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facthunter

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Everything posted by facthunter

  1. facthunter
    That would be a pretty good way of restructuring the argument just because YOU don't like it. IF You haven't NOTICED ... up till now. I've consistently said "DO WHAT THE MAKER ADVISES".. There's confusion here about Silicone, silicon and silica. Some of the silicone sealants I use go hard in the tube before I finish them.. How do you clean the thread of the remains of the old sealant? What solvent would you use? any remaining grunge would maybe keep the thread from having the optimum contact and also negate the validity of the torquing figure.. There's a big risk of the wrong product being used. ."This one has silicon in it and should do it." as I don't have the brand you asked for. Hence the possibility of the unknown variable creeping in. Murphy's Law. .Nev
  2. facthunter
    You are inconsistent. You argue about Rotax's oils being too expensive and infer they are ripping you off.. With this you say just use it anyhow. with a silicon(e) paste product. A metalised anti seize may conduct heat better than where Silicon doesn't allow such a good contact. One side of all the threads has excellent contact with the head metal when it's tightened and if it's all clean and the sealing washer collapsed properly. I suggest 144 inch Lbs may not be sufficient to reliably achieve that. You can feel it when done by hand if you know what you are doing.. Hey JUST show me ONE cooked plug or tell me what they look like and cause to happen . Nev
  3. facthunter
    Auto electricians should still supply it. Nev
  4. facthunter
    I want evidence of the NEED for it. Isn't that reasonable?. I'm also an atheist for a similar reason. Evidence. Nev
  5. facthunter
    OK Hands up who has ever had a cooked spark plug in a 9xx motor.? . Don't tell me everyone uses wacker or something. Where are the examples?. Nev
  6. facthunter
    I've explained it fully all the way through. Rotax do suggest a few funny things at times. It's NOT blasphemy to question it. Plug heat transfer is NOT an issue. Silicone is not good at transferring heat. I do have a long and extensive experience with many kinds of Motors. Not just U tube. WHY BOG up threads with silicone? It's extremely difficult to clean off. It has VARYING outcomes. . Expensive and NOT necessary. On electrical sinks it holds the two pieces together in close proximity. You don't create a thick blob. Nev .
  7. facthunter
    ALL those types of U/C have trouble with the amount leverage of the Brake force on the U/C leg. .. It's part of the deal. They are made to fly in the air. Nev
  8. facthunter
    I see said the blind man. Thanks.. Brakes that work well. Not Clevelands are they? Nev
  9. facthunter
    Wouldn't a hard rubber limit stop do it better? Most other suspensions have one. Nev
  10. facthunter
    Thanks Bob. The cage would have to contain them or the end float very controlled. Nev
  11. facthunter
    Noisy radios have been with us a long time. Shielded lead and plugs fixed it early on R Plugs and carbon leads are a no no with Magneto's. The higher resistance makes the Coils short out internally. High altitude operations requires Coils mounted near the plug and the HT section pressurised. Nev
  12. facthunter
    What stops the rollers falling out? and crud getting in? Nev
  13. facthunter
    Makes no sense from that drawing. It's either thrust or AXIAL. If it had balls it could do both. No funny comments thanx. Nev
  14. facthunter
    Yes I should give up rather than try to get you to understand. The post above was in response to yours . . Nev
  15. facthunter
    Pretty high stall speed. Nev
  16. facthunter
    Parallel rollers are not geometrically correct for thrust applications. Make sure it has a bit of good grease there. Check none are missing. Nev
  17. facthunter
    It's dead easy to google these things and find out. We should be able to discuss things like this sensibly. Jokes belong in the other section. Nev
  18. facthunter
    V twins have an advantage in pistons flywheel effect. There is never more than ONE piston stopped at the same time. There's an optimum angle . It's about 67 degrees. That motor has a flywheel. If it's going to keep it, it should be the same end as the drive is taken from.. Nev
  19. facthunter
    The cheap Bosch are cheapened right off. I would think the Hitachi etc are best , maybe Reaming a sintered bush seals it over more burnishing it than anything else. You might be able to do it with a diamond tipped small end boring machine if you could hold it. I found the Delco Remy alright and some RR cars used it after the war.. The engagement on Autolite (ford) was cruder mechanically and some of it wasn't made to be fixed easily. (Shades of every thing today). New and swap over a cap is the way to go unless you have an A model Ford that you can get everything for new. these days I've developed an appreciation of the model T I never had in the early days. Nev
  20. facthunter
    The bushes are sintered bronze self lubing and cannot be reamed to size satisfactorily. Much play and they will pole the armature to the field pieces and also reduce contact effectiveness of brushes with the commutator. I see I'm overlapping with danny. Check the spring tension of the brushes, (you can usually adjust it), as well as the contact area Short brushes may move in the holders too much for good contact. Nev
  21. facthunter
    Hasn't got a lot of wing but most of it is blown by the propwash. They haven't bothered to contra rotate the Props either. Nev
  22. facthunter
    If you haven't noticed I use facts all the time, annoying as it might be to some. I don't believe in wasting time fixing non existent problems. Rotax is made by humans not DOG. Some of the things they come out with deserve examination because they border on weird. . It's not that they are cheap either. Look at the amount of time spent over Rotax Minutiae on this forum. IF all that is necessary to operate a little plane engine something is wrong because most people won't do it in any case.. (Next you'll say they last very well anyhow) and I think that would also make my point. I've done plenty of hours behind 9xx Motors that I had no control of how they were serviced. People manage to make them rough running in mid range and have cooling and fuel use problems too.. NO engine is perfect, especially the ones with pistons in them. Nev
  23. facthunter
    Rather SLOW. Nev
  24. facthunter
    Not sure. Anyhow you are onto it. Nev
  25. facthunter

    Saab J 21R

    facthunter commented on red750's aircraft in Warbirds

    Same engine as the DH Vampire. Pretty low thrust.. Large dia Centrifugal compressor. . Nev
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