A rubber/neoprene coupling, transmits the power through a smooth curve..
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Hi RossM, your answer is correct.
However, there is a more specific reason.
Regarding point 3, I have my own rule.
If I can align the engine to the propeller, I always use a fixed joint (without a joint).
I will look for the perfect alignment (or almost).
However, if there is a misalignment, it is impossible to use a fixed joint.
So the question already foresees a situation in which there is a misalignment of the engine axis and the propeller axis.
What is the best solution then?
Hi RossM, your answer is correct.
However, there is a more specific reason.
Regarding point 3, I have my own rule.
If I can align the engine to the propeller, I always use a fixed joint (without a joint).
I will look for the perfect alignment (or almost).
However, if there is a misalignment, it is impossible to use a fixed joint.
So the question already foresees a situation in which there is a misalignment of the engine axis and the propeller axis.
Alessandro
1) Loss of power and bad wear from vibration
2) Increased maintenance because of the joint
3) Extra effort required to align output shaft and drive shaft
Solution:
Double joints
These would help absorb the slight misalignments, reducing power required and wear.
Repairs could be easier with smaller sub-sections that will require service or modification
Good morning everyone, I propose a human question for those who want to participate.
This question concerns dynamic rc naval modeling.
To transmit the rotary motion from the engine to the propeller, we can use various systems.
In case it is not possible to use a single and rigid axis, joints can be put in.
Using a single joint, what problems could it cause?
What could be a valid solution and why?
I will say my opinion after the other part of the world (which is now sleeping) will have the opportunity to read.
Good morning everyone, I propose a human question for those who want to participate.
This question concerns dynamic rc naval modeling.
To transmit the rotary motion from the engine to the propeller, we can use various systems.
In case it is not possible to use a single and rigid axis, joints can be put in.
Using a single joint, what problems could it cause?
What could be a valid solution and why?
I will say my opinion after the other part of the world (which is now sleeping) will have the opportunity to read.
Hi Nick, I remember seeing some scenes on YouTube.
Nice images but I don't remember the dialogues. A movie question, in short (I took it seriously, hahahahahah).
I wonder if there was a coherent answer or just a theatrical one.
Hi Nick, I remember seeing some scenes on YouTube.
Nice images but I don't remember the dialogues. A movie question, in short (I took it seriously, hahahahahah).
I wonder if there was a coherent answer or just a theatrical one.
Alessandro, I do not know the answer, the question is from a TV show called Hornblower, it arose as a question in our hero's examination for Lieutenant. (Episode 2). Doug gave a good answer...
Alessandro, I do not know the answer, the question is from a TV show called Hornblower, it arose as a question in our hero's examination for Lieutenant. (Episode 2). Doug gave a good answer...
Hi Nick, in relation to your last question I believe that a boat that complies with your conditions (close hauled, port tack, wind from the North East) must go east, as already said (see figure 1).
If, instead, it goes north, therefore towards Dover to go close hauled it should be on starboard tack and not port (see figure 2).
In other directions it cannot be possible because all three conditions are not satisfied.
If what was said is correct I will go ahead otherwise stop me.
In answering I imagined that the boat wanted to go to Dover, but perhaps I am mistranslating.
Should it go to Dover or does it want to continue towards the East?
If it has to proceed towards the East my answer will be different.
If it has to go to Dover (even without a sudden change in the wind) it will have to tack to port (changing tack from port to starboard).
So, to recap, I gave my answer considering that the boat wants to go to Dover and that there is a change in the wind direction (from 045 to 049 degrees).
Figure 3.
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Hi Nick, in relation to your last question I believe that a boat that complies with your conditions (close hauled, port tack, wind from the North East) must go east, as already said (see figure 1).
If, instead, it goes north, therefore towards Dover to go close hauled it should be on starboard tack and not port (see figure 2).
In other directions it cannot be possible because all three conditions are not satisfied.
If what was said is correct I will go ahead otherwise stop me.
