Blowhards Sailing Downwind

[John Fields]

On Tue, 17 Aug 2010 17:47:12 -0700, John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Tue, 17 Aug 2010 16:45:43 -0700, Beryl <fourl@road.net> wrote:

Nobody wrote:
On Mon, 16 Aug 2010 20:29:36 -0700, Beryl wrote:

Your gizmo beats using a generator to supply juice to an electric motor,
which then spins the generator, which feeds the motor, which spins...
Your gizmo surpasses the mere 100% efficiency of that perpetual motion
machine, it creates excess power out of nothingness.

No it doesn't. The truck supplies power for both vehicles, and the truck's
fuel consumption will reflect this.

Yes. The faster you push the car ahead of the truck, the more work the
truck has to do to maintain 10 MPH.


Yabbut John suggests to use cruise control so you won't notice this.

Whether the 10 MPH is servoed by foot control or cruise control
doesn't matter.

To see fuel consumption, look at the gas gauge. Or an MPG display, if
you have one.

---
Tsk,tsk,tsk...

Don't you mean km/l?

---
JF

 

[Jasen Betts]

On 2010-08-17, Beryl <fourl@road.net> wrote:

Jasen Betts wrote:

Here's how the other half works:
With a headwind, airspeed is greater than groundspeed. For the same
Power (P) at each end of the system, there is less Force (drag) exerted
on the propeller, and more Force, as thrust, output at the wheel. Viola!
The propeller now powers the wheel.

And there's almost always some wind.
Every Big Rig on the highways needs to have this system installed.
Ships can put propellers up in the wind and attach generators to their
water propellers to reap the benefits too.
Why isn't this system being used?

low bridges, oil is still cheap. "almost" isn't "always", water is
harder to work with than tarmac.

¡spuɐɥ ou 'ɐꟽ ʞooꞀ

I almost thought I had an Aussie font installed.

unfotunately it's wasted on most widers users as they don't
have the fonts installed

hmm, there's a section of unicode for fractur:


𝕬 𝕮 𝕳 𝕿 𝖀 𝕹 𝕲 ! 𝕬 𝕷 𝕷 𝕰 𝕾 𝕷 𝕺 𝕺 𝕶 𝕰 𝕹 𝕾 𝕻 𝕰 𝕰 𝕻 𝕰 𝕽 𝕾 !

𝕯𝖆𝖘 𝖈𝖔𝖒𝖕𝖚𝖙𝖊𝖗𝖒𝖆𝖈𝖍𝖎𝖓𝖊 𝖎𝖘𝖙 𝖓𝖎𝖈𝖍𝖙 𝖋𝖚𝖊𝖗 𝖌𝖊𝖋𝖎𝖓𝖌𝖊𝖗𝖕𝖔𝖐𝖊𝖓 𝖚𝖓𝖉
𝖒𝖎𝖙𝖙𝖊𝖓𝖌𝖗𝖆𝖇𝖇𝖊𝖓. 𝕴𝖘𝖙 𝖊𝖆𝖘𝖞 𝖘𝖈𝖍𝖓𝖆𝖕𝖕𝖊𝖓 𝖉𝖊𝖗 𝖘𝖕𝖗𝖎𝖓𝖌𝖊𝖓𝖜𝖊𝖗𝖐, 𝖇𝖑𝖔𝖜𝖊𝖓𝖋𝖚𝖘𝖊𝖓
𝖚𝖓𝖉 𝖕𝖔𝖕𝖕𝖊𝖓𝖈𝖔𝖗𝖐𝖊𝖓 𝖒𝖎𝖙 𝖘𝖕𝖎𝖙𝖟𝖊𝖓𝖘𝖕𝖆𝖗𝖐𝖊𝖓. 𝕴𝖘𝖙 𝖓𝖎𝖈𝖍𝖙 𝖋𝖚𝖊𝖗 𝖌𝖊𝖜𝖊𝖗𝖐𝖊𝖓 𝖇𝖊𝖎
𝖉𝖆𝖘 𝖉𝖚𝖒𝖕𝖐𝖔𝖕𝖋𝖊𝖓. 𝕯𝖆𝖘 𝖗𝖚𝖇𝖇𝖊𝖗𝖓𝖊𝖈𝖐𝖊𝖓 𝖘𝖎𝖈𝖍𝖙𝖘𝖊𝖊𝖗𝖊𝖓 𝖐𝖊𝖊𝖕𝖊𝖓 𝖉𝖆𝖘
𝖈𝖔𝖙𝖙𝖊𝖓-𝖕𝖎𝖈𝖐𝖊𝖓𝖊𝖓 𝖍𝖆𝖓𝖘 𝖎𝖓 𝖉𝖆𝖘 𝖕𝖔𝖈𝖐𝖊𝖙𝖘 𝖒𝖚𝖘𝖘; 𝖗𝖊𝖑𝖆𝖝𝖊𝖓 𝖚𝖓𝖉 𝖜𝖆𝖙𝖈𝖍𝖊𝖓
𝖉𝖆𝖘 𝖇𝖑𝖎𝖓𝖐𝖊𝖓𝖑𝖎𝖈𝖍𝖙𝖊𝖓.


