Re: Oars for Tortoise
Hi Rhett, David,
...snip...
the water and tried her out only about a week after I painted her. The
bottom scratched right down to the plywood on the sand/gravel beach I
launched from. A second Toto had about three weeks to cure, and by
then the repaired paint on the first one had a couple of months to
cure. An outing with both boats showed some scratches, but nothing
very deep or requiring immediate touch up. Be careful if you launch
within a few weeks of painting, or just accept that you may need to
touch up the paint.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
...snip...
> It's useable (with a bit of care) after a week. Your mileage may vary.Last year, I was anxious to get a Toto double-paddle canoe I built in
the water and tried her out only about a week after I painted her. The
bottom scratched right down to the plywood on the sand/gravel beach I
launched from. A second Toto had about three weeks to cure, and by
then the repaired paint on the first one had a couple of months to
cure. An outing with both boats showed some scratches, but nothing
very deep or requiring immediate touch up. Be careful if you launch
within a few weeks of painting, or just accept that you may need to
touch up the paint.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
--- Inbolger@yahoogroups.com, "captreed48" <captreed@...> wrote:
length in a fax he sent me as I neared completion on mine. He also
mentioned that any formula for oar length must take into account the
freeboard at the oarlock position. Interestingly, he wrote that he
never uses a formula, but simply uses what looks right from the body
plan and waterline (I surmised that he uses scale templates for this).
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
>Hi Rhett, Reed,
> --- Inbolger@yahoogroups.com, "ravenouspi" <ravenous@> wrote:
>
> I've used 6' oars with my Tortoise and they worked fine. The Shaw &I'll second Reed's suggestion, and also note that Bolger confirmed this
> Tenney formula give a length of 71", close enough.
length in a fax he sent me as I neared completion on mine. He also
mentioned that any formula for oar length must take into account the
freeboard at the oarlock position. Interestingly, he wrote that he
never uses a formula, but simply uses what looks right from the body
plan and waterline (I surmised that he uses scale templates for this).
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
--- Inbolger@yahoogroups.com, "ravenouspi" <ravenous@...> wrote:
I've used 6' oars with my Tortoise and they worked fine. The Shaw &
Tenney formula give a length of 71", close enough.
Reed
> 2. I am considering making a pair of culler style oars from MichalaksHi Rhett,
> plans. What would the minimum-but-still-adequate length be for oars
> for this boat? It will primarily be used for short trips from
> anchorage to shore.
>
> Any thoughts? thanks,
> Rhett
>
I've used 6' oars with my Tortoise and they worked fine. The Shaw &
Tenney formula give a length of 71", close enough.
Reed
Rhett,
Paint chemistry has gotten more and more sophisticated. Your best
source of info is your supplier, or the manufacturers website. That
said, I'll shoot from the hip: IIRC, latex paint cure has two
components: evaporation and chemical cure. You can accelerate the
initial cure two relatively achievable ways.
First, and most important, Air Movement. Set up some fans to move a
steady stream of air across the painted surfaces. Secondarily, heat.
moving air will take away the moisture evaporating out of your paint
film more quickly. Warm air will accapt more humidity (soak up more
moisture). With the product we mostly use, the cure time resembles a
hyperbolic curve. ie. at first, a short time yields a large amount of
cure. Then the process slows down (at an accelerating rate). At the
end of the cure, it takes a large amount of time to yield the final
few percentage points of cure. Our stuff takes about a month to Fully
Cure. It's useable (with a bit of care) after a week. Your mileage may
vary.
Cheers,
David Graybeal
Arbor Woodworks
Portland, OR
"Always happy to share my ignorance. I've got plenty"
*********************
Paint chemistry has gotten more and more sophisticated. Your best
source of info is your supplier, or the manufacturers website. That
said, I'll shoot from the hip: IIRC, latex paint cure has two
components: evaporation and chemical cure. You can accelerate the
initial cure two relatively achievable ways.
