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My new baby! 6.8 Meter fiber over wood fishing boat !
- Thread starter Vulkyn
- Start date
A
apex1
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That would make a good start for you. It is well in the right size range to be built in relatively short time, and it has all the attractions of a "old" wooden boat, like tumblehome. On top of that she will perform properly without the need of a big engine.
And if done well, you even can sell her to Europe at a attractive (for both sides) price.
A good choice!
Forget about the drivel above. Nowhere in Turkey do you find such boats at the price mentioned.
Regards
Richard
check rc-groups.com for scale model bulding materials and techniques.
Of course you want to use very similar materials and glues to get a feel to the methods but there are some tricks for small scale stuff.
This my unfinished build:
http://www.rcgroups.com/forums/showthread.php?t=749703
Ignore the cold molding (mahogany veneers) and the plug building. But stuff like slicing the wood is handy tips.
Boats scale fine just don't expect them to perform too nicely or fast.
Some things change with scale a lot - for example the 1meter long sail boast need huge keels to keep them upright as the sail area scales down in square but mass in cube. (A*A vs. V*V*V)
So you can't probably use your scale boat for tank testing or predicting performance but if kept light you can certainly get a nice rc boat.
You will get a good idea of planing and rabbets and whatnots on the scale model but everything is a little bit faster (not that much btw).
Get one of these:
http://www.amazon.com/Stanley-12-10...ref=sr_1_1?ie=UTF8&s=hi&qid=1283285127&sr=8-1
Small trimming plane - super handy when kept sharp.
Of course you want to use very similar materials and glues to get a feel to the methods but there are some tricks for small scale stuff.
This my unfinished build:
http://www.rcgroups.com/forums/showthread.php?t=749703
Ignore the cold molding (mahogany veneers) and the plug building. But stuff like slicing the wood is handy tips.
Boats scale fine just don't expect them to perform too nicely or fast.
Some things change with scale a lot - for example the 1meter long sail boast need huge keels to keep them upright as the sail area scales down in square but mass in cube. (A*A vs. V*V*V)
So you can't probably use your scale boat for tank testing or predicting performance but if kept light you can certainly get a nice rc boat.
You will get a good idea of planing and rabbets and whatnots on the scale model but everything is a little bit faster (not that much btw).
Get one of these:
http://www.amazon.com/Stanley-12-10...ref=sr_1_1?ie=UTF8&s=hi&qid=1283285127&sr=8-1
Small trimming plane - super handy when kept sharp.
Vulkyn
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kerosene thats a great link ! Looks really nice!
My main concern will be the large boat but the plans will take some time in shipping and in the mean time i can sort of play around the RC idea.
Is it possible to calculate the engine i need on an RC boat by scaling it down from the full version? As i will sort of improvise my boat i need to use the gas engine i have from my planes.
Still ... i had 4 RC planes, one i didnt build properly never flow, one tore its wings off in mid flight and crashed spectacularly on a huge @$$ rock breaking everything including the engine.
1 Helicopter crash landed broke the blades and clamps holding them so ... one plane left im scared to fly it as u can see my track record aint that good lol
My main concern will be the large boat but the plans will take some time in shipping and in the mean time i can sort of play around the RC idea.
Is it possible to calculate the engine i need on an RC boat by scaling it down from the full version? As i will sort of improvise my boat i need to use the gas engine i have from my planes.
Still ... i had 4 RC planes, one i didnt build properly never flow, one tore its wings off in mid flight and crashed spectacularly on a huge @$$ rock breaking everything including the engine.
1 Helicopter crash landed broke the blades and clamps holding them so ... one plane left im scared to fly it as u can see my track record aint that good lol
small one if built the same way - has same logistics and same procedures in many ways. I really think it will help you in the process. Setting teh strong back and molds, getting a feel for working with the strips etc.
A
apex1
Guest
Mulberry is not only sufficient, it is fine.
Kerosene made some valuble points on the scale ssue.
Take care about them if scaling is a issue (which is not here).
R
R
Vulkyn
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Awesome I have access to that wood 
!
I also got the autocad files so i can get the frames cut by computer or drawn full size for easier cutting.....
I do have a quick question though, i tried to refine my search for the wood type.
Below are 2 links of Mulberry that i think are the ones we have in Egypt, i also attached some pics from where i will get it just to double check if its the right wood.
http://www.thewoodexplorer.com/maindata/we806.html
http://www.thewoodexplorer.com/maindata/we805.html
The 4th picture is white wood and mulberry frames ...
Also this link describes Egyptian mulberry wood origins
http://www2.sis.gov.eg/En/Publications/909/1589/1600/1613.htm
! I also got the autocad files so i can get the frames cut by computer or drawn full size for easier cutting.....
I do have a quick question though, i tried to refine my search for the wood type.
Below are 2 links of Mulberry that i think are the ones we have in Egypt, i also attached some pics from where i will get it just to double check if its the right wood.
http://www.thewoodexplorer.com/maindata/we806.html
http://www.thewoodexplorer.com/maindata/we805.html
The 4th picture is white wood and mulberry frames ...
Also this link describes Egyptian mulberry wood origins
http://www2.sis.gov.eg/En/Publications/909/1589/1600/1613.htm
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as with any wood - right or wrong species - the way it is grown and treated after felling makes difference. Slow drying reduces cracking and obviously less the knots and straighter the trunk the better lumber you get from it.
The boards look pretty good but the trunks maybe not so much. I am no specialist so listen to Richard.
The boards look pretty good but the trunks maybe not so much. I am no specialist so listen to Richard.
hoytedow
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Pay attention to the grain. Edge of plank should go more towards the heart of the trunk than parallel to the tangent.
Quartersawn is best. http://www.samariwoodworks.com/wood-cutting.cfm
Quartersawn is best. http://www.samariwoodworks.com/wood-cutting.cfm
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A
apex1
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As Hoyt said quarter sawn is better, but I doubt you have a choice. So we go with the average crap.
The Mulberry gives us twice the strength of the "white wood", so we can calculate half the size. Assuming that the white wood is already at the lowest end of strength, we add a margin of 20% to the size. Read: istead of 25mm of white, we use 12,5 mm + 20% = 15mm of planking.
Adding some 0,8 mm of glass / Epoxy we will be where we want to come out.
(don´t blame me for any calculations. I did none)
My opinion
others?
Richard
The Mulberry gives us twice the strength of the "white wood", so we can calculate half the size. Assuming that the white wood is already at the lowest end of strength, we add a margin of 20% to the size. Read: istead of 25mm of white, we use 12,5 mm + 20% = 15mm of planking.
Adding some 0,8 mm of glass / Epoxy we will be where we want to come out.
(don´t blame me for any calculations. I did none)
My opinion
others?
Richard
Vulkyn
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Great links guys thanks !!! I will also have to tell the yard how to cut as they just cut the wood in straight lines not in the way hoyt posted
I talked to the yard that has the wood and it seems the wood they get is recently cut trees which means its still saturated with water and needs to dry.
They just leave it in the sun, so should i ask them to cut it in 2?
As not to cause problems in the future ?
I talked to the yard that has the wood and it seems the wood they get is recently cut trees which means its still saturated with water and needs to dry.
They just leave it in the sun, so should i ask them to cut it in 2?
As not to cause problems in the future ?
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