Interestingly google understands it but google translate does not


𝕵𝖆𝖘𝖊𝖓.


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[Jasen Betts]

On 2010-08-18, Bill Bowden <wrongaddress@att.net> wrote:

Where is the force when the apparent wind is zero?

the force comes from the propellor.

--
¡spuɐɥ ou 'ɐꟽ ʞooꞀ

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[Nobody]

On Tue, 17 Aug 2010 20:38:29 -0700, Bill Bowden wrote:

Ok, I get the idea about the truck pushing the car faster than the
truck since the jack can be geared to move 2 feet to the rear while
the car moves 1 foot ahead.
Therefore when the truck moves 1 foot ahead, the car moves 2 feet
ahead at increased speed. So as long as the truck can keep pushing,
the car will keep accelerating. Interesting idea.

Not accelerating. If the truck moves at a constant speed, the car moves at
a constant speed, which is faster than that of the truck, and thus
continually moves further ahead of the truck.

But in the real world, it seems the truck cannot keep pushing against
another truck that pushes in the reverse direction, when the apparent
wind is zero.

Where is the force when the apparent wind is zero?

From the propeller.

 

[Nobody]

On Wed, 18 Aug 2010 00:01:17 -0700, Beryl wrote:

Of course. If it's pushing a car that's going 10 MPH, it has to do
some work. If it's pushing a car that's pushing back, so that the car
is moving 12 MPH, the truck engine has to do more work, even though
the truck is still going 10 MPH.

Sounds familiar.
The jack is

(1) Speeding up car
+ (-1) Holding back truck
-----------------------------
*ZERO*

If they were the Bentley and S-10, it would appear that the car was
still going 10 MPH and the truck slowed to 8.
Or they'd go 9 and 11 if they were equal weight.
So the jack is pushing two masses apart at 2 MPH, no net gain.

Correct. It's *extracting* energy (which is being provided by the truck),
not creating it.

You know that the truck has to work harder or else it slows down. What
about the wind? Same deal, it has to work harder, or else slow down.
Will you deploy more sail when the system turns on? That will help
maintain the car's speed close to, but less than, the 10 MPH tailwind.

The wind-powered vehicle has no sail. It has a propeller.

The reason is that a sail can't extract power from a wind whose velocity
(speed and direction) matches that of the vehicle. A propeller *can*
extract wind power under these circumstances.

But I'm sure you're not going to get it.

The Rube Goldberg setup returns most of the power that it has taken from
the external source that's really pushing the car along. I get that.

The propeller-driven vehicle takes some power from the wheel and uses this
to extract *more* power from the wind.

