Re: Armadillo 4/18

Yes, rate of turn could be quick.
    Is there is an overall term used to measure a closed loop control 
system's reaction time? That is clock speed, sample rates, valve 
opening, slop etc. expressed as one value?  Perhaps a go or no go type 
of answer with a fuzzy border.
    Just a gut feeling says you should have bolt on "training wheels" 
till this child gets more mature. Perhaps a bolt on thruster pack on the 
nose with a separate controll, say kick in at 10 degrees and shut down at 5?

John Carmack wrote:

> At 11:54 AM 4/19/2004 -0400, you wrote:
>
>> When the rocket tips over at what point will it be unrecoverable? 
>> That is using just main engine thrust steering with no thrusters for 
>> just steering. Thrust can't go negative and can only go so high. Have 
>> you modeled this?
>
>
> If everything is operating properly, it is only unrecoverable if the 
> cg moves outside the polygon enclosing the centers of the engines, or 
> if the propellant sloshes enough to uncover the feed inlet, starving 
> the engines.  Theoretically, it can fly upside down and sideways, as 
> long as it is accelerating enough to keep the propellant going to the 
> engines.  However, if it hasn't been able to catch whatever was wrong 
> by the time it gets 20 degree away from the desired position, it 
> probably isn't going to,  because the control parameters are probably 
> wrong.
>
> John Carmack
>
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........ Alex Fraser  N3DER .........
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