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Roscoe

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Posts posted by Roscoe

    W&B and CoG Jabiru 170D/230D

    in Aircraft General Discussion

    Posted

    and as for your steep dive example, I would say the answer to that riddle you have provided it is about relative airflow. The relative airflow over the aircraft would be the same as in level horizontal flight, and the CoG conditions are based on some airflow benchmark (presumably cruise but I have little knowledge of the specifics of aircraft design) , . did I pass?

    Glen, with respect, I think you are going into this W&B thing far too deeply.

    When you start your flying read the POH for the Aircraft you are operating, and go through some loading scenarios with your Instructor.

    Dont overcomplicate with in depth mathematical formulas or you will find your Instructor might get fed up fairly quickly.

    By all means, read up to your hearts content, but i believe you are going way beyond whats necessary in understanding basic loading stuff.

    Just enjoy your flying!!

    • Like 2

    fuel gauge for Jabiru

    in Instruments, Radios and Electronics

    Posted

    Some of those fuel tanks that sit behind you made of semi transparent plastic of some kind are CALIBRATED in the most simple way. Have a bit in and run it dry so you still have the unusable fuel. Then add increments off 20 L or so measured carefully and mark each level with a dark line Go all the way to the top and write total fuel XY litres. THAT has got to be fool proof. Thin and long wing tanks are not so easy. but you know when they are FULL and when they are EMPTY. IF you add a measured amount to an empty tank you KNOW how much is in it . You can also drain a measured amount from a full tank. These are accepted ways to accurately determine what fuel is on board. Even the best engines in the world need fuel. or they stop. Dip sticks are OK if the plane's level and the stick is correct for your plane and you KNOW that it is. Absolutely full tanks can vent fuel parked on slopes or taxying fast on bends. Fuel can disappear from your plane overnight. Nev

    You cannot see the fuel level in the Wing tanks on my J170.

    Since I am the only Pilot, and am hangared, I always know my fuel state, but still have 3 ways of checking.

    Analogue float gauges at the Wing Roots

    Electrical sender gauges on the Panel in front of me

    and

    A JPI Fuel Scanner instrument which is very accurate within a couple of Litres at each refuelling.

    The first 2 items were standard equipment when the Aircraft was built at the Factory.

    The issues surrounding lithium batteries.

    in Engines and Props

    Posted

    I didn't know about point 4. Should I arrange for a heavy-duty resistor in the charging circuit on my Jabiru? By this I mean something like a high-wattage 2 ohm resistor between the voltage regulator and the battery. I thought the voltage regulator would protect the alternator.

    Hey Bruce, I am confused by all the technical talk going on in this thread.

    My Jabiru J170 has the standard Odyssey PC625 Battery and Jab factory Voltage Regulator.

    Any cause for concern?.....never had any issues!

    just joined

    in Just Landed - Welcome

    Posted

    Good grief! Have a look at the Conditions of Use required by Canberra Airport Pty Limited. You'd get a better deal from Satan for your soul. If you accept their conditions, you virtually have no Rights except to park an aircraft on the airport and use the taxiways and runways (but not bad at $2924.36 per annum ($8.00 per day) if you are a permanent).

     

    https://www.canberraairport.com.au/wp-content/uploads/2020/06/AVI-LRA-LCA-application-CA-conditions-of-use-June-2020_PROOF-02.pdf

    And dont forget the dreaded ASIC if you want to operate into a Security Controlled Airport like Canberra!

    just joined

    in Just Landed - Welcome

    Posted

    Alright . what comes first.

    Do I need RAA to participate / do the flying training, or is a typical method to run the flying training and then join RAA?

    Find instructor that fits me in a suitable location. I've had a bit of advice on this, either immersion and stay on site/in town, or something close to home that is a short drive ... What's the maximum number of days between steps ? I can do a full immersion but young family I really need to go home regularly for 'optional activities' as the wife sees it...

     

    glen

    If you start with RAA, I believe you have to join as a temporary member for a short period.

