As with any craft the center of gravity shifts with speed.
When you accelerate it's thrown back, when you brake it shifts forward.
Even though I used calculations and a pipe to balance the craft, this balance is at static hover, not at speed.
I added too much weight in the back, but how do I determine the center of weight/gravity at speed?
Let's say you have a body in motion, a car, an airplane or hovercraft - does not matter, looking for basic laws of physics here.
1. You know the weight.
2. You know the center of gravity at rest.
3. You know the center of lift (if applicable).
Let's say our object weighs in at 600 lbs.
Lets say our object is going 30 mph.
Q1:
How much does the center of gravity or weight shift back?
Q2:
Lets say I need to start or stop very quickly, how do I calculate the location shift of CG backwards and forwards?
I think the key is taking the the actual weight and turning it into mass, then take into account speed the horizontal force, which in turn may reduce the gravity force or weight over a given time peroid.
An actual example would help, then I can apply it to my situation.
EDIT.............................................. .........................
Perhaps I've tried to find a universal solution that just does not apply.
Example of what I meant.
Weight Transfer-1
http://www.msgroup.org/TIP074.html
Quote:
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When you change speed (accelerate or decelerate) the weight of your motorcycle (including you) shifts in such a way as to put more or less load on your tires. You do not have to weigh the load on your tires to know this with certainty because you can see it happen by observing your front-end 'dive' when you brake.
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Stern/rear hovercraft skirt drag might be a version of
torque or braking power applied.
1. Car/Motorcyle; weight and center of gravity stay the same unless braking torque is applied or aerodynamic forces have an influenence.
2. Boat; weight and center of gravity are the same until displacement mode is replaced by planing mode, then there is a shift to the "center of lift". This is countered by tabs at the rear which induce drag counterforces and angle changes.
3. Airplane; weight and center of gravity are the same until speed increases lift on the wings causing a shift which is countered by the elevator (typically at the back).
4. Hovercraft; once it's over the "hump speed" which is also a boat term with a slightly diffenerent context, it is in level flight. Weight is centered until torque (paracitic skirt drag) is encountered in the form of wave impact and aerodynamic resistance.