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RFguy

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Everything posted by RFguy

  1. RFguy
    Hi Jim. yes. you can send me the decapitated kit, or, do we make some new led assys.... I got one of those lens, its around somewhere. I think a small xenon flashtube beacon might be easier, all in the lens . I'll talk to my LED man do see if he has any super high brightness sticks, also, tomorrow I will investigate if I can get a flexible circuit board done at a reasonable price , essentially high brightness leds on a tape so it can be wound helically inside.
  2. RFguy
    and stabilator needs to be pulled right back (control column full back) so water can drain. I had the covers on the stab and tail, but that requires the stab to be at neutral position, and that means water cant get out.... so, leaving those covers off...
  3. RFguy
    yeah, well no hangar space currently available at Cowra. I was in one, but that hangar is now getting lunch room, toilet etc and no room for my plane . CLub hangar isnt any good as the door opening isnt wide enough.... hangars should be built so their doors open to the edge of the hangar !
  4. RFguy
    2nd day in a row of heavy rains. Recency is king so had to fly (7 day cycle) . Including 55mm that day, and 30mm in the previous 2 hours! The airport looked like an inland sea. Finally, late afternoon with cup of tea in hand at the clubhouse, several hours of waiting.... at 1715 the rain stops & I can see the mountains (so I can see to at least 750'AGL) and to the NW where the weather is coming from, blue sky. A few kg of water in the H-stab, glad I tipped that out , might have been a CofG surprise. plane is outside with large body canopy + wrap around engine cover over it at the moment, Just a 0.7 in the Piper , but most enjoyable. Flying after heavy rains in the summer, no bumps ...is delightful...... and those interesting low lying cloud clumps. Flew 15nm NW up to Thruster's farm to look at his half-cut wheat crop with the header parked.... where it was brilliant wall to wall blue sky . flight was 750-1100 ft AGL at a nice and sedate 100 knots at 25 lph , just poking around , looking at the puddles and places to land. relaxing . Bit of carb heat required at times in the 17degC misty skies. Not a single other aircraft heard. No one around...so conducted NDB approach (in visual). Blue sky edge of weather visible in top right hand corner of photo.
  5. RFguy
    Skippy, really ???? ? I think I provided quite useful advice , having seen this sort of fault PRECISELY AS DESCRIBED !
  6. RFguy
    sounds like carb probs. float bowl float needles..... With alot of vibration, this might flood the float bowl, or otherwise have it 'not to spec' I venture a guess that vibration and the sputter are unrelated except that vibration (due to maybe mismatched carb operation (needles, float height ) causes the sputter also, check floats actually float the correct height while you are there. Nev is right with the Dashpot question. have these carbs had an overhaul kit through them ?
  7. RFguy
    well done. airplane climbs like a scalded cat without instructor aboard eh ?
  8. RFguy
    was the pilot the original builder ? Otherwise up to the original builder to do the test flying and V speeds, and the new owner to trust but verify......
  9. RFguy
    just come to look at this.... some numbers.... 800kg and only "7.92 m (26 ft)" wingspan, only 110.5 sq ft ????? it would need a very high lift wing to make 35 kts, and thus to do 115 kts cruise, would need a big engine. which it doesnt have. calculating..... I estimate, with that engine, and that wing and that weight, something like about ... ~ 55 knots stall speed clean...... **Brendan - I think the numbers , where ever you got them they are KTS not KM/H - then the stall speed makes sense. a 30 deg bank would increase the clean stall to 59kts. so perhaps just another boring stall spin story, nothing to see here....
  10. RFguy
    mode S doesnt mean ADSB. ADSB is a Mode-S extension. it's quite fine to have Mode S transponder (plain vanilla Mode S, not Mode S including ADSB) and ADSB OUT (skyecho) going.
  11. RFguy
    We'll see how dark the ATSB roast him. Can't have been a guy that does any maintenance. Working on planes you realise just how light and thin stuff is made....(skins, ribs, control surfaces) ....and how easy it is for controls to jam. replacing aileron cable and re rigging (wings) from scratch the Piper has taught me to be quite afraid (wary/cautious) of the potential for control surface jams and failures. The Jabiru push pull Teleflex is oh so much simpler and I thinik far less chance of anything going wrong, if you don't mind the slop. (which you get used to)
  12. RFguy

