Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)

heirophant wrote:

John Doe wrote:
heirophant heremypants hushmail.com wrote:
John Doe wrote:

Is there such a calculation/formula? How can you tell what
propeller to use, how fast it should rotate, and how much
weight it can push along the ground?

Specifically... I would like to tell what sort and size of
propeller rotating at what speed, in calm air to push 100 or
200 pounds on smooth and level pavement with zero rolling
resistance to about 20 mph.

Far too little information to arrive at an answer. Could you
tighten the variables a bit?

What other variables do you need?

How quickly do you wish to reach Xmph,

Five or ten seconds.

what would you allow for maximum efficiency of the propeller

Whatever type of propeller is best for taxing purposes.

and what are the limitations of your power output to the
propeller,

None. The propeller spins that whatever RPM is needed.

and are we rolling or standing start?

Standing.

I suppose the wind resistance of a typical light/small aircraft on
the ground would be in the ballpark.

On Feb 6, 1:33*pm, John Doe wrote:
heirophant wrote:
John Doe wrote:
heirophant heremypants hushmail.com wrote:
*John Doe wrote:

Is there such a calculation/formula? How can you tell what
propeller to use, how fast it should rotate, and how much
weight it can push along the ground?

Specifically... I would like to tell what sort and size of
propeller rotating at what speed, in calm air to push 100 or
200 pounds on smooth and level pavement with zero rolling
resistance to about 20 mph.

Far too little information to arrive at an answer. Could you
tighten the variables a bit?

What other variables do you need?

How quickly do you wish to reach Xmph,

Five or ten seconds.

what would you allow for maximum efficiency of the propeller

Whatever type of propeller is best for taxing purposes.

and what are the limitations of your power output to the
propeller,

None. The propeller spins that whatever RPM is needed.

and are we rolling or standing start?

Standing.

I suppose the wind resistance of a typical light/small aircraft on
the ground would be in the ballpark.

Ignoring rolling resistance, look at the power consumption of a plane
at cruise, then note that aerodynamic drag could be estimated to
follow the square of speed. So, if 100 HP- 100 mph then 10 mph = 1
HP. Rolling resistance is the biggest factor though as you should
know...

"Flaps_50!" moreflaps gmail.com wrote:

John Doe j... usenetlove.invalid wrote:
heirophant heremypa... hushmail.com wrote:
John Doe wrote:
heirophant heremypants hushmail.com wrote:
ÿJohn Doe wrote:

Is there such a calculation/formula? How can you tell what
propeller to use, how fast it should rotate, and how much
weight it can push along the ground?

Specifically... I would like to tell what sort and size of
propeller rotating at what speed, in calm air to push 100
or 200 pounds on smooth and level pavement with zero
rolling resistance to about 20 mph.

Far too little information to arrive at an answer. Could
you tighten the variables a bit?

What other variables do you need?

How quickly do you wish to reach Xmph,

Five or ten seconds.

what would you allow for maximum efficiency of the propeller

Whatever type of propeller is best for taxing purposes.

and what are the limitations of your power output to the
propeller,

None. The propeller spins that whatever RPM is needed.

and are we rolling or standing start?

Standing.

I suppose the wind resistance of a typical light/small aircraft
on the ground would be in the ballpark.

Ignoring rolling resistance, look at the power consumption of a
plane at cruise, then note that aerodynamic drag could be
estimated to follow the square of speed. So, if 100 HP- 100 mph
then 10 mph = 1 HP. Rolling resistance is the biggest factor
though as you should know...

My experience suggests that wind resistance at speed is
significantly greater than rolling resistance.
--



















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From: "Flaps_50!" moreflaps gmail.com
Newsgroups: rec.aviation.military,rec.aviation.piloting,rec.av iation.homebuilt
Subject: Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)
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On 06 Feb 2011 00:33:27 GMT, John Doe wrote:

heirophant wrote:

John Doe wrote:
heirophant heremypants hushmail.com wrote:
John Doe wrote:

Is there such a calculation/formula? How can you tell what
propeller to use, how fast it should rotate, and how much
weight it can push along the ground?

Specifically... I would like to tell what sort and size of
propeller rotating at what speed, in calm air to push 100 or
200 pounds on smooth and level pavement with zero rolling
resistance to about 20 mph.