Think of it like an electric generator. The big ones that are used in
power stations don't use permanent magnets; both the rotor and stator have
coils.

In order to extract power from the stator windings, the coils in the rotor
must be powered. Once the generator is producing power, you can obtain the
power for the rotor coils from output of the generator itself.

The generator produces far more power than is necessary to power the rotor
coils. This isn't a "free lunch", as the generator is taking energy from
the turbine. But it has to use some of the energy it produces to power the
mechanism by which it extracts that energy.

 

[Beryl]

Nobody wrote:

The propeller-driven vehicle takes some power from the wheel and uses this
to extract *more* power from the wind.
Think of it like an electric generator. The big ones that are used in
power stations don't use permanent magnets; both the rotor and stator have
coils.

In order to extract power from the stator windings, the coils in the rotor
must be powered. Once the generator is producing power, you can obtain the
power for the rotor coils from output of the generator itself.
The generator produces far more power than is necessary to power the rotor
coils. This isn't a "free lunch", as the generator is taking energy from
the turbine. But it has to use some of the energy it produces to power the
mechanism by which it extracts that energy.

1. Now extract more power from falling water to make the turbine turn
faster than the water pushing it.

2. Use some of that extra turbine speed to pump some discharge water
back up to a higher level, bringing turbine speed back to normal.

3. Release the water that you raised, to power more turbines.

4. goto 1.

 

[Nobody]

On Wed, 18 Aug 2010 20:10:14 -0700, Beryl wrote:

1. Now extract more power from falling water to make the turbine turn
faster than the water pushing it.

Most turbines are axial-flow, which can move much faster than the fluid
(in much the same way that you can sail perpendicular to the wind much
faster than the wind).

2. Use some of that extra turbine speed to pump some discharge water
back up to a higher level, bringing turbine speed back to normal.

Define "normal". In any case, there's no problem pumping "some discharge
water up to a higher level". You certainly won't be able to pump *all* of
the water back up to its *original* level.

3. Release the water that you raised, to power more turbines.

What's the point? The energy obtained from the additional turbines would
be less than that taken from the first turbine to pump the water.

But that has nothing to do with the propeller-cart.

 

[John Larkin]

On Fri, 20 Aug 2010 00:14:06 +0100, Nobody <nobody@nowhere.com> wrote:

On Wed, 18 Aug 2010 20:10:14 -0700, Beryl wrote:

1. Now extract more power from falling water to make the turbine turn
faster than the water pushing it.

Most turbines are axial-flow, which can move much faster than the fluid
(in much the same way that you can sail perpendicular to the wind much
faster than the wind).

2. Use some of that extra turbine speed to pump some discharge water
back up to a higher level, bringing turbine speed back to normal.

Define "normal". In any case, there's no problem pumping "some discharge
water up to a higher level". You certainly won't be able to pump *all* of
the water back up to its *original* level.

3. Release the water that you raised, to power more turbines.

What's the point? The energy obtained from the additional turbines would
be less than that taken from the first turbine to pump the water.

But that has nothing to do with the propeller-cart.

Right. People keep confusing the BeanieMobile with perpetual motion.
The BmB is wind powered. There's no free energy, no violation of
conservation of energy.

John

 

[Beryl]

John Larkin wrote:

On Fri, 20 Aug 2010 00:14:06 +0100, Nobody <nobody@nowhere.com> wrote:

Most turbines are axial-flow, which can move much faster than the fluid
(in much the same way that you can sail perpendicular to the wind much
faster than the wind).

Those of us who don't sail can liken it to sgueezing a watermelon seed
to make it shoot out from between our fingers.

The BmB is wind powered. There's no free energy, no violation of
conservation of energy.

There's free force, apparently.

Nobody (not Nobody, nobody) yet has anything to say about the
windmilling propeller. Hmm.

