A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Home Built
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

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



 
 
Thread Tools Display Modes
  #1  
Old February 3rd 11, 11:55 PM posted to rec.aviation.military,rec.aviation.piloting,rec.aviation.homebuilt
John Doe[_4_]
external usenet poster
 
Posts: 115
Default Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)

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.

Thanks.




--
I'm sure that is a tough question for anyone except an engineer in
the field. Please feel free to remove the other groups.
Ads
  #2  
Old February 5th 11, 10:56 AM posted to rec.aviation.military,rec.aviation.piloting,rec.aviation.homebuilt
Flaps_50!
external usenet poster
 
Posts: 117
Default Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)

On Feb 4, 11:55*am, 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.


20 mph is too fast for taxying. What are you asking about -zero
rolling resistance????

Cheers
  #3  
Old February 5th 11, 02:56 PM posted to rec.aviation.military,rec.aviation.piloting,rec.aviation.homebuilt
Brent[_2_]
external usenet poster
 
Posts: 12
Default Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)

Sounds like an airboat hovercraft or some other type of propeller driven
ground effect vehicle

Actually it sounds closer to something like a skateboard with as prop motor
and a user on it. you are missing a huge amount of variables and for props,
pitch, density altitude, motors, and at speeds that slow your in the wrong
group because very few things, If Any, in any of these groups fly at that
speed.

And aircraft move slow taxiing because they are not meant to be ground
vehicles they usually have very narrow stances and high centers of gravity
compared to a ground vehicle as soon as they have any kind of airspeed they
want to fly.

Look up an RC or Aeronautical engineering group on usenet or elsewhere. you
need to find design people not pilots



"Flaps_50!" wrote in message
...
On Feb 4, 11:55 am, 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.


20 mph is too fast for taxying. What are you asking about -zero
rolling resistance????

Cheers

  #4  
Old February 5th 11, 07:35 PM posted to rec.aviation.military,rec.aviation.piloting,rec.aviation.homebuilt
a[_3_]
external usenet poster
 
Posts: 562
Default Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)

On Feb 5, 8:56*am, "Brent" wrote:
Sounds like an airboat hovercraft or some other type of propeller driven
ground effect vehicle

Actually it sounds closer to something like a skateboard with as prop motor
and a user on it. you are missing a huge amount of variables and for props,
pitch, density altitude, motors, and at speeds that slow your in the wrong
group because very few things, If Any, in any of these groups fly at that
speed.

And aircraft move slow taxiing because they are not meant to be ground
vehicles they usually have very narrow stances and high centers of gravity
compared to a ground vehicle as soon as they have any kind of airspeed they
want to fly.

Look up an RC or Aeronautical engineering group on usenet or elsewhere. you
need to find design people not pilots

"Flaps_50!" wrote in message

...
On Feb 4, 11:55 am, 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.


20 mph is too fast for taxying. What are you asking about -zero
rolling resistance????

Cheers


To add a little to this: zero rolling resistance means all that has to
be overcome is aerodynamic drag, and one needs to know something about
the shape of what is being moved. Air weighs about 0.08 pounds a cubic
foot, you simply have to decide how long you want to take to get to
whatever speed, that will tell you the force you need. F still equals
mass times accelerations, so then for any diameter prop there is a
certain rotation speed that'll throw aft the required mass of air. The
lower limit on prop diameter will have to do with keeping the tip
speeds sub sonic, the upper limit is related to mechanical factors. I
seem to remember props in general are about 30% efficient, if that
guess is true and you need 1 horsepower delivered you'll need an
engine that produces something over 3.

Why do I feel I'm answering someone's homework question?
  #5  
Old February 5th 11, 08:43 PM posted to rec.aviation.military,rec.aviation.piloting,rec.aviation.homebuilt
george
external usenet poster
 
Posts: 803
Default Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)

On Feb 6, 2:56*am, "Brent" wrote:
Sounds like an airboat hovercraft or some other type of propeller driven
ground effect vehicle

Actually it sounds closer to something like a skateboard with as prop motor
and a user on it. you are missing a huge amount of variables and for props,
pitch, density altitude, motors, and at speeds that slow your in the wrong
group because very few things, If Any, in any of these groups fly at that
speed.

And aircraft move slow taxiing because they are not meant to be ground
vehicles they usually have very narrow stances and high centers of gravity
compared to a ground vehicle as soon as they have any kind of airspeed they
want to fly.

Look up an RC or Aeronautical engineering group on usenet or elsewhere. you
need to find design people not pilots

"Flaps_50!" wrote in message

...
On Feb 4, 11:55 am, 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.


20 mph is too fast for taxying. What are you asking about -zero
rolling resistance????

