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Thank you.

Thats what i thought but still couldn't figure it out as if one part of the planetary gear turns the rest of it does. With this in mind surely the locked MG2 would stop the engine from turning?

if you don't mind me adding to this - putting all the previous points raised aside I don't see what is stopping a conventional CVT from having toothed cones..........there would be wear but I am sure this could be overcome, maybe even not too different to what they already ecounter.......that...

how does the Prius drivetrain allow the engine to start while not allowing the wheels to turn? As far as I am aware the engine is constantly engaged to the wheels via a planetary gear so how does it do this? Much obliged!

IIRC the electronics failed and the pilot had to steer vertical ......got there in the end! more to the original question it would seem difficult without a 'motor' to slow a craft down enough to prevent burn up inthe atmosphere unless they are prepared to circle the earth a few times to allow...

sounds like an ok trick to me.........i'd be interested, its not such a bad idea. what do you mean by 'needed a "performance" profile to equal?'

thanks - i was about to make a correction and ask if the system would work on re-entry such as was found on the apollo missions? I'm guessing it wouldn't as the spaceship would be coming to earth at a terrific speed so might need to fire an engine to slow their approach..............as far as i...

would the 'feather' system found on spaceship one work on a 'full' re-entry (like the shuttle) or does it only work if they are in partial atmosphere (i.e. they need to be in the atmosphere to whatever degree for it to work)?

i guess i'm looking more at the road car than performance racing! but its all related really! i thought it might be possible too but thought i'd see what others thought or had experienced. changing/altering the springs is a bit easier then redesigning the valve train.

thanks BrianPetersen! much obliged! i'll be honest and say i was thinking of efficiency & economy. i'm servicing a cylinder head and doing some further research. Ideally I would like to be able to crank it with my hand but there are many things in my way! it is ture that alot is given back...

thanks. what about a change of materials? is spring stiffness reduction achieved by having less windings? if i used the same material but a smaller wire diameter would i have less tensile strength but also need lees energy to push the spring down?

What scope is there to making custom valve springs that retain the factory Tensile strength but lower the energy needed to push the spring down? Is this a bit of an oxymoron?

thanks! What i'm building is a loop with a heat source at the bottom. At the top and horizontal is an inverted siphon. I can see that regular hydraulics will work but in terms of buoyancy i am not too sure. the rising heat will stop at the inverted siphon as it is of greater bouyancy & less...

I'm currently making something which is convection water cooled.............the problem is i need to make an air trap so the air and water in the system separate. I have come up with something that looks like an inverted siphon - this is good for water but I am worried about the convection...