In answering I imagined that the boat wanted to go to Dover, but perhaps I am mistranslating.
Should it go to Dover or does it want to continue towards the East?
If it has to proceed towards the East my answer will be different.
If it has to go to Dover (even without a sudden change in the wind) it will have to tack to port (changing tack from port to starboard).
So, to recap, I gave my answer considering that the boat wants to go to Dover and that there is a change in the wind direction (from 045 to 049 degrees).
Figure 3.
Dunnage! We used to collect it from the docks when we were kids, for den building, carty making and for burning on Nov 5th. Of course we weren't allowed to take the decent pieces...
Dunnage! We used to collect it from the docks when we were kids, for den building, carty making and for burning on Nov 5th. Of course we weren't allowed to take the decent pieces...
Rather than impinge on QoD, perhaps we should start a new board, called something like Interrorgation club or something. Problem with the rapid fire stuff is that timezones preclude our shippers from the US Australia etc. Just a thought.. I remember on Mayhem there was a guess the photo, where photos or crops of photos of all things ships, both full size and model were posted and folk had to guess what it was.
Rather than impinge on QoD, perhaps we should start a new board, called something like Interrorgation club or something. Problem with the rapid fire stuff is that timezones preclude our shippers from the US Australia etc. Just a thought.. I remember on Mayhem there was a guess the photo, where photos or crops of photos of all things ships, both full size and model were posted and folk had to guess what it was.
I like this question, Nick:
"You're close-hauled on the port tack, beating up the channel with a north-easterly wind blowing strong, with Dover bearing north two miles. The wind veers four points, taking you flat aback. What do you do, sir?"
but I can't translate it correctly and understand.
If you are on port tack, the wind is coming from the North East (45 degrees) and you are sailing close hauled, then you are heading East (090 degrees), right?
If the wind shifts and comes from 49 degrees you enter the blind spot suddenly.
If these are the correct premises.
I would bear away first (move the bow away from the direction of the wind) in order to immediately recover the close hauled pace.
But immediately after that I should tack to port and go on starboard tack.
"You're close-hauled on the port tack, beating up the channel with a north-easterly wind blowing strong, with Dover bearing north two miles. The wind veers four points, taking you flat aback. What do you do, sir?"
but I can't translate it correctly and understand.
If you are on port tack, the wind is coming from the North East (45 degrees) and you are sailing close hauled, then you are heading East (090 degrees), right?
If the wind shifts and comes from 49 degrees you enter the blind spot suddenly.
If these are the correct premises.
I would bear away first (move the bow away from the direction of the wind) in order to immediately recover the close hauled pace.
But immediately after that I should tack to port and go on starboard tack.
Thanks for that very interesting question and answer (Nick & Alessandro) I never fixed a Decca Navigator but did get a small Decca radar working for a someone. Anyone interested in the Decca Navigator the link is interesting (I thought so 😁)
https://www.jproc.ca/hyperbolic/decca_hist.html
Thanks for that very interesting question and answer (Nick & Alessandro) I never fixed a Decca Navigator but did get a small Decca radar working for a someone. Anyone interested in the Decca Navigator the link is interesting (I thought so 😁)
Before asking a question about navigation and a question about modeling I wanted to explain why Doug's answer to the question about the color of the bear was correct.
The question from the distant message nr. 4184 was this:
An explorer, after setting up his tent, sets off on a mission. He first travels five kilometers south, then, relying on his compass, he travels another five kilometers east.
But he still wants to explore and changes course again, this time the five kilometers are north and to his great surprise he discovers that he's back where he started. He sees his tent and a bear rummaging around in it.
The question is:
WHAT COLOR IS THE BEAR.
The only place where going south then east then north brings you back to where you started (Traveling the same distances) is the North Pole.
Before giving any more detailed explanations just look at the figure to understand.
The meridians cross in two points. It would be the same at the South Pole too, but there are no bears there.
