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10-25-2007
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#11 (permalink)
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Explaining
Location:
Kelowna, BC, Canada
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Re: Team Tuttle Park Rover
If the motor fails by seizing then I can see that.
if the motor fails because of an open coil then it would be best to have 4 wheels powered by separate motors.
If say the front right fails, you can shut down the front left and just use the 2 rear motors to travel.
It does give you some form of redundancy, but at the cost of a greater likelihood of failure (4 motors).
A decision like this would likely be influenced by our estimated MTBF under full lunar conditions.
If the estimated MTBF is high then our greater concern will be getting stuck
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Thank goodness science is based on "survival of the fittest" rather than being a Democracy!
Buffy
Evolution is a hoot if you are one of the survivors.
UncleAl
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11-05-2007
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#12 (permalink)
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Doing the Impossible
Location:
Madison, OH (when not in fantasy land)
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Re: Team Tuttle Park Rover
Quote:
Originally Posted by Kayra
If the motor fails by seizing then I can see that.
if the motor fails because of an open coil then it would be best to have 4 wheels powered by separate motors.
If say the front right fails, you can shut down the front left and just use the 2 rear motors to travel.
It does give you some form of redundancy, but at the cost of a greater likelihood of failure (4 motors).
A decision like this would likely be influenced by our estimated MTBF under full lunar conditions.
If the estimated MTBF is high then our greater concern will be getting stuck
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Is this more like it? (Close to my original vision...)
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11-05-2007
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#13 (permalink)
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Explaining
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Kelowna, BC, Canada
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Re: Team Tuttle Park Rover
Nice.
What is the scale on that?
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Thank goodness science is based on "survival of the fittest" rather than being a Democracy!
Buffy
Evolution is a hoot if you are one of the survivors.
UncleAl
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11-05-2007
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#14 (permalink)
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Doing the Impossible
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Madison, OH (when not in fantasy land)
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Re: Team Tuttle Park Rover
Quote:
Originally Posted by Kayra
Nice.
What is the scale on that?
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Not sure. I just discovered the world of "RC Rock Crawlers". This is exactly the genre we are looking for. 4WD, articulating bodies to keep the feet on the ground. They can move through very extreme environments. If we are not positive that we will land on a flat open plain then we need to be sure we can still get around. I would want to have a wider base than most of these, as I want to prevent rolling, where they don't mind it so much in this sport.
I found a decent kit that is 1/10 scale which would give me the chassis, motors, wheels, etc. What I don't know is how well some of the shock absorbers and springs would function on the moon. I also want fenders to prevent flinging dust all over the place - they mention this quite often in the write ups about the lunar rovers used for Apollo.
I want 1/10 scale at a minimum, but I would prefer to find 1/6, I think.
Bill
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aka TheBigDog - Hypography Full Freaking Moderator
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The truth is incontravertible; malice may attack it, ignorance may deride it, but in the end there it is. - Winston Churchill
TheBigDog's recommended reading: The Science of Success - Charles G. Koch
A neutron goes into a bar and asks the bartender, "How much for a beer?"
The bartender replies, "For you, no charge." |
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11-17-2007
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#15 (permalink)
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Doing the Impossible
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Madison, OH (when not in fantasy land)
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Re: Team Tuttle Park Rover
John and I just came home with an E-Maxx. We are going to use it as the base for our prototyping and experimentation. Pictures to follow.
Bill
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aka TheBigDog - Hypography Full Freaking Moderator
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The truth is incontravertible; malice may attack it, ignorance may deride it, but in the end there it is. - Winston Churchill
TheBigDog's recommended reading: The Science of Success - Charles G. Koch
A neutron goes into a bar and asks the bartender, "How much for a beer?"
The bartender replies, "For you, no charge." |
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06-21-2009
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#16 (permalink)
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Doing the Impossible
Location:
Madison, OH (when not in fantasy land)
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Re: Team Tuttle Park Rover
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aka TheBigDog - Hypography Full Freaking Moderator
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The truth is incontravertible; malice may attack it, ignorance may deride it, but in the end there it is. - Winston Churchill
TheBigDog's recommended reading: The Science of Success - Charles G. Koch
A neutron goes into a bar and asks the bartender, "How much for a beer?"
The bartender replies, "For you, no charge." |
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06-21-2009
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#17 (permalink)
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Hypographer
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Re: Team Tuttle Park Rover
 So is it a success or not? Was it worth all the hard work? Will you share some of the $1 bln profit with us?
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06-21-2009
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#18 (permalink)
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Ancora Imparo
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Re: Team Tuttle Park Rover
Cool but I didnt see the camera break!?
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06-22-2009
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#19 (permalink)
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M.C. Grillmeister
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Re: Team Tuttle Park Rover
Wow, the moon looks quite different than I imagined!
What is its IP address? 
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"We must not forget that when radium was discovered no one knew that it would prove useful in hospitals. The work was one of pure science. And this is a proof that scientific work must not be considered from the point of view of the direct usefulness of it." - Marie Curie
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