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At the risk of asking a stupid question - why not?
After all, the unit has no sense of position just level - am I correct?
After all, the unit has no sense of position just level - am I correct?
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Water is 10 times more dense then air.
They will not work properly due to that fact.
They are not properly feedbacked to control in water.
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Stupid question.
gyro's and other such acceleration sensing devices are not equipped to see or work out a displacement from the gravity line. Angle keepers do.
A rate gyro would not know it's position if you held up a diagram to it. 'Level' IS a position, usually at right angles to the gravity line.Who is John Galt?Comment
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Nope.
A rate gyro simply can't 'see' the gravity line, not equipped to do so. But, the sensing element (often a HAL effect chip and related magnet) and related feed-back circuity in most of the old rate gyros proved excellent items within the r/c submarine if you substituted the gyro unit for a pendulum weight -- something Skip Asay came up with decades ago, and many of us emulated, before the advent of a dedicated angle-keeper (the first one's in the States offered, again, by Skip Asay).
I have spoken, so let it be written!
David,Who is John Galt?Comment
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Thankyou wise one - Humble Humble Humble!!!Comment
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Originally Posted by junglelord
Water is 10 times more dense then air.
They will not work properly due to that fact.
They are not properly feedbacked to control in water.
Well I had just read a thread last week somewhere that claimed the density of water being a problem vs air density and feedback loops....thanks for clearing that up.
Yet I am not clear...I have two heli gyros...can I use them in my SeaWolf by Robbe? How do you replace the gyro with the pendulum?Last edited by junglelord; 03-17-2009, 03:40 PM.Comment
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Last edited by toppack; 03-17-2009, 03:56 PM.Rick L.
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* Asking Questions is a 'Good Thing',
Since Learning is Always a 'Good Thing' *Comment
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This was the thread I had read last week. I have two helicopter gyros. I look forward to my APC/ADFFYI, gyros built for helicopters were too sensitive to act correctly on submarines (water is 35 times denser than air). most of the attempts at using gyros employed some method of de-sensitizing the gyro. All of the attempts I know of re-working a gyro pre-date the newer heading-hold gyros, which may have a better chance of working w/o mods, but with the cost of most GOOD heading-hold gyros being over $100, it is cheaper to just buy an APC.
A gyro is meant to detect accelleration, not horizontal level like an APC. APC level control and gyro's are completely different things.
my advice on the pitch controller is not a specific brand, but a type: buy one of the latest generation solid state accelerometer based models. some of the earlier models had a limited lifespan because they either used a liquid or a gas in their sensor, and the liquid or gas would evaporate over a few years time.
caswell sells a model that also includes a failsafe system, for $79.00. the failsafe will empty the ballast tank if the receiver loses signal, forcing a submerged sub to surface.
With my brain injury I had total lose of function...saying water was only 10% as dense as air...that was DENSE!
35% that makes more sense. LOL
So is this correct information Mr Merriman?
Thanks for your brainware....shareware.Last edited by junglelord; 03-17-2009, 05:58 PM.Comment
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I will Stick with dedicated Sub levellers, but at least now I know, thanks guys for the input.Comment
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