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Almost an incident.

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  • Almost an incident.

    I woz told years ago that complaisentcy usualy sets in on the average pilot at bout 400/500 hours.Maybe I'm just slow,but my first "comlpaisentcy" incident nearly happened a couple o days ago, at bout 2500 hours.[:0]My neibour on the south side had just taken possesion of a brand new 100hp 912 powered Rosco machine and he asked if I could test it for him,coz he don't fly yet.I didn't know wot he wanted me to test,but I wasn't go'n to say no.[]At the first oppotunity I gave meself a day off and RAFed down there to checkout this new bird.[]After set'n up the 26' AKs and fire'n up the 912 everything looked and sounded sweet[].But I woz git'n hungry so decided to take it for a blap after I'd bumbed a feed.To cut it short the machine/blade combination was excelent and performed flawlessly in the hot gusty conditions.Plenty of power,lift,blade inertia and,after tak'n the windscreen off,control[}].Shane woz pretty happy that I woz pretty happy and never said I couldn't fly some more so I started play'n round withit a bit.Know'n it had more power and 'stiffer,new feel' to it than me trusty ferel I took it easy .After bout 10 mins I reckoned Shane might be git'n upset bout my burn'n his fuel so decided to put it away.The trouble is,his new strip is on the leeward side of a row of 60' gums,make'n a excelent wind break.I woz 'hovering' over the updraft that was cum'n off these trees at bout 200' when I chopped power,planing to do a 360# dive,load the blades and let the wind drift me back far enough for a spot flare in frount of his brand new hanger/shed.The plan was go'n perfectly till I got below the tree line,head'n toward the hanger,not much AS but plenty of inertia in the blades,and no out gate.My judgement hadn't taken into account the lack of a headwind when I got below the trees ,and the loaded blades seem to be take'n for ever to wind down as I slowly drifted towards his shiney new shed,with his 'expensive' new machine.I woz way past the last 'out gate' and only 40' from contact with the shed,2' off the ground and no wind to stop me,and experiance was tell'n me that if I didn't do something quick,there was go'n to be a big,expencive and very embarrasing mess.[B)][!]The only thing left to do was flare,hard and short,and to my releif and somewhat supprise,it only ballooned bout 10' and then settled under inertia with only a slight bounce,10' short of disaster.I never told Shane how close I woz to landing his new bird IN his new hanger,but no dout he'll find out one day.A moment of bad judgment in a machine I'v never flown before scared the cr#p outa me,and hopefuly now will be a little less complaicent[!].NB.without try'n to stir sh#t or be cheeky[}],if I woz fly'n the ferel,it'd never have cum so close coz bad judgment in my STABLESS ferel in this situation can be safly countered with a hard ,held bachstick.This will cause the disc to tip back,the machine will follow with out 'ballooning' and the stab try'n to hold it level ,and a disc at 90# to the ground/air flow makes a very effective air break,head wind or no head wind.[^]That is not a sugestion for anyone to remove their stabs.[B)]More like another reason why I don't fly a stab on the ferel.[]Ignorance is bliss............but only till you realise you were.

  • #2
    Did I read correct when you said "after taking the windscreen off" ???A tip for all those wanting to wash off rotor inertia is to move the stick back and forth, before you reach the "last gate". This will cause the rotors to loose their lift. Works for FW too on days when after flaring, they seem to float for ages.Glad to hear that you are having fun there Birdy You never know how far you can go, till you get there !

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    • #3
      I'v accidently tryed that ,mainly out of panic in me early hours.It seemed to have no positive effect,only made it buck.Wot I'd normaly do is yank the stick from side to side,but I didn't have the tree clearance to do it this time.This'll arrest the forward speed quickly but not wash off any rrpm,providing a softer landing.Ignorance is bliss............but only till you realise you were.Yes,you did read correct Brian,I hate windscreens below 100'.[]

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      • #4
        quote:Yes,you did read correct Brian,I hate windscreens below 100'.[]Birdy, How do you get on with the windscreen on the RAF?Tim McClure

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        • #5
          Don't get so agressive with the cows in the RAF Tim,and usualy cruise round alot further off the deck,bout 200'.'Feeling' the air isn't as critical.Ignorance is bliss............but only till you realise you were.

