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walrus

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Posts posted by walrus

  1. Clan anyone help with the classification of aircraft for RAA purposes?

     

    LSA - built by manufacturer. - 600kg mtow.

     

    Amateur built? What is the difference between that and a kit built design that is capable of being an LSA? Then there is E-LSA....

     

    The kit has a choice of firewall forward engine and propeller options. Where do they fit?

     

    The technical manual is unclear where they fit.

  2. Foreign students are required to achieve a pass at ”Cambridge Level two English”. The training they buy to achieve this qualification is verging on fraudulent.

     

    Most eventually get it sort of OK if they persevere. I still remember “which one are you? Waggle your wings! ...from YMMB tower.

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  3. Kaz, I worked for a female sociopath and they are no less repellant than their male colleagues.

     

    Men and women have different personality traits and aggressive behaviours. Men physically fight and women scheme and lie.

     

    The result of #metoo and #believethewoman, etc. Is going to be very nasty for women; as follows:

     

    1. No male business executive is going to mentor any junior females.

     

    2. Male business executives will not take one on one business meetings with women.

     

    3. Male business executives will not socialize with workplace women.

     

    1,2 and 3 are already happening. The current climate is such that an unproven allegation against a man is enough to destroy a career in any public company.

     

    In private life, you are going to see the return of decorum and chaperones - for men in order to prevent allegations of misbehaviour that may be made ten or more years after the alleged party or event.

     

    The next thing you are going to see is the return of the class system in spades. Men will only associate with women of their own class - it’s safer for your reputation that way. This particularly relates to families who have money because they are vulnerable to the threats these days from gold diggers.

     

    On a personal note, I have one and a half young grand children who I will never associate with unless their parents are present. I will NEVER be alone or responsible for them. That is because if they turn out to be dysfunctional teenagers, I don’t want even the possibility of an allegation ever to be made against me......And it has happened to others already.

     

    ‘’This happens because there is already a social worker/ psychologist school that demonizes all men all the time and they are supported by their female colleagues in the judiciary and government. A simple meeting and a bit of coaching by a shrink and the next thing for a man is a visit from the police. The standard of proof required in making allegations is minute. Go read Clementine Ford...

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  4. Reference pages 4-5 and 4-6 of engine operators manual. If the aircraft in question ran out of voltage, then perhaps it was miswired. Some operators try to handle the logic of the system with key switch and relays. Rotax recommends mil spec toggle switches - seven of them (ECU A and B, pumps 1 and 2, start power, emergency power and start).

     

    Start power ties the two alternators and battery together and powers ECU and fuel pumps until alternators take over. You open that after start because then if the engine stops, the fuel pumps stop - which you definitely want to happen..

     

    Similarly emergency power connects ECU and pumps to battery. That should also be normally open, else you won’t know if the alternators fail, - until you run out of battery.

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  5. Great video! Well done Kyle! Dunno what happened to the electrical system. If it was an injected engine, The engine shouldn’t have been running on battery at all unless the emergency power switch is selected on - which is also your cue to head home PDQ.The falling battery voltage should also have given the game away. I’d like to know what failed beyond the comment on the video : “alternator and battery”. Reference? Pages 4-5 and 4-6 of engine operators manual.

  6. The Rotax 912 iS are electronically fuel injected. This means “no volts = no engine”. To guard against this there are two oil cooled alternators, one for the engine ECU an fuel pumps and one for the aircraft and battery charging.

     

    If alternator A fails, alternator B dumps the aircraft and battery and instantaneously takes over the engine load. If B then fails you will use emergency battery power to start and run but the draw is about 13 amps. You need to size the battery to give you 30 minutes+.

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  7. I hope the survivor makes a good recovery.

     

    Three points that might or might not be relevant:

     

    1. With a constant speed prop, the engine can often make rated rpm but produce little power. Manifold pressure won’t tell you. You have to check fuel flow to confirm you are making rated power. Flow would be about 23l/h at 5800 full power. Mere engine noise won’t tell you much. Furthermore, if the prop is installed and adjusted correctly, you should be able to take off on the full coarse pitch stop at the cost of overloading the engine.

     

    2. When the aircraft takes off it is flying relatively easily in ground effect until it reaches about 1.5 times wingspan. Climbing above that depends on power available and aircraft weight.

     

    3. I have a 912iS, not yet flying, it has lots of redundancy. About the only things, I think, that might go wrong absent complete mechanical collapse, are air and fuel flow. On my aircraft, shutting the fuel cutoff stops the engine in about two seconds. Rotax normally supplies two fuel pumps in one assembly. Provided both were on for takeoff there shouldn’t be a fuel problem unless there was a restriction like a clogged filter(gascolator and high pressure filter) or water somewhere. The pumps and ignition use generator A and if that fails there is instantaneous switch over to generator B so if the engine was turning the pumps were running.

     

    Assuming the Aircraft had an EFIS, you would expect voltage and fuel pressure warnings.

  8. Only listed businesses are required to close. Some like cafes can offer takeaway. Schools are optional in some states. I don’t think there is anything specific about flying schools. There is advice against non essential travel but no definition other than “common sense”. Doing a BFR involves “close contact” which is your only problem. However beauty salons, dentists, physio, chiropractors any other business not listed is allowed to operate.

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