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tafisama

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Everything posted by tafisama

  1. tafisama
    Great news for sure
  2. tafisama
    An Altimeter is the primary reference instrument for altitude.An EFB is not even a secondary instrument,it`s just for situational awareness.This pilot should have remembered that.He was reckless to reference to his EFB.
  3. tafisama
    You do not need to worry about adding any more ballast.Your weigher has done it all.I believe the Rotax engine with radiator weighs more than the Jabiru engine.That would have put your cog forward so to prevent that,thats why that ballast of 2.5kgs has been added.I have checked your cog with a pilot only with weight of 80kgs with no baggage and no fuel,it is 229.36mm which within both forward and aft limits.With 100l of avgas,pilot and no baggage ,it is 263.72 which is well within both forward and aft limits. There is nothing to correct unless you want to reduce weight of your ballast to move cog more forward.
  4. tafisama
    Interesting to find Airspace infringement and seperation being so high.We really need to be very cautious.Thanks,that is a useful Tool.
  5. tafisama
    Not sure what is going on with the Baroons.This is a fourth one if I am mistaken.https://www.9news.com.au/national/plane-emergency-landing-south-australia-aldinga-adelaide/f81b8582-d1a1-49ec-af94-7e4b5eafc653
  6. tafisama
    With regards to horizontal stabiliser,I had an aerobatic instructor show me the good design.The horizontal stabiliser needs to sit well above the wing level so that in a stall the turbulent airflow above wings does not inhibit rudder effectiveness as more smooth air is flowing to the rudder.The other design is the one pointed above where the rudder extends below the horizontal stabiliser,again letting smooth airflow past part of the rudder.These old instructors we have here are a valuable resource.Kev I will show you next time we meet at the club.
  7. tafisama
    Bill could you give Karl Faeth at ASC Gawler a call.He is our club's cfi.He will give the good tips.I did my Roko conversion with him and other instructors as well.Speed management is critical especially on shorter runways.
  8. tafisama
    So if it doesn't meet LSA standards,does it meet GA standards.What I have heard is LSA standards state or require an aircraft to come out of an incipient spin without much control input from pilot and enter into a spiral dive.A C152 is one such aircraft I know of though it's not an LSA.However some of the Bristels that have crushed were GA registered which means GA pilots are failing to recover.The Statwell incident I know of happened at very low height.I am not sure if they recover easily at height.I have flown a Roko which recovers at height but any unco ordination at stall,it drops a wing violently.I hope DJP will be able to share his views here.
  9. tafisama
    For the FK9 if you climb at stated climb speeds when the prop is configured to climb,you will have a much higher nose attitude.You will basically have no forward vision.All you see is blue.As a result you end up climbing at higher speeds when you lower your nose to have that forward vision.
  10. tafisama
    You made a typo which has changed the meaning.Anywhere you will realise what i meant when you fly a different type.Dont worry about it.
  11. tafisama
    I am signed off on that type.Jabiru 7252 has said it all.At Gawler we preferred not to use flaps for take off when the prop was adjusted for climb,however when they changed it to cruise we would use flaps but quickly retract them.The aircraft tends to have a steep nose in a climb.
  12. tafisama
    I will be doing Aerodynamics around April.
  13. tafisama
    I agree with the above comments,the safest way should be to have off and on only.However the feed lines should be fitted with non return valves so that no tank is fed in during banking.
  14. tafisama
    Interesting Paul,I have said the same thing to my colleagues.I fly the Liberty XL2 well because I have flown the Roko.The Libery though is much steadier and balanced on stalls.
  15. tafisama
    For sure it should be interesting read.My club owns the sister a Roko NG4 which is only flown by members with 50 plus command hours.There is a general feeling no one should be practicing stalls without an instructor.It has violent stall characteristic especially when it yaws just before the stall.Lovely to fly though and stalls below 38knts.
  16. tafisama
    You are very right,I made a big error but then my school seemed not to fully understand how to have Navigation added onto RPL.Casa could not add Navigation because I had no Instrument time.It is because of these endorsements that I found going for PPL would be wise as they are embedded in it.
  17. tafisama
    I did exactly what you are planning to do.Did my RPC with all endorsements at Gawler in the J170C and D.Moved to the J230C.Later because of wanting CTA and heavier machines ,went to Parafield in a C172.That was expensive.I already had RPL from CASA all I needed was a Flight Review.The C172 was very different to handle, and I spent a lot of hours trying to master it, at the same time doing Navigation.I finally passed my PPL tests BUT THAT WAS VERY EXPENSIVE.So the cost for RPC and endorsements was under $5 000 but for PPL alone it came to $20 000 because I would run out of money and spend over 8 weeks without flying and when I came back,it will be like starting afresh.Navigation was my biggest killer at times flights would be 3.2 hours @$360/hr plus landing fees. I dont regret though.
  18. tafisama
    Good result from quick thinking.
  19. tafisama
    Better to have more fuel, that extra 8liters will save a life
  20. tafisama
    Thank God,fellow aviators live to tell.Good job and well done.
  21. tafisama
    They should limit travel of the elevator to give some 5 degrees pitch up attitude so that the aircraft continues to climb to gain more height.As long as the elevator is still allowed to be trimmed full down,we will have another incident.How well we handle situations is dependent on a number of factors.
  22. tafisama
    They need to work on that aspect.It should not trim the elevator full down.I believe pitching down to 10° up limit would save souls.I am not sure what the normal climb attitude is for this jet.We will be hearing soon what they have actually done in the new software but if its still set to trim full down, they have not done anything meaningful.I am not sure why the engineers missed it earlier.When you pitch down to prevent a stall,you just ease the stick forward not push it all the way.The furthest it should travel is to neutral elevator position though I would prefer a 5° pitch up attitude so that the aircraft keeps climbing if it was already in a climb. Lol they might need to add an Elevator position sensor as well which will prevent the elevator to be trimmed full down.
  23. tafisama
    What I don't understand is why the mcas system trims the elevator full down.In stall recovery we normally relax back pressure and that's enough to break a stall.Boeing should limit the trim down by mcas to something like 10° up or just neutral and this should be programmed to happen some 20kts before the actual stall.
  24. tafisama
    oh,no RIP to the duo.Something must have gone very wrong here.
  25. tafisama
    The biggest question should be ,why did the aircraft fail to climb out.It never reached 2500 feet.Why were the engines not producing enough thrust/power.The MCAS comes in to pitch down in an impending stall.I believe there is more and hopefully Investigators will pick it.Did they have a stuck down trim tab that forced the elevator full up.Did the pilots program wrong weight into system.I believe the MCAS came into effect after the system detected a stall was imminent,so to me it was responding to a crisis just like a fuse will blow if high current passes through its rated capacity.We are mostly focusing on the result not exploring the causes.Why did the aircraft fail to climb out???
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