Far too little information to arrive at an answer. Could you
tighten the variables a bit?

What other variables do you need?

How quickly do you wish to reach Xmph,

Five or ten seconds.

what would you allow for maximum efficiency of the propeller

Whatever type of propeller is best for taxing purposes.

and what are the limitations of your power output to the
propeller,

None. The propeller spins that whatever RPM is needed.

and are we rolling or standing start?

Standing.

I suppose the wind resistance of a typical light/small aircraft on
the ground would be in the ballpark.

Here we have come to an impasse. You wish to receive a set of answers
to a very difficult question unknowing that the quality or response,
or any response, lies in providing a full set of the variables.

Love to help you out but before I put forward any additional effort,
why is it that you need the answers.
--

http://heremypants.weebly.com/

heirophant wrote:

John Doe wrote:
heirophant wrote:
John Doe wrote:
heirophant heremypants hushmail.com wrote:
John Doe wrote:

Is there such a calculation/formula? How can you tell what
propeller to use, how fast it should rotate, and how much
weight it can push along the ground?

Specifically... I would like to tell what sort and size of
propeller rotating at what speed, in calm air to push 100
or 200 pounds on smooth and level pavement with zero
rolling resistance to about 20 mph.

Far too little information to arrive at an answer. Could you
tighten the variables a bit?

What other variables do you need?

How quickly do you wish to reach Xmph,

Five or ten seconds.

what would you allow for maximum efficiency of the propeller

Whatever type of propeller is best for taxing purposes.

and what are the limitations of your power output to the
propeller,

None. The propeller spins that whatever RPM is needed.

and are we rolling or standing start?

Standing.

I suppose the wind resistance of a typical light/small aircraft
on the ground would be in the ballpark.

Here we have come to an impasse. You wish to receive a set of
answers to a very difficult question

Granted, very difficult. Probably mainly because propeller power
is rarely used for land based vehicles.

unknowing that the quality or response, or any response,

I get what I pay for.

lies in providing a full set of the variables.

I jumped through that hoop last time.

Love to help you out but before I put forward any additional
effort, why is it that you need the answers.

Yes, and I would love to keep asking...

According to YouTube, a significant number of people have used
propeller power for pushing a bicycle. I wonder if any of them
have calculated their design, or if all of them have been simple
experiments. That is probably what I will end up doing some day.

But, somehow I doubt there is a forum for propeller powered
bicycles, lol, anywhere on the Internet.
--

On 2/5/2011 8:32 PM, John Doe wrote:
wrote:

John Doe wrote:
wrote:
John Doe wrote:
heirophantheremypants hushmail.com wrote:
John Doe wrote:

Is there such a calculation/formula? How can you tell what
propeller to use, how fast it should rotate, and how much
weight it can push along the ground?

Specifically... I would like to tell what sort and size of
propeller rotating at what speed, in calm air to push 100
or 200 pounds on smooth and level pavement with zero
rolling resistance to about 20 mph.

Far too little information to arrive at an answer. Could you
tighten the variables a bit?

What other variables do you need?

How quickly do you wish to reach Xmph,

Five or ten seconds.

what would you allow for maximum efficiency of the propeller

Whatever type of propeller is best for taxing purposes.

and what are the limitations of your power output to the
propeller,

None. The propeller spins that whatever RPM is needed.

and are we rolling or standing start?

Standing.

I suppose the wind resistance of a typical light/small aircraft
on the ground would be in the ballpark.

Here we have come to an impasse. You wish to receive a set of
answers to a very difficult question

Granted, very difficult. Probably mainly because propeller power
is rarely used for land based vehicles.

unknowing that the quality or response, or any response,

I get what I pay for.

lies in providing a full set of the variables.

I jumped through that hoop last time.

Love to help you out but before I put forward any additional
effort, why is it that you need the answers.

Yes, and I would love to keep asking...

According to YouTube, a significant number of people have used
propeller power for pushing a bicycle. I wonder if any of them
have calculated their design, or if all of them have been simple
experiments. That is probably what I will end up doing some day.

But, somehow I doubt there is a forum for propeller powered
bicycles, lol, anywhere on the Internet.