John

 

[John Larkin]

On Thu, 19 Aug 2010 21:39:18 -0700, Beryl <fourl@road.net> wrote:

John Larkin wrote:
On Fri, 20 Aug 2010 00:14:06 +0100, Nobody <nobody@nowhere.com> wrote:

Most turbines are axial-flow, which can move much faster than the fluid
(in much the same way that you can sail perpendicular to the wind much
faster than the wind).

Those of us who don't sail can liken it to sgueezing a watermelon seed
to make it shoot out from between our fingers.

The BmB is wind powered. There's no free energy, no violation of
conservation of energy.

There's free force, apparently.

Yes, force is not conserved. A 6-year old girl can lift a truck with a
good hydraulic jack.

Nobody (not Nobody, nobody) yet has anything to say about the
windmilling propeller. Hmm.

It's a pusher prop, not a windmill.

John

 

[Beryl]

John Larkin wrote:

On Thu, 19 Aug 2010 21:39:18 -0700, Beryl <fourl@road.net> wrote:

John Larkin wrote:
On Fri, 20 Aug 2010 00:14:06 +0100, Nobody <nobody@nowhere.com> wrote:

Most turbines are axial-flow, which can move much faster than the fluid
(in much the same way that you can sail perpendicular to the wind much
faster than the wind).
Those of us who don't sail can liken it to sgueezing a watermelon seed
to make it shoot out from between our fingers.

The BmB is wind powered. There's no free energy, no violation of
conservation of energy.
There's free force, apparently.

Yes, force is not conserved. A 6-year old girl can lift a truck with a
good hydraulic jack.

Nobody (not Nobody, nobody) yet has anything to say about the
windmilling propeller. Hmm.

It's a pusher prop, not a windmill.

LOL Pusher or tractor makes no difference at all. Until you start
powering it, it's a windmill. And the tailwind is turning it the wrong
way. I guarantee. Go play with a small fan, one you can spin by blowing
into it.

> John

 

[Beryl]

John Larkin wrote:

On Thu, 19 Aug 2010 21:39:18 -0700, Beryl <fourl@road.net> wrote:
John Larkin wrote:

The BmB is wind powered. There's no free energy, no violation of
conservation of energy.
There's free force, apparently.

Yes, force is not conserved. A 6-year old girl can lift a truck with a
good hydraulic jack.

And the truck will go up slower than the jack handle goes down. She
doesn't get force for free, she trades velocity for it.

 

[Jasen Betts]

On 2010-08-20, Beryl <fourl@road.net> wrote:

John Larkin wrote:
On Fri, 20 Aug 2010 00:14:06 +0100, Nobody <nobody@nowhere.com> wrote:

Most turbines are axial-flow, which can move much faster than the fluid
(in much the same way that you can sail perpendicular to the wind much
faster than the wind).

Those of us who don't sail can liken it to sgueezing a watermelon seed
to make it shoot out from between our fingers.

The BmB is wind powered. There's no free energy, no violation of
conservation of energy.

There's free force, apparently.

In that the air is free and the wind is made of the air
yes there is.

it doesn't take much force to maintain the speed.


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[John Fields]

On Thu, 19 Aug 2010 22:11:44 -0700, Beryl <fourl@road.net> wrote:

John Larkin wrote:
On Thu, 19 Aug 2010 21:39:18 -0700, Beryl <fourl@road.net> wrote:

John Larkin wrote:
On Fri, 20 Aug 2010 00:14:06 +0100, Nobody <nobody@nowhere.com> wrote:

Most turbines are axial-flow, which can move much faster than the fluid
(in much the same way that you can sail perpendicular to the wind much
faster than the wind).
Those of us who don't sail can liken it to sgueezing a watermelon seed
to make it shoot out from between our fingers.

The BmB is wind powered. There's no free energy, no violation of
conservation of energy.
There's free force, apparently.

Yes, force is not conserved. A 6-year old girl can lift a truck with a
good hydraulic jack.

