Angle of prop shaft - theoretical question
 

In way of stressing something otn is saying.
The major component of thrust for any angle of prop rotation is aft/back.
The components for up, down, to the right, to the left, are small.
Keep in mind that when we are saying up, down, right or left, we are not saying
straight up,down,left or right, but simply modifying the straight back
component ....slightly.
When going ahead, for most boats, the hull will never really feel or be
impacted by that "up" component, for the simple reason that it's up angle will
not reach the hull, prior to it clearing the stern.
When going astern, the same thing applies. The water is not be so much directed
"UP" or "Into" the hull, as it is being directed along the hull and quickly
clear of the hull, which allows for the same decreased efficiency of the 090 -
270 arc of the rotation in reverse (RH prop).
Steve, I think otn's response basically covered what I would have generally
said in my response to your last post to me, so I'll let his stand.

Shen

Angle of prop shaft - theoretical question
 

shen, the "down" component is indeed quite noticeable. In fact, it is the
reason outboard runababouts have the steering wheel on the right side of the
boat.

In way of stressing something otn is saying.
The major component of thrust for any angle of prop rotation is aft/back.
The components for up, down, to the right, to the left, are small.
Keep in mind that when we are saying up, down, right or left, we are not
saying
straight up,down,left or right, but simply modifying the straight back
component ....slightly.
When going ahead, for most boats, the hull will never really feel or be
impacted by that "up" component, for the simple reason that it's up angle
will
not reach the hull, prior to it clearing the stern.
When going astern, the same thing applies. The water is not be so much
directed
"UP" or "Into" the hull, as it is being directed along the hull and quickly
clear of the hull, which allows for the same decreased efficiency of the 090
-
270 arc of the rotation in reverse (RH prop).
Steve, I think otn's response basically covered what I would have generally
said in my response to your last post to me, so I'll let his stand.

Shen

Angle of prop shaft - theoretical question
 

Subject: Angle of prop shaft - theoretical question
From: (JAXAshby)


shen, the "down" component is indeed quite noticeable. In fact, it is the
reason outboard runababouts have the steering wheel on the right side of the
boat.


"THE" reason? No.
If it was THE reason and the boat needed that offset weight to counter the
"down" component, imagine what might happen when you put the engine in reverse.
Is it a possible reason, among a number of reasons - yes - the particular
application will dictate it's degree of importance, if any.

Shen

Angle of prop shaft - theoretical question
 

On 13 Jun 2004 16:18:03 GMT, (Shen44) wrote:

Subject: Angle of prop shaft - theoretical question
From: (JAXAshby)


shen, the "down" component is indeed quite noticeable. In fact, it is the
reason outboard runababouts have the steering wheel on the right side of the
boat.


"THE" reason? No.
If it was THE reason and the boat needed that offset weight to counter the
"down" component, imagine what might happen when you put the engine in reverse.
Is it a possible reason, among a number of reasons - yes - the particular
application will dictate it's degree of importance, if any.

Do they put the helm on the other side if the prop turns the other way?

Steve

Angle of prop shaft - theoretical question
 

On Sun, 13 Jun 2004 17:37:04 GMT, something compelled
(Steven Shelikoff), to say:

On 13 Jun 2004 16:18:03 GMT, (Shen44) wrote:

Subject: Angle of prop shaft - theoretical question
From: (JAXAshby)


shen, the "down" component is indeed quite noticeable. In fact, it is the
reason outboard runababouts have the steering wheel on the right side of the
boat.


"THE" reason? No.
If it was THE reason and the boat needed that offset weight to counter the
"down" component, imagine what might happen when you put the engine in reverse.
Is it a possible reason, among a number of reasons - yes - the particular
application will dictate it's degree of importance, if any.

Do they put the helm on the other side if the prop turns the other way?

They put the helm on the right hand side because the traffic
approaching you from that direction has the right of way, and
it's important that you be able to keep an eye on it.

Jeeze.

Angle of prop shaft - theoretical question
 

They put the helm on the right hand side because the traffic
approaching you from that direction has the right of way, and
it's important that you be able to keep an eye on it.

nah. outboards have had rh turning props since loooooooooooooooooooooooooooong
before the Rules of the Road (originally an east coast yacht club's racing
rules). Ole Evinrude's engines (built in Milwaukee and sold to and for
Midwestern fishermen operating on Midwestern lakes a three or four day train
ride from the east coast) turned clockwise (from the top) because most men are
right handed (and this made it easier to hand start the engine turning cw) and
a cw turning engine could have a cheaper, longer-lived thrust bearing in the
lower unit if the prop turned right, thus lifting the right side of the boat
from the reaction to the torque of the prop. Therefore, the boat operator sat
on the right side of the boat. Still true to this day for outboards.

