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HeliTorque :: View topic - Gyroscopic Precession
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HeliTorque Forum Index » Flight Dynamics

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Heliwhore
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PostPosted: Tue Feb 17, 2009 9:43 pm    Post subject: Reply with quote

Ah ok, 206, now we are starting to gain some rigidity, that I accept.
I'm still having problems with being able to precess through 90 degrees to a blade that doesn't exist at the time the force is applied.

And talking of definitions, 90 deg precession is a fundamental one.
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animalsticks
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PostPosted: Thu Feb 19, 2009 1:38 pm    Post subject: Reply with quote

ok 206, wheel spinning, gimbals hinge, torque, atom path, straight line, move cyclic or aerodynamics around disc, rigid between blade one and two,

ok do we think as a disc or maybe as the blade moves so quick that when force effects blade one blade two is already in a position to be effected,
ok in no air, no resistance or aerodynamics, what happens then? do we see the effects of GP as there are no aerodynamic forces to deal with...


Any one got a large pressure chamber i can borrow for a personal experiment?
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Heliwhore
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PostPosted: Thu Feb 19, 2009 7:12 pm    Post subject: Reply with quote

Animal, I'm a fairly lateral thinkin guy most of the time, but WOW, you way lost me through that one....... Shocked
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PostPosted: Fri Feb 20, 2009 11:10 am    Post subject: Reply with quote

If, as Wheliwhore said,
Quote:
And talking of definitions, 90 deg precession is a fundamental one.
then any blade that doesn't have a 90 degree phase lag is obviously not affected by GP. There are plenty around with non-90 phase lags.

So, if GP is selective in the helicopters it affects, the whole theory is blown out of the water.

GP is just a means of explaining phase lag, it is not the root cause.
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Heliwhore
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PostPosted: Fri Feb 20, 2009 11:18 am    Post subject: Reply with quote

Well, there of course is another point of discuusion I suppose.

Are we implying that having an advance angle of anything other than 90 degrees means that phase lag is happening at someting other than 90 degrees. OR are the manufacturers just compensating for certain flight characteristics of their aircraft by having the disk tilt somewhere other than directly forward?
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PostPosted: Sun Feb 22, 2009 10:00 am    Post subject: Health warning Reply with quote

Building motorised gyroscopes with offset flapping hinges can be dangerous.

Make sure you use bits that can take the stress of high rpm, if not you spend quite some time looking for the bits that come off they really do make a lot of noise when they do.

If you are dumb enough to try it, make sure that when the bits fly off you turn off the power to the rest of it or it will beat itself to pieces.

Back to the drawing board.
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Heliwhore
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PostPosted: Sun Feb 22, 2009 10:30 am    Post subject: Reply with quote

PMSL Veeany Buzzsaw

I would like to have seen video of that, on a serious note however, good advice........
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WhirlyGirl
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PostPosted: Sun Feb 22, 2009 5:32 pm    Post subject: Reply with quote

Video evidence of said exploding gyroscope even can be seen here:

http://www.veeanysexplodinggyro.com

Rolling Eyes

Sarah
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veeany
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PostPosted: Sun Feb 22, 2009 8:16 pm    Post subject: Reply with quote

Which I read at first as

Veeany Sex Plodding Gyro
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Jen
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PostPosted: Sun Feb 22, 2009 8:35 pm    Post subject: Reply with quote

Me too. What is that exactly? Shocked
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PostPosted: Sun Feb 22, 2009 8:49 pm    Post subject: Reply with quote

Duh Shocked

Should have read that though before I posted it... Embarassed just wanted to see how many got sucked in an clicked on it!!!

[hijack]

On that note (slightly changing subject - sorry) some companies should really read their web addresses before they launch their sites...

Who Represents
www.whorepresents.com

Experts Exchange
www.expertsexchange.com

Pen Island
www.penisland.net

Therapist Finder
www.therapistfinder.com

Powergen Italia
www.powergenitalia.com

Mole Station Nursery
www.molestationnursery.com

Web One
www.webone.com.au

Pots of Art
www.potsofart.com

Teachers Talk
www.teacherstalk.co.uk

Access Therapist
www.accesstherapist.com

Go Tahoe
www.gotahoe.com

Dollars Exchange
www.dollarsexchange.com

[/hijack]

Laughing ROFL Laughing

Sarah
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veeany
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PostPosted: Sun Feb 22, 2009 9:02 pm    Post subject: Reply with quote

I forgive you for stealing my thread hijacking crown.

Quality !
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James T Lowe
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PostPosted: Sun Feb 22, 2009 9:07 pm    Post subject: Reply with quote

Squawking 7500.

www.expertsexchange.com is a terrific site. I use it all the time.

Honest...... Very Happy

Or maybe I shouldn't admit that. Embarassed

(Actually, it is www.experts-exchange.com...)
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Last edited by James T Lowe on Sun Feb 22, 2009 9:11 pm; edited 1 time in total
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PostPosted: Sun Feb 22, 2009 9:10 pm    Post subject: Reply with quote

Thank you... now what were we talking about before the whores, rapists, stalkers and hoes rudely interrupted us?

Laughing

Sarah
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PostPosted: Sun Feb 22, 2009 9:11 pm    Post subject: Reply with quote

dammit...I keep clicking on these Embarassed Laughing
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