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jetjr

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jetjr last won the day on October 16 2018

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About jetjr

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    Well-known member

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  • Aircraft
    J200
  • Location
    NSW
  • Country
    Australia

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  1. Very sad, Some reports of structural failures in C 130 in USA in similar applications - ABC https://www.abc.net.au/news/2020-01-23/large-air-tanker-c-130-water-bomber-crash-cooma/11894892
  2. Inspection and measurement of catch oil is a key thing to monitor on Jabiru I think. Subtract volume in can at service to what was added and you get real oil burn That's whats going past rings etc Colour of and water in there important too.
  3. Reckon they are 1/2 ali tube ,bent into a right angle (slow radius) Come out the back of the duct and end sits just above coils and pump, just flocked in.
  4. Yes, CAE recommended blast tubes to coils and fuel pump I recall they had problems getting fuel pressure correct to limits and once springs correct there was some incidents of pump plunger binding - probably linked to heat Efforts spent on ensuring max gravity flow , see 60lpm ?? required without any pumps (std Jabiru gets around 30lpm) and they had special jigs to realign fuel pump on assembly. The extra blast tube does make getting duct on and off tricky
  5. there were problems with cylinder cracking Well supported and all replaced - THIS is a big improvement Not yet convinced they are that much better than older solid lifter versions
  6. Any report is better than none, even a rough assessment of what make and model and was it mechanical/pilot /other causes does help They shouldn't alter whats submitted. Previously there was near nothing being submitted and some looong assumptions being drawn on reliability and CASA acted on it. This had massive cost to RAA aircraft owners and had a part in manufacturers closing Not perfect for sure but better People may be prone to providing unclear detail when insurance will end up being involved
  7. Engine - which one/version , full history, 2011 puts it at a sensitive age with Jabiru engines not being at their best BUT flight schools have good arrangements to exchange engines regularly at good rates I believe. Plenty would look to having some top end work at 500hrs - don't see this too much as bad thing, pretty cheap comparably.
  8. No, increased weight wont apply to Jabirus due to stall speed remaining unchanged
  9. Theres should be some Jabiru 2xx around, handles weight fine as AC flys in other catagories up to 760kg Some older 19 reg are limited to 544 but some are 600kg Can get a good one for $60 Id say, I know of one which might be for sale
  10. https://www.oasisscientific.com/vividia-va-400-rigid-usb-articulating-borescope-videoscope-inspection-camera.html Sometimes are on ebay too, made by Vividia, used to be much cheaper without case and accessories Those scratches seem like honing marks to me
  11. I bought a fairy expensive Deca for quad and was dead after just a few starts, pulled down to 9 v on start. - returned for a credit happily supplied by reseller Also had some warranties on optima, seems every brand can have problems.
  12. "the PC 680,which is OK for Rotax or Jabiru. They do not like trickle charging" Interested in more on this, I had a ~ 5 year old PC680 fail after I started regularly leaving on Ctek charger - supposed to be Ok for maintenance on AGM
  13. Yes, not that one, theres one regarding rear exit of cowl. they have system for estimating how bad overheating is and then 2 or three different cowel exit mouldings https://jabiru.net.au/wp-content/uploads/2018/05/Engine-Cooling-JSB016-1.pdf Theres a similar one for J230 that discussed Gull wing baffles removal and theres pics of std ram ducts going deep into cylinders like pictured before The plates joining heads on the outside - preventing air leaks, were also tried by CAE and crack after a short time. Cylinders must move independently it seems
  14. Jabiru sell lower cowl pieces to modify cowl theres an old sb about it
  15. The term "dark art" comes to mind. Sure is, and in terms of air flow through cowl, (and fuel flow from inlet) it seems no to Jabs are the same The big difference is made by sucking more air out - lower cowl lips, then controlling the path that air takes - duct deflectors I think sealing gaps etc is essentially playing around the edges. There is a point where lower lip modifications can result in less flow and can cause exhaust to enter cockpit When modifying older Jabiru heads, be careful as you cant easily get them anymore unless something has changed
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