Jump to content

Madhatter

Members
  • Content count

    150
  • Joined

  • Last visited

  • Days Won

    2

Everything posted by Madhatter

  1. Madhatter

    Wheels and brakes

    Set of tundra main wheels, brakes and nose wheel. Nose wheel includes mounted tire. $200.
  2. Madhatter

    NEW propeller for CT

    No offense to you but I would think the FAA DAR would settle the issue at least for me. I was offered his position before him which I turned down due to liability, too bad I probably could have certified my own plane. I spent years in Cahokia at Parks, so I know Bellville. Again not an issue with you (you have real experiance) but sometimes frustrating to get good factual conversation elsewhere. I don't have all the answers but would like to find them.
  3. Madhatter

    NEW propeller for CT

    Like I said earlier based on data and ASTM certification the FAA DAR said no tests were required. This guy used to be a FAA FSDO manager for all the maintenance inspectors. I don't understand where all you experts come from. I am done with this and don't have any more time for this.
  4. Madhatter

    NEW propeller for CT

    Just got off the phone with my FAA DAR who did the ELSA certification on my aircraft. He confirmed that there is no issue with me using this propeller and suggested that I record the initial flight data in the logbooks which I had already done.
  5. Madhatter

    NEW propeller for CT

    My new operating limitations do not specify any propeller type, my old SLSA limitations did.
  6. Madhatter

    NEW propeller for CT

    This is not some propeller I found at a yard sale to put on my aircraft. It seems as though a lot of individuals on this forum want debate issues without any data to back them up. With all the talk about this prop it doesn't seem that many have tried to educate themselves but would rather repeat what others say. The Durandal 100 propeller is designed specifically for 912/914 Rotax engines and meets ASTM 2506-13 standard. Has anyone even bothered to know what this is? This meets FAA accepted consensus standards for LSA. This prop is not an "experiment". According to Flight Design there are 85 Flight Design aircraft flying with this prop in other countries. I look at this forum for new info so that I can research it for validity. Unfortunately a lot of professional people in the industry tell me that this forum is not worth looking at with exceptions for a few. I am not ace mechanic or ace engineer, but I try to be. I am looking for facts from people who are experts in their field and spend a lot of time doing so. I have to give Jacques credit for bringing this prop to my attention, this is the kind info I look for.
  7. Madhatter

    NEW propeller for CT

    No flex, everyone needs to read their explanation and data, it's all there. I think I have said all I can say about it, time to go to my next project.
  8. Madhatter

    NEW propeller for CT

    Just to clarify, when I refer to pitch change it is really the efficiency of the prop for all the different flight regimes. They call it ESR effect and it is the aerodynamic design which allows better rpm efficiency under all conditions. When you look at one you will see a significant difference from normal props.
  9. Madhatter

    NEW propeller for CT

    Different propellers respond differently to the engine due to blade airfoil design and pitch. With wot of 5500 on the e prop the climb rpm is about 5300. This shows that the blade pitch is changing to accommodate the increased load as per the design of the propeller. It is acting more like a variable or constant speed propeller. My Neuform prop at wot of 5650 only got 5000 for climb, a more significant load on the engine. The e-prop website data on this has very in depth analysis on this, even enough to satisfy the obsessive engineer ( I am not that type of engineer).
  10. Madhatter

    NEW propeller for CT

    Roger, all my comparative data is same plane same pilot, same oat, etc. Trying to make comparisons using multiple planes and pilots will not give good data. Sometimes new technology works, otherwise we would still be driving to the airport in our model T to get into our Wright Flyer. However my wife said she would like to have a Model T. The only problem is that I would probably want to modify it๐Ÿ˜†
  11. Madhatter

    NEW propeller for CT

    Try one, the difference is significant in performance, no splitting hairs is necessary to see it. I have never seen a prop designed like this, even the sound is very different. 3 people have told me that it sounds more like a conventional aircraft and not a pool toy ๐Ÿ˜‚. The wot target for this prop is 5500. 5400 or 5600 will not perform , I have tried them all. Also all my numbers are indicated airspeed, not true airspeed. You only have to be a pilot good enough to fly straight and level and read a tach to see it, you don't have to be Chuck Yeager on this one, but it might help. If anyone is unhappy with the prop it can be returned within 6 months for full refund. This refund policy is e-mailed on my correspondence by the company CEO. The customer service with this company is with the CEO and is impressive, no delays in e-mail, sometimes in only minutes, once even on a sunday.( their time zone). Time will tell on this prop but so far I am impressed with it.
  12. Madhatter