Nobody (not Nobody, nobody) yet has anything to say about the
windmilling propeller. Hmm.

It's a pusher prop, not a windmill.

LOL Pusher or tractor makes no difference at all. Until you start
powering it, it's a windmill.

---
But it _is_ powered. By the tailwind.

Think of it like this:

1. First of all, the wheels are geared to the prop so that when the
cart moves forward the prop will turn counter-clockwise (from the
video) when looking into it from the front of the cart.

2. If there's a headwind the prop will be acting like a windmill
(turbine) and will turn the wheels so that the cart heads into the
wind.

3. If there's a tailwind, the drag from the prop (and whatever else
there is for the wind to push against at the rear of the cart) will
cause the wind to push the cart downwind, which will make the wheels
turn in the direction to cause the prop to rotate CCW, just as if
there was a headwind.

Now, since there's no headwind and only a little resistance in the
drive train (including the losses at the wheel/road interface, the
tailwind will cause the cart to accelerate, and the prop to spin
faster and faster as the cart hurtles down the track.

Eventually, when the cart reaches wind speed and is no longer being
pushed by the wind, the thrust from the prop will drive it into the
wind and, eventually, the prop will turn into a turbine and from 2,
above, will extract power from the headwind and feed it to the wheels,
which will keep the cart heading into the wind at the speed where the
power extracted from the headwind will equal the cart's losses.

That's my take on it, anyway...
---

And the tailwind is turning it the wrong
way. I guarantee. Go play with a small fan, one you can spin by blowing
into it.

---
But that's not how the cart's wired. See 1, above.

---
JF

 

[Beryl]

John Fields wrote:

On Thu, 19 Aug 2010 22:11:44 -0700, Beryl <fourl@road.net> wrote:

John Larkin wrote:
On Thu, 19 Aug 2010 21:39:18 -0700, Beryl <fourl@road.net> wrote:

John Larkin wrote:
On Fri, 20 Aug 2010 00:14:06 +0100, Nobody <nobody@nowhere.com> wrote:

Most turbines are axial-flow, which can move much faster than the fluid
(in much the same way that you can sail perpendicular to the wind much
faster than the wind).
Those of us who don't sail can liken it to sgueezing a watermelon seed
to make it shoot out from between our fingers.

The BmB is wind powered. There's no free energy, no violation of
conservation of energy.
There's free force, apparently.
Yes, force is not conserved. A 6-year old girl can lift a truck with a
good hydraulic jack.

Nobody (not Nobody, nobody) yet has anything to say about the
windmilling propeller. Hmm.
It's a pusher prop, not a windmill.
LOL Pusher or tractor makes no difference at all. Until you start
powering it, it's a windmill.

---
But it _is_ powered. By the tailwind.

That's a windmill.

Think of it like this:

1. First of all, the wheels are geared to the prop so that when the
cart moves forward the prop will turn counter-clockwise (from the
video) when looking into it from the front of the cart.

2. If there's a headwind the prop will be acting like a windmill
(turbine) and will turn the wheels so that the cart heads into the
wind.

3. If there's a tailwind, the drag from the prop (and whatever else
there is for the wind to push against at the rear of the cart) will
cause the wind to push the cart downwind, which will make the wheels
turn in the direction to cause the prop to rotate CCW, just as if
there was a headwind.

That's wrong. With a tailwind, the prop windmills CLOCKWISE when viewed
from the front. The car will BACK UP into the wind, just the same as it
goes forward into the wind in 2. above. The car is simply turned around!

The Miracle Propulsion System has a wheel and a propeller fighting each
other whenever the wind blows.

Now, since there's no headwind and only a little resistance in the
drive train (including the losses at the wheel/road interface, the
tailwind will cause the cart to accelerate, and the prop to spin
faster and faster as the cart hurtles down the track.