Angle of prop shaft - theoretical question
 

On Sun, 13 Jun 2004 14:34:38 -0700, "Steve Daniels, Seek of Spam"
wrote:

On Sun, 13 Jun 2004 17:37:04 GMT, something compelled
(Steven Shelikoff), to say:

On 13 Jun 2004 16:18:03 GMT, (Shen44) wrote:

Subject: Angle of prop shaft - theoretical question
From: (JAXAshby)


shen, the "down" component is indeed quite noticeable. In fact, it is the
reason outboard runababouts have the steering wheel on the right side of the
boat.


"THE" reason? No.
If it was THE reason and the boat needed that offset weight to counter the
"down" component, imagine what might happen when you put the engine in reverse.
Is it a possible reason, among a number of reasons - yes - the particular
application will dictate it's degree of importance, if any.

Do they put the helm on the other side if the prop turns the other way?

They put the helm on the right hand side because the traffic
approaching you from that direction has the right of way, and
it's important that you be able to keep an eye on it.

Jeeze.

I was hoping it was obvious that it was a fecetious question. Guess
not.

Steve

Angle of prop shaft - theoretical question
 

Subject: Angle of prop shaft - theoretical question
From: (Steven Shelikoff)
Date: 06/13/2004 10:37 Pacific Standard Time
Message-id:

On 13 Jun 2004 16:18:03 GMT, (Shen44) wrote:

Subject: Angle of prop shaft - theoretical question
From: (JAXAshby)


shen, the "down" component is indeed quite noticeable. In fact, it is the
reason outboard runababouts have the steering wheel on the right side of
the
boat.


"THE" reason? No.
If it was THE reason and the boat needed that offset weight to counter the
"down" component, imagine what might happen when you put the engine in
reverse.
Is it a possible reason, among a number of reasons - yes - the particular
application will dictate it's degree of importance, if any.

Do they put the helm on the other side if the prop turns the other way?

Steve

Depends on the quality of construction.
A well constructed boat will have the steering station mounted on a pivot, held
in place by brass wingnuts, so's you can shift it port or stbd, depending on
prop rotation.

Shen .... the occassional troller

Angle of prop shaft - theoretical question
 

Steven Shelikoff wrote:

On 13 Jun 2004 16:18:03 GMT, (Shen44) wrote:


Subject: Angle of prop shaft - theoretical question
From: (JAXAshby)

shen, the "down" component is indeed quite noticeable. In fact, it is the
reason outboard runababouts have the steering wheel on the right side of the
boat.


"THE" reason? No.
If it was THE reason and the boat needed that offset weight to counter the
"down" component, imagine what might happen when you put the engine in reverse.
Is it a possible reason, among a number of reasons - yes - the particular
application will dictate it's degree of importance, if any.


Do they put the helm on the other side if the prop turns the other way?

Steve

YES, our 1954 Feathercraft with the 30/33hp Scott, and later 40hp
McCulloch, had the steering on the left from the factory. When we
switched to a 50hp Johnson in 1975, the steering & all controls were
moved to the right. Our 5hp Scott was a LH prop job too...

Rob

Angle of prop shaft - theoretical question
 

Subject: Angle of prop shaft - theoretical question
From: "Steve Daniels, Seek of Spam"
Date: 06/13/2004 14:34 Pacific Standard Time
Message-id:

On Sun, 13 Jun 2004 17:37:04 GMT, something compelled
(Steven Shelikoff), to say:

On 13 Jun 2004 16:18:03 GMT, (Shen44) wrote:

Subject: Angle of prop shaft - theoretical question
From: (JAXAshby)


shen, the "down" component is indeed quite noticeable. In fact, it is the
reason outboard runababouts have the steering wheel on the right side of
the
boat.


"THE" reason? No.
If it was THE reason and the boat needed that offset weight to counter the
"down" component, imagine what might happen when you put the engine in
reverse.
Is it a possible reason, among a number of reasons - yes - the particular
application will dictate it's degree of importance, if any.

Do they put the helm on the other side if the prop turns the other way?

They put the helm on the right hand side because the traffic
approaching you from that direction has the right of way, and
it's important that you be able to keep an eye on it.

Jeeze.



....... or they put it on the left, so's you can watch the traffic which is
s'posed to be gettin outa your way, depending on which you feel is more
important ..... course, for them what don't know the "Rules" and could care
less .... they puts it in the middle.