Hi Roger A1.
Regarding this statement:
"Air has to travel further around the back of the front this means it travels faster. Faster means low pressure on the back and high pressure on the front."
I sent you a private message.
For everyone I say this:
You are right to look for an ideal curvature for your sails but think about the wing lift formula.
Considering only the factors that can be modified (certainly not the density of the air), it is clear that the surface area and the wing coefficient influence in a linear manner while the speed influences in an exponential manner.
In reality we can't even act on the speed (which is that of the wind) but just hope that there are enough knots.
I have seen sails that looked like sheets hanging out in the sun and still managed to sail even in clause hauled.
This is not to say that structuring a sail in the best possible way is not important, but what is most important is the wind.
My intent is not to criticize anyone's comments but only to reassure Rogal who did an excellent job with both the model and the sails.
Regarding this statement:
"Air has to travel further around the back of the front this means it travels faster. Faster means low pressure on the back and high pressure on the front."
I sent you a private message.
For everyone I say this:
You are right to look for an ideal curvature for your sails but think about the wing lift formula.
Considering only the factors that can be modified (certainly not the density of the air), it is clear that the surface area and the wing coefficient influence in a linear manner while the speed influences in an exponential manner.
In reality we can't even act on the speed (which is that of the wind) but just hope that there are enough knots.
I have seen sails that looked like sheets hanging out in the sun and still managed to sail even in clause hauled.
This is not to say that structuring a sail in the best possible way is not important, but what is most important is the wind.
My intent is not to criticize anyone's comments but only to reassure Rogal who did an excellent job with both the model and the sails.
She looks great on the water Roger, ballast looks spot on. I look forward to seeing her heeling over under a bit of a breeze. Did I detect a bit of power at the beginning of the video to give her a kick-start?
She looks great on the water Roger, ballast looks spot on. I look forward to seeing her heeling over under a bit of a breeze. Did I detect a bit of power at the beginning of the video to give her a kick-start?
Hi there Hermank. It is my next refurb project a 1/12 th scale Tyne lifeboat, purchased from a club member last summer. It sails very smoothly and quietly and works well, it just needs a coat of paint and all the fiddly bits adding to the deck and super structure. Should’nt take long I’ve started to refurb the crew that came with it.i will keep everyone posted as I progress
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Hi there Hermank. It is my next refurb project a 1/12 th scale Tyne lifeboat, purchased from a club member last summer. It sails very smoothly and quietly and works well, it just needs a coat of paint and all the fiddly bits adding to the deck and super structure. Should’nt take long I’ve started to refurb the crew that came with it.i will keep everyone posted as I progress
Hi andy1 I’ve sent a private message to you, if I can help. In any way PM. Me back, the members on this site have been brilliant with their help and advice, it’s been 8 weeks since I started the refurb of IngaIV and now she is complete. I could not have done it without the help, advice, photos, plans, knowledge and expertise of these wonderful worldwide bunch of guys on this brilliant Model boat web site. Photos are start and finish, Give yourselves a round of applause guys, and once again Thankyou all. Roger.⛵
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Hi andy1 I’ve sent a private message to you, if I can help. In any way PM. Me back, the members on this site have been brilliant with their help and advice, it’s been 8 weeks since I started the refurb of IngaIV and now she is complete. I could not have done it without the help, advice, photos, plans, knowledge and expertise of these wonderful worldwide bunch of guys on this brilliant Model boat web site. Photos are start and finish, Give yourselves a round of applause guys, and once again Thankyou all. Roger.⛵
Hi guys I have an Inga IV to rig, does anyone have details of sail shape,camber jig manufacturer, masts, booms, I only have the boat to renovate it's seen some damage over the years.
Also have an Atlantis the same deal hull, cabins, ballast weight and drop down motor. so I could do with some instructions plans to help me get these done and sailing.any help and pointers would be great
Hi guys I have an Inga IV to rig, does anyone have details of sail shape,camber jig manufacturer, masts, booms, I only have the boat to renovate it's seen some damage over the years.
Also have an Atlantis the same deal hull, cabins, ballast weight and drop down motor. so I could do with some instructions plans to help me get these done and sailing.any help and pointers would be great
Caber in a sail is what it makes it start to act like an airplane wing. It can be achieved by moving the back corner of the sail to form a curved gap between the boom and the foot of the sail. Movement are only very small as a starting point I would aim to 15mm to 25 mm between the boom and the sail at the mid position.
As said it works like an air plane wing. Air has to travel further around the back of the front this means it travels faster. Faster means low pressure on the back and high pressure on the front.
More camber means more drive at the expense of being able to sail code to the wind too much and tacking becomes difficult, I wouldn’t put quite as much in the small sail at the back. It’s about trial and error. Hope this helps.
Also the angle of the booms relative to the center line has an effect when sails pulled right in.The job should be further out than the mainsail to allow the air to flow round the back of the main.
The main boom should be off center by a few degrees.
Caber in a sail is what it makes it start to act like an airplane wing. It can be achieved by moving the back corner of the sail to form a curved gap between the boom and the foot of the sail. Movement are only very small as a starting point I would aim to 15mm to 25 mm between the boom and the sail at the mid position.
As said it works like an air plane wing. Air has to travel further around the back of the front this means it travels faster. Faster means low pressure on the back and high pressure on the front.
More camber means more drive at the expense of being able to sail code to the wind too much and tacking becomes difficult, I wouldn’t put quite as much in the small sail at the back. It’s about trial and error. Hope this helps.
Also the angle of the booms relative to the center line has an effect when sails pulled right in.The job should be further out than the mainsail to allow the air to flow round the back of the main.