Eventually, when the cart reaches wind speed and is no longer being
pushed by the wind, the thrust from the prop will drive it into the
wind and, eventually, the prop will turn into a turbine and from 2,
above, will extract power from the headwind and feed it to the wheels,
which will keep the cart heading into the wind at the speed where the
power extracted from the headwind will equal the cart's losses.

That's my take on it, anyway...
---

And the tailwind is turning it the wrong
way. I guarantee. Go play with a small fan, one you can spin by blowing
into it.

---
But that's not how the cart's wired. See 1, above.

It's a contradiction.
Imagine the car is symmetrical, no front or back, just a box on wheels
and a prop on the roof.
In 1 and 2, it's wired to push the car upwind. In 3, it's wired to push
downwind.

---
JF

 

[John Fields]

On Fri, 20 Aug 2010 08:48:52 -0700, Beryl <fourl@road.net> wrote:

John Fields wrote:
On Thu, 19 Aug 2010 22:11:44 -0700, Beryl <fourl@road.net> wrote:

John Larkin wrote:
On Thu, 19 Aug 2010 21:39:18 -0700, Beryl <fourl@road.net> wrote:

John Larkin wrote:
On Fri, 20 Aug 2010 00:14:06 +0100, Nobody <nobody@nowhere.com> wrote:

Most turbines are axial-flow, which can move much faster than the fluid
(in much the same way that you can sail perpendicular to the wind much
faster than the wind).
Those of us who don't sail can liken it to sgueezing a watermelon seed
to make it shoot out from between our fingers.

The BmB is wind powered. There's no free energy, no violation of
conservation of energy.
There's free force, apparently.
Yes, force is not conserved. A 6-year old girl can lift a truck with a
good hydraulic jack.

Nobody (not Nobody, nobody) yet has anything to say about the
windmilling propeller. Hmm.
It's a pusher prop, not a windmill.
LOL Pusher or tractor makes no difference at all. Until you start
powering it, it's a windmill.

---
But it _is_ powered. By the tailwind.

That's a windmill.

---
Nope, the drag the cart presents to the wind is causing the wind to
push it forward, and the torque developed by the wheels as the wind
is pushing the cart forward is transferred to the prop through an
arrangement which causes it to turn bacward with respect to the
prevailing wind.
---

Think of it like this:

1. First of all, the wheels are geared to the prop so that when the
cart moves forward the prop will turn counter-clockwise (from the
video) when looking into it from the front of the cart.

2. If there's a headwind the prop will be acting like a windmill
(turbine) and will turn the wheels so that the cart heads into the
wind.

3. If there's a tailwind, the drag from the prop (and whatever else
there is for the wind to push against at the rear of the cart) will
cause the wind to push the cart downwind, which will make the wheels
turn in the direction to cause the prop to rotate CCW, just as if
there was a headwind.

That's wrong. With a tailwind, the prop windmills CLOCKWISE when viewed
from the front.

---
No, _that's_ wrong.

You're forgetting that the prop is being turned backwards
intentionally, by having the cart's drag catch the wind from behind.

Since the wind is coming from the rear it pushes the cart forward, and
the torque developed by the wheels, as they turn, is transferred to
the prop by gearing it so that the prop will turn backwards with
respect to tyhe prevailing wind.
---

The car will BACK UP into the wind, just the same as it
goes forward into the wind in 2. above.

---
The cart _can't_ back up into the wind because its wheels are forced
to turn so that the cart moves forward when the wind is at its back.
---

The car is simply turned around!

The Miracle Propulsion System has a wheel and a propeller fighting each
other whenever the wind blows.

---
Only when it's going slower than the wind.
---

Now, since there's no headwind and only a little resistance in the
drive train (including the losses at the wheel/road interface, the
tailwind will cause the cart to accelerate, and the prop to spin
faster and faster as the cart hurtles down the track.

