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About FlyRatz

  • Rank
    Senior Crew Member
  • Birthday 11/30/1962

Profile Information

  • Location
    Stuttgart, Germany
  • Interests
    Piloting CTSW
    Ladies :-)
  • Gender

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3,965 profile views
  1. Hi, I was offline the last weeks and apologize for the late answer. It is like Tom and Roger assumes. I have several CTs to maintain and they fly a lot. Every time I need to pull an engine, I replace the rubbers. From this perspective 100 is not very much. Markus
  2. FlyRatz

    Glide Ratio

    yes, I know this behaviour. However at 1400 and below. Hmmm, how accurate is our tachometer? At 1600 all ULS in my hangar are smooth and stable.
  3. FlyRatz

    Glide Ratio

    How do you call such Instructors? Big ball guys?
  4. FlyRatz

    Glide Ratio

    Corey, I will do the same test with engine stopped and prop without windmilling. I expect a small amount of a better glide if the engine is stopped. My expectation comes from the experience, that a windmilling engine at idle can lead to a surplus of thrust, if the idle RPM at ground is high. The CT I flew for the test has a idle RPM at ground of about 1600. I am convinced, that this produces drag and not thrust. We will see. I need to wait for better weather and will test again. Markus
  5. FlyRatz

    Glide Ratio

    You are lucky, wednesday we compared the climb performance and the glide ratio of our CTSWs. I had a logger running while my companion did not. Here are the figures: CTSW 2007, takeoff weight 1027 lb, glide at 65 kn, -12° flaps, engine idle (fixed pitch prop), winds calm (see metar). The result is a glide ratio of 13.2. GlideRatio-DMASV-metar.pdf Glidepath-GoogleEarth.kml
  6. This info stays between you and I. It doesn't get published. You can buy them in any quantity you want.



    1. FlyRatz



      many thanks for this info.  And these are exactly the items I had trouble with. So be careful!

      Btw: in the meantime I created a oil filter wrench by myself because shipping your tool to me would be too expensive. Thanks for the inspiration.


      Ölfilterschlüssel Rotax-912.cdr

      Ölfilterschlüssel Rotax-912.dxf

      Ölfilterschlüssel Rotax-912.pdf

  7. Would you be so kind and share your source with me? A lot of 100 is reasonable for me.
  8. Oh oh, you remind me on something. End of last year, I had bad luck with replacing the doughnuts. I bought the rubber parts from a FIAT Dealer and got rubbish. They lasted for exactly 4 weeks and needed to be replaced again. I got a bad batch as it turned out after inspecting them. The rubber was soft and clammy. As far as I know, FD buys the parts at the same source as I did. So it could be, that you get a bad batch as well if you buy it at FD. Just for your info.
  9. FlyRatz

    Sinking Floats

    While discussing floats, I have a new theory why one could have a sinking problem and others may have not. Premise: The floats are made of foam, which is closed porous. Airplanes cycle between different altitudes which leads to different atmospheric pressure between takeoff, cruise and landing. If the inner pressure of a foam bubble in relation to the outer atmospheric pressure exceeds a certain limit, the foam structure, building up a bubble, will crack. Conclusion: If an airplane is operated often at high altitudes while the departing and landing fields are at low elevations, this might lead to sinking floats more often, than in the other case. What do you think? Is this theory intelligent or completly idiotish? I think, this could explain why some Rotaxes has problems with floats regardless the float generation used.
  10. FlyRatz

    Drip Tray and the new cylinderheads

    Hi Roger, There are voices from inside, if you crank the prop very slowly by hand: You want to listen? Click here Chatty gear Edit: Oil is AeroShell (red) Friction test done and friction is at upper limit Gearbox is quiet when cold
  11. FlyRatz

    Cost to replace/overhaul the engine.

    Labor: I did a replacement recently. I am slow and I am scrupulous and it took me about 70 working hours to replace the engine. My guess is, a man like Roger or Corey could do it in the half?(But they will propably cost at least the double )
  12. FlyRatz

    Drip Tray and the new cylinderheads

    Boys, do you remember my thread Be careful with the threads on your engine? You see on the pictures the replacement engine while the installation was in progress. There is no need to be nervous about untightened nuts, open hoses or something similar you could see on the pictures ;-) @Bill: you have a sharp eye. Indeed there is very little clearance between the tray and the fuel bowl. For an inspection of the bowls, you need to either remove the carbs or the trays. The latter will be the preferred option. btw: Today the new engine has 3 hours flight time in the logs and the first problem arises. The gear is very chatty if the engine is warm and if you move the prop by hand. Grrrrrrrrrr :-(
  13. FlyRatz

    Drip Tray and the new cylinderheads

    Hi guys, i come back to this topic with the final solution. FlightDesign created new trays which fit the new cylinder head. The bird is back in the air. Enjoy the pictures
  14. FlyRatz

    Let's talk about grounds. Again.

    Sounds comprehensible to me. Fingers crossed that holy Ohm left the plane
  15. FlyRatz

    Be careful with the threads on your engine

    Thanks Corey for asking. I discussed again with my Rotax representative and they persist in their view of things. My interlocutor told me, he had a discussion with the engineering of Rotax in Austria and they actually do not allow to use HeliCoil despite the fact, that there are HeliCoil inserts at some threads of the case (Parts catalog figure 72-20-00-1, item #2). He assumes, leading edge air foils is wrong with their assessment. Now the ship has sailed. The replacement engine is on the way to me.