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20th Jan 2021, 21:22
Replies: 15
Views: 2,118
Posted By Vessbot

I'm completely with oggers. To restate from my...

I'm completely with oggers. To restate from my own words, more succinctly, may add some clarity.

We must differentiate between power input vs. power output. Assuming constant RPM (we're within...
Forum: Tech Log
27th Dec 2020, 17:33
Replies: 304
Views: 32,035
Posted By Vessbot

I interpreted it to mean that they were tested...

I interpreted it to mean that they were tested both with and without.

That said, I have seen more than once, "raw data" used as meaning the display of a VOR signal instead of the overlaid RNAV...
Forum: Rotorheads
22nd Dec 2020, 14:38
Replies: 147
Views: 14,457
Posted By Vessbot

Roses are red Violets are blue How far ahead?...

Roses are red
Violets are blue
How far ahead?
By π over 2
Forum: Rotorheads
22nd Dec 2020, 02:46
Replies: 147
Views: 14,457
Posted By Vessbot

I think this is what happens when you have...

I think this is what happens when you have knowledge as a collection of facts, rather than understanding as the inference from particular facts to a general principle, and then application of the...
Forum: Rotorheads
21st Dec 2020, 21:05
Replies: 147
Views: 14,457
Posted By Vessbot

I don't understand. Why would the blades move at...

I don't understand. Why would the blades move at all? They're in a vacuum. There's no lift to cause displacement. Pitch/AOA would have no effect.

Maybe you're talking about my imaginary setup of...
Forum: Rotorheads
21st Dec 2020, 17:51
Replies: 147
Views: 14,457
Posted By Vessbot

Careful you don't mix up two separate steps, when...

Careful you don't mix up two separate steps, when you say "is felt," for the two setups. In both single mass and solid disk, the force applied TO the body is at X. The force applied BY it (after...
Forum: Rotorheads
20th Dec 2020, 19:47
Replies: 147
Views: 14,457
Posted By Vessbot

I disagree with this statement :p We may not...

I disagree with this statement :p We may not agree on the label, but we can bypass the label entirely in talking about the real subject matter: the underlying physics; and agree or disagree on that....
Forum: Rotorheads
20th Dec 2020, 01:44
Replies: 147
Views: 14,457
Posted By Vessbot

[/color]Can you detail what you mean by this...

[/color]Can you detail what you mean by this phrase? Predominant over what? And don't just say "gyroscopic," I know that. But what specifically do you mean by gyroscopic; what is the source of this...
Forum: Rotorheads
19th Dec 2020, 13:48
Replies: 147
Views: 14,457
Posted By Vessbot

Very low rotational speed is only a problem if...

Very low rotational speed is only a problem if there is another force present that will dominate the gyro behavior - such as, on a toy gyro, the toppling torque that any object standing on one point...
Forum: Rotorheads
19th Dec 2020, 00:53
Replies: 147
Views: 14,457
Posted By Vessbot

I... think I solved it. Non-precession...

I... think I solved it.

Non-precession people: are you thinking that we gyro precession proponents are saying that the normal force that accelerates the blade up, is not lift but rather a direct...
Forum: Rotorheads
19th Dec 2020, 00:18
Replies: 147
Views: 14,457
Posted By Vessbot

OK, and it matters how exactly? The gyro forces...

OK, and it matters how exactly? The gyro forces at low decreasing RPM get weaker and weaker in comparison to the constant toppling force, until at some point the latter dominates the former and it...
Forum: Rotorheads
18th Dec 2020, 18:16
Replies: 147
Views: 14,457
Posted By Vessbot

Yes! Yess!! I have to go so I'll be back...

Yes! Yess!!

I have to go so I'll be back later with a normal post, but please ruminate on this for a bit.
Forum: Rotorheads
18th Dec 2020, 18:03
Replies: 147
Views: 14,457
Posted By Vessbot

I'm adamant that the factor that moves the new...