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          • #6
            Ahh..."feeling the air" that answer's the question. I found when I went to a pod from an open frame that I couldnt feel the air iether but soon replaced feeling the air to feeling by the seat of my pants.Did you have the tank full Birdy when you test flew the Rosco 912?You never know how far you can go, till you get there !

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            • #7
              Nu,only bout 1/4,but with 1/4 throttle to spare in a short TO,I dout a full tank would'v made much difference.He could hav a 200l tank on that thing and muster nonstop for two days.I can only 'Feel' through me cheeks for a couple o hours Brian,after that the skinny,unpadded things go numb.Ignorance is bliss............but only till you realise you were.

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              • #8
                G'Day BirydYa know Birdy for a SCG you tell a perty good yarn,whitch is about 40%of what keeps me reading this forum.I realy enjoy as well as learn alot from your tells.I am so glade every thing worked out so you did'nt have to buy the man a new shead.[]Keep up the good work.Best wishes Sonny

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                • #9
                  Thanx Sonny, I try to keep m educalional.Ignorance is bliss............but only till you realise you were.Ingratitude stinks.......be generous carefully.

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                  • #10
                    not bein a pilot yet im probably talking out my ar$# but while i was out fixing a tractor i was thinking about this story and wondered if any one has tried a dunny lid type stab???i meen put a hinge on the front so the stab can go up and let the machine flare/brake as hard as the pilot likes but be held by stopers so while straight and level it is an efective stab for countering PIO.just a thought[:I]

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                    • #11
                      It's not a dunny lid, but I already got a hinged stab on me RAF Hoody[].[and it works perfectly[], am hope'n to git some vid footage look'n back while I chuck the RAF round a bit and take it too cooma[].]Ignorance is bliss............but only till you realise you were.Ingratitude stinks.......be generous carefully.

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                      • #12
                        birdy, sorry i diddnt mean to rename your stab but i haddnt heard of one beforehow does it perform and are you going to put one on your ferel???i hope you hav a copyright, so if someone were to market them an SCG might make some money[]we could go into business and sell firebird paul,birdy's raf dunny seat stabwhat do ya think??? hee hee he

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                        • #13
                          I'v heared of controlable stabs before,linked to the stick, not free float'n like this one.It performs spot on and no, I don't reckon I'll bother put'n one on the ferel.........yet.[]You ask the question,what do ya think??? Then you answered it,hee hee he[].Ignorance is bliss............but only till you realise you were.Ingratitude stinks.......be generous carefully.

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                          • #14
                            There has been another hub bar failure and the pilot was lucky enough not to have an accident, as he received enough warning to put the gyro down safely. The bar had been machined down from 1" to 3/4" where the rotor mounts and the manufacturer assures us that there are no more similar hub bars in service. The crack appears to have started from the leading edge of the bar and worked back. It would have first been visible on the front of the bar.More information and photos to follow as available.Tim McClure

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                            • #15
                              Tim,For the pilot - you lucky bugger.. you've just won the best lottery. Was it there at pre-flight? Did you have a really good look?For the manufacturer...Who would be dumb enough to machine the thickness of a hub bar?Why not machine the teeter block instead, where the loads are of no real significance and are compressive?I can't work out if this is gross negligence or plain stupidity.... we did have all those postings with pictures relating to RAF hub bar failures where the hub bar had been machined and cracks were showing at the machined points, this bar was known to the manufacturer and apparently nothing was done to recall it. If the pilot views this forum as well he should ask himself some questions too.I believe we need a campaign to immediately ground all machines with hub bars that are not manufactured from 6061-T6 and / or have any machining work done to reduce their cross sectional area, ie, other than the bolt holes for the teeter block and blade mounts. As I have posted before, the defects raised by machining and drilling go to more than 1mm below the apparent surface. Reducing a 1" bar (25.4) down to 3/4" (19mm) by gouging the metal off effectively gives you a hub bar with an actual thickness of 17mm, or 11/32", and I do mean 'gouging' because that is what it looks like at a microscopic level, while our eyes can see it as being shiny, polished and beautiful, at the all important crystalline level the metal looks like a dried out lake bed, the cracks run deep.Hope this helps,Nick.

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