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Before asking a question about navigation and a question about modeling I wanted to explain why Doug's answer to the question about the color of the bear was correct.
The question from the distant message nr. 4184 was this:
An explorer, after setting up his tent, sets off on a mission. He first travels five kilometers south, then, relying on his compass, he travels another five kilometers east.
But he still wants to explore and changes course again, this time the five kilometers are north and to his great surprise he discovers that he's back where he started. He sees his tent and a bear rummaging around in it.
The question is:
WHAT COLOR IS THE BEAR.
The only place where going south then east then north brings you back to where you started (Traveling the same distances) is the North Pole.
Before giving any more detailed explanations just look at the figure to understand.
The meridians cross in two points. It would be the same at the South Pole too, but there are no bears there.
Great Nick, you also brought us back to naval modeling.
Great question, very good.
I had no doubts about who would definitely answer first: Doug.
Very knowledgeable on these topics.
I wanted to make a clarification on this matter but it is better that I abstain because I could be misunderstood.
More questions of this kind will be very useful to everyone.
Great Nick, you also brought us back to naval modeling.
Great question, very good.
I had no doubts about who would definitely answer first: Doug.
Very knowledgeable on these topics.
I wanted to make a clarification on this matter but it is better that I abstain because I could be misunderstood.
More questions of this kind will be very useful to everyone.
Pat, the pace has become relentless, from one question a day we have gone to three questions a day. It is no longer a game but a profession, ahahahahah.
I'm joking, the questions about sailing and maneuvering were very interesting but if you want the whole world to read and answer the questions you have to give them more time, at least twenty-four hours.
I'm sorry if I was not able to participate as actively as I would have liked but on the specific terms of sailing there are too many difficulties with the normal translators (I'm not up to the task).
Unfortunately I didn't have time today.
Anyway I learned two new terms in English that I didn't know thanks to you: "Square Rigger" and "Box Hauling".
You should make a small summary glossary in the appropriate section of this site, because in the thousands of messages on the forum this information will get lost.
Pat, the pace has become relentless, from one question a day we have gone to three questions a day. It is no longer a game but a profession, ahahahahah.
I'm joking, the questions about sailing and maneuvering were very interesting but if you want the whole world to read and answer the questions you have to give them more time, at least twenty-four hours.
I'm sorry if I was not able to participate as actively as I would have liked but on the specific terms of sailing there are too many difficulties with the normal translators (I'm not up to the task).
Unfortunately I didn't have time today.
Anyway I learned two new terms in English that I didn't know thanks to you: "Square Rigger" and "Box Hauling".
You should make a small summary glossary in the appropriate section of this site, because in the thousands of messages on the forum this information will get lost.
One for the navigators and cartographers
In the 1970’s an 80’s there was a navigation system that had a receiver normally located on the bridge or in the chartroom before the days of Satnav
The charts of the day had had hyperbolic lines on them that crossed - there were three colours each responding to the colour of a dial on the receiver sing the values from the receiver you could plot you position on the chart
Anyone remember what the name of the system was ?
In the 1970’s an 80’s there was a navigation system that had a receiver normally located on the bridge or in the chartroom before the days of Satnav
The charts of the day had had hyperbolic lines on them that crossed - there were three colours each responding to the colour of a dial on the receiver sing the values from the receiver you could plot you position on the chart
Anyone remember what the name of the system was ?
One for the sailors...
"You're close-hauled on the port tack, beating up the channel with a north-easterly wind blowing strong, with Dover bearing north two miles. The wind veers four points, taking you flat aback. What do you do, sir?"
One for the sailors...
"You're close-hauled on the port tack, beating up the channel with a north-easterly wind blowing strong, with Dover bearing north two miles. The wind veers four points, taking you flat aback. What do you do, sir?"
Nice one Pat. I didn't notice it was a down wind sail. As my teacher always said "Martin should pay more attention" 😀 It was on most of my early school reports..
Nice one Pat. I didn't notice it was a down wind sail. As my teacher always said "Martin should pay more attention" 😀 It was on most of my early school reports..