    Talk to an RAA School to confirm, or ring RAA.

    Your other queries i cant help with, thats your call.

    With GA , you will need an ARN number which you can do online,if you go the GA route to start.

    just joined

    in Just Landed - Welcome

    Posted

    Hi, My name is Glen, just joined. I live in Canberra these days.. I am 49 yo, a self employed electronics engineer with a youngish family..

     

    My plan is to get my RAAus, RPL+endorsements, buy a LSA etc. I'll join RAAus as soon as the go button is pushed.

     

    My industry background is high end micro and industrial electronics, radio, - aircraft avionics are a doddle ( for me) .

    I have a good working day to day background in things mechanical , structural, so doing the maintenance on my LSA will be an enjoyable and satisfying task. I like things that are detailed and serious.

     

    I've done a fair bit of right hand seated GA fixed flying for work and pleasure, and a fair bit of rotary time in G and C airspace.. Familiar with radio procedures . I know you don't want to p1ss-off the ATC op.

     

    A PPL (1500h)+VH registered owner I used to fly with alot has recently stopped flying, so time to do it myself.

    I think also I can provide some give-back to the organisation and associates in an aero club on my electronics caps from time to time..

     

    Have been reading and interpreting CAO 95.55.....

     

    As far as I can tell, I can, (but this is only my interpretation! I may be wrong) with a RAaus+RPL + specific endorsements, with a RAaus registered , factory built non modified (or having approved modifications) an LSA with radio and transponder, I can fly in and out of canberra YSCB. ... The thing is, I have never heard or seen a RAaus reg at the airport. Maybe needs to be VH, but according to my interpretations of 95.55, an RAaus factory built 23.xxxx or 24.xxx is OK.

    -glen

    Transponder Service

    in AUS/NZ General Discussion

    Posted

    Thanks for the replies. I think I have sourced support locally (Townsville). Microair aren’t an option any more it would seem. Phones are not answered and I’m told they have scaled down their avionics operations. Perhaps someone else might know more on this...

    Yes Microair no longer service their Avionics,

    • Informative 1

    Human Factors and Limitations Recommendations?

    in Student Pilot & Further Learning

    Posted

    Thanks for your response. I recently just did and passed by BAK exam and although some HF questions were included, i am have been told that i must do a separate HF test as well. I will look into that but do you have any recommendations for an RA-Aus Hf theory book or where I could get just the human performance and limitations section from Dyson Hollland?

    I have the book you are after, you can have it!

    Just pm me and we can organise

     

    Thanks

    So do you know the answer - 50 tons of Canaries

    in AUS/NZ General Discussion

    Posted

    Any commercial pilot please do not answer this if you know the answer and give it away this is for the guys to exercise their brains in RAA or PPL pilots.

     

    This question we got thrown as a hypothetical in one of senior commercial theory licence questions in class it was not in an actual exam – but a bit of fun by the instructor.

     

    Accept the premise AND all assumptions.

     

    So we have 50 tons of Canaries (yes little yellow birds) sitting in all the seats of a 747. No seats belts.

     

    The 747 is flying at 35,000 feet straight and level.

     

    Then all 50 tons of Canaries become airborne inside the 747 flying around.

     

    The Question

     

    • What happens to the 747 In other words is it 50 tons lighter Or is it the same weight at that point in time.
    • If it is 50 tons lighter does THE 747 climb
    • If the 747 maintains it's flight level without climbing WHY?

     

     

    Please explain your logic and process of YOUR answer.

     

    No droll smart **** answers I've heard them all before .

    The weight doesnt change because the air under their wings is deflected downwards to the floor so overall weight unchanged

    LightSpeed Zulu 2 Phone Call Issue

    in AUS/NZ General Discussion

    Posted

    I had failed to lodge my latest flight plan so I had to ring her to rectify.

    You can always turn the bluetooth off so you wont be disturbed, and turn it back on if you have to make a call.

    There have been situations in Controlled Airspace where Comm failures have occurred and its handy to have the Tower number stored.

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