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

On 2/5/2011 2:41 PM, John Doe wrote:
Jim Wilkinskb1dal gmail.com wrote:

John Doej... usenetlove.invalid wrote:
"Flaps_50!"moreflaps gmail.com wrote:

What are you asking about -zero rolling resistance????

Providing givens is common when asking for a calculation. By
suggesting zero rolling resistance, I was trying to make it
easier or at least achievable for anyone who has a clue. The
fact that you do not have a clue is useful information, but I
could have figured that out without your babbling.

Seems like you really deserve the responses you are getting from
the mechanical experts in rec.crafts.metalworking.

Definitely, in various groups. I enjoyed the replies about my most
recent bearings question. Also enjoyed some of the replies about
my recent "T-drive" question.

Some engineers fly aircraft, not all pilots are simpletons, and
others are smart enough. If someone does not know the answer to a
tough question, that does not exclude the entire group. So who
needs to know that you're an idiot?

Personally, I do not mind your babbling, but it is just noise to
anyone looking for information in the archive (assuming someday
Google Groups stops trashing the UseNet archive search). If Google
Groups makes the UseNet archive entirely useless, your babbling
will have less impact since there won't be any way to retrieve
useful information from the archive anyway.

Oh wail.

Considering I made a bit of a living working on Props and
Propulsion both Turboprop and Recip, I find you never gave enough
intelligent information for any kind of conclusion. I have
watched this "Discussion" regress into a slugfest and for what?
You presented an incomplete problem and NO Engineer of any kind
will approach it with any kind of a definitive answer. At least
one other person wanted more info. What he got was the old "Talk
Around" routine.

Here is my answer. Eat lots of Beans, shove a funnel up your
kiester and see just how fast you can get your tricycle to go.

On Feb 6, 9:20*am, John Doe wrote:
"Flaps_50!" moreflaps gmail.com wrote:
John Doe j... usenetlove.invalid 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.

20 mph is too fast for taxying.

Okay then, use 10 mph.

What are you asking about -zero rolling resistance????

Providing givens is common when asking for a calculation. By
suggesting zero rolling resistance, I was trying to make it easier
or at least achievable for anyone who has a clue. The fact that
you do not have a clue is useful information, but I could have
figured that out without your babbling.
--

Hmm. What do you think makes it hard to push a plane -zero rolling
resistance? Don't be so rude when you don't know how to frame a
problem properly. Describe the problem properly and someone may be
able to help you but after your rude response it won't be me.

"Flaps_50!" moreflaps gmail.com wrote:

John Doe j... usenetlove.invalid wrote:
"Flaps_50!" moreflaps gmail.com wrote:
John Doe j... usenetlove.invalid 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.

20 mph is too fast for taxying.

Okay then, use 10 mph.

What are you asking about -zero rolling resistance????

Providing givens is common when asking for a calculation. By
suggesting zero rolling resistance, I was trying to make it
easier or at least achievable for anyone who has a clue. The
fact that you do not have a clue is useful information, but I
could have figured that out without your babbling.

Hmm. What do you think makes it hard to push a plane -zero
rolling resistance?

You need to take a few more English-as-a-second-language lessons
and learn how to construct a sentence.

Given its weight, an aircraft might have more rolling resistance
than wind resistance when taxiing. But I would think that inertia
and wind resistance would play a big part too.

Don't be so rude

**** you.

when you don't know how to frame a problem properly.

Is English your second language?

Describe the problem properly and someone may be able to help
you

....or lead me on a wild goose chase, or troll me, whatever you
feel like doing.

but after your rude response it won't be me.

In other words... "I really don't know".
--



















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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)
Date: Sat, 5 Feb 2011 17:11:32 -0800 (PST)
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On 03 Feb 2011 22:55:12 GMT, 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?
--

http://heremypants.weebly.com/

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?

On 05 Feb 2011 23:45:42 GMT, 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, what would you allow for
maximum efficiency of the propeller and what are the limitations of
your power output to the propeller, and are we rolling or standing
start?
--

http://heremypants.weebly.com/

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...

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:
On 05 Feb 2011 23:45:42 GMT, 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, what would you allow for
maximum efficiency of the propeller and what are the limitations of
your power output to the propeller, and are we rolling or standing
start?


This is our old friend the propeller powered skater...

--

Richard Lamb
email me:
web site: http://www.home.earthlink.net/~cavelamb