No Pat.
Before you even reach for any switches, install batteries, or even bind the RX, the precaution Nick means is taken at the fitting out stage of the electrics (wiring)-
MAKE SURE ONLY ONE OF THE BECs IS CONNECTED TO THE RECEIVER!
Cut the Red lead (BEC + supply to RX) from one of the ESCs and isolate it, or pull the pin out of the plug and tape it back.
Otherwise the two BEC voltages will be connected together.
Which can damage either RX or ESCs or both.
Cheers, Doug😎
PS If you have a separate battery for the receiver then you MUST cut both of the Red leads from the ESCs.
No Pat.
Before you even reach for any switches, install batteries, or even bind the RX, the precaution Nick means is taken at the fitting out stage of the electrics (wiring)-
MAKE SURE ONLY ONE OF THE BECs IS CONNECTED TO THE RECEIVER!
Cut the Red lead (BEC + supply to RX) from one of the ESCs and isolate it, or pull the pin out of the plug and tape it back.
Otherwise the two BEC voltages will be connected together.
Which can damage either RX or ESCs or both.
Cheers, Doug😎
PS If you have a separate battery for the receiver then you MUST cut both of the Red leads from the ESCs.
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
Sorry Shipmates just got home from a medical appointment
The correct answer to my questions are as follows:-
The triangular sail as shown in the picture is called a Raffee
Doing a three point turn in a Square Rigger is called Box Hauling
Pat
Well Pat. I will have another go. Could it be a: fore gaff topsail, also called a jib-headed topsail, or maybe a standing gaff topsail (Shoulder of mutton) 😁 A Lug Sail?
Well Pat. I will have another go. Could it be a: fore gaff topsail, also called a jib-headed topsail, or maybe a standing gaff topsail (Shoulder of mutton) 😁 A Lug Sail?
Nick and SSailor a picture attached just to clarify
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In answer to Pat's question. Could it be the Main Gaff Topsail ?
"My first question of the day:-
On big sailing ships most notably topsail schooners and t'gallent schooners what is the name of to triangular sail that has it's foot on the uppermost yard and comes to a point at the mast head"
In answer to Pat's question. Could it be the Main Gaff Topsail ?
"My first question of the day:-
On big sailing ships most notably topsail schooners and t'gallent schooners what is the name of to triangular sail that has it's foot on the uppermost yard and comes to a point at the mast head"
Hi Mike, the Flinders bar is a soft iron bar that serves to counteract the horizontal effect of vertical magnetism.
For more details and to see how it is made and where it is located I attach some photos and some links.
https://en.m.wikipedia.org/wiki/Flinders_bar
https://auth.scribd.com/u/signup?state=hKFo2SBFZ2FwODBySGRQVW55ZDJCYmxUUmJvTDZtX2EtcW9RbaFur3VuaXZlcnNhbC1sb2dpbqN0aWTZIEVUM3lJdTlna2tHYVAtcXlITDZuMG9EQXRMZXlmUDBjo2NpZNkgZ3ljN3lyZnpzdkpmaXd5bHNlYXU4Y3g5dVZhb2FOU1A&ui_locales=it
https://en.m.wikipedia.org/wiki/Flinders_bar https://auth.scribd.com/u/signup?state=hKFo2SBFZ2FwODBySGRQVW55ZDJCYmxUUmJvTDZtX2EtcW9RbaFur3VuaXZlcnNhbC1sb2dpbqN0aWTZIEVUM3lJdTlna2tHYVAtcXlITDZuMG9EQXRMZXlmUDBjo2NpZNkgZ3ljN3lyZnpzdkpmaXd5bHNlYXU4Y3g5dVZhb2FOU1A&ui_locales=it
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Hi Mike, the Flinders bar is a soft iron bar that serves to counteract the horizontal effect of vertical magnetism.
For more details and to see how it is made and where it is located I attach some photos and some links.