The main boom should be off center by a few degrees.
Rogal when there is wind you will have to adjust the sails depending on the direction of the wind.
If you need, just ask. I'm not an expert but there are many good sailors here.
Rogal when there is wind you will have to adjust the sails depending on the direction of the wind.
If you need, just ask. I'm not an expert but there are many good sailors here.
Camber, is that the amount of curve on the top edge of the sail?. I was aware that this was needed to allow the sail to balloon and fill with wind, but didn’t know how much to add from a straight edge so added 40 mm in the middle to start with.I didn’t want to add to much because I was weary of sewing a curve for the first time also. Is this where the phrase “ learning curve “ comes from?.
Camber, is that the amount of curve on the top edge of the sail?. I was aware that this was needed to allow the sail to balloon and fill with wind, but didn’t know how much to add from a straight edge so added 40 mm in the middle to start with.I didn’t want to add to much because I was weary of sewing a curve for the first time also. Is this where the phrase “ learning curve “ comes from?.
Yes my question too??? I’m only a novice sailmaker, second set will be better, hopefully
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She looks lovely on the water, a really nice shape and set of sails,
Hard to tell from video but a bit more Cambel in the sails might make her sail even better
She looks lovely on the water, a really nice shape and set of sails,
Hard to tell from video but a bit more Cambel in the sails might make her sail even better
Hi Rogal.
In my opinion your ship is excellently built and could withstand the winds without any problems.
During this test there was very little wind (it seemed like no wind to me) it didn't even tilt to one side a little.
When there is more wind you will have much more fun, but as a first try it is fine.
To have fun and get satisfaction from your excellent naval model, once you have identified the direction of the wind, you will make it arrive almost on the opposite shore and then return without ever using the propeller, performing a turn and tacking when you go against the wind.
In my opinion your ship is excellently built and could withstand the winds without any problems.
During this test there was very little wind (it seemed like no wind to me) it didn't even tilt to one side a little.
When there is more wind you will have much more fun, but as a first try it is fine.
To have fun and get satisfaction from your excellent naval model, once you have identified the direction of the wind, you will make it arrive almost on the opposite shore and then return without ever using the propeller, performing a turn and tacking when you go against the wind.
Hi. Thankyou all for your comments. Yes today went better than I thought it would, no problems at all, no water in hull bone dry. No damage, nothing fell off. Although having never sailed a yacht before I went in blind and fearless not knowing what to look for, but everything is ok and safely back home. I feel more confident in going to the pond now with other members around. I think I was more scared of embarrassing myself if the maiden sail failed.i was obviously worrying about nothing.thanks again for your comments.
Hi. Thankyou all for your comments. Yes today went better than I thought it would, no problems at all, no water in hull bone dry. No damage, nothing fell off. Although having never sailed a yacht before I went in blind and fearless not knowing what to look for, but everything is ok and safely back home. I feel more confident in going to the pond now with other members around. I think I was more scared of embarrassing myself if the maiden sail failed.i was obviously worrying about nothing.thanks again for your comments.
Hello Rogal
Speaking as a fellow modeller and no expert I think she looks serene on the water and just how a beautiful sailing ketch should look. You were so fortunate with the weather not only sunshine but a light breeze just what is needed for a first trial launch.
I hope everything went as hoped and she remained dry below decks.
The video and photos give the rest of something to aim for and in my case with more speed well done my guess is you are a happy bunny tonight.
All the best ChrisG
Hello Rogal
Speaking as a fellow modeller and no expert I think she looks serene on the water and just how a beautiful sailing ketch should look. You were so fortunate with the weather not only sunshine but a light breeze just what is needed for a first trial launch.
I hope everything went as hoped and she remained dry below decks.
The video and photos give the rest of something to aim for and in my case with more speed well done my guess is you are a happy bunny tonight.
All the best ChrisG
Well done Rogal. She looks great on the water, and it was perhaps as well that there was only a light breeze for this first sail. Plenty of time to sail it in stronger winds.
What did you learn from the maiden sail ? Are you happy with everything (not many of us are, particularly with sailing craft).
Happy sailing.
😉
Well done Rogal. She looks great on the water, and it was perhaps as well that there was only a light breeze for this first sail. Plenty of time to sail it in stronger winds.
What did you learn from the maiden sail ? Are you happy with everything (not many of us are, particularly with sailing craft).
Happy sailing.
😉
Hi there fellow modellers. I started today with the task of fitting the Inga into the back of my Land Rover, this was the task as I had not dismantled the sails and rigging. It went in easily, so I then thought I had gone this far I might as well go to the pond, I had earlier filled the test container with water (bath) and set the ballast +battery to the Inga waterline, so I loaded the rest of my gear plus the Trent lifeboat, as a rescue craft, just in case we had a dead in the water!!.everything was perfect, had the pond to myself the sun was trying to show its face, only problem was the breeze was very light. Probably not a bad thing really for mine and the Inga’s maiden sail.heres the video see what you experts think? https://youtube.com/watch?v=LYOKcup1XX4&feature=shared
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Hi there fellow modellers. I started today with the task of fitting the Inga into the back of my Land Rover, this was the task as I had not dismantled the sails and rigging. It went in easily, so I then thought I had gone this far I might as well go to the pond, I had earlier filled the test container with water (bath) and set the ballast +battery to the Inga waterline, so I loaded the rest of my gear plus the Trent lifeboat, as a rescue craft, just in case we had a dead in the water!!.everything was perfect, had the pond to myself the sun was trying to show its face, only problem was the breeze was very light. Probably not a bad thing really for mine and the Inga’s maiden sail.heres the video see what you experts think?
