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pylon500

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Everything posted by pylon500

  1. pylon500
    Was talking to Peter Harlow last week, he could see the interest coming and put in an order for five ASAP, has two left !! Time to order more....
  2. pylon500
    Hey, thanks for that, it actually worked, all the way from the home page to the .pdf forms page. Yes, the forms have been changed, wonder if they will knock back submitting old forms?
  3. pylon500
    Thanks for the offer, I have a BFR booked for tomorrow, but I think I've got a blank form. My point was that the site isn't loading (for me) either with my original bookmark, or the links in the emails I've had from the office. I'm assuming that the new site is using the original web address [https://www.raa.asn.au/]. Can't even find a backdoor via google.... OK, think I've found the problem, this is a NEW site, and no-one has thought to make it backward compatible.. I can't update the operating system on the Mac I'm using, and the Safari browser I use often gets "Your browser is out of date", mainly from the flash players. Just loaded via Firefox, and (more or less) got the site (no colours?) Gonna have to get a new Mac soon... ps, Looks like they've changed the form again..
  4. pylon500
    I'm surprised there hasn't been an update to the charts..........
  5. pylon500
    21:25 Friday, and I'm not getting either the old page or the new one, has it crashed? Bit annoying if I want some forms for tomorrow...
  6. pylon500
    Meanwhile, back at the 'Firewall forward' thread, there is a Rotax Service agent, with manufacturing capability, that has done one conversion with another coming. This was a J230 fitted with a standard 912ULs and 3 blade Sensenich ground adjustable prop. Depending on pitch setting, cruise speed is similar or could be a little faster, but the real improvement is awesome climb rate and about 15% better fuel economy. Wasn't game to ask the conversion price, but the customer was quite happy.
  7. pylon500
    It also suggests that Pipistrel thought about reasons why one would deploy a chute, and ripping the wings off must have occurred to them, thereby deciding to attach the chute to part of the airframe determined to stay intact after ripping off said wings !! Good thought for all designers out there........
  8. pylon500
    260hp? Most seem to have missed that 914's are only 115hp for 5 minutes... = 230hp. Also, from a design view, he's probably loosing/absorbing 15~20hp countering the very high thrust line..? A motor on each wing would give him even better performance, but at the cost/risk of an asymmetric engine failure. Everything is a compromise.
  9. pylon500
    Guess it could be either. General feeling is 'Fan - Jet', means a fan (shrouded) turned by a jet engine. 'Ducted Fan', usually implies a shrouded fan turned by a reciprocating engine. Very few people use the term 'Shrouded Propellor', as propellor usually refers to a largish (in proportion to the aircraft) airscrew of up to five blades. I say this, as once you go to six blades, people tend to refer to them as fans again. So ducted fan implies five blades or more, inside a shroud. ps; if you want a ducted fan to work, you really need to put flow straighteners behind the fan...
  10. pylon500
    These should be our own photo's but I can't resist;
  11. pylon500
    Is that a large prop, or just a short(er) plane? Don't you like gliding clubs?Fun to fly, but a maintenance nightmare....
  12. pylon500
    I had thought of getting involved with that, but figured it would probably jinx a day of flying, plus I'm not on facebook... Having said that, had two flights today; first cross country with an early solo student, and a refresher flight with a guy that hasn't been able to fly for about six months. 1.7 hours total in a Foxbat.
  13. pylon500
    Believe it or not, not everyone is on facebook! If the photo's on your computer, you can upload it via the button over there
  14. pylon500
    Australian camouflage;
  15. pylon500
    Maybe both of the above, with some experiments into zero G 'entertainment' ?
  16. pylon500
    Well, he didn't land on bitumen, so it wasn't the ass'fault.
  17. pylon500
    I've picked up lots of pieces left from 'real' pilots that thought they would easily be able to fly a 'toy'
  18. pylon500
    Oh yeah, they're getting there.... Many of those guys also fly RC, to experiment with new moves.....
  19. pylon500
    A bit more realistically; (Copied from elsewhere) While two-cylinder engines with about 1000cc of displacement power Polaris RZRs, Can-Am Mavericks and Arctic Cat Wildcats, Yamaha doesn’t really make a high performance twin. Its only big twins are found in its Star line of cruiser motorcycles. If my thawed out grey matter is correct, a three-cylinder engine might be in our future. Yamaha uses triples in both its motorcycle (847cc, 115 horsepower) and snowmobile (1049cc, 130 horsepower) lineups. A triple would be unique for the Sport UTV segment, but I’d imagine Yamaha wants to be different. Of course, if Yamaha wanted to be really different it could put one of its screaming four-cylinder sportbike engines in a new UTV. An entire racing class was made for people who put a Yamaha YZF-R1 motorcycle engine into Yamaha Rhino chassis, but that seems a touch extreme for a stock machine.
  20. pylon500
    You know it's an RC model, don't you?
  21. pylon500
    Yes, your idle could come down a bit, 80hp should idle down around 15~1600rpm (the 100hp's start to get a bit lumpy down there, they like around 1800) With max WOT level of 5250, looks like someone's been trying to squeeze all the speed they can at top end? The 100hp's start to over-torque the gearbox/crankshaft with a WOT that low, 80hp's not so much a problem, but should still be able to see around 54~5500 straight and level. With a 80hp Sav', you're not really going to get much faster than you've got, but you are probably loosing a bit of your STOL performance with the prop that coarse. General rule of thumb was to set up the prop so that static WOT was between 52~5300, then decide if you had a draggy or clean plane, and go maybe 100rpm either way, ie; if you've got something like an Esqual, you could set to around 5100 static, but with a Savannah, you will probably be closer to 53~5400 WOT static. I'm running a 100hp Foxbat, and can loiter at 70kts with around 4400rpm, and nearly 90kts at 5500. Straight and level WOT, I start to go past max continuos of 5500rpm. It's nearly ALL in the prop, carbi balancing and the like, tend to show up down around idle (rough), jets, needles and balancing are more to do with fuel consumption and are shown through the EGT's.
  22. pylon500
    On my Ferry trip to alice, I went over to Avgas (was using 98 out past Moree) at Thargomindah for $2.28 a litre. Not too bad considering it's about $2.20 here at Taree. Changed when I got to Birdsville though, $3.16 a litre ! As for the roadhouse, (or bakery as it was) the food was pretty expensive without worrying about the cost of fuel. ie; small sausage roll, chicken/mayo bun and a small box iced coffee = $26.50
  23. pylon500
    It's hard to actually create anything totally NEW these days as most concepts, and many iterations thereof, have all been worked out somewhere in the past. All we can do now is continue to 'mix and match' and bring newer materials into the game. I must say that the Jumo engine is an interesting read.
  24. pylon500
    While caution, and maybe a good dose of natural fear, is healthy around props, a cold, non primed 912 is pretty safe. The possible worry is when turning a geared prop is the sudden 'ramp up' of compression, for a relatively slow turn of the prop, that tends to create a quick 'over compression', right at the point that the CDI pickups can energize. The history of treating props as 'live' stems from the introduction of the 'Impulse' magneto. Here the core of the magneto is held back via a spring until the prop passes 'top dead centre', where upon the core then spins rapidly back to position, moving the magnets quickly, thus energizing the plugs. Thus, with an engine primed and ready to run, the prop only had to be pulled up to, and then just past, top dead centre, and the engine would fire. Not a great deal of effort required to get started. You can hear the impulse system working, if you stand near some brave soul as they turn over most of the old GA engines, as a loud 'clack' as the engine goes over TDC.
  25. pylon500
    'Cause, what he would really like would be if we kept buying new ones......
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