How Important Is Crashworthiness?
HC/VL,
I do not wish to divert this thread (it's too interesting to lose) but does HC's theory on the absorption of vibration work in the same way in the ANR - where does all that noise go?
Jim
I do not wish to divert this thread (it's too interesting to lose) but does HC's theory on the absorption of vibration work in the same way in the ANR - where does all that noise go?
Jim
JimL
According to my theory, the energy released by the collision of the external sound waves an the waves generated by the ANR system goes to heating up the medium in which they are propagating. This was the structure in the case of the anti-vibe, and is the air in the case of ANR. However in the case of the sound (already having been attenuated by the passive sound absorbtion) the amounts of energy are tiny and I am sure could not practically be detected.
HC
According to my theory, the energy released by the collision of the external sound waves an the waves generated by the ANR system goes to heating up the medium in which they are propagating. This was the structure in the case of the anti-vibe, and is the air in the case of ANR. However in the case of the sound (already having been attenuated by the passive sound absorbtion) the amounts of energy are tiny and I am sure could not practically be detected.
HC
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Complaints
HeliComparator has the logic on his side, when he talks about 'crashworthyness' being a subset of 'safety'.
Aren't, crashworthy seats, vibration dampening systems, and active noise reduction systems, used as Band-Aids to cover-up the actual problems. Could it be that by masking the problems from the pilots, they will complain less?
Of course, fewer complaints will reduce the pressure on the manufacturers to tackle the actual underlying problems. Those very problems that compromise the safety of rotorcraft.
_____________
A person who knows Diddly Squat mentioned that Diddly recommended the rotor as a good place to start.
Aren't, crashworthy seats, vibration dampening systems, and active noise reduction systems, used as Band-Aids to cover-up the actual problems. Could it be that by masking the problems from the pilots, they will complain less?
Of course, fewer complaints will reduce the pressure on the manufacturers to tackle the actual underlying problems. Those very problems that compromise the safety of rotorcraft.
_____________
A person who knows Diddly Squat mentioned that Diddly recommended the rotor as a good place to start.
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Dave,
The concepts you mention are part of balanced designs. All helos will be crashed (except for helicompariotor, who flies like God and thus needs only comfort, by his own assertions.) Thus the aircraft is made to protect its occupants. If you consider those traits "band aids" then you will never really make a helo someone else will buy, and you surely will never make one that the FAA allows you to sell!
Would you rather your daughter rode in a car with airbags, belts and anti-lock brakes, or not? It could be that even helicomparitor drives a car with safety features, as long as its made in France.
The concepts you mention are part of balanced designs. All helos will be crashed (except for helicompariotor, who flies like God and thus needs only comfort, by his own assertions.) Thus the aircraft is made to protect its occupants. If you consider those traits "band aids" then you will never really make a helo someone else will buy, and you surely will never make one that the FAA allows you to sell!
Would you rather your daughter rode in a car with airbags, belts and anti-lock brakes, or not? It could be that even helicomparitor drives a car with safety features, as long as its made in France.
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Bonjour Nick,
Je ne vous comprends pas.
Opps!! Bad example. My car doesn't have airbags, or anti-lock brakes and the driver's seat-belt doesn't work. However, it has been very safe transportation for every one of the 23 years that I've owned it. It's a Porsche 928, and as long as it remains reliable, it will be kept.
P.S. I don't have a daughter, ~ to speak of.
Merci,
Dave
Je ne vous comprends pas.
Would you rather your daughter rode in a car with airbags, belts and anti-lock brakes, or not?
P.S. I don't have a daughter, ~ to speak of.
Merci,
Dave
Last edited by Dave_Jackson; 14th Apr 2005 at 23:55.
A correction to my last but one post if I may, as I hate to have posted inaccurately:
The SEMAs only operate on the cyclic channels, therefore when I said "fully coupled ILS" it should have been "coupled ils" ie you have to set the collective at a sensible position (hopefully the pedals will be in about the right position to keep the ball in the middle so no need to move them).
HC
The SEMAs only operate on the cyclic channels, therefore when I said "fully coupled ILS" it should have been "coupled ils" ie you have to set the collective at a sensible position (hopefully the pedals will be in about the right position to keep the ball in the middle so no need to move them).
HC