    NEW propeller for CT

    I am experimental. Smooth air today 60ยฐF, 1500 msl, 5200. 114 kts, IAS, 5400. 117kts IAS, 5500 119kts IAS. WOT of 5400 or 5600 will not make these numbers, 5500 is the best. One thing I noticed if the carb sync is off even a small amount you will get a lot of high frequency vibration around 2500 rpm, something that is not as noticable on a Neuform, I am sure is due to low inertia. I have done about 8 test flights and am satisfied with the prop so far.
  13. Madhatter

    NEW propeller for CT

    2000hrs no life limit. Go to their website
  14. Madhatter

    NEW propeller for CT

    This is only my preliminary flight data, the next few weeks will establish a better evaluation. Smooth air would be nice.
  15. Madhatter

    NEW propeller for CT

    Total cost delivered including spinner is 1925 USD. Their website is very detailed including extensive test data, engineering data and installation info.
  16. Madhatter

    NEW propeller for CT

    The prop has leading edge protection and is replaceable. The prop and spinner is already fully balanced at the factory and is color coded for indexing.
  17. Madhatter

    NEW propeller for CT

    Installed my e-prop and completed 4 test flights at different wot rpm's on ctsw. The manufacturer of this prop recommends 5500 rpm wot as the overall best rpm for all flight parameters for the 912. The blades have a much smaller chord than any I have ever seen. I tried 5650, 5600, and 5500 with all variables the same, ( oat, baro, altitude, clean blades, 1/2 fuel, etc ). My original prop was a 3 blade Neuform and was flown just prior to the e-prop for comparison. 5650 and 5600 numbers were ok but the 5500 numbers were much better. Climb rpm now is 5300 at 1300-1400 ft/min, as opposed to 5000 rpm and 1100-1200 ft/min (less load on engine in climb). Cruise at 5400 is 115-116kts, at 5200 I get what I used to with the Neuform at 5400. Takeoff distance is much shorter( less than 6 kts wind today). A major difference for me is much less vibration, I used to get vibration when transitioning from cruise to reduced power settings in a descent until stabilized (I have heard others complain about this). Now I get no vibration. The prop also stops much easier due to being much lighter in weight. In evaluating this prop I tried not to split hairs, even with turbulence today. To me I had obvious performance increases but I am sure others will have to do their own evaluations, pilots and planes are all different.
  18. Madhatter

    batteries again

    Leave your anti collision light switch on, if you forget to turn off the master you will know when you get out of the plane. This works in any aircraft.
  19. Madhatter

    Stabilator bracket crack

    On the cracked bracket, it looks like it was impacting regularly with something on the corner. An indentation is worn into the corner, something maybe to investigate.
  20. Madhatter

    New Floats from MS

    Talked to MS today. They do not intend to change anything on the floats, said there is nothing wrong with them. Am disappointed in the conversation, he was very disrespectful and suggested I get a real mechanic to install them and readjust the float level. Their advertisement said these floats were a " direct replacement ". Adjusting the float arms would not be legal in SLSA. I suppose time will tell how this works out for them.
  21. Only if end fittings can be removed
  22. It is not the webbing , it's the adjusters. They can't be changed without cutting the webbing which means all new harnesses. I had mine rewebbed with new adjusters and they never slip.
  23. Madhatter

    Engine thrust alignment

    Does anyone know if the ctsw cowling is set up for the 2.5 degree offset. I measured the cowling and the left side is 1 3/8 longer than the right.
  24. Madhatter

    Engine thrust alignment

    The lateral dimension yes. The vertical dimension is calculated relative to the line between the wing pins ( I checked with Flight Design USA ). The best I can get is 3.5 degree relative without the spinner looking way out of place, top of spinner about even with the top cowling. Plane fly's great.
  25. Madhatter

    New Floats from MS

    Today I built a bench test setup to evaluate Rotax floats vs MS floats to finally put this issue to rest ( hopefully). I fully immersed a rotax float and a MS float for several hours in ethanol gasoline. I then placed both floats side by side on the test fixture and let stabilize for about an hour. I then adjusted the fuel level to allow a straight edge to cross the container just touching the highest float. I could then measure the distance to the lowest float with a depth micrometer. The MS float was approx 2mm lower than the Rotax float. That is unacceptable. I am sure the Rotax float will absorb a little more fuel over time but not that much. The Rotax float weighed 2.9g and the MS float weighed 3.7g. Apparently the initial info from MS which was that Rotax floats absorbed fuel and that was taken into account, was incorrect. I believe my initial contact with MS was with sales people. This time when I called, today, it was the head of engineering department, Aero Accessories, Marvel Schebler. From the conversation I don't believe he was aware of this issue and he took it seriously, I will probably hear from him later. I am sure this could be a significant financial hit but the optics for the company could be worse. These floats are new and I am sure they will resolve the issue quickly. I think that maybe why everyone is not seeing this problem with the MS floats is the float level might be on the critical edge so some see it and some don't. Issues like this are not unusual in aviation (stuff happens).
×