And you would be wrong. Look at
http://motorbicycling.com/f36/propel...some-7683.html

And to give you a demo, go to
http://www.youtube.com/watch?v=7h7AmVPpaEY

Or how about
http://www.youtube.com/watch?v=W7h97...eature=related if you
are into 4 wheeled insanity.

Now for something that actually worked and was licensed.
http://www.youtube.com/watch?v=4KSOS...eature=related

But the skate board, can of beans with the funnel up you butt is
still my suggestion for you. Oh, make sure you stop real fast
once. That would really cause a lot of laughs at the nearest
emergency room. They wouldn't see that every day.

Daryl Hunt dhunt nspami70west.com wrote:

John Doe wrote:
heirophantheremypants hushmail.com wrote:
John Doe wrote:
heirophantheremypants hushmail.com wrote:
John Doe wrote:
heirophantheremypants hushmail.com wrote:
John Doe wrote:

Is there such a calculation/formula? How can you tell what
propeller to use, how fast it should rotate, and how much
weight it can push along the ground?

Specifically... I would like to tell what sort and size of
propeller rotating at what speed, in calm air to push 100
or 200 pounds on smooth and level pavement with zero
rolling resistance to about 20 mph.

Far too little information to arrive at an answer. Could you
tighten the variables a bit?

What other variables do you need?

How quickly do you wish to reach Xmph,

Five or ten seconds.

what would you allow for maximum efficiency of the propeller

Whatever type of propeller is best for taxing purposes.

and what are the limitations of your power output to the
propeller,

None. The propeller spins that whatever RPM is needed.

and are we rolling or standing start?

Standing.

I suppose the wind resistance of a typical light/small aircraft
on the ground would be in the ballpark.

Here we have come to an impasse. You wish to receive a set of
answers to a very difficult question

Granted, very difficult. Probably mainly because propeller power
is rarely used for land based vehicles.

unknowing that the quality or response, or any response,

I get what I pay for.

lies in providing a full set of the variables.

I jumped through that hoop last time.

Love to help you out but before I put forward any additional
effort, why is it that you need the answers.

Yes, and I would love to keep asking...

According to YouTube, a significant number of people have used
propeller power for pushing a bicycle. I wonder if any of them
have calculated their design, or if all of them have been simple
experiments. That is probably what I will end up doing some day.

But, somehow I doubt there is a forum for propeller powered
bicycles, lol, anywhere on the Internet.

And you would be wrong. Look at
http://motorbicycling.com/f36/propel...some-7683.html

I said "forum", ****, not a single thread.

And to give you a demo, go to
http://www.youtube.com/watch?v=7h7AmVPpaEY

Apparently you did not read my post, ****, I said that there are a
few propeller powered bicycles on YouTube.

I'm glad some of you find the subject interesting, even the
clueless trolls.
--















Or how about
http://www.youtube.com/watch?v=W7h97...eature=related if you
are into 4 wheeled insanity.

Now for something that actually worked and was licensed.
http://www.youtube.com/watch?v=4KSOS...eature=related

But the skate board, can of beans with the funnel up you butt is
still my suggestion for you. Oh, make sure you stop real fast
once. That would really cause a lot of laughs at the nearest
emergency room. They wouldn't see that every day.





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From: Daryl Hunt dhunt nspami70west.com
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Subject: Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)
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On 2/5/2011 9:52 PM, John Doe wrote:
Daryl Huntdhunt nspami70west.com wrote:

And you would be wrong. Look at
http://motorbicycling.com/f36/propel...some-7683.html

I said "forum", ****, not a single thread.

You asked and I delivered. So you change the rules to fit your
troll. Good for you.




And to give you a demo, go to
http://www.youtube.com/watch?v=7h7AmVPpaEY

Apparently you did not read my post, ****, I said that there are a
few propeller powered bicycles on YouTube.

I'm glad some of you find the subject interesting, even the
clueless trolls.

Now, about that skate board, can of beans, funnel where the sun
don't shine and a fast stop.

Daryl Hunt dhunt nspami70west.com wrote:

Now, about that skate board, can of beans, funnel where the sun
don't shine and a fast stop.

Confucius say:
"He who is constantly exposing his ass should beware of funnels"