe - where the diameter gets larger - actually...
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    RE: Buying a Kit Turbine & Balance

    It's rather better than "Good enough or fit for purpose".Wren engines all undergo the same balancing process, we do a very accurate balance on the shaft assembly - not only the wheel and compressor...
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    RE: **Wren Turbines USA Open house**

    Looks like you are going to have a great time! Mike Murphy is coming over from England to join in the fun and provide lots of help and information about turbines. I'm quite envious, I wish all the...
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    RE: Pipe Diameter for Wren SS??

    52mm diameter inside the bellmouth and 62mm at the outlet.

    Sara Parish
    Wren Turbines
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    RE: Pipe Diameter for Wren SS??

    Our jetpipes are 61mm diameter (inside the bellmouth) which then tapers to about 70mm. Gap between engine exhaust and bellmouth should be 30mm. We wouldn't recommend anything smaller.

    Sara...
  23. RE: What is more important for turbine cooling

    Try to keep the 30mm gap - having the engine too close to the pipe will give airflow problems that affect the engine. Air is sucked round the turbine and into the pipe, and if this can't happen...
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    RE: wren 44 blade failure

    We don't have a support forum because we like to talk to our customers personally. Support forums tend to be staffed by reps rather than the actual manufacturers, and looking through a support forum...
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    RE: wren 44 blade failure

    There are a number of things that can cause a wheel to lose a blade. Blade failure is fairly uncommon, because the wheels are subject to full aerospace inspection so we don't receive faulty castings...
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