First, and most important, Air Movement. Set up some fans to move a
steady stream of air across the painted surfaces. Secondarily, heat.
moving air will take away the moisture evaporating out of your paint
film more quickly. Warm air will accapt more humidity (soak up more
moisture). With the product we mostly use, the cure time resembles a
hyperbolic curve. ie. at first, a short time yields a large amount of
cure. Then the process slows down (at an accelerating rate). At the
end of the cure, it takes a large amount of time to yield the final
few percentage points of cure. Our stuff takes about a month to Fully
Cure. It's useable (with a bit of care) after a week. Your mileage may
vary.
Cheers,
David Graybeal
Arbor Woodworks
Portland, OR
"Always happy to share my ignorance. I've got plenty"
*********************
--- Inbolger@yahoogroups.com, "ravenouspi" <ravenous@...> wrote:
>
> The paint is now drying on the Tortoise I built from Payson's "Build
> the New Instant Boats". And I have two lazy questions. In that I
> could probably do some research and find the answer to both. But I am
> burning daylight.
>
> 1. I am using an acrylic latex paint. It is of course soft and easily
> scratched off with a fingernail at this point. Is there any way to
> accellerate the hardening of this finish. Heat carefully applied?
> Dehumidifying? application of some common household substance? I know
> this question is probably wishfull thinking, but I do plan to need to
> use this dinghy in about 4 days from now.
> 2. I am considering making a pair of culler style oars from Michalaks
> plans. What would the minimum-but-still-adequate length be for oars
> for this boat? It will primarily be used for short trips from
> anchorage to shore.
>
> Any thoughts? thanks,
> Rhett
>
My under standing of latex hardening is it takes two weeks or so, maybe
somebody on the list knows the chemical reasons why.
HJ
ravenouspi wrote:
somebody on the list knows the chemical reasons why.
HJ
ravenouspi wrote:
> The paint is now drying on the Tortoise I built from Payson's "Build
> the New Instant Boats". And I have two lazy questions. In that I
> could probably do some research and find the answer to both. But I am
> burning daylight.
>
> 1. I am using an acrylic latex paint. It is of course soft and easily
> scratched off with a fingernail at this point. Is there any way to
> accellerate the hardening of this finish. Heat carefully applied?
> Dehumidifying? application of some common household substance? I know
> this question is probably wishfull thinking, but I do plan to need to
> use this dinghy in about 4 days from now.
> 2. I am considering making a pair of culler style oars from Michalaks
> plans. What would the minimum-but-still-adequate length be for oars
> for this boat? It will primarily be used for short trips from
> anchorage to shore.
>
> Any thoughts? thanks,
> Rhett
>
>
>
>
>
>
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The paint is now drying on the Tortoise I built from Payson's "Build
the New Instant Boats". And I have two lazy questions. In that I
could probably do some research and find the answer to both. But I am
burning daylight.
1. I am using an acrylic latex paint. It is of course soft and easily
scratched off with a fingernail at this point. Is there any way to
accellerate the hardening of this finish. Heat carefully applied?
Dehumidifying? application of some common household substance? I know
this question is probably wishfull thinking, but I do plan to need to
use this dinghy in about 4 days from now.
2. I am considering making a pair of culler style oars from Michalaks
plans. What would the minimum-but-still-adequate length be for oars
for this boat? It will primarily be used for short trips from
anchorage to shore.
Any thoughts? thanks,
Rhett
the New Instant Boats". And I have two lazy questions. In that I
could probably do some research and find the answer to both. But I am
burning daylight.
1. I am using an acrylic latex paint. It is of course soft and easily
scratched off with a fingernail at this point. Is there any way to
accellerate the hardening of this finish. Heat carefully applied?
Dehumidifying? application of some common household substance? I know
this question is probably wishfull thinking, but I do plan to need to
use this dinghy in about 4 days from now.
2. I am considering making a pair of culler style oars from Michalaks
plans. What would the minimum-but-still-adequate length be for oars
for this boat? It will primarily be used for short trips from
anchorage to shore.
Any thoughts? thanks,
Rhett