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Thruster88

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Posts posted by Thruster88

    Cheap endoscope

    in Aircraft General Discussion

    Posted

    Did you find anything? What have you heard? Mine looks sound from the outside. Saw this point fracture on a Gemini at Holbrook 25 yrs ago. Not fatal but still not good.  Rgds Don

    Did not see any faults and have not heard of anything but if it was to crack it would happen inside the stainless brackets and not be visable from the outside. Mine has about 1300tt nearly all by me and no training.

     

     

    Airstrip approved

    in AUS/NZ General Discussion

    Posted

    Real engine ??? - My Rotax 912 ULS gets me off the ground/grass (slight up hill gradient) with full fuel in sub 100 m -  climb out @1500 +  ft/min 60-70 knots & I can cruise at 50 - 120 knots on  8 - 18 LPH unleaded. On top of all that its so quiet my neighbours mowers make more noise.  You what you can do with Uncle Sams LyCon's ......!

    The Rotax 912 is absolutely a real engine, I would rate it equally for reliability with a lycoming. I think you will find the brake specific fuel consumption is very similar as well, my 160 hp  burns 33lph. Props make the noise. 

     

     

    Accident and defect

    in Governing Bodies

    Posted

    The reporting goes on, but no details and once again I think they have reported the same incident with 2 different planes.

    I really cannot see how we can be having all these incidents, because according to the RAAus site we have flown a total of 2519.1 hours and that is 0.26 hours per pilot in a year. Their numbers, not mine.

     

    As we have 3365 aircraft according to them, that equates to 0.75 hours per plane. We also have 9668 pilots flying those 2519.1 hours, which means 3.83 hours per pilot.

     

    If RAAus cannot put in the correct figures, or even see that they are obviously incorrect, plus they cannot bring the incident reports into any semblance of sense, how can they be contributing to safe flying.

     

    I know I should talk to them about this, but it is a complete waste of time.

     

    2519.1 hours flown for the first 17? Days of 2019 is only going to be 54,086 hours for the full year, so get out and start flying you slackers

     

     

    Lion Air Accident - Emergency AD for B737 max-8

    in Aircraft Incidents and Accidents

    Posted

     They run a "differences" course but don't tell you about the differences. They are now altering the "software". Bit late for 189 people and the Companies reputation. There used to be a saying... "If it's not Boeing I'm not going" All the systems are made by the same manufacturer (Honeywell) but the system LOGIC varied. There was usually less "Mystery" with The LAZY "B". "What's the bloody thing doing now?" stuff. It's a trend to leave the Pilot out of the loop as not being important.. Airbus started the "pilot safe" aeroplane myth.  Nev

    The pilots were facing a runaway trim, why it was happening does not matter.

     

    As you would know facthunter all ?  737's have 2 large trim wheels tha rotate whenever trim is happening and 2 switches to stop electric trim, one stops autopilot trim and the other stop ALL electric trim even the MCAS ?.

     

    I am only a PPL and have only looked at a 737 POH for five minutes but i have always been aware of runaway electric trim as any pilot should be. It's  a shame the CVR can't  be found.

     

     

    Cowl Air Temperatures

    in Engines and Props

    Posted

    Thruster - The cold air intake on cars today is more usually an aftermarket addition, as most car manufacturers today have no controls on air intake temperatures.

    I mean the factory setups drawing from the inner guard  area compared to the HQ Holden etc sucking out of the engine bay.

     

     

    Cowl Air Temperatures

    in Engines and Props

    Posted

    To do the test well you need to somehow have the same output power from the engine under the two conditions. The hotter test will need the throttle to be slightly more open to produce the same power.

    The prop will require less power on a hot day for a fixed rpm. This why there is only one static rpm in the POH and no allowance for altitude or density altitude. Orange NSW on a 35 C day, DA 6000' would still give me 2450rpm but the power is way down compared to sea level.

     

    Any efficiency tests would have to be done on a good dyno to measure the power produced.

     

     

    • Like 1

    Cowl Air Temperatures

    in Engines and Props

    Posted

      Some of the very long distance flight done in the long Eze's were done with a little bit of carb heat applied in the cruise, not to ward of icing but to improve efficiency.

    I wonder why none of the car manufacturers are adopting this, they all seem to have cold air intakes on EFI engines. Maybe their engineers are not very smart.

     

     

    Cowl Air Temperatures

    in Engines and Props

    Posted

    My main interest however is any real world/significant benefits that I may expect from reducing the engine compartment in flight temperatures or at least delivering cool air to the carbi's  - what think you ??

    Engines lose about 3% power for each 1000' alt increase. From our BAK  I we know that  1 degrees C is 120' of density altitude, so your +10-20 C inlet temp would result in a 3-7 HP  loss.   

     

     

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