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facthunter

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Everything posted by facthunter

  1. facthunter
    I reckon that engine would need some ducted air to cool it under a cowl.. Nev
  2. facthunter
    I doubt that is the issue with this one. ALL this extra stuff comes up any time the name BOEING is mentioned. Nev
  3. facthunter
    The ER version has the GE motor and is the Biggest Fan jet (High bypass) engine made to date. Nev
  4. facthunter
    The Triple 7 is not a bad aeroplane and been around for a while. Probably an engine maintenance issue. Nev
  5. facthunter
    Silicon is in sand and glass. It's also sometimes used in aluminium alloys to lower the thermal expansion rate. It makes the alloy harder and more brittle and more dense. I can't recall the word "silicon" used in this discussion prior to now. Nev
  6. facthunter
    Ridicule me and preserve your FACT FREE zone. Less filter area means it will block quicker . I also believe it is good to THINK about things. What's Inside every oil filter? You should have cut many open by now. Wavy treated Paper. Injection requires fine filtration . The filter you're promoting is fine for some applications.. Like I said you can see what's going on. Nev
  7. facthunter
    Skip. Silicone is not the kind of MUCK you want on a spark plug thread. It's weird stuff and is not a CONDUCTOR of heat. ALL these things will alter the tension feel. The washer crushes and you can feel that situation by hand. Heat removal from the spark plug body is not an issue if it's TIGHT. Thread wear could occur in aluminium, particularly with shorter reach plugs or ones that have been out of the Package floating around in a tool box. allowing tread damage and then there's the odd cross threading possibility. Nev
  8. facthunter
    Should be easy to get. They take the signal from a plug lead. No metal contact needed. The Thruster looks good. Nev
  9. facthunter
    Starter brushes are not of ordinary carbon. There's usually copper in them. Check bearings and that the armature is not polling and the commutator is running true.. Nev
  10. facthunter
    These filters don't have the surface area of the other type with the wavy treated paper element. It's done with something to make it waterproof.. You can see what's going on in there though. Nev
  11. facthunter
    Silicone is an INSULATOR of heat and messy to deal with. You can't dissolve it. What purpose is it serving?. It's just another complication to deal with. The Plug washer is really a single use item. It's torqued till it flattens. The longer reach plugs have more of an issue. They can even get tight from oil carboning and require some careful easing and solvents to work them out without damage and to remove the head and heat it.. Aluminium is good at picking up metal when the fit is tight. It needs special lubricants when being machined...Threads in aluminium are often a problem. It's relatively soft and the threads easily shear. Thats why fine threads are not used. Some motors have a cast-in threaded bush for the plugs, made of strong bronze. There are recommended ways of coping with this. You might get away with doing none of it. but why not apply best practice? Prevention is better than cure. Nev.
  12. facthunter
    I now have to have a Rotax to be able to comment?? Get real . It's just another motor and the heat transfer problem doesn't exist in any peculiar way for the Rotax relating to spark plugs. If anything it's probably less of a problem that it is with air-cooled motors. Nev
  13. facthunter
    Full flaps is only for calm conditions and a short (or rough) runway. The advantage of a high drag approach is the Plane stops quickly when you take power off.. Nev
  14. facthunter
    You are trying to fix a problem that does not exist. The sealing washer seals it and conducts heat well and at least 1/2 the thread area is in close contact. It's just another engine after all and they all have spark plugs.. Bits of silicone block small oilways too. I stopped using it as a sealant years ago. Unless parts are scrupulously clean it does not stick. Nev
  15. facthunter
    Silicone is an excellent Heat insulation Material. Look it up. It can stand high temps. Behaves as a non metal. Nev
  16. facthunter
    You are not consistent there when you look for different oils and parts. starters etc. Nev
  17. facthunter
    Helicoils in plug situations are NOT a good fix. they usually leak a bit and can dislodge.. IF you don't use Anti seize and are a licenced Lame you should be sacked. It's standard practice. Advisable on all engines. If it's a fairly oily type of engine you might get away with it.. Anti seize has to be applied sparingly as excess can short the plug out... Nev
  18. facthunter
    As a glider the aggy plane is a different beast. ( I'm having trouble posting , Bear with me.) they are at opposite ends of the L/D spectrum Perform an entirely different function.. Nev
  19. facthunter
    When you climb you gain potential energy which is mass x height.
  20. facthunter
    Another stuck one above. Posted anyhow. With the threads and the washer compressed heat transfer is a NON ISSUE as it's more than adequately coped with. You want PREDICTABLE results. The only plugs that will overheat the entire plug are loose ones. The centre electrode has to get to the right temp to keep carbon from depositing on it and shorting it out.. If it gets too hot the risk of detonation increases on higher output settings. Extended idling will often deposit soot on plugs. (taxiiing) Running on may be a result also but might also be a bit of carbon incandescing. ' I would not be satisfied of the silicone preforming predictably at Higher temps. It's more for electrical situations where a heat sink is needed..Diodes rectifiers regulators etc. It won't conduct electricity. Nev
  21. facthunter
    If the alloy picks up you will completely ruin the thread or break the threaded part off trying to take the plug out. Every aircraft mechanic KNOWS this. Nev
  22. facthunter
    Read what I just posted above. Nev
  23. facthunter
    A properly tensioned spark plug will allow adequate heat transfer. The area of a plug exposed to flame is not large with a 14 mm plug. even better with smaller ones. The point is that it's consistent and if the plug exhibited an overheat of the insulator, internally. (The ONLY bit that matters) you would adjust to a cooler heat range. Nev
  24. facthunter
    Rather popular Plane in their time. Nev
  25. facthunter
    Gliders are much more aerodynamically efficient than most other category of aircraft in the same mass regimes. Need less thrust. Nev
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