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Old Aug 22, 2011, 12:04 PM
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Build Log

School Boat Project at 150%


Charlie at Manzano Laser Works thought it would be fun to build my old School Boat at 150% its original size. The up-sized model comes out to 27" long with an 8" beam. The model will build light, so a single 12V S-400 motor will be used for power.

So, as long as Charlie was cutting one for himself, I asked if he'd cut me one too as it looks like aone of those "quick and dirty" projects that will look great blasting around the pond on a lazy Saturday. So, let's get started.....
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Old Aug 22, 2011, 12:13 PM
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Framing the Hull


The hull consists of a balsa deck, four formers and the keel assembly. The wood sizes are basically the same as the original design, so balsa shims were placed on the frames where necessary to make the notches fit snugly. The assembly was glued together, then the chines were added using 2 laminations of 1/8 X 1/4 balsa rather then the original 3/32 X 3/16 wood, which fit the notches perfectly.

The bottom skins were added using 3/32 balsa rather then the original 1/16 sheet since the frame spacing is really pretty wide. The 3/32 sheet side skins will be glued in after the rudder and prop shaft tubes are glued in while access is still easy. They'll still be accessable on the finished model, but installing them will difinitely be easier with access through both sides.

So if a simple project catches your eye, stay tuned, there's more coming real soon.

PAT
Old Aug 22, 2011, 12:16 PM
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Woodfumbler......
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Keep it coming.

looking good so far..
Old Aug 22, 2011, 09:28 PM
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Pet,

Even though this was my hairbrain idea I am going to let you figure out the power.

I still have a sp400 motor but no speed control. Bunch of brushless stuff around the same size. I don't think I have anything over 1500kV. Think there is a prop that would fit one of those?

charlie
Old Aug 22, 2011, 10:06 PM
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Originally Posted by portablevcb View Post
Pet,

Even though this was my hairbrain idea I am going to let you figure out the power.

I still have a sp400 motor but no speed control. Bunch of brushless stuff around the same size. I don't think I have anything over 1500kV. Think there is a prop that would fit one of those?

charlie
I have a couple of 12V S-400's here, so will try one of those on either a 3S Lipo or a 10 Cell NiCAD. I know it's going to need the weight, so the 10 cell might be the best bet -- besides, I still have 2 of them floating around here... Meanwhile, I also have a couple of old 20 or 30 amp airplane ESC's laying around too, so will probably go that way instead of shelling out the bucks for a new F/R car controller.

I still haven't figured out just how to guess at the size props are suitable for a brushless motor in boats, but guys in town are using 400 class outrunners w/ 1 1/4 - 1 1/2 inch 2 and 3 blades with pretty good success, though there's really no way to test for current draw without a data logger..

PAT
Old Aug 23, 2011, 03:39 PM
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Boats on the brain!!
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Looks simple enough.
Old Aug 23, 2011, 10:31 PM
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Well, these days I can do a data logger!! Let the games begin!

I also have a Magnetic Mayhem sitting around. I think it would be a bit of overkill, but, would make decent ballast.

I may just make a semi-scale type. I feel a need for a water cannon And maybe a siren or fog horn.
Old Aug 23, 2011, 10:52 PM
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Originally Posted by portablevcb View Post
Well, these days I can do a data logger!! Let the games begin!

I also have a Magnetic Mayhem sitting around. I think it would be a bit of overkill, but, would make decent ballast.

I may just make a semi-scale type. I feel a need for a water cannon And maybe a siren or fog horn.
Oh well, so much for simple
Old Aug 24, 2011, 12:13 AM
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Sea Dragon-Lover
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School boat project...
So did you and other children used to ride this boat to school before the oceans receded from New Mexico?

Old Aug 24, 2011, 04:25 AM
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Spreckels Lake, GGP, SF, CA
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Originally Posted by portablevcb View Post
I also have a Magnetic Mayhem sitting around. I think it would be a bit of overkill, but, would make decent ballast.

I may just make a semi-scale type. I feel a need for a water cannon And maybe a siren or fog horn.
Quote:
Originally Posted by P. Tritle View Post
Oh well, so much for simple
ROFLMAO

This thread added to WOODIES: Wooden Pleasure Craft Build Logs listing.

Path: RCGroups -> Boats -> Scale Boats ->"WOODIES..."

Lookin' forward to following along
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Latest blog entry: Ah, To be young again...
Old Aug 24, 2011, 09:20 AM
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So did you and other children used to ride this boat to school before the oceans receded from New Mexico?

He,he,he....that's funny!
Old Aug 28, 2011, 11:19 PM
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Oh yes, we road the ferry up the Rio Grande. On bad days we'd all be shoved out into the mud to slide it to the next puddle. We'd slog along in the mud for miles...

Old Sep 06, 2011, 10:39 AM
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Pat,

You finished this one yet?

charlie
Old Sep 06, 2011, 11:06 AM
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Pat,

You finished this one yet?

charlie
Charlie, No, not yet. Been too busy to get back on it, but can't wait to get going again. Everything I need to finish it is in hand, so it's down to sneeking it in when there's a few free minutes. Meanwhile, how's your's running . Can't wait to get them both out and run some formation....

PAT
Old Sep 13, 2011, 06:50 PM
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Installing the Running Gear


The rudder and prop bearing tubes were fitted and glued in place, then the rudder servo. The rudder assembly was made up from brass tube and sheet and soldered together. The servo was glued to the bulkhead with silicon and when dry the linkage was set up using #2 pushrod and steel clevises.

The motor mount was built up ands installed, and when dry the motor was glued in place with silicone. There's plenty of easy access to the motor from the top, so the ESC won't be installed until after the boat is completed.


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