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1
Construction / Re: 1:25 scale Quarter-wheeler river Drogher
« Last post by Steven S on January 19, 2021, 10:23:16 AM »
I've been able to finish and mount the rudder.  Now I'm trying to work out the chain routing and how to attach it to the rudder and the servo.
3
Construction / Re: Hulls?
« Last post by Steven S on January 18, 2021, 12:50:47 AM »
I have been building and flying RC airplanes since my retirement several years ago.  I researched and started building my first boat, a paddlewheel towboat last March as a Covid project.  I’ve started my second boat, another paddler, as my winter Covid project.  Both my boats have very basic “barge” type hulls so I would be very interested in learning how to make a “proper” hull.  I joined the local radio control model boat club hoping to learn more, but our meetings have been shut down since September so I’m just working away, building things my own way for now.
4
Construction / Hulls?
« Last post by Eddy Matthews on January 16, 2021, 10:39:12 PM »
Hi all,

Just wondering if any of you would be interested in posting articles on building hulls?

Perhaps bread and butter construction, planked hulls, glass fibre, papier mache, styrene, gumstrip (does anyone remember gumstrip?) etc etc.... I'm sure there are lots more?

Would anyone like to take up the challenge and post an in depth article to explain the various methods?

Regards
Eddy
5
Construction / Re: Ideas for future builds
« Last post by Hankwilliams on January 16, 2021, 08:49:07 PM »
Yes, the construction of the cooperation of engine and revolving rudders really was wll devised. It´a really interesting little boat. The "Alban" was lengthened in 1848 to 26 m. The end came in 1861, obviously casco and engine was
worn out - not very long time for an iron hulled ship.
6
Construction / Re: Ideas for future builds
« Last post by Bierjunge on January 16, 2021, 09:29:58 AM »
Would the not-wheel rudders be synchronized on both sides or off-set by 90°?
Definitely both sides at the same angle:
Alban writes that when towing or hauling the boat in shallow channels, the wheel could be brought to a horizontal position, bringing all floats out of the water.
Furthermore, he writes that his paddle system is preferably driven by a single cylinder engine, which has its maximum torque at 90° crank angle when the floats on both sides are fully immersed, and passes its dead center by inertia with all floats out of the water:

If the crank goes over the dead centre, i.e. the power of the engine is zero, both blades are above water. The last drive of the engine, of which the force is not yet zero when the shovel emerges from the water, combined with the inertia of the heavy wheels, promotes the quick transition of the crank over the dead points and the wheels over the horizontal; after the transition over the dead centres, however, the new drive from the engine, which increases again immediately after this transition, will promote the entry of the blades into the water to such an extent that they immediately submerge again at the necessary speed and more to exert pressure against the water. At first, this pressure will be lower than later, because the shovel only gradually gets immersed and pushes its surface against the water. As the resistance increases, the power of the engine increases in almost the same proportion, and is increased to the greatest amount when the blades are at their lowest level. (...)
Only a single steam engine is necessary to move these wheels and keep them turning, indeed only a single one must be used, because a double one would more or less cancel out the beautiful harmony between load and force, and all relationships in the movements would be disarranged. (...)
One can easily bring the wheels entirely out of action and influence on the ship and its course, if one leaves them horizontal. This advantage is often very important in shoals and in canals, when you have to get too close to the embankment or the landing areas are shallow.


Moritz
7
Construction / Re: Blockade Runner "Colonel Lamb"
« Last post by Paddlemex on January 16, 2021, 06:13:28 AM »

Nice to see that much advance, already started with the paint.
The work on the steps is really cool.

Jurgen
8
Construction / Re: 1:25 scale Quarter-wheeler river Drogher
« Last post by Paddlemex on January 16, 2021, 06:06:47 AM »

That's a nice wheel you built, Steven. Looks great.
And the ship too, of course.

Jurgen
9
Construction / Re: Ideas for future builds
« Last post by Paddlemex on January 16, 2021, 05:57:03 AM »

Thanks for the link to the animations Moritz. I had not been able to understand the mechanism from the drawings because I did not see the fixed eccentric pivot point.

Would be an interesting model with a nice splash-splash sound.
Would the not-wheel rudders be synchronized on both sides or off-set by 90°?
Synchronized would be hard on the engine and drive train, as Thomas already mentioned, but off-set would give the boat a certain duck-walk swimming.

Jurgen
10
Construction / Re: Ideas for future builds
« Last post by Steven S on January 15, 2021, 09:35:56 AM »
Yes I understand now.  It would be interesting to make a set of these "revolving rudders" to try on a boat as a test
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