I'm adamant that the factor that moves the new tip path 90 degrees after the input, is the same as the one that does the same thing in gyros. And it seems to be the dominant factor in a rotor, when...
Forum: Rotorheads
18th Dec 2020, 17:47
Replies: 147
Views: 14,457
Posted By Vessbot

Big variance. A flight instrument rotor spins at...

Big variance. A flight instrument rotor spins at 10K to 15K RPM, according to Google. A spacecraft in low Earth orbit is at 1 rotation every 90 minutes. It doesn't matter.



This is not true....
Forum: Rotorheads
17th Dec 2020, 23:40
Replies: 147
Views: 14,457
Posted By Vessbot

It’s true I’m not a helicopter expert, but please...

It’s true I’m not a helicopter expert, but please give me a little more credit than this. Just a few posts ago, I wrote virtually the same thing: “It's constantly transitioning through 1 sinusoidal...
Forum: Rotorheads
17th Dec 2020, 17:33
Replies: 147
Views: 14,457
Posted By Vessbot

Yes! There’s a huge tendency for people to reason...

Yes! There’s a huge tendency for people to reason based on labels and word association, instead of physical behavior. If the explanation for the phenomenon they’re familiar with is label A, and...
Forum: Rotorheads
17th Dec 2020, 08:00
Replies: 147
Views: 14,457
Posted By Vessbot

You cut out and didnít answer the first question,...

You cut out and didnít answer the first question, which was why the rotor is not subject to the forces/behaviors of rotating bodies. Itís only after that, that you can try to substitute some other...
Forum: Rotorheads
17th Dec 2020, 05:28
Replies: 147
Views: 14,457
Posted By Vessbot

Yes, this is true in a rotor. It's constantly...

Yes, this is true in a rotor. It's constantly transitioning through 1 sinusoidal cycle of force per rev, and not instant.

You've been contending that a continuous force is required for the path to...
Forum: Rotorheads
17th Dec 2020, 02:01
Replies: 147
Views: 14,457
Posted By Vessbot

What is the significance of the source of the...

What is the significance of the source of the force? The normal force, no matter its nature, causes a deflection of the path of the object. Whether it comes from lift, or anything else. I don't see...
Forum: Rotorheads
16th Dec 2020, 23:56
Replies: 147
Views: 14,457
Posted By Vessbot

I do, because even with an instant impulse and...

I do, because even with an instant impulse and normal acceleration only at the 0 degree point, with no normal acceleration afterward, in a simple system the max displacement will take 90 degrees...
Forum: Rotorheads
16th Dec 2020, 23:41
Replies: 147
Views: 14,457
Posted By Vessbot

Let's stop right here actually. Like all rotating...

Let's stop right here actually. Like all rotating matter, yes, the bucket constitutes a gyroscope.


Yes, this is gyroscopic precession.

Is it your position that if the weight was very light...
Forum: Rotorheads
16th Dec 2020, 22:08
Replies: 147
Views: 14,457
Posted By Vessbot

I'll agree to that. Fly safe! :8

I'll agree to that. Fly safe! :8
Forum: Rotorheads
16th Dec 2020, 22:05
Replies: 147
Views: 14,457
Posted By Vessbot

I'd bet that if asked to elaborate beyond a...

I'd bet that if asked to elaborate beyond a simple off the cuff one liner, to where some nuance is involved in considering separately multiple simultaneous effects and their relative contributions,...
Forum: Rotorheads
16th Dec 2020, 15:48
Replies: 147
Views: 14,457
Posted By Vessbot

You're arguing that a phenomenon (max...

You're arguing that a phenomenon (max displacement approx. 90 degrees after the force) happens because of a thing (s+ut + 1/2 a t ^2), but I'm pointing out that the same phenomenon happens without...
Forum: Rotorheads
16th Dec 2020, 07:58
Replies: 147
Views: 14,457
Posted By Vessbot

You said it takes time in your last post, I asked...

You said it takes time in your last post, I asked you why it takes time, and you didn't say why, but just repeated that it takes time again. (You also ignored where I explained why.)

If you're...
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