We taxied at 'walking pace' which meant sometimes a little faster to
make a gate or taxiway :-)

  #6  
Old February 5th 11, 09:05 PM posted to rec.aviation.military,rec.aviation.piloting,rec.aviation.homebuilt
John Doe[_4_]
external usenet poster
 
Posts: 115
Default Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)

a pappson gmail.com wrote:

On Feb 5, 8:56˙am, "Brent" b_phil... hotmail.com wrote:
Sounds like an airboat hovercraft or some other type of propeller driven
ground effect vehicle

Actually it sounds closer to something like a skateboard with as prop mot

or
and a user on it. you are missing a huge amount of variables and for prop

s,
pitch, density altitude, motors, and at speeds that slow your in the wron

g
group because very few things, If Any, in any of these groups fly at that
speed.

And aircraft move slow taxiing because they are not meant to be ground
vehicles they usually have very narrow stances and high centers of gravit

y
compared to a ground vehicle as soon as they have any kind of airspeed th

ey
want to fly.

Look up an RC or Aeronautical engineering group on usenet or elsewhere. y

ou
need to find design people not pilots

"Flaps_50!" morefl... gmail.com wrote in message

news:fcb480ce-e285-47c4-87dc-8a9257583974 o7g2000prn.googlegroups.com...
On Feb 4, 11:55 am, John Doe j... usenetlove.invalid wrote: Is there s

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

Cheers


To add a little to this: zero rolling resistance means all that has to
be overcome is aerodynamic drag, and one needs to know something about
the shape of what is being moved. Air weighs about 0.08 pounds a cubic
foot, you simply have to decide how long you want to take to get to
whatever speed, that will tell you the force you need. F still equals
mass times accelerations, so then for any diameter prop there is a
certain rotation speed that'll throw aft the required mass of air. The
lower limit on prop diameter will have to do with keeping the tip
speeds sub sonic, the upper limit is related to mechanical factors. I
seem to remember props in general are about 30% efficient, if that
guess is true and you need 1 horsepower delivered you'll need an
engine that produces something over 3.

Why do I feel I'm answering someone's homework question?


Maybe because you are a Google Groups user.
--



















see also Google Groups
Path: news.astraweb.com!border6.newsrouter.astraweb.com! npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!postnews.google.com!r21g2000yqd.googlegr oups.com!not-for-mail
From: a pappson 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 10:35:18 -0800 (PST)
Organization: http://groups.google.com
Lines: 56
Message-ID: 8f08b3ad-a0c3-4b20-857b-14c22081bca6 r21g2000yqd.googlegroups.com
References: 4d4b324f$0$26911$c3e8da3$33881b6a news.astraweb.com fcb480ce-e285-47c4-87dc-8a9257583974 o7g2000prn.googlegroups.com iijkv3$9c7$1 news.eternal-september.org
NNTP-Posting-Host: 174.109.180.208
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1296930918 1624 127.0.0.1 (5 Feb 2011 18:35:18 GMT)
X-Complaints-To: groups-abuse google.com
NNTP-Posting-Date: Sat, 5 Feb 2011 18:35:18 +0000 (UTC)
Complaints-To: groups-abuse google.com
Injection-Info: r21g2000yqd.googlegroups.com; posting-host=174.109.180.208; posting-account=wyGAFgoAAACOdZRjCqGm4sY24S8zhtSL
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13,gzip(gfe)

  #7  
Old February 5th 11, 09:08 PM posted to rec.aviation.military,rec.aviation.piloting,rec.aviation.homebuilt
John Doe[_4_]
external usenet poster
 
Posts: 115
Default Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)

"Brent" b_philion hotmail.com wrote:

Sounds like an airboat hovercraft or some other type of propeller driven
ground effect vehicle

Actually it sounds closer to something like a skateboard with as prop motor
and a user on it. you are missing a huge amount of variables and for props,
pitch, density altitude, motors, and at speeds that slow your in the wrong
group


"that slow your" = "that show you are" ?

because very few things, If Any, in any of these groups fly at that
speed.

And aircraft move slow taxiing because they are not meant to be ground
vehicles they usually have very narrow stances and high centers of gravity
compared to a ground vehicle as soon as they have any kind of airspeed they
want to fly.

Look up an RC or Aeronautical engineering group on usenet or elsewhere. you
need to find design people not pilots


Or someone who can at least write...
--

















"Flaps_50!" moreflaps gmail.com wrote in message
news:fcb480ce-e285-47c4-87dc-8a9257583974 o7g2000prn.googlegroups.com...
On Feb 4, 11:55 am, 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. What are you asking about -zero
rolling resistance????

