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IBob

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Everything posted by IBob

  1. IBob
    By that, I meant initially mount the blades that way, then use your clinometer/laser/whatever to pitch them all the same before flying. I use a length of wood with a clamp on it to ensure each blade is brought round to exactly the same distance above the floor. And I use masking tape on the floor, and also on each blade where the laser is to be mounted: I measure in 222mm from each blade tip, using a sliding square set to that length, and mark that point with masking tape. Finally, a pleasing check that you have all the blades pitched the same: at certain lower sun angles and directions of flight, the sun reflects off the back of the blades. With all the blades pitched the same, there will be little or no shimmy in that reflection.
  2. IBob
    Marty, on the Bolly blades you will see a line left by the join in the molds. If you initially mount the blades with this line visible in the join between the front and back mounting plates, you will be very close and certainly close enough for test flights. Static WOT RPM is not the most helpful measure, but FWIW mine is approx 5200RPM.
  3. IBob
    Yep, I found the stick very imprecise. I can't remember the exact number, but on the Sav with a blade horizontal, each degree of pitch is about 20mm on the floor, so you really can set up very accurately....though you do also have to check tracking (any difference in how far forward/back each blade tip is), as that can throw this method out. I'm pretty comfortable with the way I do it; however I'm sure there are inclinometers now available that would do just as good a job.
  4. IBob
    Very nice, Marty: I've certainly been very happy with mine. I made a simple but effective laser pointer that hooks on a blade and projects onto the floor, used that to pitch all blades identical, have enjoyed super smooth running from day one.
  5. IBob
    Suddenly the snarly teeth and an eyeball each side of the nose looks.....very tame.........)
  6. IBob
    Bummer......(
  7. IBob
    I believe they were used for navigation training out of Booker airfield near High Wycombe in the UK where I grew up. We saw (and heard) them overhead pretty much daily in the '50s.
  8. IBob
    https://www.stuff.co.nz/business/128197697/air-traffic-controller-sacked-for-having-sex-at-work-wins-licence-back
  9. IBob
    Seems I'm more than a little out of touch......there is a whole load of this stuff, done by the same people.
  10. IBob
    All good. You'll also need something to strip the wire neatly and precisely: for the D sub pins, you're only taking about 4mm off. If you can find a well made version of this type, they are ideal: https://www.trademe.co.nz/a/marketplace/building-renovation/tools/hand-tools/pliers/listing/3524919310?bof=UX48xEQA I have the cheap knockoff version, and while I was able to adjust them to do the one job correctly, I wouldn't recommend them.
  11. IBob
    https://nz.element14.com/aim-cambridge/24-8643p/crimp-tool-d-sub-26-20-awg/dp/2357846?gclid=CjwKCAjwrfCRBhAXEiwAnkmKmR9Dghvc4buz01hKBXI1fSHAO_UaJX5kOL645VXhEovkisdvGX8ExBoCtJ8QAvD_BwE&CMP=KNC-GNZ-SHOPPING-PMAX-2357846 Crimp tool D sub 26-20 from Element14, about $70.....or borrow mine. Does the job just fine. The 26-20 is the range of wire gauges. Part of the reason for the high price of the industry ones is that they have fittings for, and can be adjusted to work with a much wider range of wire sizes (and pins?) But you don't need that flexibilty: D-sub is one size and length of pin that accepts a small range of wire sizes.
  12. IBob
  13. IBob
    I've had nearly similar but could have been worse. And there is that pattern again: a set routine that is normally reliable........... is disrupted in some way part way through..........and so not reliably completed. What I have tried to take away from my own experience is this: if my routine is disrupted, go back and start over.
  14. IBob
    Savannah POH calls for: 11.5 - 14.5psi for 6" and Tundra tyres. 29 - 36psi for 4' tyres.
  15. IBob
    Looking again at that landing: The wishbone and wheel are hanging straight down under the aircraft, so on landing one of 3 things can happen with it: It remains vertical and digs in in some way, perhaps tearing off. It tracks left and folds under the aircraft. It tracks right, where it is out of harm's way. It looks very much as though the pilot deliberately sideslipped left all the way in, which would deflect the wheel to the right, out of harm's way.
  16. IBob
    Correction: Still don't know. But the way the damaged u/c tracks after he lands suggests that the wishbone and wheel assembly are intact?
  17. IBob
    Don't know yet. The wishbone with attached wheel was still there, something on the olio or spring assembly under the fuselage has parted company, allowing the wishbone and wheel to hang down unrestrained.
  18. IBob
  19. IBob
    Hey guys, enough of the unsolicited grammar lessons! I had no difficulty understanding what Tozza has posted, and surely it's the exercise here that matters? If you don't like his pitch, you're not obliged to engage.
  20. IBob
    Hi Tozza, just did your survey. I note there us no option for New Zealand (so I identified as Australia). There are a few Kiwis here, you may want to look into that? All the best with your survey. Bob
  21. IBob
    But....apologies to F10 for the thread drift............(
  22. IBob
    OK, I was born there.....we're fine people....just misunderstood.........) I can also tell you a difference between visiting Glasgow and Edinburgh people: The Glaswegians will say 'you'll have some tea', while the Edinburgh folk will say 'you'll have had your tea'.........)
  23. IBob
    More likely Yorkshire, OK: Definition of a Yorkshireman : a Scotsman with all the generosity squeezed out................)
  24. IBob
    So. I'm not familiar with the internals of those engines: was the problem that someone did some disassembly and someone else did the assembly and missed something that had been disassembled?
  25. IBob

    Junkers F 13

    IBob commented on red750's aircraft in Unique Aircraft

    I saw a Trimotor at Strathallen in Scotland in the late '70s. We couldn't believe how slow the approach was, it seemed to take forever to come over the fence. Someone had found it in Spain, and it was on it's way to a collector in the Sates, flying 'over the top' which was probably the safest route. We tried to get a jump from the thing, but the ferry crew were understandably not interested. We later heard that it had struck head winds on the next leg and turned back, having burned a significant portion of available fuel without actually clearing the coast. No news after that, so no doubt they made it....eventually.
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