xxChrisxx wrote:Interesting little set up that.

Are all drag cars manuals? I thought they had a viscous clutch/ torque converter set to hook up at just right point for peak acceleration.

depends on the class and car. Top fuel is a direct drive with only a clutch. They are to fast and powerful for a human to shift and keep the tires. The lenco has been around for a long time. at least the 70s.

A wise man once said the only reason we have a transmission is because we haven't built a good enough engine.

With an electric motor its possible to not use any transmission

autogyro wrote:I will just say that in direct top gear seventh, my seven speed stepped gearbox is supported at one end by the crank shaft which is driving that one shaft. Non of the gearsets in the gearbox are moving relative to one another, non of them are creating oil drag and the output is supported on one bearing. This is as good as damit the most efficient transfer of torque from the engine to the gearbox output yet available.

I can't see that this answers my question. To be honest I don't see the sense in trying to sell a design if you cannot show the potential benefits in numbers. Until there are numbers that show a worthwhile benefit in the things that matter (laptime, saved weight, saved fuel, lower manufacturing cost - any/all of these etc.) it doesn't matter a tiny bit how it works or even whether it works.

It's only the benefit that matters. What happens to the vehicle AFTER you fit your 'box.

And you are still hijacking threads talking about you cube when people actually want to stay on topic.

A subject that has gone from really interesting to frankly annoying....

flynfrog wrote:A wise man once said the only reason we have a transmission is because we haven't built a good enough engine.

With an electric motor its possible to not use any transmission

It is possible to use an electric motor on a vehicle with a 'one' speed gearbox.
There still has to be an rpm drop, so there is a transmission as always. Ok it is also possible to use direct shaft drive but even then there has to be allowance for suspension/steering and in any case the motor will still probably have to be ratio matched. Unsprung weight is also a major factor.
However, the motor can be made more efficient by using a variation in output rpm.
The Tesla was designed with a three speed gearbox and this has been kept out of the huge marketing hype, because they could only get it to last 2000 miles. It now has a one speed gearbox.
The comparison between a one speed electric vehicle and a one speed dragster is useful as both can be much improved using a transmission, there is of course proof of this in the dragster development over the years.
So yes but no coconut.

You've still not answered my question.

xxChrisxx wrote:

F1_eng wrote:These are standard simple questions which you won't answer. They won't give any big secrets away about your "design."
Or in a separate case, tell me about the casing and how it houses the gears. I find the size of the unit you describe and the magnitude of the forces I know about impossible.

Its a load of crap, I give-up after this unless you give more info.

Sell the idea to someone, there are thousands of us 10x smarter than you with the best equipment in the world and it's still very very difficult to make significant developments.

But that would totally give the game away wouldnt it. It's easy to plug hopes and aspirations, a bit more difficult when you are nailed down to specifics.

Very true but of course but there is little problem in defining a mind set for someone who has no idea how the system works and yet states that there are thousand more clever than me, without any idea of my abilities.

Sorry ten times smarter, wrong maths.

Just answer the following. It's a very simple question.

Why is your gearbox more efficient than a conventional gearbox, in COLD HARD FACTS AND FIGURES?

n.b. This means I and many others want a quantative answer. NOT qualatitive. It also does not mean bash current ideas. Give a direct comparison, and state in clear sentences why you think your idea is better.

To answer you dont even how to say HOW your gearbos achieves this, just an estimate of efficiency gains. I would also like to see how you calculated current efficiencies.

autogyro wrote:

flynfrog wrote:A wise man once said the only reason we have a transmission is because we haven't built a good enough engine.

With an electric motor its possible to not use any transmission

It is possible to use an electric motor on a vehicle with a 'one' speed gearbox.
There still has to be an rpm drop, so there is a transmission as always. Ok it is also possible to use direct shaft drive but even then there has to be allowance for suspension/steering and in any case the motor will still probably have to be ratio matched. Unsprung weight is also a major factor.
However, the motor can be made more efficient by using a variation in output rpm.
The Tesla was designed with a three speed gearbox and this has been kept out of the huge marketing hype, because they could only get it to last 2000 miles. It now has a one speed gearbox.
The comparison between a one speed electric vehicle and a one speed dragster is useful as both can be much improved using a transmission, there is of course proof of this in the dragster development over the years.
So yes but no coconut.

last I checked top fuel has been improved by getting rid of the gears. There is no reason for a gearbox on an adjustable timing electric motor. with a wheel hub motor you eliminate any sort of transmission.

flynfrog wrote:

autogyro wrote:

flynfrog wrote:A wise man once said the only reason we have a transmission is because we haven't built a good enough engine.

With an electric motor its possible to not use any transmission

It is possible to use an electric motor on a vehicle with a 'one' speed gearbox.
There still has to be an rpm drop, so there is a transmission as always. Ok it is also possible to use direct shaft drive but even then there has to be allowance for suspension/steering and in any case the motor will still probably have to be ratio matched. Unsprung weight is also a major factor.
However, the motor can be made more efficient by using a variation in output rpm.
The Tesla was designed with a three speed gearbox and this has been kept out of the huge marketing hype, because they could only get it to last 2000 miles. It now has a one speed gearbox.
The comparison between a one speed electric vehicle and a one speed dragster is useful as both can be much improved using a transmission, there is of course proof of this in the dragster development over the years.
So yes but no coconut.

last I checked top fuel has been improved by getting rid of the gears. There is no reason for a gearbox on an adjustable timing electric motor. with a wheel hub motor you eliminate any sort of transmission.

Fuel Dragsters and funny cars have improved using tires developed to provide a constantly variable ratio through an increase in diameter when torque is applied.
The clutches are throw out clutches with weighted friction plates, designed to provide a further variable ratio between the engine and output using controlled clutch slip. Effectively a two speed CVT system with the addition of more gears using epicyclic lenco gearboxes manually throw shifted.
The efficiency of well controlled electric motors compared to new generation transmissions for full electric vehicles is an ongoing debate.
At present there is insufficient technical awareness between one discipline, electric and the other mechanical/vehicle. I have found that most electrical engineers doing work on electrical vehicles today seem to have little if any awareness of the time scale from prototype to perfected production vehicle and the huge raft of problems to overcome achieving this.

Failed to answer the question 4 times now.

Rather than me pointing it out every time you don't answer a sensible technical question. Why don't you just respond to this either with:

a. An answer to said question.
b. Admitting you won't ever answer a question that requires ANY analysis to determine if the unit has the potential to do what you say it will do.


If B is the case you may as well have just drawn a crude sketch on the back of a peice of bog roll.

xxChrisxx wrote:Failed to answer the question 4 times now.

I thought 'failed to answer the question' was simply 'failed to answer the question', not a quantative statement.

autogyro wrote:

xxChrisxx wrote:Failed to answer the question 4 times now.

I thought 'failed to answer the question' was simply 'failed to answer the question', not a quantative statement.

Yes indeed. The sky is blue. Except now its gone dark.

And the 20:25 Train to London is delayed.

you may as well have just drawn a crude sketch on the back of a peice of bog roll.

I have done exactly this. Can I start a thread about it?

bazanaius wrote:

you may as well have just drawn a crude sketch on the back of a peice of bog roll.

I have done exactly this. Can I start a thread about it?

Only if the paper wasn't 'used' after the sketch. In the case of this thread, I think it was.