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WaspAir
WaspAir
Supreme Allied Gyro CFI
Last Activity: 10-09-2018, 01:28 PM
Joined: 10-21-2006
Location: San Jose, CA
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  • WaspAir
    replied to Flying jeep
    Yeah, you just need a flying ten ton truck to tow it!
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  • WaspAir
    replied to Some wind and decision making lessons.
    We certainly part company on this one. We're talking about two different legs/flights; one inbound, one outbound. Landing at the end of one leg never imposes an obligation to depart in the same (or worse) conditions for the second. I strongly suggest that there is little danger in sitting on the...
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  • WaspAir
    replied to Calidus Instructor Pack
    I'm not quibbling. It is not a matter of opinion. It is a factual matter, and I fully admit that I don't know the facts. I also assert that you don't, either.

    Your refusal to take "I don't know" as a complete and valid answer (perhaps the one that reflects the most wisdom)...
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  • WaspAir
    replied to Calidus Instructor Pack
    You're obviously not reading. My answer was clear and explicit

    What troubles me is that you seem to think that somehow you really do know, unequivocally, the sequence of events for a far-away incident, for which the official explanation is full of fantasy.
    Some of us don't have access...
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  • WaspAir
    replied to Calidus Instructor Pack
    You're not going to convince people by declaring gross inconsistencies in the "probable" cause as merely "not material".

    Let me begin by saying I don't know what happened, but I do know that the investigator was utterly clueless about the way in which the rotor system...
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  • WaspAir
    replied to Rotor blade flexing video
    No argument there! By the way, the CH-37 had a 72 foot diameter rotor, so that's one really big blade you're seeing.

    The pair of twin-row radials means 36 cylinders driving it, with over 4000 hp from 90 liters displacement. I'd bet the whole gas tank on my Bell wouldn't be enough to warm...
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    Last edited by WaspAir; 09-27-2018, 07:51 AM.

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  • Garmin is offering low prices temporarily; I just got a GTX 335 for my Bell helicopter that slides into the old transponder panel space, is a complete ADS-B out/ transponder solution, and is under $3000 with WAAS antenna at most retailers (check Gulf Coast or Pacific Avionics, for example).
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  • WaspAir
    commented on a Visitor Message From Vance
    Howdy, Vance - no worries!
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  • WaspAir
    replied to Rotor blade flexing video
    Here's a more modern clip that lets you see some hinge motion if you look closely.
    https://www.youtube.com/watch?v=FlP7zSBcbuI...
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  • WaspAir
    replied to Rotor blade flexing video
    P.S. Note that the flexing is cyclic, that is, distortion repeats with blade position in each rotation (look at the condition as it passes the tail rotor each time and you'll see what I mean). These look to me like air load responses, not reaction to engine torque pulses. Forces on the blade vary...
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  • WaspAir
    replied to Rotor blade flexing video
    It is not from a BO-105. It is much older, and quite famous, done with a Sikorsky S-56 / CH-37 Mojave, and the link shows just a short clip from a much longer film..
    The BO-105 has a large titanium rotor head and blade materials that absorb the flexing that would ordinarily go into hinges, but...
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    Last edited by WaspAir; 09-25-2018, 09:46 AM.

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  • Vance
    Vance posted a Visitor Message for WaspAir
    Oops, I did not intend for it to be a message.
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  • WaspAir
    replied to When is a rotor too large for the ship?
    For the benefit of the newbies here --
    some L/D numbers have been cited above. DO NOT assume that you will achieve those values as a glide ratio in your gyro in the event of an engine failure. Plan for something considerably steeper.

    Underestimating a glide ratio is usually not...
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  • WaspAir
    replied to worlds fastest turboprop aircraft
    Hinton's P-51 Voodoo has done passes at more than 550mph with a single piston engine, so that turboprop still has more to master.

    Some claims for aircraft performance can have really strange answers. For example, with no engine at all, the Perlan project glider recently went to 74,298...
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  • WaspAir
    replied to When is a rotor too large for the ship?
    I have often flown an Air & Space 18A solo in steady cruise flight at 220-230 rpm, but with a 35 foot diameter rotor the tip speed is still above 400 feet per second,. It doesn't present safety or handling problems but does limit top speed. With a passenger on board the rpm goes up and so does...
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