Eventually, when the cart reaches wind speed and is no longer being
pushed by the wind, the thrust from the prop will drive it into the
wind and, eventually, the prop will turn into a turbine and from 2,
above, will extract power from the headwind and feed it to the wheels,
which will keep the cart heading into the wind at the speed where the
power extracted from the headwind will equal the cart's losses.

That's my take on it, anyway...
---

And the tailwind is turning it the wrong
way. I guarantee. Go play with a small fan, one you can spin by blowing
into it.

---
But that's not how the cart's wired. See 1, above.

It's a contradiction.
Imagine the car is symmetrical, no front or back, just a box on wheels
and a prop on the roof.
In 1 and 2, it's wired to push the car upwind. In 3, it's wired to push
downwind.

---
No.

In 1 and 2, the tailwind is pushing the cart, which turns the wheels,
which makes the propeller spin backwards.

In 3, the prop is acting like a turbine and the headwind spins the
prop, which turns the wheels, which drives the cart into the wind.

It's interesting to note that whether the wind is coming from the rear
or the front, the rotation of the prop is always in the same
direction.

I've got a sketch I'm working which (hopefully) will make things
clearer, and I'll post it to abse when I finish it, tomorrow sometime.

---
JF

 

[Beryl]

John Fields wrote:

I've got a sketch I'm working which (hopefully) will make things
clearer, and I'll post it to abse when I finish it, tomorrow sometime.

I hope you're using gears, shafts, chains and sprockets, visible stuff.

 

[Beryl]

Beryl wrote:

John Fields wrote:

I've got a sketch I'm working which (hopefully) will make things
clearer, and I'll post it to abse when I finish it, tomorrow sometime.

I hope you're using gears, shafts, chains and sprockets, visible stuff.

I've been working on mine! :^)
Nothing I have the nerve to present yet, but it's real simple - the
wheel is a pulley, there's another pulley on the propeller shaft, and
there's a twisted belt between the two. That's all it takes.

It looks like as the car goes faster, the wheel goes faster too. And
then the propeller goes faster, so the car just keeps going even faster.
This is scary.

 

[John Fields]

On Fri, 20 Aug 2010 19:43:07 -0700, Beryl <fourl@road.net> wrote:

Beryl wrote:
John Fields wrote:

I've got a sketch I'm working which (hopefully) will make things
clearer, and I'll post it to abse when I finish it, tomorrow sometime.

I hope you're using gears, shafts, chains and sprockets, visible stuff.

I've been working on mine! :^)
Nothing I have the nerve to present yet, but it's real simple - the
wheel is a pulley, there's another pulley on the propeller shaft, and
there's a twisted belt between the two. That's all it takes.

---
Perfect!

I used a sprocket on the prop shaft and another one on a right-angle
drive with the input to the drive being the wheel axles, so I wouldn't
have to twist the chain, but I like yours better. Much simpler.
---

It looks like as the car goes faster, the wheel goes faster too. And
then the propeller goes faster, so the car just keeps going even faster.
This is scary.

---
But thrilling, yes?

How about that moment of discovery when you saw the thing working, in
your mind, for the first time?

---
JF

 

[John Fields]

On Fri, 20 Aug 2010 19:43:07 -0700, Beryl <fourl@road.net> wrote:

Beryl wrote:
John Fields wrote:

I've got a sketch I'm working which (hopefully) will make things
clearer, and I'll post it to abse when I finish it, tomorrow sometime.

I hope you're using gears, shafts, chains and sprockets, visible stuff.

I've been working on mine! :^)
Nothing I have the nerve to present yet, but it's real simple - the
wheel is a pulley, there's another pulley on the propeller shaft, and
there's a twisted belt between the two. That's all it takes.

It looks like as the car goes faster, the wheel goes faster too. And
then the propeller goes faster, so the car just keeps going even faster.
This is scary.

---
Here's mine:

news:7vov665ft52l6mn2sbog9jtvnbni7u0tbf@4ax.com

---
JF