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eightyknots

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Posts posted by eightyknots

  1. You can make a brick fly if you apply enough force. A lot more lift is produced for an equal amount of thrust if the wing is cambered. Aerobatic planes are hugely powered for their size, so they will fly quite well (in any orientation) with a fully symmetrical airfoil. Missiles are much the same.My argument is that's it's not a "Newton vs Bernoulli" thing, it's a combination with any form of wing somewhere on the spectrum.

    I am with you Marty. It has to be a combination of Bernoulli and Newton.

     

    The CH701 and Savannah aircraft have fat "high lift wings" and that is Bernoulli at work. But, with leading edge slats (701s) OR vortex generators (Savannahs) a large angle of attack is possible putting Newton to work.

     

    Bernoulli and Newton make a great partnership!

     

     

  2. Hi AllAfter a six and a half year hiatus I have returned not only to the Aircraft Pilots forum, but to the skies around Perth (well, around Bindoon anyway, YBHL).

     

    I have a bunch of questions, and was really not sure where to post given some are around training, some are around RA vs GA, some on medical etc, so I thought I'd just start here.

     

    Some quick background:

     

    First ever lesson was as a 46 year old in February 2010, aiming for PPL at Jandakot and starting out in C152's.

     

    Passed GFPT in October 2010, converted to C172's then flew only about 10 hours late 2010/early 2011 before moving my training to Bunbury in February 2102 for navigation and hopefully PPL.

     

    Did 3 dual navs and a solo before having a wrestle with CASA over the type of vision correction I use (a special type of contact lens). They wouldn't budge, I wouldn't budge, and I ended up shelving it with the prize in sight. (Even passed my PPL theory exam).

     

    I never thought it would be 6 and a half years until I got back in the air.

     

    But one day about 6 weeks ago, I looked into it again and started discovering how things had changed in GA & RA since 2012.

     

    So first I converted my GFPT to RPL (just because I could), and made the cutoff date of August 31 for a no-charge conversion with about a day to spare.

     

    Then I Googled 'flight training in perth'; clicked on a few links; made a few calls; and found myself going down the RAAus path.

     

    I had found that the cost of GA training was becoming prohibitive (for a man of my modest means), and that the cost of RA was very affordable.

     

    So I've embarked on a GA to RA conversion, flying J170's.

     

    I've had 4 hours covering off all the usual basics, plus stalls, some circuits, and FLWOP.

     

    It was just a little bit different from a Cessna, I can tell you! (although I'm sure many of you would know) but it came back to me quicker than I thought it would, although the stick vs yoke thing, with the throttle on the wrong side (tongue-in-cheek) took a little getting used to.

     

    So, hopefully not too far from getting an RA pilot certificate, then on to 'cross country' and my original dream of flying further afield.

     

    The best thing though, is it seems that there is a path from RA to GA, so if I wanted to switch back to GA, or do both, then I can.

     

    That's probably always been the case, but it seems so much clearer now.

     

    Anyhow this post is already way too long, so I'll post my questions later.

     

    Feeling a bit pumped about being back in the air.

     

    Cheers

     

    Mick

    Hi Mick,

     

    I wish you all the best!

     

     

    • Like 1
  3. JG3, you wrote in your comprehensive report:

     

    So I extended the original pitot tube, with a 10º downward cant to better match the airflow at high angles of attack. With this canted pitot, the ASI readings matched the Hall gauge right down to 30 kts. This canted pitot is especially essential for correctly measuring stall speeds at the corresponding high angles of attack that this wing is capable of.

     

    I was wondering if the angled-down pitot tube is accurate at higher (say cruise) speeds? If so, it may be worthwhile to keep it permanently angled down.

     

     

  4. That's so bloody sad, and she past the same day as she made her last post on here. Such was her passion for flying her much loved Gazelle.Unfortunately I got on the wrong side of her with a stupid comment which was taken the wrong way it was intended in the early days, and I regret that, but unfortunately I can't change the past.

    Rest in peace Debbie, you will be missed by so many.

     

    Planey.

    Don't be too hard on yourself, Planey!

     

     

    • Like 1
  5. Hi Patrick,

     

    I have just started to construct an ICP Savannah. I have only a put a few hours into it, being right at the beginning of the build. Others claim it goes together well and, after doing a fair bit of research, this looks like the best self-constructed aircraft kit for sale presently ...at least the best I could find.

     

    Furthermore, those who own completed Savannah aircraft claim that they fly well too.

     

     

    • Like 2
  6. Our Aerodrome (YSGR) was council operated and poorly maintained. We (owners of hangars) lobbied Council and got the Crown Lease transferred to us. It is now very well maintained & we recently resealed the 1000 metre strip. It costs around 30k to operate for a year which includes a sinking fund reserve to go towards runway resealing etc. All the labour required for mowing, fencing, equipment maintenance & other upkeep is by volunteers. A $5.00 landing fee ($10.00 for GA) is a very small contribution towards this cost. Some people still whinge about it though or just don't put anything in the honesty box.

    That's good news KGW: well done to the entire team. I hope that the Clarence Council still slings some funds your way as a thank you for taking this over!

     

    (My son lives in SG, a relatively short walk from the aerodrome. Next time I am there I would love to catch up)

     

     

  7. [ATTACH=full]61633[/ATTACH]

    This is an original picture when I first made it and tried it out.

     

    The telescopic bit is simply two bits of aluminium tubing that one inserts into the other.

     

    The internal shape of the Jabiru panel surround lender itself easily to fixing the outer static tube to the ridged flat inner surface.

     

    This photo was a trial with simple plastic saddles holding the tubing in place. I subsequently replaced it with metal saddles. ( not aviation quality I have to admit. I couldn't get anything in aviation aluminium of the size to match the tubing but made the considered judgement that it was not going to be stressed or anything in use so was of no safety consideration that they weren't aviation quality.

     

    What you can't see is the two small brackets that join the rear of dash panel to the inner mobile slide tube. Essentially each is just a small section of channel just wide enough to fit across the end to tube and held in place with a single through bolt - allows it to pivot/rotate forward and downward to allow the dash panel to tilt forward to allow access to the back of the panel.

     

    The front face of the bracket is pop riveted to the back of the panel.

     

    I fabricated a small spring loaded pin housed in a folded metal cage - the pin drops into a hole in the inner tube to prevent the inner tube pulling out all the way and dropping the dash panel into your lap. In the end it was not really needed because once you connect a few cables to the instruments you start to limit its travel anyway.

    I like it. Very practical!

     

     

  8. Mine is not heavy. Consists of two lengths of aluminium tubing ( about 30 cm long) fixed to the inside of the dash housing under saddle clamps.

     

    And then two bits of tubing that telescope into them. These are fixed to a short bit of channel section aluminium that is pop riveted to the dash panel. The bolt joining them provides pivot action to tilt the panel.

     

    When pulled out there a couple of spring loaded pins that drop into holes to stop the moving tubes falling out the end of the static tubes. Total weight would be about 30 or 40 grams I’d guess.

    Would you happen to have a picture of this?

     

     

  9. This is an aircraft known as a Land Africa, allegedly a stolen design from an early ICP Savannah. Near the end the plane lands on the intersection and turns right angle to starboard within the intersection.

     

     

     

    Watch "Land Africa aircraft, short take-off and landing(Aterragem curta)" on YouTube

     

     

     

     

     

     

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