Cheers



Path: news.astraweb.com!border6.newsrouter.astraweb.com! news.glorb.com!news2.glorb.com!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail
From: "Brent" b_philion hotmail.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 08:56:39 -0500
Organization: A noiseless patient Spider
Lines: 37
Message-ID: iijkv3$9c7$1 news.eternal-september.org
References: 4d4b324f$0$26911$c3e8da3$33881b6a news.astraweb.com fcb480ce-e285-47c4-87dc-8a9257583974 o7g2000prn.googlegroups.com
Mime-Version: 1.0
Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original
Content-Transfer-Encoding: 7bit
Injection-Date: Sat, 5 Feb 2011 13:56:51 +0000 (UTC)
Injection-Info: mx02.eternal-september.org; posting-host="xYLfF8Lb0bp2wp8oENpIHA"; logging-data="9607"; mail-complaints-to="abuse eternal-september.org"; posting-account="U2FsdGVkX1+B/Bq5SBEMU+t3/WD5HnKQIqjXJoitkek="
X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18483
In-Reply-To: fcb480ce-e285-47c4-87dc-8a9257583974 o7g2000prn.googlegroups.com
X-Newsreader: Microsoft Windows Mail 6.0.6001.18416
Cancel-Lock: sha1:EC3Z+JO44uhq890OIgPBe02FbqM=
X-Priority: 3
X-MSMail-Priority: Normal

  #8  
Old February 5th 11, 09:20 PM posted to rec.aviation.military,rec.aviation.piloting,rec.aviation.homebuilt
John Doe[_4_]
external usenet poster
 
Posts: 115
Default Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)

"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.
--




















Cheers

see also Google Groups
Path: news.astraweb.com!border6.newsrouter.astraweb.com! news-out.readnews.com!transit3.readnews.com!postnews.go ogle.com!o7g2000prn.googlegroups.com!not-for-mail
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 01:56:54 -0800 (PST)
Organization: http://groups.google.com
Lines: 15
Message-ID: fcb480ce-e285-47c4-87dc-8a9257583974 o7g2000prn.googlegroups.com
References: 4d4b324f$0$26911$c3e8da3$33881b6a news.astraweb.com
NNTP-Posting-Host: 125.237.11.218
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1296899814 21734 127.0.0.1 (5 Feb 2011 09:56:54 GMT)
X-Complaints-To: groups-abuse google.com
NNTP-Posting-Date: Sat, 5 Feb 2011 09:56:54 +0000 (UTC)
Complaints-To: groups-abuse google.com
Injection-Info: o7g2000prn.googlegroups.com; posting-host=125.237.11.218; posting-account=6xbCsQoAAADFV3zSSyqtlmEntvryq9MZ
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_8; en-US) AppleWebKit/534.10 (KHTML, like Gecko) Chrome/8.0.552.237 Safari/534.10,gzip(gfe)

  #9  
Old February 5th 11, 10:09 PM posted to rec.aviation.military,rec.aviation.piloting,rec.aviation.homebuilt
Jim Wilkins
external usenet poster
 
Posts: 57
Default Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)

On Feb 5, 3:20*pm, John Doe 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.

  #10  
Old February 5th 11, 10:41 PM posted to rec.aviation.military,rec.aviation.piloting,rec.aviation.homebuilt
John Doe[_4_]
external usenet poster
 
Posts: 115
Default Taxi calculator? (propeller type and speed, aircraft weight, taxi speed)

Jim Wilkins kb1dal gmail.com wrote:

John Doe j... 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.
--




















See also Google Groups
Path: news.astraweb.com!border6.newsrouter.astraweb.com! npeer02.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!postnews.google.com!x3g2000yqj.googlegro ups.com!not-for-mail
From: Jim Wilkins kb1dal 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 13:09:25 -0800 (PST)
Organization: http://groups.google.com
Lines: 15
Message-ID: af01f10c-b720-499e-8cb6-6710038c9217 x3g2000yqj.googlegroups.com
References: 4d4b324f$0$26911$c3e8da3$33881b6a news.astraweb.com fcb480ce-e285-47c4-87dc-8a9257583974 o7g2000prn.googlegroups.com 4d4db0f2$0$29578$c3e8da3$92d0a893 news.astraweb.com
NNTP-Posting-Host: 4.233.128.125
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1296940165 31885 127.0.0.1 (5 Feb 2011 21:09:25 GMT)
X-Complaints-To: groups-abuse google.com
NNTP-Posting-Date: Sat, 5 Feb 2011 21:09:25 +0000 (UTC)
Complaints-To: groups-abuse google.com
Injection-Info: x3g2000yqj.googlegroups.com; posting-host=4.233.128.125; posting-account=uJ_OVwoAAACkzDtuixjW5ZglsAOckb0n
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0),gzip(gfe)

 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Taxi calculator? (propeller type and speed, aircraft weight, taxi speed) John Doe[_4_] General Aviation 0 February 3rd 11 11:55 PM
Taxi speed Hilton Piloting 21 April 10th 07 01:03 AM
Any info on WC Pye Course & Speed Calculator Jack McAdams Owning 2 June 23rd 04 03:55 PM
Any info on WC Pye Course & Speed Calculator Jack McAdams Piloting 2 June 23rd 04 03:55 PM


All times are GMT +1. The time now is 03:47 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright ©2004-2020 AviationBanter.
The comments are property of their posters.