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facthunter last won the day on October 21

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About facthunter

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  • Birthday 04/01/1940

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    non pilot
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    New Gisborne
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  1. Yes, it's all there.. I wouldn't have considered the down slope that excessive. It stopped quite rapidly, eventually, and the resultant forces do the damage. The first bounce is the (latest) time to take action unless you have lots of room . Nev
  2. Sorry to persist, but a warning with the light coming ON is not a reliable indicator. unless it's duplicated . On the thinking it would be unlikely that two indicating systems would fail at the one time.. A light showing all is OK (functioning) gives a continuous assurance. ALL things have to be right for it to be on, and I gave an an example. Landing gear where the indicators shown a position Ie DOWN and LOCKED for each leg and in addition is an agreement light as the selector lever position is part of the equation.' Anyhow it's a question of which "LOGIC" appeals to you at the end of the day If you rely on an array of red warning lights you usually have a press to test switch that brings them all on.. An oil pressure gauge, once you get used to how it reacts to hot days, power changes and low levels of oil, can be more informative than any warning light. IF indicator systems are not reliable they are an extra hazard . Nev
  3. At high rpm they develop a chatter (wavy wear of the casing) where the seals have intermittent contact. Despite all this I do believe for special use they may be a good answer. Nev Nev
  4. Every now and again put the battery on an appropriate charger and see if it gets hot. A new and good battery doesn't get very hot. Fast charging is not recommended at all as gas bubbles in a paste matrix don't fix them selves I love AGM batteries. They don't leak acid. Nev t heal up
  5. The AGM or paste battery is definitely most satisfactory for the heavy start cycles. Monitor the heat . IF it starts to get hot when charging, the plates get airspaces between them and it's over for that battery. The jabiru start set up (flywheel) doesn't like a jumper lead approach much and a "too good" battery but that's just something to watch. You are going to get a better cranking effort on a cold morning, which is what you often need most. Nev
  6. IF you can safely isolate it that's another thing not bothering you. In the early days of large aircraft , certain parts of the hydraulic systems were turned off after you got into the climb and all was settled down.. That reduced the load and risk of leakage. Bruce I have an isolator for my van that applies current to my 3rd battery when the basic batteries are charged. It only senses voltage so why can't you apply that concept. This thing is made in South Australia but you could use a diode actuated relay that would be much lighter. Nev
  7. They were actually quite reliant on a large oil flow and designed to have one as the 4 valve heads were under covers and 4 valve heads do have a "cooling between the exhaust ports" problem. Where you have cam chain runs and covers, you can't get a direct heat flow to the fins so the fins are useless in those areas, and are just for LOOKS. A lot of modern bike engines rely on oil for heat transfer as they are inadequately finned but do run very hot and are somewhat notorious for it and require synthetic oils almost universally for that reason. In the early days( 20"s). a fellow called Bradshaw made an oil cooled engine that had only the head aircooled which was almost instantly nicknamed the Bradshaw Oil Boiler and wasn't very successful. Note He didn't even attempt to cool the head by anything other than air but it was very OPEN as all the designs of the period were... Heat transfer is a direct function of temperature difference. ALL other things being equal. . If there.s NO difference there's no heat transfer. It flows from hotter to less hot An engine with head temps at 230 C (the usual upper limit) has a largish temp difference with an ambient of say 26C than a liquid cooled engine with an average radiator temp of less than110 degrees max to the same ambient. The aircooled motor has less % difference in heat transfer rate as the comparison is 230/26 and 110/26 (difference 204 compared to 74 ) Aircooled motors work better in temperature extremes than liquid cooled motors. Lots of war tanks used in the desert were powered by radial air cooled engines .Nev
  8. If you get ramp checked you should expect to be able to show that you have a system that monitors both total weight and the balance (not using fuel which can be consumed to achieve the balance) at all stages of flight and to an empty fuel situation.. The simplest plane is where the load (pilot and pax) and the fuel is near the Cof G range allowed. No weight added or removed from the Cof G range can put the balance out of the range..that makes it simpler. Tandem seats with fuel in front and baggage at the rear are the worst for being able to become risky easily. and the distances are greater so the turning "couple " possible is larger. If you look rearwards and your elevator is "DOWN" much at cruise you are tail heavy, and could be deadly at slow speeds where the tail feathers might actually stall and control is impossible. If the elevator is UP much you may have difficulty flaring to a 3 point attitude, but it's a much safer situation than tail heavy. Nev
  9. We can't make everything automated as each item becomes an extra "fail situation" issue. Carb heat is manual, as are flaps. Mixture, cowl flaps Throttle too but is sometimes automated and you can have autobrake "armed" as well as gound spoilers. One plane had automatic gear extension and read up how much trouble that caused... (as you could imagine) Yes we CAN all forget things and must constantly strive to overcome that tendency. The checklist is a check that you have DONE it. . Normally one associates certain actions with a certain stage of the flight profile. When non standard things happen that pattern gets disturbed and often things are missed due an unfamiliar situation. WE know that happens from accident investigation. We have pressure and unfamiliarity A bad combination, We are creatures of habit. and must cope with "human" failings best we can.. IF you are "missing" things on a regular basis it would be a cause for concern as it doesn't fit well with a flying environment which is, as we are constantly informed, not tolerant of mistakes or errors. Don't be rushed. Be deliberate with critical actions and don't do critical work when someone keeps interrupting you . Avoid distractions. Passengers talking to you at critical times etc. Think "AEROPLANE when you must. Nev
  10. Weighing WITH your baggage just gives total weight, which is one aspect of the equation . The other one is balance and the luggage goes in "Holds" which are different distances from the balance DATUM.. Nev
  11. The if the globe is a dud it's all OK, OK.? The current logic is sound. but the light should be green. Landing gear lights are the same and it's the convention. You have bulb test facility Press to test or two bulbs. per indicator. Nev
  12. STOL planes do one thing well and most of the other stuff poorly, including tolerate gusty and strong winds Alaska is one place where you couldn't get to a lot of places by road and to hop over a ridge and land on river rocks has some appeal if you like fresh water fishing in those places. I think I would get tired of one once I'd explored it's limits for a while in our environment.. Nev
  13. I think there would be an opportunity for a sport aero engine , turboed and with reduction gears to a CS prop. Reason ..They rarely fail suddenly and if they start will usually keep running and get you home.. They have little mechanical noise but the way they are ported they BARK like no other especially when supercharged. The turbo type quiets them a bit as it does on all engines and you can just keep boosting them. I think they warp cases as there's one really hot spot. I'm not up with the latest but they were doing well in racing outboards a few years ago. I've seen a Norton one in a pterodactyl at Gympie years ago that did long trips occasionally Direct injection is the go with all new ICE motors. The fuel can be crap octane wise and it doesn't matter. It can't detonate.. Nev
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