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facthunter

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  1. facthunter
    General rule with Leaning (unless operating at a high altitude aerodrome) Don't lean till below 75% Power. Procedure...... Lean till the engine starts to run a bit rough, Correct it (make it smooth) and then richen a little bit. That way you will get the POH consumption figures. Most engines are rich at idle. and can soot plugs which can cause a Mag drop or Power loss. It's permissible to lean on taxi but have a way to ENSURE you go to full rich before take off Power is applied. AVAS has 2 octane ratings like 100/110 The higher one is for a RICH mixture. Nev
  2. facthunter
    Telling people to lean out the mixture to get Power on a 2 stroke is NOT something I would Put my name to. It's a good way to put a Hole in the Piston. That then requires a complete strip down. You May get More revs under Light Loads But IT really is a NO NO for Aircraft or Chainsaws. Nev
  3. facthunter
    I don't DO Facebook. Starters can Break small engines if they flood. My first engine. A FROG 150 Diesel ruined the fingers of Both hands before I mastered it. I didn't KNOW anyone else with engines. I designed and built my Own Control line Plane. IT didn't last very Long either, before it bit the dust. Not easy times. I was about 12. Nev
  4. facthunter
    Before it was converted. Nev
  5. facthunter
    He treated the exams as a Box ticking exercise which in some situations they are.. PLENTY of People recognised there WAS a Problem. HE CHOSE to remain ignorant of Essential Knowledge. Please read my LAST sentence above. Nev
  6. facthunter
    Pilot's like others, Can't KNOW what they DON'T KNOW. Flying is NOT forgiving of Mistakes, Carelessness or LACK of Knowledge. The Rules are written in BLOOD. Heed them. Stall training is Generally woefully Inadequate and in some aspects DANGEROUS. . Nev
  7. facthunter
    Probably the ONLY kind you will get. Hard to land in gusty winds.. Nev
  8. facthunter
    Depending on the Class of the Hold, being left in in one can be fatal.. Nev
  9. facthunter
    Grumman is the Manufacturer. Gulfstream is the Model and they are great stuff,. Nev
  10. facthunter
    Some CADMIUM Plating looked like Brass. Cadmium Plating has been Banned in some Places. Cadmium is dangerous The Alternative in Aviation is Zinc-Nickel. That's been the case for Many years Electroplaters have a hard time with EPA's. MOST have gone out of business. . Zinc gives Galvanic Protection. (sacrificial). But it is soft. Nev
  11. facthunter
    Seems like a LOT of Money. I thought some of the SAAA ones were dear. Nev
  12. facthunter
    The JOKERS are out early today. Nev
  13. facthunter
    No, I was referring to the damaged 747. Nev
  14. facthunter
    There's a Lot of ways of helping them Last Better. Gyros need Lots of Power. Carbon Behind the rings is a Killer. Big end Cages fail and the Hard skin flakes off the Crank Pins and the results of that are Quick and fast. Any Holey Piston Means aluminium all through that Cylinder and case. Nev
  15. facthunter
    The original Book may not be the Best reference, Currently. Nev
  16. facthunter
    BrenDAn, The MOTOR YOU Have had a reputation for breaking Crankshafts near the drive end. Nev
  17. facthunter
    I mentioned earlier that adding oil to fuel increases It's viscosity which makes it flow slower thus Leaning the Mixture/ THAT statement is NOT CORRECT as you point out.. I would suggest that they MEANT Oil Available to the engine. Way Back a Friend of mine riding a Bultaco at Mt Panorama put a foot operated oil pump on his bike to Prevent engine damage down conrod straight. A chain saw should require LOAD to make it fire evenly and it should be rich enough to never scream and do high revs. Nev
  18. facthunter
    Yes I wouldn't suggest over revving that Motor. Nev
  19. facthunter
    IF you were Interested, you'd have queried Blue Adventures Post, over 3 weeks ago.. Maybe. Nev
  20. facthunter
    EVEN fuel Distribution is the Prime method of getting efficiency, Injection is a good way of achieving it. . Nev
  21. facthunter
    Premix at Low or closed throttle does not lubricate the Motor adequately. That's well Understood. Going to full throttle is Not a common set up. Nev
  22. facthunter
    Anyone CAN CLAIM anything. A CV carb would ALWAYS have better atomisation across the RANGE. An oversize Slide Carb would be even worse. Hard to tune and little venturi effect.( suction) That type has NEVER been Known for good economy and there's good reasons for that Inherent in the design. Nev
  23. facthunter
    IF the Mix has less fuel there will be Unused Oxygen and that will try to oxidise other things like exhaust valves and also Burn slower, and less reliably. Ie May spit Back.. Nev
  24. facthunter
    Not a Lot of GOOD 2 strokes are Premix these days. Oil injection is the go. Adding more Oil Makes the fuel more Viscous and the Jetting Has to be altered. It won't compensate for Altitude either. Premix requires to run all the fuel out to prevent Left over oil thickening in the carbs when the Petrol evaporates. Nev
  25. facthunter
    Not radically different to many other slide Carburettors. Mikuni. Amal etc The only way to use less fuel is LEAN it out and that Melts/Burns holes in 2 stroke Pistons. This type of carburettor usually sets the standard for straight out Power with ONE per cylinder The difficulty providing richer Mixture when accelerating. Usually done by a well around the Needle Jet or making a Pumper version on some flat slide designs Parlticularly Snapping open a slide carb can usually Kill the Motor IF done quickly enough. Nev
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