    C-5M Super Galaxy.jpg

    RFguy commented on red750's gallery image in Military

    C-5M Super Galaxy.jpg
    Reading on wiki. seems gear up landings happen to these guys also... "In July 1983, C-5A Serial No. 68-0216 landed gear up at Travis Air Force Base, California. There were no injuries. The accident occurred while the crew was performing touch-and-go landings, and did not lower the landing gear during the final approach of the day. The aircraft received significant damage to the lower fuselage, ramp, clamshell doors, and main landing gear pods. The C-5A was later flown to Marietta for repairs. "
  13. RFguy
    interesting lens no specs on luminosity. limited on brightness I think on the small number of LEDs. but probably fine in the circuit on a dark night
  14. RFguy
    Brendan The answer is .. yeah you can just set it to the known height- that's good enough for circuit work. There may be some difference with the published local QNH, perhaps a hecto either way. Once you get airborne though, flying hemispherical altitudes (4500,5500,6500,7500 etc) you are expected to be flying on the area QNH, regardless of what your altimeter /setting was at the aerodrome. and ATC separation requires / expects this. At Cowra, I just set the altimeter to the airport height 970', and then if going somewhere, once established, I set the altimeter to the area QNH (which I will have got from my weather and NOTAM checks before flight). or, you can call up Centre on the radio, and request the area QNH. When in the vicinity of my destination, I'll set the altimeter to the AWIS broadcast QNH, if AVBL.
  15. RFguy
    Also, footnote - Flashtube is still best option , probably about the same complexity as driving high power LEDs.
  16. RFguy
    Jim, I will get one of the lens and those bulbs and see what I can come up with. I've built alot of led flashers and lights with modern leds. I have a 19,000 lumen flasher on the bike...
  17. RFguy
    what? We're not using rotating flashing beacons. this sort of light create very little drag. it is a good shape.
  18. RFguy
    Nice work Jim. I can do the flasher electronics for us. Let me know the precise lens used- I will buy some and generate some flasher electronics. Do we have a suitable LED 'bulb' to go init? there will need to be some optimization of LED launch location to maximize the lens coupling I will get my Jab flying again soon enough, I'll follow your path.
  19. RFguy
    If it was high summer, you might do it in one day- IE lots of light and potential for a 2 hour rest in the middle.. but I am sure you are going to feel like sh1t after two legs ... IE not going to enjoy the last hour, and ask yourself, would you pass your BFR in the last hour of the 7 hour flight??? >3.5 to 4 hours a leg is about the threshold for where I no longer enjoy it and, and the threshold where I might be fatigue compromised to deal with a difficult crosswind. But, it depends on the weather. and having an autopilot if good weather might assist depending on your aircraft rigging and fuel balance... (My Piper flys hands off S&L) Going out to broken hill at FL125 with no wind, clear skies, I was fresh as a daisy after 3.5 hours... Going from the YPMQ on coast over to Cowra, a similar distance, in poor, awful terrible weather crossing the range the whole way, I was trashed after 3.5 hours and elected 'to the easy way out' and do a straight-in & land on the grass at Cowra into the wind, rather than go into circuit and deal with the moderate X wind ....
  20. RFguy
    use of a rubber duck inside a metal bodied aircraft is never going to work well, the metal; body at aviation wavelengths ~ 2.5m is like a shield can.
  21. RFguy
    and AC 43-6D (faa.gov)
  22. RFguy
    it takes a bit of time to do because the altitude encoder needs to be walked at a reasonable rate (500 fpm) up AND down from peak altitude, and corresponding transmitter pressure altitude needs to be checked off. Most seem to use a a climbing 9declining pressure) rate and just watch the dials on the transponder and the instrument pressure generator. output of the encoder is 100 ft steps. +/-50' / 125' error, Per CAO100.5, section 14, refers to Appendix F of FAR part 43 eCFR :: 14 CFR Part 43 -- Maintenance, Preventive Maintenance, Rebuilding, and Alteration (FAR Part 43) More advanced gear reads the PA from the decoded, transmitted waveform, and checks for waveform fideltity, timing , which these days will be working, or not. The two techs I have see use a little buggery box that generates a ping to the transponder next to the aircraft (a few microwatts) and lists for the return and displays it. for those interested in the other instrument requirements - how to check : and has requirements, tolerable errors etc , subpart E eCFR :: Appendix E to Part 43, Title 14 -- Altimeter System Test and Inspection (Appendix E to Part 43, FAR)
  23. RFguy
    So, these Generative AI tools, while pretty useless for facts (they just regurgitate) , I am surprised how well they enact a summary when asked. That 2400 reduced to 200 words was impressive and succinct .
  24. RFguy
    I've asked Google Gemini to summarize Mr Stewart's last post: ---------------------------------------------------------------- The witness is expressing frustration and anger towards a group of people who they believe are not being respectful or helpful. They claim to have witnessed an incident involving a pilot and a plane but refuse to provide any further information or video due to the negative responses they have received. The witness accuses the group of being disrespectful and unhelpful, and concludes the conversation by stating that they will not be providing any further information. -------------------------------------------
  25. RFguy
    An Echidna on RWY35 in Canberra just caused a Saab 340 to go-around (from about 1000' AGL) ATC asked them to make a tight circuit . And was told " to slow down in circuit", (230 kts in the first 180 deg turn.... ), as there is 'some difficulty removing the beast'. I had an Echidna in the Hangar on Monday And a Echidna had to get removed from the RWY at Cowra last week.
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